Heel system for a shoe

Abstract

A heel system (1) for a shoe with a heel body (2) that can be attached to or is attached to the shoe and a tread (3), wherein the heel body (2) is connected or connectable to the tread (3) via a first connecting device (4) which has at least one connecting element (5), and the heel body (2) and the tread (3) are designed such that at least one cavity (9, 11, 15) is formed between the heel body (2) and the tread (3) in the connected state, which surrounds at least a part of the at least one connecting element (5) on at least two sides, characterized in that the heel body (2) and the tread (3) each have a sealing element (16, 17), wherein the sealing elements (16, 17) are arranged such that a first sealing element (16) limits an outer cavity (15) to the outside and a second sealing element (17) limits the outer cavity (15) to the inside.

Description

Field of invention

[0001] The present invention relates to a heel system for a shoe, comprising a heel body and a tread that can be attached to or is attached to the shoe, the latter being connected or connectable via a connecting device with one or more connecting elements, as well as an associated heel body and a corresponding tread. Furthermore, the present invention relates to a connecting system for connecting a tread to a heel body. Background of the invention

[0002] A shoe typically has a heel at its rear end (as viewed from the walking direction), which can wear down due to the stresses of walking or running. This wear is typically noticeable as abrasion of the heel, which, if continued, may necessitate the replacement of the heel or part of it. It is therefore known to provide a replaceable heel pad to facilitate replacement. The shoe's heel comprises a heel body, which is connected to the main part of the shoe on one side and to the replaceable heel pad on the other. To ensure replaceability, a connection must be established between the heel body and the heel pad that provides a reliable hold under a wide variety of shoe usage conditions, while simultaneously allowing for easy removal and replacement.

[0003] Conventionally, the tread block is attached to the heel body using adhesive. However, this adhesive bonding complicates the replacement process because, for example, it requires sanding off adhesive and rubber residue before applying the new tread block. This usually needs to be done by a specialist with the appropriate tools. Finally, such a replacement process is also time-consuming.

[0004] However, alternatives for connecting the running surface to the heel body are also known from the prior art, which are described below.

[0005] From US 2 239 600 A and DE1139408B it is known to provide pins on a heel body which can engage in recesses of a running surface that can be connected to the heel body.

[0006] US 1 740 976 A discloses a profiled rubber heel prepared for attachment by nails driven in from above or from the heel side.

[0007] US 3 063 168 A discloses a shoe heel arrangement comprising a heel base, a mounting plate attached to the underside of the heel base, a centered ring of circumferentially spaced L-shaped locking tongues on the mounting plate, and a heel whose upper surface rests against the underside of the mounting plate.

[0008] From DE 10 2016 101 617 A1, an interchangeable platform system for attachment to an outsole of a shoe is known, comprising a base part and a platform sole that can be attached to the base part, wherein the platform sole has a base with a running surface arranged on the outside of the base and a mantle adjoining the base with an outwardly visible outer mantle surface, and the base part is partially or completely enclosed by the base and the mantle of the platform sole.

[0009] US 3 068 592 A discloses a shoe heel construction with an upper heel element having a wedge receptacle and several dowel receptacles in its underside, and a lower heel runner element comprising an upwardly extending wedge and several upwardly extending dowels that detachably engage in the wedge receptacle and the dowel receptacles.

[0010] In KR 10 2011 0 138 476 A, the connection between the pin and the receptacle is achieved by the pin having a mushroom shape and the receptacle having an undercut to accommodate the mushroom head. This ensures a positive fit of the pin in the receptacle, requiring a greater force to release the connection between the heel body and the tread.

[0011] US Patent 2,173,558 A discloses a dovetail joint for connecting the heel body to the tread. The dovetails are arranged parallel to the longitudinal direction of the shoe, allowing the tread to be slid longitudinally onto the heel body. Longitudinal fixation is achieved by a locking pin.

[0012] DE 913 990 B describes a tread block with ribs that have a head-like end and are pressed into a corresponding recess on the heel body for connection. Furthermore, resilient ribs are provided on the tread block, which exert a compressive force on the heel body, creating an air cushion between the end face of the rib and its recess to dampen impact. This also serves to tension the ribs within the recess, resulting in an improved connection.

[0013] Finally, DE 627 921 A discloses a running patch which is attached to the heel body by pins. The pins are arranged in a horseshoe shape at the edge of the running patch and surround an air cushion which, when connected between the heel body and the running patch, provides cushioning.

[0014] The systems known from the prior art still exhibit various disadvantages with regard to the reliability of the connection between the heel body and the tread and the associated walking or wearing comfort, the ease of replacing the tread, and the sustainability of the system.

[0015] The object of the present invention is therefore to provide an improved heel system, an improved heel body and tread, and an improved connection system that solve the aforementioned problems at least partially or completely.

[0016] This problem is solved by the subject matter of independent claims 1 and 16-19. Further advantageous and preferred embodiments of the invention can be found in the dependent claims, the figures, and the following description. Description of the invention

[0017] According to the basic concept of the invention, a heel system for a shoe is proposed, comprising a heel body that can be attached to or is attached to the shoe and a tread, wherein the heel body is connected to or connectable to the tread via a first connecting device which has at least one connecting element. According to the invention, the heel body and the tread are designed such that, in the connected state, at least one cavity is formed between the heel body and the tread, which surrounds at least part of the at least one connecting element on at least two sides.

[0018] The inventor recognized that one of the main causes of the well-known problems with conventional heel-to-toe interchangeable heel systems lies in dirt and other foreign particles that can penetrate and accumulate between the heel and the tread during walking. With unglued heel-to-toe interchangeable heel systems, this particle ingress is practically unavoidable, especially in wet conditions. Surprisingly, it has been shown that even small amounts of foreign particles can significantly impair the system's fit if they are uncontrolled between the heel and the tread. Typical consequences of this uncontrolled particle ingress are reduced durability of the bond, poor or unhealthy footing, reduced walking comfort, and increased wear, which usually affects the tread most severely.

[0019] This problem is solved according to the invention by means of the cavity between the heel body and the tread. The cavity allows foreign particles that penetrate the heel system during walking to settle in a controlled manner and at a predefined location between the heel body and the tread. Because the cavity surrounds the connecting element on at least two sides, the foreign particles in the connection area have little or no effect on the fit geometry of the heel body and the tread. In this way, the joining and function of the heel system according to the invention are not significantly impaired even if foreign particles penetrate; the reliability of the connection, good heel stability, and high walking comfort of the shoe are maintained.

[0020] A cavity within the meaning of the present invention is understood to be a predefined space that is at least partially or completely closed to the outside and is intentionally created or formed by design measures between the heel body and the tread in the connected state, thereby reducing the contact area between the heel body and the tread. In particular, cavities that are formed accidentally, for example, due to air inclusions or manufacturing tolerances during the manufacture of the heel system or tread, are not a cavity within the meaning of the invention.

[0021] "Two-sided" in the context of the present invention refers to the different sides of the heel system. The heel system has an upper surface facing the main part of the shoe and a profileable or profiled underside facing the ground during walking. Furthermore, the flank of the heel system, which is arranged between the upper and underside of the heel system, has several sides; in particular, a front, a back, and two wing sides arranged between them. If a connecting element is surrounded on two sides by a cavity, then a cavity is arranged between the connecting element and at least two different sides of the heel system. Preferably, a portion of the connecting element is surrounded on at least two sides of the flank.In preferred embodiments, the cavity is then arranged at least partially between the connecting element and at least two sides of the flank, in particular the two wing sides and, if applicable, the rear side.

[0022] The cavity according to the invention can also be segmented, for example by separating elements or walls, or by further connecting elements that can at least partially interrupt the cavity. Preferably, however, the cavity according to the invention is not segmented.

[0023] It is understood that two or more connecting elements may also be present, which are surrounded by the cavity on at least two sides. Preferably, a cavity according to the invention surrounds the entire connecting device on at least two sides, and particularly preferably on at least three sides. In this case, all connecting elements of the first connecting device are also surrounded by the cavity on at least two or at least three sides. Of course, it is also possible for the cavity to completely surround the connecting element(s) or the connecting device between the heel body and the tread. In these variants, the heel system is particularly advantageously protected against the effects of foreign particles.

[0024] According to a preferred embodiment, at least one spacer is provided on the heel body and / or on the tread, which separates the heel body and the tread from each other, forming at least one cavity. The spacer is preferably designed and / or arranged such that a surface of the tread opposite the heel body and / or a surface of the heel body opposite the tread opposite the tread abuts it in the connected state, thus creating the cavity according to the invention.

[0025] The spacer ensures that the cavity forms reliably when the heel body and tread are joined, and that it retains its structure and function even when the heel system is subjected to stress, such as weight loads during walking.

[0026] In embodiments where the first connecting device has two or more connecting elements, the spacer preferably comprises a first spacer arranged between at least two of the connecting elements of the first connecting device. With multiple connecting elements, at least one first spacer can be arranged between each pair of connecting elements. This specific arrangement of the spacers provides a cavity between the connecting elements, which, even under load on the heel system, ensures a controlled arrangement of any foreign particles that may have penetrated the sensitive area between the connecting elements. This prevents foreign particles from accumulating disruptively or dysfunctionally in the heel system and, for example, causing the tread to lift unevenly from the heel body and / or being pressed into the connecting mechanism.This ensures improved walking comfort over longer periods and even under adverse conditions where the heel system is increasingly exposed to dirt and moisture, and guarantees a reliable hold of the connection.

[0027] Preferably, the first spacer comprises a projection extending from a surface of the heel body facing the tread in the connected state to an opposite surface of the tread. Particularly preferably, the projection is designed as a dot-like or knob-like surface structure on the heel body. In this way, a corresponding cavity between the heel body and the tread can be created particularly easily and with significant material savings. Alternatively or additionally, it is of course also possible for the projection to extend from a surface of the tread facing the heel body in the connected state to an opposite surface of the heel body.

[0028] In preferred embodiments, a plurality of first spacers are arranged between the connecting elements such that a continuous inner cavity is formed, which surrounds at least a portion of the connecting elements. As the term is used here, a connecting element is surrounded by the inner cavity when the latter is completely located between the connecting element and at least the four flanks of the heel system. This ensures that even larger quantities of foreign particles that have penetrated the heel collect particularly effectively within the inner cavity and thus cannot negatively affect the walking comfort or durability of the heel system. In preferred embodiments, at least two, at least four, at least six, or at least eight first spacers are arranged between the connecting elements.

[0029] According to an advantageous embodiment, the spacer comprises a second spacer that flanks or surrounds the first connecting element on at least two sides, thereby at least partially limiting the at least one cavity or the inner cavity to the outside. By limiting the inner cavity to the outside, the structure of the cavity is advantageously stabilized under load, and at the same time the probability of ingress of foreign particles and moisture is reduced. In this way, the system is particularly effectively protected against the effects of dirt and foreign particles. In a preferred embodiment, the second spacer is designed as a single web or in the form of several webs. Due to the elongated and narrow extension of the web, the spacer can be arranged relatively far out on the shoulder system without restricting the space for the connecting elements.Preferably, the bridge flanks or surrounds the connecting device on three or four sides, thereby achieving a particularly high stabilization and barrier function.

[0030] It is particularly advantageous if the first and second spacers are designed to form a common internal cavity together.

[0031] In a further embodiment, at least one sealing element is arranged on the heel body and / or the running surface, which seals the at least one cavity at least partially to the outside. The sealing element offers the advantage that foreign particles and moisture are reliably kept away from the connection device. Preferably, a lip is provided as the sealing element, which terminates with a sealing edge that, in the connected state, rests against the opposite heel body and / or running surface.

[0032] According to the subject matter of claim 1, both the heel body and the tread pattern each have a sealing element, wherein the sealing elements are arranged such that a first sealing element defines an outer cavity to the outside and a second sealing element defines the outer cavity to the inside. This creates an outer cavity which, preferably in addition to the inner cavity, provides protection against penetrating foreign particles or neutralizes the negative effects of any foreign particles that have penetrated.

[0033] It should be noted that the cavity formed by the first and second sealing elements can be the at least one cavity according to the invention, namely when a part of at least one connecting element is surrounded by it on at least two sides. Preferably, both the outer and the inner cavity are present, the outer cavity ensuring that foreign particles are effectively prevented from penetrating further to the inner cavity and / or the connecting elements and are collected there. Preferably, the outer cavity is completely sealed from the inner cavity and / or the surroundings by the second sealing element. In principle, it is also possible to provide only the outer cavity formed by the two sealing elements; the first and / or second spacer could then be omitted.

[0034] It is further preferred if the first sealing element is assigned to the heel body and the second sealing element to the tread. Thus, in typical use of the shoe, the inner second sealing element is located on the lower tread and the outer first sealing element on the upper heel body. Preferably, the second sealing element has an outwardly directed slope with a gradient between 10° and 90°, more preferably with a gradient between 45° and 80°. This ensures that any liquid that has penetrated the outer cavity flows off along the slope instead of being transported further into the heel system by the walking motion. In a further preferred embodiment, the tread additionally has an outwardly chamfered edge for this purpose, to which the second sealing element connects or which transitions into the second sealing element. Preferably, the chamfer is shallower than the second sealing element.The chamfer helps to forcefully direct liquid and dirt, which have been captured by the second sealing element, outwards.

[0035] Preferably, the outer cavity between the first sealing element and the second sealing element extends such that the first connecting element is surrounded on two or three sides by the outer cavity. This allows the outer cavity to trap penetrating dirt and foreign particles particularly effectively and to protect the step system effectively. It is understood that in this case, at least part of a connecting element is also surrounded by the outer cavity, so that the outer cavity is again a cavity according to the invention.

[0036] According to a further embodiment of the invention, the connecting element of the first connecting device is formed by a stud and a corresponding receptacle, which are designed such that, in the connected state, a force-fit and / or friction-fit connection exists between the stud and the receptacle. Such connecting elements have proven advantageous within the scope of the invention because they are inexpensive to manufacture and do not require additional materials such as metallic fittings. Furthermore, it is advantageous if the receptacle for the stud extends deeper than the stud itself, i.e., the depth of the receptacle is greater than the length of the stud, so that an additional cavity is formed between the end face of the stud and the base of the receptacle.In the event that, despite the cavities according to the invention, individual foreign particles penetrate as far as the connecting elements, these can arrange themselves in the cavity between the receiving base and the stud, thus counteracting a negative impairment of the functionality of the connecting elements.

[0037] Preferably, the stud has a cross-section that is at least partially star-shaped, preferably completely star-shaped. Surprisingly, it has been found that the at least partially star-shaped design of the stud, and the associated increase in the contact area between the stud and the receptacle, achieves a suitably stable and reliable connection between the tread and the heel body with minimal material usage and without additional fittings or adhesives. This connection can also be easily released if necessary. In preferred embodiments, the cross-section of the stud has a diameter of at least 4 mm, at least 5 mm, or at least 6 mm and / or a diameter of at most 10 mm, at most 9 mm, or at most 8 mm.

[0038] Furthermore, it is preferred if the stud is assigned to the heel body and the receptacle to the tread. The inventor has recognized that in this way the replaceable tread can be designed in a particularly material-saving manner, which leads not only to lower costs but also, in particular, to improved sustainability compared to conventional heel systems.

[0039] According to the subject matter of claim 16, the first connecting device comprises a plurality of connecting elements which are arranged along a longitudinal and / or transverse direction of the shoe, at least sectionally, on the heel body or the tread. This distribution of the connecting elements ensures that the forces acting between the heel body and the tread are evenly distributed among the individual connecting elements, thus achieving a particularly reliable connection between the tread and the heel body by the first connecting device. For example, at least two, at least three, at least four, at least five, at least six, or more connecting elements may be arranged in the longitudinal and / or transverse direction. Preferably, the first connecting device comprises a total of 10 to 100 connecting elements, more preferably 30 to 60 connecting elements, and particularly preferably 40 to 50 connecting elements.

[0040] According to a further embodiment, a second connecting device is provided, spatially separated from the first, and is designed as a positive-locking connection. The positive-locking connection ensures that the heel body and the tread can only be separated from each other by destruction, at least in one direction. Preferably, the positive-locking connection is designed to prevent the tread from detaching towards the floor or substantially perpendicular to the heel plane. The inventor found that in this way, the effects of the force-locking and / or friction-locking connection and the positive-locking connection complement each other particularly advantageously, resulting in improved stability of the heel system that reliably withstands the various loads typically acting on a heel.

[0041] In a preferred embodiment, the first connecting element is arranged in a front connecting area of ​​the heel system, and the second connecting element is arranged in a rear connecting area of ​​the heel system, which, with respect to the direction of travel, is located between the front connecting area and a rear edge of the heel system or the rear end of the shoe. For the purposes of this invention, the direction of travel is understood to mean, according to the usual understanding of those skilled in the art, the direction that points from the rear end of the shoe towards the toe. Preferably, the first connecting element is arranged at least partially or predominantly in the front half of the heel system, and the second connecting element is arranged predominantly or exclusively in the rear half.Particularly preferred is the first connection direction arranged predominantly or exclusively in the front two-thirds of the heel system, and the second connection device arranged predominantly or exclusively in the rear third of the heel system. Arranging the second positive-locking connection device in the rear connection area is advantageous because this is where the highest forces, for example those caused by stepping on the heel, can typically act on the connection between the tread and the heel body.

[0042] Preferably, the two connecting devices are designed such that the joining and disengaging of the first and second connecting devices occurs at least partially in different directions relative to each other; preferably, these joining and disengaging directions are at least partially orthogonal to each other. According to the invention, this ensures that the two connecting devices secure each other and that the connection between the heel body and the tread can only be released by a targeted disengaging movement.

[0043] It has proven advantageous if the second connecting element is formed by an undercut and an undercut receptacle. Preferably, in the connected state, a further or third cavity is formed between an end face of the undercut and a surface opposite it, and / or between an end face of the undercut receptacle and a surface opposite it.

[0044] This has the advantage that foreign particles, which are transported into this area particularly when the undercut is inserted into the undercut receptacle and by the flexing action during walking, can be isolated in the cavity; the insertion process and the joining of the connection are thus not negatively affected by foreign particles. Preferably, the undercut receptacle is located on the tread and the undercut itself on the heel body. Since the undercut receptacle requires less material, it is advantageous, for reasons of cost and sustainability, to provide it on the replaceable tread.

[0045] In an alternative solution according to claim 16, the connecting elements of the first connecting device, in particular the studs as part of the connecting elements, have at least partially different heights, with the height of the connecting elements decreasing towards the rear of the shoe in the direction of travel. The changing height of the connecting elements in the direction of travel results in an advantageous mounting and dismounting direction for the insole, which significantly facilitates the sliding on and off of the insole, especially compared to the first and second connecting devices acting in different directions. Both the mounting and dismounting of the insole can thus be carried out by the shoe wearer themselves without specialist knowledge, manual skills, tools, or adhesives.Parts of the connecting elements designed as studs preferably have a length of at least 5 mm, at least 6 mm or at least 7 mm and / or at most 10 mm, at most 9 mm or at most 8 mm.

[0046] According to a further embodiment, the heel body and the running surface each have a planar intermediate section between the first and second connecting devices, with a third spacer being provided to space the intermediate sections. This creates a further cavity between the two planar intermediate sections, which effectively protects this area from the negative effects of introduced foreign particles.

[0047] A particular advantage of the invention is that the heel body and / or the tread in the embodiments described above can each be formed in one piece and / or made of the same material. For example, it is possible for the heel body, spacer, sealing element, and / or connecting elements or knobs to form a single workpiece and / or be made of one material. Likewise, it is possible for the tread, spacer, sealing element, and / or connecting elements or receptacles to form a single workpiece and / or be made of one material. In this way, both the heel body and the tread can be manufactured simply and cost-effectively, for example, using injection molding. Furthermore, this eliminates the need for connecting elements made of other materials, so that, in particular, no metallic components such as screws, nails, rivets, or spring connections are present in the heel system according to the invention.Furthermore, it is advantageous that no additional hard plastics need to be incorporated to ensure a reliable bond. In preferred embodiments, the heel body and / or the tread can be formed partially or completely from a dimensionally stable but elastically deformable plastic. Elastomers with a hardness of at least 65 Shore A or at least 75 Shore A and / or with a hardness of at most 100 Shore A or at most 90 Shore A, which possess advantageously high mechanical strength, are particularly suitable. A suitable method for determining the Shore A hardness is known to those skilled in the art, for example, from DIN ISO 7619-1, dated February 2012. Vulcanizates of natural and / or synthetic rubbers are particularly preferred.

[0048] A second aspect of the invention according to the subject matter of claim 17 relates to a heel body with an upper surface facing a shoe, an underside facing a running surface, and a flank arranged between the upper surface and the underside. At least a part of a connection system for connecting the heel body to the running surface is provided on the underside of the heel body, comprising a first connection device designed to connect the heel body to the running surface in a front connection area, the first connection device having several connection elements.Additionally, the connection system features a second connection device designed to connect the heel body to the tread in a rear connection area, the rear connection area being positioned between the front connection area and a rear end of the shoe in relation to the direction of travel. The connecting elements of the first connection device are each configured to create a force-fit and / or friction-fit connection between the heel body and the tread. The second connection device is configured to create a positive-fit connection between the heel body and the tread.

[0049] A third aspect of the invention according to the subject matter of claim 18 relates to a running surface with a profiled or profileable underside, an upper surface facing or oriented towards a heel body of a shoe, and a flank arranged between the upper surface and the underside. At least a part of a connection system for connecting the running surface to the heel body is provided on the upper surface of the running surface, comprising a first connection device designed to connect the running surface to the heel body in a front connection area, wherein the first connection device has several connection elements.Additionally, the connection system features a second connection device designed to connect the tread to the heel body in a rear connection area, the rear connection area being positioned between the front connection area and a rear end of the shoe with respect to the direction of travel. The connecting elements of the first connection device are each configured to create a force-fit and / or friction-fit connection between the tread and the heel body. The second connection device is configured to create a positive-fit connection between the tread and the heel body.

[0050] Finally, in a fourth aspect of the invention, according to the subject matter of claim 19, a connection system for joining a tread to a heel body of a shoe is proposed. The connection system has a first connection device designed to connect the tread to the heel body in a front connection area, the first connection device comprising several connection elements. Additionally, a second connection device is provided, designed to connect the tread to the heel body in a rear connection area, the rear connection area being arranged between the front connection area and a rear end of the shoe with respect to the direction of travel. The connection elements of the first connection device are each configured to establish a force-fit and / or friction-fit connection between the tread and the heel body.The second connection device is designed to create a positive-locking connection between the tread and the heel body. By means of the combination according to the invention of a positive-locking connection in the rear connection area and a friction-locking and / or force-locking connection in the front area, a connection system is provided that is particularly resistant to the diverse stresses to which a shoe heel is typically subjected.

[0051] Another advantage is that the tread plate can be changed quickly and reliably without tools or adhesives. This eliminates the need to sand off adhesive and rubber residue, which can be released into the environment as fine particles, and to dispose of potentially toxic and poorly biodegradable adhesives. Furthermore, the process is simplified and accelerated because the application, drying, and curing of adhesive are no longer necessary. Finally, this allows the wearer to attach different tread plates with varying heights and / or profiles, such as deep and shallow grooves, to the heel, depending on the intended use. This enables quick and easy exchange and reuse in changing weather or usage conditions.

[0052] Advantageous and preferred embodiments of the heel body according to the second aspect of the invention, the tread pattern according to the third aspect of the invention, and the connection system according to the fourth aspect of the invention correspond, as far as applicable, to those of the heel system according to the invention. Features and advantages disclosed above and below for the heel system may therefore also relate to the heel body, the tread pattern, and the connection system, and vice versa. Brief description of the characters

[0053] The invention is explained below with reference to preferred embodiments and the accompanying figures. These figures represent only schematic diagrams of the principles and are to be understood as examples only. The invention is by no means limited to the figures shown. For the sake of clarity, recurring features are sometimes not identified multiple times with a reference numeral. The figures show: Fig. 1 a perspective view of a sales system according to the invention; Fig. 2 a first perspective view of a running stain according to the invention; Fig. 3 a first perspective view of a heel body according to the invention; Fig. 4 a second perspective view of the running stain; Fig. 5 a second perspective view of the heel body; Fig. 6 a third perspective view of the heel body; Fig. 7 a side view of a heel body according to the invention; Fig. 8 a side view of a running stain according to the invention; Fig. 9 a top view of a heel body according to the invention; Fig. 10 a top view of a running stain according to the invention; Fig. 11 a sectional view of the heel system at the level of a first connecting device; and Fig. 12 a sectional view of the heel system at the level of a second connecting device. Detailed description of implementation examples

[0054] Fig. Figure 1 shows a heel system 1 according to the invention, comprising a heel body 2 and a tread 3 in the connected state. The heel body 2 is designed to be connected to a shoe at its upper surface 26. The tread 3 has an exemplary profiled underside 29 on the side opposite the heel body 2.

[0055] As a reference, the direction of travel 22 is symbolized by a dashed arrow extending from a rear edge 23 of the heel system 1 towards a shoe tip not shown.

[0056] The heel body 2 and the running surface 3 each have a flank 28, 31 located between the upper surface 26 of the heel body 2 and the lower surface 29 of the running surface 3. The flanks 28, 31 each have four sides: a front surface 32, a back surface 33, and two wing surfaces 34, 35. The boundary between the front surface 32 and the wing surfaces 34, 35 is defined by the two intervening edges.

[0057] The transition from the wing sides 34, 35 to the rear side 33 can also be defined by edges or, as in Fig. As shown in example 1, the heel system 1 is typically rounded at the rear end. In such cases, the rear side 33 is specifically the side that extends forward from the rear edge 23 over approximately one-third of the length of the heel system 1 in the direction of travel 22; see also Fig. 7 and Fig. 8, in which a rear connection area is shown over a length b of one-third of the total length a+b. In the in Fig. In the example shown, the boundary between the wing side 34 and the rear side 33 coincides with the step formed by the separation joint between the heel body 2 and the running patch 1.

[0058] Fig. Figure 2 shows the running surface 3 according to the invention in its unconnected state. It can be seen that the rear side 33 of the running surface 3 is higher than the wing sides 34, 35 and the front side 32. This compensates for the material abrasion that typically occurs more frequently in the rear area during use. In contrast, the front area of ​​the running surface 3 according to the invention can be relatively thin, so that this material distribution means that significantly less material is required to manufacture the running surface 3 than with conventional running surfaces. This leads to improved cost-efficiency and sustainability.

[0059] The in Fig. The heel body 2 shown in Figure 3 has a portion of a first connecting device 4, which comprises a plurality of connecting elements 5. The portion of the connecting elements 5 associated with the heel body 2 is formed by studs 19 that extend substantially perpendicularly from a base surface of a lower surface 27 of the heel body 2. The studs 19 are arranged uniformly in the front region of the heel body 2, with a number of 10 to 100 studs 19 proving advantageous, depending on the shoe size and the required load-bearing capacity of the connection. 30 to 60 and especially 40 to 50 studs 19 are particularly suitable. The heel body 2 shown is dimensioned approximately for shoe size EU 44-46 and has 47 studs 19, with the studs 19 having a diameter of approximately 7 mm. When dimensioning for other shoe sizes, the stud diameter can be varied. Alternatively or additionally, rows of studs can be omitted or added.

[0060] Furthermore, it shows Fig. 3 several first spacers 6 which are in the Fig. 5 and Fig. 6 are more easily recognizable due to the changed perspective. The first spacers 6 are arranged between the studs 19 and, in the connected state, lie with their end face against the opposite base surface of a top surface 30 of the running surface 3 (see Fig. 4) so ​​that a first cavity 9 exists between the studs 19 (see Fig. 11) is trained.

[0061] Fig. Figure 3 further shows a second spacer 7 that surrounds the first connection direction 4 on four sides. In the example shown, the second spacer 7 is formed by a web that transitions on one side into a surface 36 that is raised compared to the base surface of the underside 27. In the connected state, the second spacer 7 rests against the opposite base surface of the top surface 30 of the running patch 3, so that a second cavity 11 is formed (see Fig. 11), which surrounds a part of the connecting elements 5, namely the studs 19, of the first connecting device 4 in the example shown on all four sides. As shown Fig. As can be seen in Figure 6, the connecting elements 5 can be arranged so far in the direction of the flank 28 that the second cavity 11 is interrupted by the connecting elements 5 in the edge area.

[0062] Both the first and the second cavities 9 and 11 form a cavity according to the invention because both surround a part of one of the connecting elements 5, namely the studs 19, on at least two sides. In this embodiment, the first and the second cavities 9, 11 are connected to each other so that they form a continuous inner cavity 9, 11.

[0063] Furthermore, it shows Fig. 3 a first sealing element 16, which extends in the form of a lip along both wing sides 34, 35 and the front 32. The sealing element 16 terminates with a sealing edge 37 and simultaneously forms part of the flank 28. Through the sealing edge 37, which in the connected state is attached to a Fig. 4, where the chamfered chamfer 18 of the running surface 3 is in contact with the surface, a seal can be created between the inner cavity 9, 11 and the outside, so that a large proportion of foreign particles and / or liquid are prevented from penetrating into the interior of the drop system 1 by the first sealing element 16.

[0064] Finally, it shows Fig. 3 a part of a second connecting device 21, which is arranged in the rear third of the heel system 1. The part of the second connecting device 21 associated with the heel body 2 is formed by an undercut 24. The part of the second connecting device 21 associated with the tread 3 is formed by an undercut recess 25, into which the undercut 24 engages in the connected state, so that a positive-locking connection is created.

[0065] Fig. Figure 4 shows the running surface 3 with part of the first connecting device 4, which is formed by receptacles 20. The receptacles 20 are shaped to correspond to the studs 19 and are arranged such that the studs 19 can engage in the receptacles 20 and thereby create a force-fit and / or friction-fit connection.

[0066] Furthermore, it shows Fig. 4 the undercut receptacle 25, into which the undercut 24 engages, so that in addition to the force-fit and / or friction-fit connection through the first connecting device 4 between heel body 2 and running surface 3 a form-fit connection is created simultaneously.

[0067] Furthermore, in Fig. Figure 4 shows a third spacer 8, which is arranged between the first and second connecting devices 4, 21. The third spacer 8 is formed as a raised portion of the surface 38, which is lowered relative to the base of the upper surface 30 and extends transversely to the direction of travel 22. In the connected state, the third spacer 8 rests against the raised surface 36 of the shoulder body 2, so that a further cavity 12 exists between the raised surface 36 and the lowered surface 38 (see Figure 4). Fig. 12). The third spacer 8 is not necessarily required to form the cavity; however, it can also advantageously stabilize the cavity 12 when the heel system 1 is under load as a result of the rolling motion during walking.

[0068] Fig. Figure 4 shows a second sealing element 17, which terminates in the form of a lip with a final sealing edge 39. The second sealing element 17 transitions into the chamfered chamfer 18. Together with the first sealing lip 16, the second sealing lip 17 forms a tube-like third cavity 15 in the shoulder system 1 (see Fig. 11), which surrounds all the studs 19 of the first connecting device 4 on three sides. Thus, the cavity 15 is also a cavity according to the invention.

[0069] The Fig. 5 and Fig. Figure 6 shows the heel body 2, as already seen from the Fig. 3 is known. Due to the changed perspectives, the first spacers 6 are more clearly visible. The spacers 6 are preferably shaped as point-like or knob-like projections on the base surface of the underside 27. Advantageously, several first spacers 6 are evenly distributed between the connecting elements 5, with six first spacers 6 in the present example. In this way, an inner cavity 9 is formed that surrounds the connecting elements 5. Furthermore, in the Fig. 5 and Fig. 6 can be seen that the studs 19 have a star-shaped cross-section, whereby, according to the invention, the contact area between the studs 19 and the receptacles 20 is increased and an improved connection between the running surface 3 and the heel body 2 is achieved.

[0070] Fig. Figure 7 shows an example of the division of the heel body 2 into a front connection area and a rear connection area, wherein the front connection area extends over a length a of, for example, two-thirds of the total length a+b, and the rear connection area accordingly extends over a length b of, for example, one-third of the total length a+b. According to this division, the first connection device 4 is preferably arranged exclusively in the front two-thirds, and the second connection device 21 exclusively in the rear third.

[0071] The first connecting device 4 comprises rows of studs 19a, 19b, 19c, wherein the height of the studs 19a, 19b, 19c changes along the direction of travel 22. Preferably, the height of the studs 19a, 19b, 19c increases in the direction of travel 22. More preferably, a front part of the rows of studs 19a to 19b can have a constant height; a rear part of the rows of studs 19b to 19c then has an increasing height in the direction of travel 22.

[0072] The increasing height of the studs 19a, 19b, 19c facilitates easier attachment of the tread 3 to the heel body 2. During assembly, the undercut receptacle 25 of the second connecting element 21 is first slid over the undercut 24 in the direction of travel 22, whereby the front connecting area of ​​the tread 3 is advantageously pushed slightly away from the studs 19a, 19b, 19c. The lower height of the studs 19c located near the second connecting element 21 simplifies the sliding process, as it reduces the likelihood of tilting between the tread 3 and the heel body 2.After the undercut 24 has been inserted into the undercut receptacle 25, the underside 29 of the tread 3 is pressed towards the studs 19a, 19b, 19c. It is particularly advantageous to press the lower studs 19c and then the higher studs 19a to 19b into the receptacles 20 against a frictional force, starting from the rear connection area in the direction of travel 22. This can be achieved, for example, by the wearer's own weight when the shoe is on. The tread 3 is then securely attached to the heel body 2, since to release the second connection 21, the undercut receptacle 25 must be pulled out of the undercut 24 against the direction of travel 22. This is not possible without deliberate intervention due to the engagement of the studs 19a, 19b, 19c in the receptacles 20.The removal of the running patch 3 then takes place in reverse order, whereby in practice it has been shown that the removal of the studs 19 from the receptacles 20 can be done manually without tools.

[0073] Preferably, the depth of the recesses 20 is also adapted to the changing height of the studs 19a, 19b, 19c; further preferably, the depth of the recesses 20 is adapted such that a further cavity 10 exists between the end face of the studs 19a, 19b, 19c and the bottom of the recesses 20 (see Fig. 11) is present. If, during the assembly process, the connection was initially made via the second connecting device 21, it may be necessary to guide the studs 19a, 19b, 19c slightly diagonally into the receptacles 20. To simplify this, it is advantageous if – as in Fig. 7 shown - a chamfer is provided between the lateral surface of the studs 19a, 19b, 19c and the end face.

[0074] Fig. Figure 8 shows a side view of the running surface 3. Here, too, the second connecting element 21 occupies the rear connecting area with a length b of, for example, one-third of the total length a+b; accordingly, the front connecting area has a length a of, for example, two-thirds of the total length a+b. It is clearly visible that the second sealing element 17 transitions into the outwardly leading chamfer 18. The slope of the chamfer 18 is shallower than that of the second sealing element 17. In this way, liquid and foreign particles are efficiently captured in the edge region of the running surface 3 and discharged from the settling system 1 by means of gravity.

[0075] Fig. Figure 9 shows the heel body 2 according to the embodiment in the Fig. 1, Fig. 3, Fig. 5, Fig. 6 and Fig. 7 in the top view. Fig. Figure 10 shows the running stain 3 according to the embodiment already shown in the Fig. 1, Fig. 2, Fig. 4, and Fig. 8 is known in a top view. In addition, the section axes AA and BB were added to both figures, which correspond to the assignment of section AA in Fig. 11 and BB in Fig. 12 serve. It should be noted that the sections AA and BB shown are in the Fig. 11 and Fig. 12 show a section of the heel system 1 in the connected state.

[0076] Fig. Figure 9 shows that in a transition area between the second connecting device 21 and the first connecting device 4, the undercut 24 has a projection 41. This projection 41, to which the undercut receptacle 25 is also adapted accordingly, increases the degree of undercut between the undercut 24 and the undercut receptacle 25 and reinforces the second connecting device 21 in this area. This ensures that the particularly strong forces acting in this area during the rolling motion can be reliably absorbed.

[0077] Furthermore, in the Fig. 9 and Fig. It can be seen that the studs 19 are oriented such that a protrusion or tooth of the star-shaped stud 19 always corresponds to a recess between two teeth of the adjacent stud 19. This means that successive studs 19 or receptacles 20 in the longitudinal and transverse directions are each rotated 90° relative to one another. This special arrangement results in a high packing density of the connecting elements 5 in the front connection area and a particularly effective force-fit or frictional connection.

[0078] Fig. Figure 11 shows the section AA through the front connection area of ​​the heel system 1 with the first connection device 4, from which the cavities 9, 11 and 15 according to the invention are particularly evident. The first cavity 9 is formed by the first spacer 6. The second spacer 7 forms a second circumferential cavity 11. In this example, the plurality of first spacers 6 and the second spacer 7 are arranged such that a continuous inner cavity 9, 11 is formed.

[0079] The third cavity 15 is arranged between the first sealing element 16 and the second sealing element 17; this can be achieved, in particular, by a corresponding contour of the shoulder body 2 in the contact area of ​​the second sealing element 17, which is recessed relative to the base surface of the underside 27 of the shoulder body 2. The second sealing element 17 rests with an inner surface against an outer surface of the second spacer element 7, which is designed as a web. This type of arrangement allows for a particularly reliable seal of the third cavity 15 against the inwardly adjoining cavities 9 and 11 by the second sealing element 17. The first and second sealing elements 16, 17 preferably have a sharp sealing edge 37, 39.

[0080] The chamfer 18 creates an outer slope of the tread 3 towards the flank 31, which makes it more difficult for foreign particles and liquids to penetrate by gravity. At the same time, foreign substances that have entered the cavity 15 are efficiently channeled out via the chamfer 18. The outer slope of the chamfer 18 extends at a height c, which is preferably less than half and more than 1 / 3 of the total height of the drop system 1.

[0081] Furthermore, the additional cavity 10 can be seen, which is provided between the front surface of the studs 19 and the bottom of the receptacles 20.

[0082] Fig. Figure 12 shows section BB through the rear connection area of ​​the heel system 1 with the second connection device 21. The third spacer 8 creates a further cavity 12 between the raised surface 36 (see Fig. 3) and the lowered area 38 (see Fig. 4) is formed. Furthermore, it can be seen how the undercut 24 of the heel body 2 is held in the undercut receptacle 25 of the running surface 3. The undercut receptacle 25 is designed such that a further cavity 13 is also formed between the end face of the undercut 24 and the undercut receptacle 25. Furthermore, the heel body 2 is designed relative to a surrounding section 40 of the undercut receptacle 25 such that a further cavity 14 is formed between this surrounding section 40 and the heel body 2. The cavities 13, 14, like the other cavities, serve to collect any penetrating foreign particles in a controlled manner and to arrange them in designated positions so that they cannot negatively affect either the first and / or second connecting device 4, 21 or the fitting geometry of the heel system 1.

[0083] From the Fig. 11 and Fig.Finally, it is also evident from 12 that the heel body 2 and the running surface 3 are each formed in one piece or joined in one piece ("one-piece") and can thus be manufactured in a particularly simple and cost-effective manner.

[0084] Due to the numerous cavities 9, 10, 11, 12, 13, 14, and 15 of the heel system 1, the contact area between the heel body 2 and the tread 3 is significantly reduced compared to conventional heel systems. This, according to the invention, substantially reduces the adverse effects of penetrating foreign particles and improves the durability, stability, and wearing comfort of the heel system. These features, functions, and advantages of the present invention were not anticipated from a skilled person's perspective, as the relevant prior art has, without exception, developed in the direction of heel systems that result in the closest possible or largest possible contact area between the heel body and the tread.

[0085] The invention is not limited to the exemplary embodiments described therein. Rather, the invention encompasses every new feature as well as every combination of features, which in particular includes every combination of features in the claims, even if that feature or combination of features is not explicitly stated in the claims or the exemplary embodiments. Reference symbol list 1. Sales system 2. Heel body 3 Running stain 4 First connection device 5 Connecting element 6 First spacer 7 Second spacer 8 Third distancing device 9 First cavity 10 Cavity 11 Second cavity 12 Cavity 13 Cavity 14 Cavity 15 Third cavity 16 First sealing element 17 Second sealing element 18th phase 19 studs 20 recordings 21 Second connection device 22 Direction of travel 23 trailing edge 24 Undercut 25 Undercut shot 26 Top side (heel body) 27 Underside (heel body) 28 Flank (heel body) 29 Underside (running stain) 30 Top side (running stain) 31 Flank (running patch) 32 Front 33 Back 34 wing side 35 wing side 36 Increased area 37 Sealing edge (first sealing element) 38 Lowered area 39 Sealing edge (second sealing element) 40 Comprehensive Section 41 Cantilever

Claims

[1] A heel system (1) for a shoe with a heel body (2) that can be attached to or is attached to the shoe and a tread (3), wherein the heel body (2) is connected or connectable to the tread (3) via a first connecting device (4) which has at least one connecting element (5) and the heel body (2) and the tread (3) are designed such that at least one cavity (9, 11, 15) is formed between the heel body (2) and the tread (3) in the connected state, which surrounds at least a part of the at least one connecting element (5) on at least two sides, characterized by , that the heel body (2) and the running surface (3) each have a sealing element (16,17), wherein the sealing elements (16,17) are arranged such that a first sealing element (16) limits an outer cavity (15) to the outside and a second sealing element (17) limits the outer cavity (15) to the inside. [2] The distribution system (1) according to claim 1, characterized by , that at least one spacer means (6,7) is provided on the heel body (2) and / or on the running surface (3), which spaces the heel body (2) and the running surface (3) apart by forming at least one cavity (9,11,15). [3] The sales system (1) according to claim 2, characterized by that the first connecting device (4) has two or more connecting elements (5) and wherein the spacer means (6,7) comprises a first spacer means (6) which is arranged between at least two of the connecting elements (5) of the first connecting device (4). [4] The distribution system (1) according to claim 3, characterized by , that a plurality of first spacer means (6) are arranged between the connecting elements (5) such that a continuous inner cavity (9,11) is created which surrounds at least part of the connecting elements (5). [5] The distribution system (1) according to claim 1, characterized by , that the first sealing element (16) is assigned to the heel body (2) and the second sealing element (17) to the running surface (3). [6] The distribution system (1) according to any one of claims 1 to 5, characterized by , that the outer cavity (15) between the first sealing element (16) and the second sealing element (17) extends such that the first connecting device (4) is surrounded on two or three sides by the outer cavity (15). [7] The sales system (1) according to any one of claims 1 to 6, characterized by , that the connecting element (5) of the first connecting device (4) is formed by a stud (19) and a shape-corresponding receptacle (20), which are designed in such a way that in the connected state there is a force-fit and / or friction-fit connection between the stud (19) and the receptacle (20). [8] The sales system (1) according to claim 7, characterized by, that the stud (19) has a cross-section which is at least partially star-shaped. [9] The distribution system (1) according to claim 7 or 8, characterized by , that the stud (19) is assigned to the heel body (2) and the recess (20) to the running patch (3). [10] The distribution system (1) according to any one of claims 1 to 9, characterized by , that the first connecting device (4) is formed by a plurality of connecting elements (5) which are arranged at least sectionally distributed along a longitudinal and / or transverse direction of the shoe on the heel body (2) or the running surface (3). [11] The distribution system (1) according to claim 10, characterized by , that the connecting elements (5) have at least partially different heights from each other, the height of the connecting elements (5) decreasing towards the rear end of the heel system (1) in relation to the direction of travel (22). [12] The distribution system (1) according to any one of claims 1 to 11, characterized by , that in addition a second connecting device (21) is provided spatially separate from the first connecting device (4), which is designed as a positive locking connecting device. [13] The distribution system (1) according to claim 12, characterized by , that the first connecting device (4) is arranged in a front connecting area of ​​the heel system (1) and the second connecting device (21) is arranged in a rear connecting area of ​​the heel system (1), which is arranged in relation to the direction of travel (22) between the front connecting area and a rear edge (23) of the heel system (1) or a rear end of the shoe. [14] The distribution system (1) according to claim 12 or 13, characterized by , that the second connecting device (21) is formed by an undercut (24) and an undercut receptacle (25). [15] The distribution system (1) according to any one of claims 1 to 14, characterized by , that the heel body (2) and / or the tread (3) are formed in one piece. [16] A heel system (1) for a shoe with a heel body (2) that can be attached to or is attached to the shoe and a tread (3), wherein the heel body (2) is connected or connectable to the tread (3) via a first connecting device (4) which has at least one connecting element (5) and the heel body (2) and the tread (3) are designed such that at least one cavity (9, 11, 15) is formed between the heel body (2) and the tread (3) in the connected state, which surrounds at least a part of the at least one connecting element (5) on at least two sides, characterized by, that the first connecting device (4) is formed by a plurality of connecting elements (5) which are arranged along a longitudinal direction of the shoe at least partially distributed on the heel body (2) or the running surface (3), wherein the connecting elements (5) have at least partially different heights from one another and wherein the height of the connecting elements (5) decreases towards the rear end of the heel system (1) in relation to the running direction (22). [17] A heel body (2) with a top surface (26) facing a shoe, a bottom surface (27) facing a running surface (3) and a flank (28) arranged between the top surface (26) and the bottom surface (27), wherein at least a part of a connection system for connecting the heel body (2) to the running surface (3) is provided on the bottom surface (27), with a first connection device (4) which is designed to connect the heel body (2) to the running surface (3) in a front connection area, wherein the first connection device (4) has several connection elements (5), characterized by, that the connection system additionally has a second connection device (21) which is designed to connect the heel body (2) to the running patch (3) in a rear connection area, wherein the rear connection area is arranged in relation to the direction of travel (22) between the front connection area and a rear end of the shoe, wherein the connecting elements (5) of the first connecting device (4) are each configured to create a force-fit and / or friction-fit connection between the heel body (2) and the running surface (3) and the second connecting device (21) is configured to create a positive-fit connection between the heel body (2) and the running surface (3). [18] A running surface (3) with a profiled or profileable underside (29), an upper surface (30) facing or oriented towards a heel body (2) of a shoe, and a flank (31) arranged between the upper surface (30) and the underside (29), wherein at least a part of a connection system for connecting the running surface (3) to the heel body (2) is provided on the upper surface (30), with a first connection device (4) which is designed to connect the running surface (3) to the heel body (2) in a front connection area, wherein the first connection device (4) has several connection elements (5), characterized by, that the connection system additionally comprises a second connection device (21) which is designed to connect the running surface (3) to the heel body (2) in a rear connection area, wherein the rear connection area is arranged in relation to the direction of travel (22) between the front connection area and a rear end of the shoe, wherein the connecting elements (5) of the first connection device (4) are each configured to establish a force-fit and / or friction-fit connection between the running surface (3) and the heel body (2), and the second connection device (21) is configured to establish a positive-fit connection between the running surface (3) and the heel body (2). [19] A connection system for connecting a running surface (3) to a heel body (2) on a shoe, comprising a first connection device (4) designed to connect the running surface (3) to the heel body (2) in a front connection area, wherein the first connection device (4) has several connection elements (5), characterized by , that the connection system additionally comprises a second connection device (21) which is designed to connect the running patch (3) to the heel body (2) in a rear connection area, wherein the rear connection area is arranged between the front connection area and a rear end of the shoe in relation to the direction of travel (22), wherein the connecting elements (5) of the first connecting device (4) are each configured to create a force-fit and / or friction-fit connection between the running surface (3) and the heel body (2) and the second connecting device (21) is configured to create a form-fit connection between the running surface (3) and the heel body (2).

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