Midsole with shearing structure for shoe and method of manufacturing thereof

Abstract

To provide a sole for a shoe, the sole reducing impacts to the foot of the wearer.SOLUTION: The present disclosure relates to a sole (101) for a shoe, in particular for a sports shoe, such as a running shoe, the sole (101) comprising: a midsole (110) comprising an upper midsole layer (120) and a lower midsole layer (125), the upper midsole layer (120) and the lower midsole layer (125) being distinct from one another; and a shearing structure (130) arranged in the midsole (110). The shearing structure (130) is configured to allow a relative movement between the upper midsole layer (120) and the lower midsole layer (125).SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present disclosure relates to a sole for a shoe, in particular for a sports shoe such as a running shoe. In particular, the present disclosure relates to a sole comprising a midsole and a shear structure, the shear structure allowing relative movement between an upper midsole layer and a lower midsole layer of the sole. The present disclosure also relates to a respective shoe comprising such a sole. Furthermore, the present disclosure relates to a respective method for manufacturing a sole for a shoe. [Background technology]

[0002] Soles for shoes, particularly for sports shoes such as running shoes, are commonly known and have a variety of purposes and use cases and are becoming increasingly popular among individuals. Shoe soles generally perform several different functions to make them more appealing to individuals.

[0003] For example, shoe soles usually serve a protective purpose, for example to protect the wearer's foot from interference or obstruction by foreign objects, such as sharp or pointed objects that the wearer may step on. Furthermore, shoe soles usually facilitate the cushioning of impact forces that occur when the foot strikes the ground. The shoe sole also provides traction to avoid slipping of the wearer's foot. In addition, shoe soles generally provide some stability to the wearer's foot so that the risk of the wearer's ankle sprain or other types of injury, such as plantar fascia injury or muscle overload, can be reduced. Moreover, a further function of shoe soles, especially for performance footwear such as running shoes, is to facilitate good force transmission from the athlete's leg through the foot to the ground and an efficient running style, improving the athlete's performance. Furthermore, especially in the case of sports shoes, the athlete's foot should be sufficiently cushioned to reduce the impact and load on the athlete's joints. In addition, the shoe sole should be as light as possible to further contribute to reducing the athlete's energy consumption, which is relevant for example for long distances.

[0004] Some particularly relevant needs in this context are that, on the one hand, they should increase cushioning and stability in order to reduce the risk of injuries and make athletic activities more comfortable, and, on the other hand, they should simultaneously ensure a high energy return in order to reduce the amount of energy required by the athlete.

[0005] In this context, reference may be made to the following exemplary prior art documents:

[0006] Prior art document US 2004 / 0154188 A1 relates to a midsole for an athletic shoe that includes a hard elastic stabilizing member that extends generally around a central opening through which a relatively soft elastic cushioning layer extends downward from the center of the heel under the wearer's calcaneus to form a heel cushioning post. The stabilizing member extends along the lateral and medial sides of the post to prevent pronation and supination, and preferably includes a protrusion that conforms to a flex line in the heel region and extends into a recess in the heel cushioning post to affect the flex characteristics of the heel region of the shoe. The midsole may also include flex grooves, channels, and / or notches conforming to the flex line to promote desired flex characteristics in the heel region of the sole and to aid in decelerating the wearer's heel-to-toe gait during the stance phase of the wearer's walking cycle.

[0007] Prior art document WO 2023 / 005966 relates to a sports shoe and a midsole system, the midsole system includes a first midsole formed of a cushioning material, an outsole, where a cushioning space is formed between the first midsole and the outsole, and an elastic piece positioned in the cushioning space, the elastic piece being elastically deformable along the direction of arrangement of the first midsole and the outsole, and having a heel portion positioned in the heel region of the midsole system and a forefoot portion positioned in the forefoot region of the midsole system. The cushioning mode of the first midsole is material cushioning, and the cushioning mode of the elastic piece is structural cushioning, and during the use of the midsole system, both the first midsole and the elastic piece can absorb the impact force from the ground (the impact force along the direction of arrangement of the outsole and the first midsole), thereby effectively improving the cushioning performance and rebound performance of the midsole structure.

[0008] Prior art US Patent Application Publication No. 2022 / 0312891 relates to a sole structure including a first midsole portion, a second midsole portion disposed below the first midsole portion, and a support plate stacked between the first midsole portion and the second midsole portion, disposed at a position corresponding to at least the rear foot portion, and having a higher rigidity than the first midsole portion and the second midsole portion. The support plate includes a base portion having a wave-shaped shape including at least one peak and at least one valley, and a first support portion and a second support portion having a wave-shaped shape and branching away from each other from a peripheral portion located inside the base portion toward each of the first midsole portion and the second midsole portion. The valley of the second support portion is disposed at a position corresponding to the talus process. Further prior art is disclosed in German Patent No. 10244435, US Pat. No. 8387279, US Pat. No. 8453344, Chinese Utility Model No. 218898566, Chinese Patent Publication No. 112716098, US Patent Publication No. 2021 / 0227927, US Pat. No. 11000094, US Pat. No. 8863407, US Pat. No. 11470912, US Pat. No. 11510457, and US Pat. No. 4614046.

[0009] The proposed solutions still have some drawbacks with respect to meeting the needs identified above. For example, many of the known solutions focus on the heel strike, which requires bulky additional components for cushioning. Furthermore, these solutions do not provide optimal results in terms of energy return. Furthermore, while high performance lightweight foams may provide greater deformation and therefore cushioning, the higher energy return associated with these foams places adverse loads on the athlete's knees, etc. [Prior art documents] [Patent documents]

[0010] [Patent Document 1] US Patent Application Publication No. 2004 / 0154188 [Patent Document 2] International Publication No. 2023 / 005966 Brochure [Patent Document 3] US Patent Application Publication No. 2022 / 0312891 [Patent Document 4] German Patent No. 10244435 [Patent Document 5] U.S. Patent No. 8,387,279 [Patent Document 6] U.S. Patent No. 8,453,344 [Patent Document 7] China Utility Model No. 218898566 [Patent Document 8] China Patent Publication No. 112716098 [Patent Document 9] US Patent Application Publication No. 2021 / 0227927 [Patent Document 10] U.S. Patent No. 11000094 [Patent Document 11] U.S. Patent No. 8,863,407 [Patent Document 12] U.S. Pat. No. 1,147,0912 [Patent Document 13] U.S. Pat. No. 1,151,0457 [Patent Document 14] U.S. Pat. No. 4,614,046 Summary of the Invention

[0011] Against this background, it is an object of the present invention to provide an improved shoe sole, which at least partially overcomes the drawbacks of the prior art. In particular, it is an object of the present invention to provide a shoe sole which allows for improved cushioning and attenuates impacts on the wearer's foot. A general object is to reduce the risk of injury. A further object is to provide a method for manufacturing such a shoe sole. A general object is to reduce the costs of providing such a shoe sole.

[0012] The above mentioned objects are achieved at least in part by the subject matter of the independent claims. Preferred embodiments are the subject matter of the dependent claims, and other suitable aspects of the invention are described throughout the disclosure of this application.

[0013] Shoe soles In one aspect the object is solved by a sole for a shoe, in particular a sports shoe such as a running shoe, the sole comprising a midsole comprising an upper midsole layer and a lower midsole layer, the upper midsole layer and the lower midsole layer being at least partially separate from one another, and a shear structure arranged in the midsole, the shear structure being configured to enable relative movements between the upper midsole layer and the lower midsole layer.

[0014] Thus, the sole for a shoe, in particular for a sports shoe, facilitates improved cushioning for the wearer, which is useful for any kind of athletic activity. At the same time, a sufficient energy return can be realized, but not to the extent that it may adversely affect the running experience. The improved cushioning reduces the load and impact on the wearer's joints, which can significantly reduce the risk of injury. For example, the impact on the knee and ankle joints can be reduced, which is important, for example, during downhill running. In addition, muscle damage or muscle fatigue can be reduced, since the overall impact can be attenuated. Thus, the wearer can perform any athletic activity for a longer period of time and / or with better results. This advantage has been found to be particularly noticeable at and / or after the initial ground contact of the sole. This can reduce forces, in particular horizontal forces. Overall, this can reduce kinetic energy, as described elsewhere herein. Without wishing to be bound by theory, it is believed that the advancement of the shoe sole proposed herein is based in particular on the following principles: The relative movement of the upper midsole layer and the lower midsole layer allows the upper midsole layer and the lower midsole layer to slide against each other. Such sliding can result in frictional forces acting against the direction of the sliding motion. For example, the force due to sliding friction can act against the direction of the sliding motion. Sliding friction can generally be referred to as solid friction.

[0015] The sliding friction can include static friction, rolling friction, and / or kinetic friction. Thus, some relative movement is possible with the shear structure, but at the same time, the degree of relative movement can be controlled. The relative movement itself can cause some delay in the force acting on the wearer's foot and thereby on the wearer's joints and / or muscles. Such delay can reduce the peak force acting on the wearer's foot and thereby on the wearer's joints and / or muscles. This reduces the overall impact on the wearer. At the same time, the frictional force also contributes to a "softer" feel when the wearer's foot contacts the ground. This entails improved cushioning and damped loads on the wearer. The shear structure may in some cases be able to reduce horizontal forces resulting from the relative movement. This can mean that the shear structure is configured to damp horizontal forces. In such an example, the shear structure can be referred to as a horizontal force damping structure. However, the shear structure is not limited to reducing horizontal forces. For example, forces acting in any kind of direction can be damped, for example forces acting generally parallel to a vertical axis, such as upward and / or downward. As will be appreciated by those skilled in the art, combinations of force vectors can also be damped. Overall, the relative movement can contribute to a reduction in kinetic energy, which improves the cushioning effect. This can reduce the load on the joints of the wearer, making the shoe more comfortable to wear, for example, while running.

[0016] Next to the sliding friction caused by the relative movement, the relative movement can also provide internal friction. The internal friction can be understood as friction within the material of the midsole, including the upper midsole layer and the lower midsole layer. Without wishing to be bound by theory, it is believed that the internal friction can be caused by the toughness of the material of the midsole, including the upper midsole layer and the lower midsole layer, etc. For example, the relative movement can cause deformation of the upper midsole layer and / or the lower midsole layer. Such deformation can cause internal friction. This can also contribute to the reduction of kinetic energy, improving the cushioning effect, as described elsewhere herein.

[0017] Frictional forces, especially those due to the relative movement between the upper and lower midsole layers, can generate heat. This friction helps to reduce kinetic energy, along with other benefits related to kinetic energy, especially as mentioned above. This can be important, for example, during downhill running. Nevertheless, it is also important for any other type of athletic activity.

[0018] In many prior art solutions, high performance foams are typically used, which have weak areas so that deformation can occur. However, such foams still provide a fairly high energy return, which can negatively affect the forces on the wearer's joints. The inventors have found a way to overcome these problems with shoe soles, especially those caused by the shear structure described herein.

[0019] The term "midsole" as used in this disclosure may refer to a layer of material that may be located between the outsole of a shoe, e.g., the bottom part of the sole that contacts the ground, and the upper of the shoe, e.g., the portion of the shoe that covers the top of the wearer's foot.

[0020] As used herein, the upper midsole layer and the lower midsole layer being at least partially "separate from each other" may be understood to at least partially represent two separate entities that may be separate, different, and / or distinguishable from each other. This may imply that there are at least partially differences in terms of properties, qualities, and / or functions that may distinguish the upper midsole layer and the lower midsole layer from each other. These differences may be easily noticeable to a person skilled in the art. In one example, the upper midsole layer and the lower midsole layer may be unique to some extent. However, it may still be possible that the upper midsole layer and the lower midsole layer may not always be distinguishable from each other from mere visual inspection to the extent that the upper midsole layer and the lower midsole layer may be distinguishable from each other in terms of functions. Furthermore, the upper midsole layer and the lower midsole layer being at least partially "separate from each other" may not exclude that they are made of the same material and / or are at least partially attached to each other. Additionally, it is not excluded that the upper and lower midsole layers are integrally formed, so long as they may be distinguishable from one another. Furthermore, since the upper and lower midsole layers are "at least partially" separate from one another, this can include being partially attached to one another and / or being at least partially integrally formed.

[0021] The term "shear structure" as used herein may be understood as being provided with a structure that facilitates shearing. It is noted that the shear structure may not be limited in size to provide the advances described herein. Nevertheless, one skilled in the art may recognize the shear structure as such without the required research effort. This is implied by the term "structure". For example, the shear structure may be understood to be of macroscopic size. The shear structure may not be merely an impurity and / or merely a microscopic gas inclusion in a material such as a foam of the midsole. The latter example may occur unintentionally and may not represent a shear structure. The shear structure is understood to be specifically provided with the intention of substantially enabling relative movement between the upper midsole layer and the lower midsole layer. Furthermore, the shear structure may be recognizable as enabling such a function. Such recognition may be made from a visual and / or functional standpoint. For example, the shear structure may be visible and / or may be distinguished from other portions by the functions described herein.

[0022] The term "shear" as used herein can be understood as two or more elements, parts, components, layers, etc. of a body, for example, two contacting parts of a body, sliding relative to each other. As understood in the context of this disclosure, the two elements, parts, components, layers, etc. may be an upper midsole layer and a lower midsole layer. The term shear can mean that the upper midsole layer and the lower midsole layer slide in opposite directions. Furthermore, the upper midsole layer and the lower midsole layer can slide relative to each other in a direction parallel to the plane of contact or intended contact or the plane between the two layers when the two layers are spaced apart from each other. The upper midsole layer and the lower midsole layer can slide in the same direction, but to different degrees. It is possible for the two layers to be in contact with each other, but it is fully encompassed that there is a space between the two layers while the two layers slide relative to each other. The space may be at least partially filled with a shear structure. Shear can be caused by action or stress resulting from an applied force, such as a force due to the load of the wearer. The relative movement can occur under a pressure load on the sole. It should be noted that the shearing may occur in any kind of direction, preferably approximately parallel to the heel-toe axis of the sole.

[0023] The term "structure" as used herein can be understood to have a physical extension. For example, it can be recognizable as a structure by a person skilled in the art and / or can be touched by a person skilled in the art. The structure can be provided by any kind of means, such as a mechanical element, a space, a part or material of the upper midsole layer and / or the lower midsole layer, etc.

[0024] The term "relative movement" as used herein can be understood as a movement that may be discernible by a person skilled in the art without the effort of investigation during normal use of the shoe sole. The relative movement is understood to be a deliberate movement. Thus, a relative movement at a microscopic level may not be sufficient to be called having a relative movement within the meaning of the present disclosure. Furthermore, since the upper midsole layer and the lower midsole layer are at least partially separate from each other, the relative movement is discernible in that the layers may be sliding relative to each other. For example, a distance such as an inward and / or outward distance is discernible. The direction of this sliding is not limited to a specific direction, and all directions in space are encompassed by the present disclosure.

[0025] It should be noted that the term "upper" in the phrase "upper midsole layer" does not limit the term "midsole layer" itself. In particular, it does not mean that the "upper midsole layer" is necessarily disposed above something. The same applies to the term "lower" in the phrase "lower midsole layer". However, as detailed elsewhere herein, the understanding that the upper midsole layer is disposed above the lower midsole layer may help to explain preferred embodiments of the first aspect of the present disclosure in more detail.

[0026] The shoe sole described herein may be particularly useful when combined with and / or applied to sports shoes, such as running shoes, particularly long distance running shoes. However, it should be noted that the sole may be used with any type of footwear, including but not limited to football shoes, hiking boots, sneakers, basketball shoes, rugby shoes, baseball shoes, golf shoes, tennis shoes, and cross-training shoes. Furthermore, the sole may be used with shoes for any type of athletic activity.

[0027] The term "athletic activity" should be understood to include at least one or more and / or any combination of the following non-exhaustive list: aerobics, athletic training, running, hiking, mountain climbing, group fitness classes, walking, cycling, yoga, soccer, tennis, football, basketball, exercise, volleyball, gymnastics, weightlifting, cross training, baseball, softball, rugby, field hockey, wrestling, squash, track and field (sprinting, long jump, high jump, etc.), cross country skiing, golf, lacrosse, and triathlon.

[0028] Furthermore, the shear structures providing the advantages described herein may additionally or alternatively be used in any type of device used in athletic activities. That is, the shear structures are not necessarily limited to the example of shoe soles. It may be feasible to transfer the shear structure concept to any type of activity or athletic activity that requires stability, comfort, force attenuation, or generally some kind of improved support and / or feel to the wearer.

[0029] Nonetheless, the advantages of the shear structures described herein have been found to be particularly pronounced when applied to soles for shoes, such as shoes used during athletic activities.

[0030] As used herein, the term "wearer" may be any type of person capable of wearing an article of footwear. The term "wearer" may be used synonymously with terms such as "user," "athlete," "human," "individual," "person," and the like.

[0031] Direction of movement and position of structures In preferred embodiments of the soles for shoes described herein, the relative movement between the upper and lower midsole layers occurs within a plane defined by the medial-lateral axis of the sole and the heel-toe axis of the sole, and preferably the relative movement between the upper and lower midsole layers is generally parallel to the heel-toe axis of the sole.

[0032] This can have the advantage that horizontal forces can be attenuated by the shear structure, which can be advantageous because the forces exerted by the shear structure are then not directed directly at the core of the wearer's body, which can therefore have the advantage of reducing shock to joints and / or muscles.

[0033] It should be noted that horizontal forces may result from relative movement between the upper and lower midsole layers during initial contact of the sole with the ground.

[0034] When the relative movement between the upper and lower midsole layers is approximately parallel to the heel-toe axis of the sole, this can have the additional advantage that the movement parallel to the medial-lateral axis of the sole is reduced and / or approximately zero. This helps to provide stability to the wearer's foot. It is particularly advantageous that shear movement can provide frictional forces that lead to the generation of heat and help reduce kinetic energy. This can be particularly important during, for example, downhill running. Nevertheless, this is also important in any other type of athletic activity.

[0035] In preferred embodiments of the soles for shoes described herein, the shear structure is configured to permit relative movement between the upper and lower midsole layers in at least one of the forefoot, midfoot, rearfoot, lateral, and medial portions of the midsole, preferably in at least one of the forefoot and midfoot portions of the midsole, such as the lateral forefoot, medial forefoot, lateral midfoot, and medial midfoot portions of the midsole, and most preferably in at least one of the lateral forefoot and lateral midfoot portions of the midsole.

[0036] This can have the advantage that the force attenuation can be particularly pronounced in the portion defined in this embodiment. It has been found that the prior art sometimes focuses on the rear foot portion of the midsole to claim improved cushioning, while the rest of the midsole portion is often neglected or of little interest. This drawback can be well resolved according to the present disclosure. The advantage of the sole of the present disclosure can be particularly pronounced in downhill running. This is because the gait cycle during such downhill running may be different from flat running and / or uphill running. For example, during downhill running, mainly the forefoot may contact the ground first. Thereby, providing a shear structure in the forefoot and / or midfoot may be particularly advantageous.

[0037] It has been found that arranging the shear structure configured such that the relative movement between the upper midsole layer and the lower midsole layer occurs in the lateral forefoot generally contributes to further flexibility of the shoe sole. For example, some of the remaining parts of the midsole generally can be equipped with further functional elements and / or features. The other functional elements can be, for example, sole plates as described elsewhere herein. Thereby, all these functions can work together to provide a combined advantageous effect. In addition, the manufacture of the shear structure in the lateral forefoot can be performed in a simple manner.

[0038] However, as described in this embodiment, the shear structures are not limited to the lateral forefoot. Rather, the shear structures can be located in any other portion of the midsole. In one example, multiple shear structures can be located in the midsole to provide combined beneficial effects that contribute to further attenuating forces on the wearer's body.

[0039] In one example, when a shear structure is configured to enable relative movement between the upper midsole layer and the lower midsole layer in any one of the portions defined herein, the shear structure itself may also be disposed in the respective portion.

[0040] In a preferred example, the relative movement means that the upper midsole layer moves further from the heel of the midsole in a direction generally parallel to the heel-toe axis toward the toes of the midsole compared to the lower midsole layer, hi another example, the relative movement means that the lower midsole layer moves further from the heel of the midsole in a direction generally parallel to the heel-toe axis toward the toes of the midsole compared to the upper midsole layer.

[0041] Forming and Engaging Structures In a preferred embodiment of the sole for a shoe described herein, the shear structure includes an upper shear structure of an upper midsole layer and a lower shear structure of a lower midsole layer, the upper shear structure and the lower shear structure facing each other, and the upper shear structure and the lower shear structure are preferably located in the forefoot portion of the midsole and / or the midfoot portion of the midsole, and most preferably in the lateral forefoot portion of the midsole and / or the lateral midfoot portion of the midsole.

[0042] This can have the advantage that the function of the shear structure can be at least partially divided into at least two structures, namely an upper shear structure and a lower shear structure. Nevertheless, as described elsewhere herein, the upper midsole layer and the lower midsole layer may simply be partially separate from each other. Thus, the upper midsole layer and the lower midsole layer can be attached to each other and / or at least partially formed integrally. Thus, the two shear structures can have increased flexibility. For example, the upper midsole layer and the lower midsole layer can each have a specially designed structure during manufacture that, when assembled, allows the upper midsole layer and the lower midsole layer to exhibit the advantages described herein.

[0043] As one of ordinary skill in the art would understand, the same applies to the terms "upper shear structure" and "lower shear structure" as described elsewhere herein with respect to the term "structure." That is, these terms can mean that the respective structures can have physical extensions. Furthermore, these terms can be recognizable as structures and / or accessible by one of ordinary skill in the art.

[0044] Although possible, the upper and lower shear structures facing each other does not mean that the upper and lower shear structures are in contact with each other, rather, it simply means that the upper and lower shear structures are directed toward each other, which can further contribute to the benefits with regard to the damping effect, as described elsewhere herein.

[0045] The term "upper" in the phrase "upper shear structure" does not limit the term upper shear structure itself. In particular, it does not mean that the "upper shear structure" is disposed on the upper or lower surface of an upper midsole or the like. Rather, the term "upper" in this context is used simply to indicate that the "upper shear structure" is comprised by an upper midsole layer.

[0046] In preferred embodiments of the sole for a shoe described herein, the upper shear structure and the lower shear structure at least partially engage with each other.

[0047] "Engage" may be understood as to be accommodated and / or received.

[0048] This has the advantage that the upper and lower shear structures can be easily assembled to provide a rigid construction that, although possible, does not necessarily require any separate means for attachment such as fasteners, adhesives, etc. The arrangement can therefore be considered to be at least partially self-supporting.

[0049] Such engagement may allow the upper and lower shear structures to interact with each other and / or at least partially contact each other. Movements such as shearing can thereby increase friction between the upper and lower shear structures, generating heat and subsequently reducing kinetic energy. It is noted that many of the prior art cushioning elements are limited solely to the principle of deformation of parts of the sole. This limitation is overcome by the shear structures, and in particular the upper and lower shear structures proposed herein. The reduction in kinetic energy may then allow damping, reducing loads on the wearer's joints, thereby reducing muscle damage and fatigue.

[0050] In a preferred embodiment of the shoe sole described herein, the upper shear structure and the lower shear structure are molded in general correspondence with one another.

[0051] This contributes to the shear movement of the upper and lower shear structures, which in turn may facilitate at least partial engagement of the upper and lower shear structures with one another.

[0052] "Substantially shaped to one another" can mean that the upper shear structure may have protrusions or the like that can engage recesses in the lower shear structure, and / or vice versa. However, alternatively or in addition, substantially shaped to one another can mean that the upper and lower shear structures can have substantially the same surface area, the same shape that fits with one another, or similar surface structures that can engage with one another.

[0053] In a preferred embodiment of the sole for a shoe described herein, the upper shear structure and the lower shear structure engage one another via a form-fitting connection.

[0054] A "form-fit connection" may be understood to mean that the upper and lower shear structures may be shaped or designed to fit together. This may result in improved engagement without the need for additional fasteners or adhesives. The engagement may be based on the geometry of the upper and lower shear structures. Nevertheless, it should be noted that the form-fit connection simply refers to the geometry of the upper and lower shear structures. In particular, a form-fit connection should not be confused with a rigid connection. Rather, as described in more detail elsewhere herein, the shear movement of the upper and lower midsole layers is fully encompassed by the form-fit connection.

[0055] Such a form-fit connection allows for easy assembly of the upper and lower shear structures, greatly reducing labor and manufacturing costs.

[0056] The form-fit connection can be understood as a one-to-one correspondence in one example. It should be noted that the form-fit connection may not preclude any deformation of the upper midsole layer and / or the lower midsole layer. Such deformation may be particularly appreciated, as described elsewhere herein. Furthermore, the form-fit connection may not preclude any shear movement of the upper midsole layer and / or the lower midsole layer. Such shear movement may be particularly appreciated, as described elsewhere herein.

[0057] It should be noted that the use of additional means for attaching the upper and lower shear structures, such as fasteners, adhesives, etc., may not necessarily be precluded by merely engaging or form-fitting arrangements, In one example, additional means for attaching the upper and lower shear structures, such as fasteners, adhesives, etc., are provided.

[0058] In preferred embodiments of the soles for shoes described herein, the upper shear structure is integrally formed with the upper midsole layer and the lower shear structure is integrally formed with the lower midsole layer.

[0059] This may be understood as the upper shear structure and the upper midsole layer being formed as one unitary piece, and the lower shear structure and the lower midsole layer being formed as one unitary piece, such that the upper shear structure and the upper midsole layer are not separate pieces, but may form one upper midsole layer, and the lower shear structure and the lower midsole layer are not separate pieces, but may form one lower midsole layer.

[0060] This allows for reduced manufacturing effort and cost savings, which is appreciated when manufacturing shoe soles for mass production.

[0061] Construction details / protrusions In preferred embodiments of the shoe sole described herein, the upper shear structure includes one or more upper protrusions and the lower shear structure includes one or more lower recesses, and / or the lower shear structure includes one or more lower protrusions and the upper shear structure includes one or more upper recesses.

[0062] This can have the advantage that the upper and lower shear structures can interact with each other. For example, one or more upper protrusions of the upper shear structure can interact with one or more lower recesses of the lower shear structure. Similarly, one or more lower protrusions of the lower shear structure can interact with one or more upper recesses of the upper shear structure. This can help to allow relative movement between the upper and lower midsole layers while controlling this relative movement to some degree.

[0063] One or more protrusions referred to herein (herein, for the sole purpose of brevity, a protrusion may be described without the prefixes "upper" and / or "lower", and one skilled in the art will understand that the description may refer to both protrusions) may be understood as extending from a surface or object. The term protrusion may be used to describe any part of an object or structure that protrudes, projects, or extends beyond a surrounding surface or boundary. In one example, a protrusion may be a three-dimensional extension or protrusion that extends outward from a surface or object. Protrusions may be provided in a variety of sizes. The size, shape, etc. of a protrusion may vary depending on the intended purpose and / or desired result. Nearly all technically meaningful sizes and shapes may be encompassed by the present disclosure.

[0064] The projections described herein can provide structural advantages and / or provide more specific functionality, particularly in the context of cushioning. In addition, the projections can contribute to a visual appearance and indicate to the wearer where a particular functionality is provided on the sole.

[0065] One or more recesses referred to herein (herein, merely for brevity, a recess may be described without the prefixes "upper" or "lower," and one of ordinary skill in the art will understand that the description may refer to both recesses) may be a hollow or recessed area or space recessed or engraved into a surface, structure, object, etc. A recess may essentially be the opposite of a protrusion. A recess may serve a variety of functions, as described in more detail elsewhere herein.

[0066] The term "upper" in the phrase "upper projection" does not limit the term projection itself. In particular, it does not mean that the "upper projection" is disposed on an upper surface or a lower surface, etc. Rather, the term "upper" in this context is used simply to indicate that the "upper projection" is comprised by an upper shear structure.

[0067] Similarly, the term "lower" in the phrase "lower recess" does not limit the term recess itself. In particular, it does not mean that the "lower recess" is located on a lower surface or an upper surface, etc. Rather, the term "lower" in this context is used simply to indicate that the "lower recess" is constituted by a lower shear structure.

[0068] The term "lower" in the phrase "lower protrusion" does not limit the term protrusion itself. Rather, the term "lower" in this context is used simply to indicate that the "lower protrusion" is comprised of a lower shear structure.

[0069] Similarly, the term "top" in the phrase "top recess" does not limit the term recess itself. In particular, it does not mean that the "top recess" is located on a top surface or a bottom surface, etc. Rather, the term "top" in this context is used simply to indicate that the "top recess" is constituted by an upper shear structure.

[0070] In preferred embodiments of the sole for a shoe described herein, one or more upper projections are at least partially received in one or more lower recesses and / or one or more lower projections are at least partially received in one or more upper recesses.

[0071] This can have the advantage that the projections and recesses facilitate control of movement, which can help reduce the loads that occur during the contact of the sole with the ground. This may be true to a certain extent. As described elsewhere herein, the projections and recesses can provide a clear stop along the heel-toe axis of the sole. Such a clear stop can prevent shear movement. This can reduce the overall impact on the wearer's joints and / or muscles, while at the same time improving safety due to the clear stop. This makes shoes with such soles more comfortable and safe to wear, which is particularly noticeable during athletic activities such as running.

[0072] The term "accommodated" may mean that each projection and recess is adapted to fit or match the shape and / or space of each other projection and recess.

[0073] In preferred embodiments of the sole for a shoe described herein, the one or more upper projections and / or the one or more lower projections are spaced apart from one another when viewed in the horizontal plane of the sole, preferably when viewed along the heel-toe axis of the sole.

[0074] This can have the advantage that the relative movement between the upper and lower midsole layers can be enhanced. For example, the space thus provided between the projections can be empty or filled, allowing for high flexibility in controlling the relative movement. This allows for greater control of the reduction in kinetic energy according to this embodiment. This allows for reduced loads on the wearer's joints and improved cushioning.

[0075] When referring to "the one or more upper protrusions and / or the one or more lower protrusions are spaced apart from one another," it should be understood that this means that the one or more upper protrusions are spaced apart from one another and / or that it means that the one or more lower protrusions are spaced apart from one another. It may not mean that the one or more upper protrusions are spaced apart from the one or more lower protrusions. However, it should be noted that in some cases, the latter may still be encompassed by the present disclosure.

[0076] By spaced apart it is meant that the distance between two respective elements can be relative. In one example, the distance can be discernible by one skilled in the art without the need for any particular device.

[0077] The horizontal plane referred to herein may be approximately perpendicular to the vertical axis. The horizontal plane may be the plane defined by the heel-toe axis and the medial-lateral axis of the sole.

[0078] In preferred embodiments of the sole for a shoe described herein, the one or more upper projections and / or the one or more lower projections are spaced apart from one another by at least 1 cm, preferably at least 1.5 cm, more preferably at least 2 cm, even more preferably at least 2.5 cm, most preferably at least 3 cm, and / or by at most 8 cm, preferably at most 6 cm, more preferably at most 5 cm, even more preferably at most 4 cm, even more preferably at most 3.5 cm, most preferably at most 3 cm, when viewed in the horizontal plane of the sole, preferably along the heel-toe axis of the sole.

[0079] The spacing of the upper protrusion(s) and / or lower protrusion(s) as defined in this embodiment allows for an optimal balance between two different and / or conflicting requirements.

[0080] On the one hand, it should provide sufficient relative movement between the upper and lower midsole layers, which can reduce kinetic energy and thus provide reduced joint loads and improved cushioning for the wearer. For this, a larger spacing may be advantageous. On the other hand, it should ensure that the sole still provides sufficient stability to allow the wearer to perform his / her activity in a generally safe manner. For this, a smaller spacing is advantageous.

[0081] Thus, without wishing to be bound by theory, it is believed that the values ​​defined herein provide an optimal balance between these conflicting requirements.

[0082] In a preferred embodiment of the sole for a shoe described herein, the one or more upper projections and the one or more upper recesses are arranged alternately, preferably when viewed along the heel-toe axis of the sole.

[0083] This can have the advantage that a simple pattern can be established. In addition, the assembly of the upper and lower midsole layers can be improved. Alternating the projections and recesses along the heel-toe axis can be particularly advantageous for attenuating forces along the medial-lateral axis of the sole.

[0084] Alternating may be understood to mean that an upper protrusion is followed by an upper recess which is followed by an upper protrusion, and so on.

[0085] In preferred embodiments of the sole for a shoe described herein, the one or more upper lugs and / or the one or more lower lugs preferably have an elongated shape with a longitudinal axis generally parallel to the medial-lateral axis of the sole.

[0086] The elongated shape can have the advantage that the stiffness and / or stability of the shear structure can be influenced and / or adjusted as required, in addition to allowing flexibility to impart additional functionality to the shear structure.

[0087] The term "elongated" means that the dimension along one axis of the projection may be greater than one, and preferably both, dimensions along the remaining axes, the remaining axes being generally perpendicular to said one axis. It should be understood that when dimensions are given herein, manufacturing tolerances must usually be taken into account. Thus, the dimensions given herein may vary slightly.

[0088] In preferred embodiments of the sole for a shoe described herein, the one or more upper projections and / or the one or more lower projections have a shape when viewed in the horizontal plane of the sole that includes one or more of line segments defined by a mathematical function, in particular a periodic mathematical function such as a sine wave, a zigzag line segment, a sawtooth line segment.

[0089] This may have the advantage that the relative movement of the upper midsole layer and the lower midsole layer can be enhanced and more significantly controlled. Furthermore, having a sloping shape of the protrusions allows some interlocking of one or more upper protrusions with the respective one or more lower recesses and / or some interlocking of one or more lower protrusions with the respective one or more upper recesses. The interlocking can improve that the upper midsole layer and the lower midsole layer do not move substantially relative to each other along the medial-lateral axis of the sole. This can enhance providing sufficient stability to the wearer during running. At the same time, sufficient shear movement along the heel-toe axis is allowed, reducing mechanical loads on the wearer. The sloping shape of the protrusions can also allow a softer stop, for example a softer, more defined stop, to occur. This may be better compared to a very abrupt stop and / or an immediate stop.

[0090] As a person skilled in the art will understand, the shape of the sole when viewed in a horizontal plane can in this context mean that the projection is represented by a two-dimensional horizontal plane, even if the protrusions are not located in said horizontal plane.

[0091] It should be understood that the shear forces that occur can affect the overall performance of the shoe sole. Excessive shear can lead to instability and reduced control during running, affecting the gait cycle and potentially leading to discomfort or injury. Thus, this embodiment has the advantage of providing some control over the extent of relative movement. For example, the relative movement can be at least partially limited.

[0092] It should be noted that the shape can include one or more of the defined line segments herein. This means that any combination of the defined line segments can be arranged in sequence, for example in any way, to provide the shape. It is particularly preferred that the shape can be composed of zigzag or sawtooth lines. In this way, improved movement control along the heel-toe axis can be provided for the upper and lower midsole layers. This can improve the guidance of the upper and lower midsole layers. This can result in a softer stop, for example a softer, more defined stop, compared to a very abrupt and / or immediate stop. Such a softer stop has been found to be advantageous in attenuating impacts on the wearer's body.

[0093] In preferred embodiments of the sole for a shoe described herein, the one or more upper projections and / or the one or more lower projections comprise one or more side surfaces, the normal of which is approximately parallel to the horizontal plane of the sole and which are inclined with respect to the medial-lateral axis of the sole, preferably having an angle of at least 2°, preferably at least 5°, more preferably at least 10°, even more preferably at least 15°, even more preferably at least 20°, even more preferably at least 25°, even more preferably at least 30°, and / or at most 85°, preferably at most 80°, more preferably at most 60°, even more preferably at most 55°, even more preferably at most 50°, even more preferably at most 45°, even more preferably at most 40°.

[0094] On the other hand, an increase in the angle can result in a greater resistance of the respective projections approximately interlocking with one another. For example, an angle of 90° means that the side surface is approximately perpendicular to the medial-lateral axis of the sole, i.e., approximately parallel to the heel-toe axis of the sole. Thus, if the angle is too large, the desired relative movement may be too restricted. Therefore, a smaller angle value is advantageous.

[0095] On the other hand, it should be ensured that the angle is not too small, since otherwise the resistance of the respective protrusions approximately interlocking with one another may be too small, which may lead to an unsafe feeling during running, since the relative movement cannot be limited to a sufficient amount. Therefore, a larger value of the angle is advantageous.

[0096] Against this background, and without wishing to be bound by theory, it is believed that the values ​​defined herein allow for an optimal balance between these conflicting requirements.

[0097] In preferred embodiments of the sole for a shoe described herein, the one or more upper projections and / or the one or more lower projections have a maximum height perpendicular to the horizontal plane of the sole of at least 2 mm, preferably at least 3 mm, more preferably at least 5 mm, even more preferably at least 8 mm, most preferably at least 10 mm, and / or at most 20 mm, preferably at most 18 mm, more preferably at most 16 mm, even more preferably at most 14 mm, most preferably at most 12 mm.

[0098] On the other hand, the upper protrusion or protrusions and / or the lower protrusion or protrusions should have a sufficient height so that they can properly engage with the corresponding recess or recesses. As can be understood, this can help to bring about deformation of the upper protrusions and / or the lower protrusions, since the material is somewhat weak and contributes to the deformation of the material. This can therefore contribute to reducing the kinetic energy, thereby contributing to reducing the joint load and improving the cushioning for the wearer. For this reason, a larger height can be advantageous.

[0099] On the other hand, the height of the upper protrusion(s) and / or the lower protrusion(s) should not be too large, since the total thickness of the midsole may increase unnecessarily. In addition, protrusions with a relatively large height increase the weight of the sole. For this reason, a smaller height is advantageous.

[0100] Thus, without wishing to be bound by theory, it is believed that the values ​​defined herein provide an optimal balance between these conflicting requirements.

[0101] The maximum height may be understood as an average height based on the heights of substantially all of the protrusions provided, however, in one example, the maximum height may mean the maximum height of one protrusion.

[0102] It should be noted that in the plane defined by the medial-lateral axis of the sole and the heel-toe axis of the sole, a distance may be provided between the upper projections and the respective lower recesses and / or between the lower projections and the respective upper recesses. This distance may help provide friction as the respective projections move to bridge said distance. This may help convert kinetic energy into heat to reduce impact on the wearer's joints.

[0103] Sole plate In a preferred embodiment of the sole for a shoe described herein, the sole further comprises a sole plate provided between the upper midsole layer and the lower midsole layer and configured to control the relative movement between the upper midsole layer and the lower midsole layer.

[0104] This may have the advantage that the upper and lower midsole layers are provided with additional functionality, including but not limited to improved reinforcement. Furthermore, the sole plate may allow fine-tuning of the relative movement between the upper and lower midsole layers. The term "controlling" the relative movement may mean preventing and / or encouraging the relative movement. As will be appreciated, such control may depend on the desired outcome and / or use case of the shoe sole.

[0105] The term soleplate can refer to a flat plate or surface used for a particular purpose. The soleplate can provide stability and support to the wearer's foot.

[0106] In preferred embodiments of the sole for a shoe described herein, the sole plate includes protrusions and / or recesses that engage corresponding recesses and / or protrusions provided in the lower midsole layer and / or the upper midsole layer.

[0107] This further contributes to the advantages mentioned in the above embodiment, in particular the control of relative movement can be improved by the protrusions and / or recesses.

[0108] In a preferred embodiment of the sole for a shoe described herein, the projections of the sole plate are at least partially hollow and / or at least partially filled with foam.

[0109] This can have the advantage that the projections can have a different function than the rest of the sole plate, thereby directing the overall function of the sole plate to a more specific use case. The hollow and / or at least partially filled projections have the additional function of a more rigid arrangement. This can contribute to the stability of the shoe sole, which can be important to at least partially compensate for the relative movements due to the shear structure. Thus, stability and cushioning can be provided at the same time.

[0110] In preferred embodiments of the sole for a shoe described herein, the sole plate is elongated and arranged along a heel-toe axis and the recesses and / or protrusions provided in the lower midsole layer and / or the upper midsole layer are also elongated and arranged along the heel-toe axis of the sole.

[0111] This can have the advantage that the relative movement between the upper and lower midsole layers can be controlled to a greater extent. For example, the elongated shape of the recesses and / or protrusions facilitates the absorption of forces generally parallel to the medial-lateral axis to a greater extent. This does not mean that the relative movement between the upper and lower midsole layers is prevented, since according to the shoe sole proposed herein, such relative movement generally parallel to the heel-toe axis of the sole is desirable.

[0112] The term "elongated" as referred to in this embodiment may be understood as being the same as described elsewhere herein.

[0113] In a preferred embodiment of the sole for a shoe described herein, the depressions and / or protrusions of the sole plate preferably have a substantially semicircular or arcuate profile when viewed along the heel-toe axis.

[0114] This can have the advantage that the control of the relative movement between the upper and lower midsole layers can be improved. The profile defined herein allows a good compromise with a relatively large restriction in the movement along the lateral-medial side, while at the same time the circular shape contributes to the sliding along the heel-toe axis of the sole. The profile described in this embodiment therefore creates a higher flexibility and contributes to an improved shoe sole.

[0115] In one example, the profile has a substantially similar shape along its entire length when viewed along the heel-toe axis, hi another example, the shape of the profile can vary along its entire length along the heel-toe axis.

[0116] As will be appreciated, the semicircular or arcuate profile need not be a perfect semicircular or arcuate profile, rather manufacturing tolerances may result in slight deviations from such a perfect profile.

[0117] In a preferred embodiment of the sole for a shoe described herein, the sole plate comprises a stop element arranged obliquely relative to the projections and / or recesses of the sole plate, the stop element being preferably located in the toe area of ​​the forefoot portion of the midsole.

[0118] This can have the advantage that the sole plate can be adjusted to fit the midsole more precisely. Furthermore, the position of the sole plate can be substantially maintained during use of a shoe equipped with such a sole. The diagonal arrangement of the stop elements relative to the projections and / or recesses of the sole plate allows support in two substantially perpendicular directions. This can ensure, for example, that the sole plate does not substantially move relative to another part of the midsole, although such relative movement is not precluded by the sole for a shoe proposed herein.

[0119] The stop element can be implemented by various means. For example, a mechanical stop can be provided. In such an example, the stop element can have a physical extension and can be recognized as such. In this example, the physical extension of the stop element can have some engagement with another portion of the midsole, for example, the upper midsole layer and / or the lower midsole layer. Said engagement can include a form-fit connection, as described in more detail elsewhere herein. In other examples, the stop element can be provided by fasteners, adhesives, etc. alone or in combination with a portion having a physical extension.

[0120] In a preferred embodiment of the sole for a shoe described herein, the sole plate extends along the entire length of the shear structure when viewed in the heel-toe axis of the sole.

[0121] This can have the advantage that the effect of the sole plate on the reinforcement of the shoe sole can be increased. In particular, as described elsewhere herein, the shear structure provides for relative movement between the upper and lower midsole layers, so that this part of the midsole can be perceived as "softer" by the wearer compared to other parts of the midsole. Thus, if the sole plate extends along the entire length of the shear structure, the softness can be partially compensated for, and a good compromise can be found.

[0122] In particular, the shear structure can also provide frictional forces that allow the shoe sole to reduce kinetic energy and thereby joint loads on the wearer's body. Nevertheless, as described in this embodiment, the sole can still provide sufficient stability and / or provide sufficient energy return to the wearer, possibly due to the extension of the sole plate.

[0123] In one example, the sole plate can extend at least 10%, preferably at least 20%, more preferably at least 30%, even more preferably at least 40%, even more preferably at least 50%, even more preferably at least 60%, even more preferably at least 70%, even more preferably at least 80%, even more preferably at least 90% of the total length of the sole along the heel-toe axis of the sole.

[0124] For example, the sole plate may begin in the midfoot portion of the sole and extend to the toe portion of the sole.

[0125] Hollow spaces / filling of structures In a preferred embodiment of the sole for a shoe described herein, the shear structure preferably comprises a hollow space that is devoid of the upper midsole layer and / or the lower midsole layer.

[0126] The hollow space may have the advantage of allowing greater relative movement between the upper and lower midsole layers. This may result in improved cushioning and reduced joint loads. Without wishing to be bound by theory, it is believed that the hollow space may allow for improved internal friction and / or solid friction, for example reducing kinetic energy when the sole strikes the ground. This improves the cushioning effect. For example, the shear structure may be designed such that at least a portion of it can deform, thereby escaping at least partially into the hollow space. As a result, the surfaces of the shear structure may contact each other to provide solid friction. In addition, due to the deformation into the hollow space, the internal friction may provide further benefits in reducing kinetic energy and improving the cushioning effect.

[0127] The term "hollow space" as used in this disclosure can be considered as a three-dimensional volume. In one example, the hollow space can be empty, e.g., no part, component, element, etc., can be disposed in the hollow space. Being empty can encompass that a gas, such as air, can be disposed in the hollow space. Alternatively or in addition, the hollow space can be at least partially filled with one or more parts, components, elements, etc. (e.g., a portion of a midsole). In one example, the hollow space referred to herein is understood as a macroscopic space, i.e., a space that a person skilled in the art can easily recognize as such without the need for detailed investigation. In one example, the hollow space can be a cavity, etc. In one example, the hollow space can include a plurality of interconnected sub-hollow spaces that, when combined, form the hollow space. In one example, the hollow space can include a plurality of sub-hollow spaces, not all of which are connected to each other. The plurality of sub-hollow spaces can, when combined, form the hollow space. In one example, the hollow space can be at least partially free to the environment.

[0128] In a preferred embodiment of the sole for a shoe described herein, the shear structure comprises a solid material, such as a foam material.

[0129] A solid material may have the advantage that it can provide corresponding surface friction and / or internal friction, i.e. friction within the material itself, which can reduce the kinetic energy and improve the cushioning effect, which can reduce the load on the joints of the wearer and make the shoe more comfortable to wear, for example while running.

[0130] As described elsewhere in this disclosure, the shear structure may include hollow spaces. However, this does not exclude the shear structure from including solid material. In one example, both are present, i.e., the shear structure includes hollow spaces and solid material.

[0131] visibility In preferred embodiments of the sole for a shoe described herein, the shear structure is at least partially visible when viewed from the outside, preferably from the lateral side of the midsole and / or the medial side of the midsole, more preferably from the lateral forefoot of the midsole and / or the medial forefoot of the midsole.

[0132] This can have the advantage that the parts of the sole that are visible, i.e. the appearance of the shear structure, can be adjusted to indicate to the wearer that the shear structure has a certain function. Without wishing to be bound by theory, it is believed that the visibility allows the wearer to adapt their performance and / or behavior. For example, the wearer can attempt to operate, e.g. run, in such a way that the shear structure is not particularly exposed to external impacts that may cause damage to the shear structure. Furthermore, such visibility can affect the wearer's performance, self-confidence, and / or motivation to participate in athletic activities in the first place.

[0133] Additionally, having the shear structure at least partially visible when viewed from the outside can have the advantage that a person can assess the condition of the shear structure, such as its solidity, stiffness, integrity, loading condition, damage, etc.

[0134] A shear structure that is at least partially visible may be understood to be one that is perceptible by a person during normal use of the sole for a shoe without requiring significant inspection of the sole, however, as described elsewhere herein, there may be cases where the shear structure is not visible or may only be partially visible with the sole fully assembled on the shoe.

[0135] In a preferred embodiment of the sole for a shoe described herein, the shear structure has a sawtooth shape when viewed from the outside, preferably when viewed from the lateral side of the midsole and / or the medial side of the midsole, more preferably when viewed from the lateral forefoot of the midsole and / or the medial forefoot of the midsole. At least the same advantages as mentioned in the above embodiment regarding the visibility of the shear structure apply equally to the sawtooth shape when viewed from the outside of this embodiment.

[0136] It should be noted that in some instances, the shear structure may not be completely visible from the outside when a shoe with the sole is assembled. In one instance, additional materials and / or elements can at least partially cover the shear structure when viewed from the outside. Thereby, in some cases, the term "viewed from the outside" means from the outside of the sole when the shoe is not fully assembled and / or manufactured. Nevertheless, it may often be the case that the shear structure is almost completely visible from the outside even when the shoe is fully assembled and / or manufactured. As will be appreciated, the shear structure can have an extension in the midsole that is covered by a material and therefore not visible from the outside.

[0137] material In preferred embodiments of the soles for shoes described herein, the upper midsole layer comprises a first material and the lower midsole layer comprises a second material, the first material being different from the second material or the first material being substantially the same as the second material.

[0138] This has the advantage that the upper and lower midsole layers can be provided with different functions that are specifically tailored to the desired result. This can contribute to enhanced cushioning for the wearer's foot. For example, the upper midsole layer can be provided with a material that is specifically adapted to provide a higher cushioning for the wearer's foot, since it can be closer to the wearer's foot. Alternatively or additionally, the reverse is also possible and is not excluded by the present disclosure. For example, the lower midsole layer can be provided with a material that is specifically adapted to provide a higher cushioning for the wearer's foot.

[0139] A first material different from a second material can have the particular advantage of being able to provide different degrees of friction. This can include different degrees of internal friction and / or different degrees of solid friction (static, rolling and / or kinetic friction). For example, different materials can be provided that exhibit different coefficients of friction. Alternatively or in addition, the surface roughness of the upper midsole layer and / or the lower midsole layer may be different. Overall, this allows the relative movement to be fine-tuned to dampen the forces acting on the wearer's foot. This can, for example, reduce the kinetic energy when the sole strikes the ground. This can reduce the load on the joints and reduce the impact on the muscles, as described elsewhere herein.

[0140] For example, the first material may be lighter or heavier than the second material. For example, the first material may have approximately the same weight as the second material.

[0141] The first material being substantially the same as the second material can have the advantage of improving the manufacturing process. In addition, this can have the advantage of providing substantially the same material properties to the lower midsole layer and the upper midsole layer. In some cases, this can be desirable to have substantially consistent performance and / or substantially consistent properties throughout the midsole. As will be understood, impurities of the first material and the second material may not be excluded hereby. That is, as will be understood by those skilled in the art, there may be slight deviations in the composition of the first material and the second material, but the first material and the second material can still be considered to be substantially the same.

[0142] In a preferred embodiment of the shoe sole described herein, the midsole, in particular the upper midsole layer and / or the lower midsole layer, comprises or consists of a particle foam material, in particular a particle foam material comprising particles of expanded thermoplastic polyurethane (eTPU), particles of expanded polyamide (ePA), particles of expanded polyether block amide (ePEBA) and / or particles of expanded thermoplastic polyester ether elastomer (eTPEE).

[0143] This has the advantage that the material is relatively easy to obtain, cost-effective, and widely accepted in the field of shoe soles. Particle foams are particularly useful for providing a cushioning and energy return effect, since such materials can have good elasticity and cushioning properties. Furthermore, softer or harder materials can be used depending on the desired degree of cushioning, support, stability, and / or solidity. This allows fine-tuning the reaction of the midsole, especially the upper and lower midsole layers, under pressure loads imposed on the sole, for example from the ground. The choice of material for the midsole, especially the upper and lower midsole layers, may be possible depending on the material of the upper and / or outsole of the shoe. This may have advantages regarding the attachment of the respective parts.

[0144] Polyurethane foam can be a versatile material that offers several advantages due to its ability to provide comfort, cushioning, insulation, and because it is relatively lightweight. Expanded thermoplastic polyurethane (eTPU) particles offer excellent elasticity and cushioning properties. Thus, for example, they can cushion external impacts that occur when the sole hits the ground and provide good wearing comfort.

[0145] Polyamide foam is sometimes known as nylon foam. Polyamide foam is a type of foam material formed from polyamide polymers. Polyamide foam is lightweight, allows for good cushioning and comfort, can have high durability, exhibits improved chemical resistance, its composition can be customized, and can be tailored to have relatively low water absorption. This makes polyamide foam suitable for applications where water resistance may be important. This can be advantageous for a variety of athletic activities.

[0146] Further examples of particle foams can include expanded polypropylene (ePP). The use of particle foams can greatly facilitate the manufacture of soles containing such particles. This can be, for example, because no special arrangement of the particles in the mold is required, and the particles can be blown or swept into the mold by air, steam, liquid, liquid-like powder material, etc. The particles can easily undergo further processing steps, such as pressure and / or steam treatment processes, or melting, which melts the particle surfaces and bonds them to each other without the need for additional adhesives, etc. In a preferred embodiment of the shoe sole described herein, the midsole, in particular the upper midsole layer and / or the lower midsole layer, comprises or consists of a homogenous foam material.

[0147] Such homogeneous foams can be referred to as polymeric or plastic foams. Such homogeneous foams can be produced, for example, by injection or compression molding. Homogeneous foams generally have no discernible granular structure, i.e., have substantially no identifiable particles within the finished foam.

[0148] Fixed attachment / outsole In a preferred embodiment of the sole for a shoe described herein, a portion of the upper midsole layer and a portion of the lower midsole layer are fixedly attached to one another.

[0149] This can have the advantage that the stability of the sole can be increased. When a part of the upper midsole layer and a part of the lower midsole layer are fixedly attached to each other, this has the advantage that a larger frictional force can be absorbed by the sole. In particular, when the frictional force due to relative movement increases, it can be advantageous to perform some attachment of a part of the upper midsole layer and a part of the lower midsole layer. This can ensure that these layers can be held together at least to some extent. In one example, there may be a maximum allowable frictional force due to relative movement, beyond which the stability of the sole may be compromised. It is believed that the maximum allowable frictional force can be at least partially increased by the attachment described herein.

[0150] It should be noted that attachment is advantageous because, without attachment, the upper and lower midsole layers may come apart due to relative movement due to shear structures, i.e., the upper and lower midsole layers should be fixedly attached to each other, at least to the extent that the stability of the midsole can be guaranteed.

[0151] In a preferred embodiment of the sole for a shoe described herein, the sole further comprises an outsole arranged below the midsole, preferably below the lower midsole layer.

[0152] The outsole may be the bottom part of the sole that is at least partially in direct contact with the ground. This means that the entire outsole does not necessarily have to be in contact with the ground, although this is often the case and is not excluded. The outsole can provide several benefits that contribute to the overall performance, comfort, grip, durability, stability, support, water resistance, and weather resistance of the sole.

[0153] Shoes In a further aspect of the present disclosure the object is solved by a shoe, in particular a sports shoe such as a running shoe, comprising a sole according to any one of the embodiments described herein and an upper attached to the sole.

[0154] It goes without saying that the technical characteristics, advantages and improvements over the prior art shown or described for the sole are equally applicable to shoes, in particular sports shoes, and vice versa.

[0155] The upper can be attached to the sole by any type of suitable attachment means. As will be appreciated by those skilled in the art, attaching a shoe upper to a sole can involve a variety of methods and techniques depending on the type of shoe, the materials used, and / or the desired level of durability and sturdiness of the upper.

[0156] In a preferred embodiment of the shoe, the shoe is one of a running shoe, a shoe for use during exercise, a shoe for use during athletics, etc. The above advantages of the shoe may be particularly noticeable when the shoe is used, such as downhill, in conditions where the joints and muscles of the wearer's body are typically subjected to high impacts.

[0157] Integrally formed upper and lower midsole layers In a second aspect of the present disclosure the object is solved by a sole for a shoe, in particular a sports shoe such as a running shoe, the sole comprising a midsole comprising an upper midsole layer and a lower midsole layer, the upper midsole layer and the lower midsole layer being integrally formed, and a shear structure arranged in a midfoot part and / or in a forefoot part of the midsole, the shear structure being configured to enable relative movements between the upper midsole layer and the lower midsole layer.

[0158] The term "integrally formed" can be understood as forming the upper midsole layer and the lower midsole layer as one single piece. This can mean that the upper midsole layer and the lower midsole layer are formed as one unitary piece, as described elsewhere herein. This can provide several advantages, such as increased strength and durability, simpler and easier manufacturing and / or assembly, reduced costs, reduced overall weight of the resulting structure and / or product, and improved performance, since it can reduce wear, vibration, noise, etc. associated with separate moving parts, in various contexts as described elsewhere herein. Further advantages are reduced material costs, reduced labor costs, and / or reduced assembly time, providing a simplified construction resulting in a more sustainable and environmentally friendly structure and / or product.

[0159] In a preferred embodiment of the shoe sole according to the second aspect, the shoe sole of the second aspect is a shoe sole according to any one of the preceding embodiments relating to the first aspect described herein.

[0160] Thereby, any one or more of the embodiments, features, advantages, examples, etc. described herein with respect to the first aspect may be combined with the second aspect described herein, and vice versa.

[0161] In particular, it goes without saying that the technical characteristics, advantages and improvements over the prior art shown or described for the sole for a shoe of the first embodiment are equally applicable to the sole for a shoe of the second embodiment, and vice versa.

[0162] method In a third aspect of the present disclosure, the object is solved by a method for manufacturing a sole for a shoe, in particular a sports shoe such as a running shoe, preferably for a shoe according to any one of the embodiments described herein, the method comprising: providing a midsole including an upper midsole layer and a lower midsole layer, the upper midsole layer and the lower midsole layer being at least partially separate from each other; and providing a shear structure arranged in the midsole, the shear structure being configured to allow relative movement between the upper midsole layer and the lower midsole layer. It is understood that any one or more of the embodiments, features, advantages, examples described herein with respect to the remaining aspects of the present specification can be combined with the third aspect described herein, and vice versa. In particular, it goes without saying that the technical characteristics, advantages and improvements over the prior art illustrated or described for the sole for a shoe of the first and second aspects are equally applicable to the method of the third aspect, and vice versa.

[0163] It should be noted that the term "approximately" as used herein can be used to include slight tolerances and / or variations, and therefore any value or configuration described by using this term may deviate slightly from the described value or configuration.

[0164] The present invention includes the following embodiments. [1] A sole (101) for a shoe, in particular for a sports shoe such as a running shoe, comprising: a midsole (110) including an upper midsole layer (120) and a lower midsole layer (125), the upper midsole layer (120) and the lower midsole layer (125) being at least partially separate from one another; a shear structure (130) disposed in the midsole (110); Equipped with A sole for a shoe, the sole comprising a shear structure (130) configured to permit relative movement between an upper midsole layer (120) and a lower midsole layer (125).

[0165] [2] The sole for a shoe (101) according to embodiment [1], wherein the movement of the upper midsole layer and the lower midsole layer is preferably approximately parallel to the heel-toe axis (HT) of the sole.

[0166] [3] the relative movement between the upper midsole layer (120) and the lower midsole layer (125) occurs within a plane defined by the medial-lateral axis (ML) of the sole (101) and the heel-toe axis (HT) of the sole (101); The shoe sole (101) according to embodiment [1], wherein the relative movement between the upper midsole layer (120) and the lower midsole layer (125) is preferably approximately parallel to the heel-toe axis (HT) of the sole (101).

[0167] [4] The shear structure (130) is disposed in at least one of the forefoot portion (111) of the midsole (110), the midfoot portion (112) of the midsole (110), the rearfoot portion (113) of the midsole (110), the lateral portion of the midsole (110), and the medial portion of the midsole (110), preferably in at least one of the forefoot portion (111) of the midsole (110) and the midfoot portion (112) of the midsole (110), such as the lateral forefoot portion (111a) of the midsole (110), the medial portion of the midsole (110), The sole (101) for shoes according to any one of the embodiments [1] to [3] is configured to enable relative movement between the upper midsole layer (120) and the lower midsole layer (125) in the medial forefoot portion (111b), the lateral midfoot portion (112a) of the midsole (110), and the medial midfoot portion (112b) of the midsole (110), most preferably in at least one of the lateral forefoot portion (111a) of the midsole (110) and the lateral midfoot portion (112a) of the midsole (110).

[0168] [5] the shear structure (130) includes an upper shear structure (131) of the upper midsole layer (120) and a lower shear structure (136) of the lower midsole layer (125), the upper shear structure (131) and the lower shear structure (136) facing each other; The upper shear structure (131) and the lower shear structure (136) are preferably disposed in a forefoot portion (111) of the midsole (110) and / or a midfoot portion (112) of the midsole (110), and most preferably disposed in a lateral forefoot portion (111a) of the midsole (110) and / or a lateral midfoot portion (112a) of the midsole, in the shoe sole (101) according to any one of the embodiments [1] to [4].

[0169] [6] The shoe sole (101) of embodiment [4], wherein the upper shear structure (131) and the lower shear structure (136) at least partially engage with each other.

[0170] [7] The shoe sole (101) according to embodiment [5] or [6], wherein the upper shear structure (131) and the lower shear structure (136) are molded to correspond approximately to each other.

[0171] [8] The sole (101) for a shoe according to any one of embodiments [5] to [7], wherein the upper shear structure (131) and the lower shear structure (136) engage with each other via a form-fitting connection.

[0172] [9] The sole (101) for a shoe according to any one of the embodiments [5] to [8], wherein the upper shear structure (131) is integrally formed with the upper midsole layer (120) and the lower shear structure (136) is integrally formed with the lower midsole layer (125).

[0173]

[10] the upper shear structure (131) includes one or more upper protrusions (132), the lower shear structure (136) includes one or more lower recesses (138), and / or The shoe sole (101) according to any one of the embodiments [1] to [9], wherein the lower shear structure (136) comprises one or more lower protrusions (137) and the upper shear structure (131) comprises one or more upper recesses (133).

[0174]

[11] one or more upper projections (132) are at least partially received in one or more lower recesses (138); and / or A shoe sole (101) according to embodiment

[10] , wherein one or more lower protrusions (137) are at least partially housed in one or more upper recesses (133).

[0175]

[12] The shoe sole (101) according to embodiment

[10] or

[11] , wherein the one or more upper projections (132) and / or the one or more lower projections (137) are spaced apart (w) from one another when viewed in a horizontal plane of the sole (101), preferably when viewed along a heel-toe axis (HT) of the sole (101).

[0176]

[13] A sole (101) for a shoe according to embodiment

[12] , wherein the one or more upper projections (132) and / or the one or more lower projections (137) are spaced apart (w) from one another by at least 1 cm, preferably at least 1.5 cm, more preferably at least 2 cm, even more preferably at least 2.5 cm, most preferably at least 3 cm, and / or by at most 8 cm, preferably at most 6 cm, more preferably at most 5 cm, even more preferably at most 4 cm, even more preferably at most 3.5 cm, most preferably at most 3 cm, when viewed in a horizontal plane of the sole (101), preferably when viewed along the heel-toe axis (HT) of the sole (101).

[0177]

[14] A shoe sole (101) according to any one of the embodiments

[10] to

[13] , wherein one or more upper protrusions (132) and one or more upper recesses (133) are arranged alternately, preferably when viewed along the heel-toe axis (HT) of the sole (101).

[0178]

[15] The shoe sole (101) according to any one of the embodiments

[10] to

[14] , wherein the one or more upper projections (132) and / or the one or more lower projections (137) have an elongated shape, preferably with a longitudinal axis approximately parallel to the medial-lateral axis (ML) of the sole (101).

[0179]

[16] The sole (101) for a shoe according to any one of the embodiments

[10] to

[15] , wherein the one or more upper protrusions (132) and / or the one or more lower protrusions (137) have a shape, when viewed in a horizontal plane of the sole (101), that includes one or more of line segments defined by a mathematical function, in particular a periodic mathematical function such as a sine wave, a zigzag line segment, or a sawtooth line segment.

[0180]

[17] The sole (101) for a shoe according to any one of the embodiments

[10] to

[16] , wherein the one or more upper projections (132) and / or the one or more lower projections (137) comprise one or more side surfaces (134), the normal of which is approximately parallel to the horizontal plane of the sole (101), and the side surfaces (134) are inclined with respect to the medial-lateral axis (ML) of the sole (101), preferably with an angle (α) of at least 5°, preferably at least 10°, more preferably at least 15°, even more preferably at least 20°, even more preferably at least 25°, even more preferably at least 30°, and / or at most 80°, preferably at most 60°, more preferably at most 55°, even more preferably at most 50°, even more preferably at most 45°, even more preferably at most 40°.

[0181]

[18] The sole (101) for a shoe according to any one of the embodiments

[10] to

[17] , wherein the one or more upper protrusions (132) and / or the one or more lower protrusions (137) have a maximum height (h) perpendicular to a horizontal plane of the sole (101) of at least 2 mm, preferably at least 3 mm, more preferably at least 5 mm, even more preferably at least 8 mm, most preferably at least 10 mm, and / or at most 20 mm, preferably at most 18 mm, more preferably at most 16 mm, even more preferably at most 14 mm, and most preferably at most 12 mm.

[0182]

[19] The shoe sole (101) according to any one of the embodiments [1] to

[18] , further comprising a sole plate (140) provided between the upper midsole layer (120) and the lower midsole layer (125) and configured to control the relative movement between the upper midsole layer (120) and the lower midsole layer (125).

[0183]

[20] The shoe sole (101) according to embodiment

[19] , wherein the sole plate (140) includes protrusions (144) and / or recesses (143) that engage with corresponding recesses (126) and / or protrusions (121) provided in the lower midsole layer (125) and / or the upper midsole layer (120).

[0184]

[21] The shoe sole (101) according to embodiment

[19] or

[20] , wherein the projections (144) of the sole plate (140) are at least partially hollow and / or at least partially filled with foam.

[0185]

[22] The shoe sole (101) according to any one of the embodiments

[19] to

[21] , wherein the sole plate (140) is elongated and disposed along the heel-toe axis (HT), and the depressions (126) and / or protrusions (121) provided in the lower midsole layer (125) and / or the upper midsole layer (121) are also elongated and disposed along the heel-toe axis (HT) of the sole (101).

[0186]

[23] The shoe sole (101) according to any one of the embodiments

[19] to

[22] , wherein the depressions (143) and / or protrusions (144) of the sole plate (140) have a substantially semicircular or arcuate outline, preferably when viewed along the heel-toe axis (HT).

[0187]

[24] The shoe sole (101) according to any one of the embodiments

[19] to

[23] , wherein the sole plate (140) includes a stop element (145) arranged obliquely relative to the projection (121) and / or the depression (126) of the sole plate (140), and the stop element (145) is preferably arranged in the toe portion (111c) of the forefoot portion (111) of the midsole (110).

[0188]

[25] The sole (101) for a shoe according to any one of the embodiments

[19] to

[24] , wherein the sole plate (140) extends along the entire length (I) of the shear structure (130) when viewed along the heel-toe axis (HT) of the sole (101).

[0189]

[26] The sole (101) for a shoe according to any one of the embodiments [1] to

[25] , wherein the shear structure (130) preferably comprises a hollow space (135) free of an upper midsole layer (120) and / or a lower midsole layer.

[0190]

[27] The sole (101) for a shoe according to any one of embodiments [1] to

[26] , wherein the shear structure (130) comprises a solid material, such as a foam material.

[0191]

[28] The sole (101) for a shoe according to any one of the embodiments [1] to

[27] , wherein the shear structure (130) is at least partially visible when viewed from the outside, preferably from the lateral side of the midsole (110) and / or the medial side of the midsole (110), more preferably from the lateral forefoot portion (111a) of the midsole (110) and / or the medial forefoot portion (111b) of the midsole (110).

[0192]

[29] The sole (101) for shoes according to any one of the embodiments [1] to

[28] , wherein the shear structure (130) has a sawtooth shape (139) when viewed from the outside, preferably when viewed from the lateral side of the midsole (110) and / or the medial side of the midsole (110), more preferably when viewed from the lateral forefoot portion (111a) of the midsole (110) and / or the medial forefoot portion (111b) of the midsole (110).

[0193]

[30] an upper midsole layer (120) comprising a first material and a lower midsole layer (125) comprising a second material; The first material is different from the second material, or The shoe sole (101) according to any one of the embodiments [1] to

[29] , wherein the first material is substantially the same as the second material.

[0194]

[31] The sole for a shoe (101) according to any one of the embodiments [1] to

[30] , wherein the midsole (110), in particular the upper midsole layer (120) and / or the lower midsole layer (125), comprises or consists of a particle foam material, in particular a particle foam material comprising particles of expanded thermoplastic polyurethane (eTPU), particles of expanded polyamide (ePA), particles of expanded polyether block amide (ePEBA), and / or particles of expanded thermoplastic polyester ether elastomer (eTPEE).

[0195]

[32] The shoe sole (101) according to any one of the embodiments [1] to

[31] , wherein the midsole (110), in particular the upper midsole layer (120) and / or the lower midsole layer (125), comprises or consists of a homogeneous foam material.

[0196]

[33] The sole (101) for shoes according to any one of the embodiments [1] to

[32] , wherein a portion of the upper midsole layer (120) and a portion of the lower midsole layer (125) are fixedly attached to each other.

[0197]

[34] The sole (101) for shoes according to any one of the embodiments [1] to

[33] , wherein the sole (101) further comprises an outsole arranged below the midsole (110), preferably below the lower midsole layer (125).

[0198]

[35] Shoes, particularly sports shoes such as running shoes, A sole according to any one of the above embodiments, The upper attached to the sole (101) Shoes that are equipped with

[0199]

[36] A sole (101) for a shoe, in particular for a sports shoe such as a running shoe, comprising: A midsole (110) including an upper midsole layer (120) and a lower midsole layer (125), the upper midsole layer (120) and the lower midsole layer (125) being integrally formed; a shear structure (130) disposed in a midfoot portion (112) of the midsole (110) and / or a forefoot portion (111) of the midsole (110); Equipped with A sole for a shoe, the sole comprising a shear structure (130) configured to permit relative movement between an upper midsole layer (120) and a lower midsole layer (125).

[0200]

[37] A method for manufacturing a sole (101) for a shoe, in particular a sports shoe such as a running shoe, preferably for a shoe according to any one of the embodiments [1] to

[35] , comprising: Providing a midsole (110) including an upper midsole layer (120) and a lower midsole layer (125), the upper midsole layer (120) and the lower midsole layer (125) being at least partially separate from one another; providing a shear structure (130) disposed in the midsole (110); Including, The method, wherein the shear structure (130) is configured to allow relative movement between the upper midsole layer (120) and the lower midsole layer (125).

[0201] In the following the invention will be explained in more detail with reference to the following drawings: [Brief description of the drawings]

[0202] [Figure 1] FIG. 2 illustrates an upper midsole layer of a sole for a shoe, in particular a sports shoe, according to an embodiment of the present disclosure. [Diagram 2]FIG. 2 illustrates a lower midsole layer of a sole for a shoe, in particular a sports shoe, according to an embodiment of the present disclosure. [Diagram 3] 3 shows the embodiment of FIGS. 1 and 2 in an assembled state in accordance with an embodiment of the present disclosure. FIG. [Figure 4] FIG. 3 is a detailed view of FIGS. 1 and 2. [Diagram 5] 1A-1D show a sole plate of a sole for a shoe, in particular for a sports shoe, according to an embodiment of the present disclosure, from two different sides. [Figure 6] 1A-1D show upper and lower midsole layers of a sole for a shoe, in particular for a sports shoe, and a sole plate of a sole for a shoe according to an embodiment of the present disclosure. [Figure 7] FIG. 1 illustrates a shoe, in particular a sports shoe, with a sole and a sole plate according to an embodiment of the present disclosure. [Figure 7a] FIG. 8 is a view showing the embodiment of FIG. 7 from the inside. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0203] In the following, only some possible embodiments of the present invention are described in detail. However, the present invention is not limited thereto, and many other embodiments are applicable without departing from the scope of the present invention. The presented embodiments can be modified in several ways, can be combined with each other whenever suitable, and certain features can be omitted as long as they are considered insignificant. In particular, the disclosed embodiments can be modified by combining a feature of one embodiment with one or more features of another embodiment.

[0204] It should be understood that not all features of the described aspects / embodiments must be present to achieve the technical advantages offered by the present disclosure as defined by the subject matter of the claims. The disclosed aspects / embodiments can be modified by combining a feature of one aspect / embodiment with one or more features of another aspect / embodiment. In particular, those skilled in the art will understand that features and / or functional elements of one aspect / embodiment can be combined with technically compatible features and / or functional elements of any other aspect / embodiment of the present disclosure, provided that the resulting combination is included within the definition of the present disclosure.

[0205] Although the following embodiments are primarily described in relation to soles for shoes, and in particular sports shoes, those skilled in the art will recognize that the present disclosure may be equally applied to multiple different technical fields and / or use cases.

[0206] Throughout the drawings and specification, the same reference numerals refer to the same elements. For clarity and brevity, certain aspects of components or steps of an embodiment are presented without undue detail. Such details would be apparent to one of ordinary skill in the art in light of the teachings herein and / or such details would obscure an understanding of more relevant aspects of the embodiment.

[0207] As will be understood by those skilled in the art and / or to avoid repetition, reference is also made to the explanations in the preceding paragraphs, which also apply to the following detailed description. Moreover, for brevity and clarity, not all features, parts, elements, aspects, components, and / or steps are explicitly indicated by reference signs. This is particularly true when those skilled in the art will recognize that there are multiple such features, parts, elements, aspects, components, and / or steps.

[0208] definition The term "midsole" as used in this disclosure can refer to a layer of material that can be located between the outsole of a shoe, e.g., the bottom part of the sole that contacts the ground, and the upper of the shoe, e.g., the portion of the shoe that covers the top of the wearer's foot.

[0209] The term "outsole" as used in this disclosure may refer to the bottom of the sole that is at least partially in direct contact with the ground. This means that the entire outsole does not necessarily have to be in contact with the ground, although this is often the case. The outsole can provide several benefits that contribute to the overall performance, comfort, grip, durability, stability, support, water resistance, and weather resistance of the sole.

[0210] As used herein, the "inner", "inner side", "inner side region" and / or "inner side portion" of the sole / midsole may refer to the medial side and / or inner edge of the sole / midsole. This side and / or edge may be closest to the centerline of the wearer's body when a shoe comprising the sole is worn. This side and / or edge may extend from the big toe area to the heel area. The term "inner side portion" may further include a small area extending from the medial side of the sole towards the heel-toe centerline. The "inner side" and / or "inner side portion" is typically positioned against the arch of the foot and / or big toe.

[0211] As used herein, "outer", "outer side", "outer region" and / or "outer portion" of the sole / midsole may refer to the outside and / or outer edge of the sole / midsole. This side and / or edge may be away from the centerline of the wearer's body when a shoe comprising the sole is worn. This side and / or edge may extend from the little toe area to the heel area. The "outer portion" may further include a small area extending from the outer side of the sole toward the heel-toe centerline.

[0212] As used herein, the "toe portion" and / or "toe region" of the sole / midsole may refer to a front portion of the sole / midsole that may receive the toes of the wearer's foot when worn, e.g., the forefoot portion of the sole / midsole. The toes of the wearer's foot may include the big toe and / or big toe joint. The toe portion and / or toe region may include the front end of the foot when worn. Additionally, the toe portion and / or toe region may include the distal, middle, and proximal phalanges of the wearer's foot when worn. The toe portion and / or toe region may further include the front of the metatarsals of the wearer's foot when worn.

[0213] The "forefoot" and / or "forefoot area" of a sole / midsole can refer to the front of the sole / midsole. The forefoot area of ​​a sole / midsole shoe can cover the area of ​​the foot corresponding to the toes and ball of the foot. In one example, the forefoot area can cover less than about the front half of the sole. In one example, the forefoot area can cover less than about one third of the sole at the front of the sole.

[0214] The "midfoot" and / or "midfoot region" of a sole / midsole may refer to the center of the sole / midsole. The midfoot region of a sole / midsole shoe may cover an area of ​​the foot that corresponds to the arch of the foot when a shoe with the sole / midsole is worn. In one example, the midfoot region may cover less than about half of the sole of the foot, with its center point located at about halfway along the heel-toe axis. In one example, the midfoot region may cover less than about one-third of the sole of the foot, with its center point located at about halfway along the heel-toe axis.

[0215] The terms "rearfoot" and / or "rearfoot region" of a sole / midsole can refer to the rear of the sole / midsole. The rearfoot region of a sole / midsole shoe can cover an area corresponding to and / or surrounding the heel of a wearer's foot when a shoe with the sole / midsole is worn. In one example, the rearfoot region can cover less than about the rear half of the sole. In one example, the midfoot region can cover less than about one third of the sole at the rear of the sole.

[0216] The "forefoot" and / or "forefoot area" of a sole / midsole can refer to the front of the sole / midsole. The forefoot of a sole / midsole shoe can cover the area of ​​the foot corresponding to the toes and ball of the foot. In one example, the forefoot can cover less than about the front half of the front of the sole, or less than about one-third of the sole.

[0217] The "sole area" and / or "sole portion" of a sole / midsole as used herein may be determined, for example, in a plane defined by the heel-toe axis and the medial-lateral axis of the sole / midsole. In other words, the sole area / sole portion of a sole / midsole may be measured in a generally horizontal plane perpendicular to the vertical axis. The sole area / sole portion of a sole / midsole may be the area / portion that comes into contact with the bottom of a wearer's foot (disregarding the presence of an upper and / or insole) when a shoe comprising such a sole is worn.

[0218] As used herein, the term "upward" may refer to a direction from the sole portion of the upper toward the top of the upper. For example, the upward direction may refer to a direction from the sole portion of the upper toward the top of the upper. The upward direction may be generally parallel to a vertical axis.

[0219] As used herein, the term "downward" may refer to a direction generally opposite to an upward direction.

[0220] As used herein, the term "vertical axis" may correspond approximately to the wearer's major body axis from head to feet when the wearer is standing on the ground.

[0221] Unless otherwise specified, the term "substantially" as used in this context can be understood as substantially or significantly, or largely or essentially. In particular, manufacturing tolerances are included in this term.

[0222] The term "and / or" is simply an association relationship that describes related objects, and represents that three relationships may exist. For example, A and / or B can represent three states: only A exists, both A and B exist, and only B exists. In addition, the character " / " in the present disclosure generally represents that the previous and next related objects form an "or" relationship.

[0223] Words indicating orientations or positional relationships, such as "bottom," "top," "one end," "other end," "outside," "top," "upper," "inner," "lower," "below," "horizontal," "coaxial," "center," "end," "part," "length," "outer end," and the like, are based on the orientations or positional relationships shown in the drawings.

[0224] The terms "top", "upper", "lower", "below" and the like used in the present invention to indicate relative positions in space are used for ease of description to describe a shoe sole, element, part, object and / or feature shown in the drawings relative to another shoe sole, element, part, object and / or feature.

[0225] Description of the drawings Fig. 1 shows an upper midsole layer 120 of a sole 101 for a shoe, in particular for a sports shoe, according to an embodiment of the present disclosure. Fig. 2 shows a lower midsole layer 125 of a sole 101 for a shoe, in particular for a sports shoe, according to an embodiment of the present disclosure.

[0226] Sole 101 (FIGS. 1 and 2 do not show the entire sole 101 for a shoe, as will be understood by those skilled in the art) comprises a midsole 110 including an upper midsole layer 120 and a lower midsole layer 125. As can be seen, the upper midsole layer 120 and the lower midsole layer 125 are at least partially separate from one another. Sole 101 further comprises a shear structure 130 disposed in midsole 110. Shear structure 130 is configured to allow relative movement between upper midsole layer 120 and lower midsole layer 125.

[0227] The relative movement between the upper midsole layer 120 and the lower midsole layer 125 may occur in a plane defined by the medial-lateral axis ML of the sole 101 and the heel-toe axis HT of the sole 101. In particular, the relative movement between the upper midsole layer 120 and the lower midsole layer 125 may be generally parallel to the heel-toe axis HT of the sole 101. The heel-toe axis HT of the sole 101 and the medial-lateral axis ML of the sole 101 are shown in Figures 1 and 2.

[0228] It should be noted that Figures 1 and 2 depict the upper midsole layer 120 and the lower midsole layer 125 as being separate from one another in the sense that they are separate from one another. Nevertheless, as described in more detail elsewhere, the upper midsole layer 120 and the lower midsole layer 125 may be at least partially separate from one another. For example, the upper midsole layer 120 and the lower midsole layer 125 may be partially attached to one another and / or at least partially formed integrally.

[0229] The shear structure 130 may be configured to enable relative movement between the upper midsole layer 120 and the lower midsole layer 125 in at least one of the forefoot portion 111 of the midsole 110, the midfoot portion 112 of the midsole 110, the rearfoot portion 113 of the midsole 110, the lateral portion of the midsole 110 (near reference number 102 indicating the lateral side of the midsole 110), and / or the medial portion of the midsole 110 (near reference number 103 indicating the medial side of the midsole 110).

[0230] The shear structure 130 may be configured to allow relative movement between the upper midsole layer 120 and the lower midsole layer 125 in at least one of the forefoot portion 111 of the midsole 110 and the midfoot portion 112 of the midsole 110, such as at least one of the lateral forefoot portion 111a of the midsole 110, the medial forefoot portion 111b of the midsole 110, the lateral midfoot portion 112a of the midsole 110, and the medial midfoot portion 112b of the midsole 110. The shear structure 130 may be configured to allow relative movement between the upper midsole layer 120 and the lower midsole layer 125 in the lateral forefoot portion 111a of the midsole 110 and the lateral midfoot portion 112a of the midsole 110.

[0231] 1 and 2, the lateral forefoot portion 111a of the midsole 110 and the lateral midfoot portion 112a of the midsole 110 are shown generally by dashed boxes. As will be appreciated by those skilled in the art, the boxes are general and their exact extent may vary. Additionally, the forefoot portion 111 of the midsole 110, the midfoot portion 112 of the midsole 110, and the rearfoot portion 113 of the midsole 110 are also shown generally with brackets. Similarly, as will be appreciated by those skilled in the art, their exact extent may vary.

[0232] It should be noted that Figures 1 and 2 do not show the entire sole 101. Nevertheless, a portion of the sole 101 is shown, and therefore, for ease of understanding, the reference number 101 is also provided in Figures 1 and 2.

[0233] As can be seen, the shear structure 130 includes an upper shear structure 131 in the upper midsole layer 120 and a lower shear structure 136 in the lower midsole layer 125. When assembled, the upper shear structure 131 and the lower shear structure 136 face each other (as best seen in FIG. 3). As will be understood by those skilled in the art, when the sole 101 is unassembled, the upper shear structure 131 and the lower shear structure 136 do not have to face each other. Furthermore, the upper shear structure 131 and the lower shear structure 136 can be located in any portion 111, 112, 113 of the midsole 110. FIGS. 1 and 2 show that the upper shear structure 131 and the lower shear structure 136 are located in the forefoot portion 111 of the midsole 110 and the midfoot portion 112 of the midsole 110. In particular, as shown by the dashed outlines, upper shear structure 131 and lower shear structure 136 are disposed in a lateral forefoot portion 111a of midsole 110 and a lateral midfoot portion 112a of midsole 110. However, this is by way of example only and various arrangements are encompassed by this disclosure.

[0234] When assembled, the upper shear structure 131 and the lower shear structure 136 at least partially engage with each other (best seen in FIG. 3). Moreover, the upper shear structure 131 and the lower shear structure 136 are shaped to generally correspond to each other. For example, one of the upper shear structure 131 and the lower shear structure 136 can form a geometrically concave form relative to the other. When assembled, the upper shear structure 131 and the lower shear structure 136 engage with each other via a form-fit connection (best seen in FIG. 3). Note that the form-fit connection simply refers to the shape of the upper shear structure 131 and the lower shear structure 136 when substantially no forces are acting on the sole 101. In particular, the form-fit connection should not be confused with a rigid connection. Rather, shear movement is fully encompassed by the form-fit connection, as described in more detail elsewhere herein.

[0235] Additionally, as shown in FIGS. 1 and 2, upper shear structure 131 is integrally formed with upper midsole layer 120 and lower shear structure 136 is integrally formed with lower midsole layer 125 .

[0236] Forming each structure 131, 136 integrally is also known as forming them as one single piece. This can provide several advantages. For example, a single piece can provide increased strength and durability, as it often has fewer weak points and / or less chance of failure, as compared to a multi-piece assembly. This can improve overall strength and durability. Additionally, a single piece can be simpler and easier to manufacture and / or assemble, as separate pieces, fasteners, or connectors may be substantially unnecessary, but this is not excluded. This can reduce manufacturing costs. Additionally, a single piece can reduce the overall weight of the resulting structure and / or product. This can be particularly advantageous in the context of the sole 101 for a shoe proposed herein, where weight reduction can play a key role. Additionally, a single piece can improve performance, as it can reduce wear, vibration, noise, etc. associated with separate moving parts. Furthermore, by eliminating the need for additional parts, pieces, elements, etc., the upper shear structure 131 integrally formed with the upper midsole layer 120 and the lower shear structure 136 integrally formed with the lower midsole layer 125 may reduce material costs, labor costs, and / or assembly time. Additionally, fewer parts can often mean a simpler construction and less material waste during manufacturing and disposal. This can contribute to a more sustainable and environmentally friendly sole 101.

[0237] However, as described elsewhere, separate configurations, i.e., upper shear structure 131 not being integrally formed with upper midsole layer 120 and lower shear structure 136 not being integrally formed with lower midsole layer 125, may also have advantages. For example, providing separate parts instead of providing integrally formed parts may facilitate more complex arrangements. Additionally, additional functionality may be more easily added. Thus, the choice between forming element 131 integrally with element 120 and element 136 integrally with element 125, and providing separate elements, may depend on various factors, such as the intended application, manufacturing process, material properties, desired results, desired functionality, and / or cost considerations.

[0238] It should be noted that a portion of the upper midsole layer 120 and a portion of the lower midsole layer 125 may be fixedly attached to one another. This is recognized as shear movement between the upper midsole layer 120 and the lower midsole layer 125 may require some attachment. The portion of the upper midsole layer 120 and the portion of the lower midsole layer 125 may be fixedly attached to one another by any type of suitable means for attachment, including, but not limited to, one or more and / or combinations of adhesives, bonding, stitching, use of mechanical fasteners, injection molding, welding, heat bonding, compression molding, lamination, foam bonding, direct injection processing, foam encapsulation, molded construction, welded seam bonding, and the like. It should be understood that the selection of the means for attachment may depend on various factors, such as the type of sole 101 for the shoe, the material used, the desired flexibility level, and / or the manufacturing process used. Each means for attachment may provide its own advantages and may be selected based on the particular requirements of the sole 101.

[0239] The size of the areas of the upper midsole layer 120 and the lower midsole layer 125 that are fixedly attached may depend on the size of the shear structure 130, as there may be a maximum allowable frictional force due to relative movement. It is believed that the maximum allowable frictional force may be at least partially increased by fixedly attaching a portion of the upper midsole layer 120 to a portion of the lower midsole layer 125. In one example, at least about 10%, preferably at least 15%, more preferably at least 20%, even more preferably at least 25%, even more preferably at least 30%, even more preferably at least 35%, even more preferably at least 40%, even more preferably at least 45%, even more preferably at least 50% or more of the plantar area of ​​the midsole 110 may be fixedly attached to each other. Alternatively or additionally, up to about 90%, preferably up to 85%, more preferably up to 80%, even more preferably up to 75%, even more preferably up to 70%, even more preferably up to 65%, even more preferably up to 60%, even more preferably up to 55%, even more preferably up to 50% or less of the plantar region of the midsole 110 may be fixedly attached to one another. In Figures 1 and 2, a two-dimensional projection onto a horizontal plane of the illustrated upper midsole layer 120 or the illustrated lower midsole layer 125 may be from the plantar region of the midsole 110.

[0240] It should be noted that when the shear structures 130 are provided in the forefoot portion 111 of the midsole 110, at least a portion of the rearfoot portion 113 of the midsole 110 and / or the midfoot portion 112 of the midsole 110 can be at least partially fixedly attached to one another. In other words, the upper midsole layer 120 and the lower midsole layer 125 can be fixedly attached to one another where the shear structures 130 are not located.

[0241] Figure 3 shows a sole for a shoe, in particular for a sports shoe, according to an embodiment of the present disclosure. Figure 3 shows the embodiment of Figures 1 and 2 in an assembled state.

[0242] The one or more upper protrusions 132 and / or the one or more lower protrusions 137 (shown in more detail in FIG. 4) have a maximum height h perpendicular to the horizontal plane of the sole 101 of at least 2 mm and / or at most 20 mm, as described elsewhere herein.

[0243] 3 also shows that the shear structure 130 includes a hollow space 135. The hollow space 135 is free of the upper midsole layer 120 and / or the lower midsole layer 125. It should be understood that the hollow space 130 may change shape and size under pressure loads applied to the sole 101.

[0244] A hollow space 135 can be formed between one or more upper protrusions 132 when received in one or more lower recesses 138 (and / or between one or more lower protrusions 137 when received in one or more upper recesses 133). Thereby, the hollow space 135 can adopt a shape similar to the lines described elsewhere herein (e.g., zigzag lines, sawtooth lines, etc.). This can have the further advantage of improving ventilation, cooling, aesthetics, function, etc. For example, the wearer's foot can be better ventilated to reduce moisture buildup. This also improves the lifespan of the sole 101. In addition, if the hollow space 135 is fully exposed to the outside, the hollow space may be designed such that disturbing objects from the environment, such as pebbles, cannot essentially accumulate within the hollow space and / or cannot protrude through the hollow space, thereby not reducing the wearer's performance and / or distracting the wearer.

[0245] Additionally, the shear structure 130 may include a solid material, such as a foam material. In the embodiment of Figure 3, this may be understood as the portion of the upper shear structure 131 integrally formed with the upper midsole layer 120 including a solid material, such as a foam material. Additionally, the portion of the lower shear structure 136 integrally formed with the lower midsole layer 125 also includes a solid material, such as a foam material.

[0246] 3 also shows that the shear structures 130 are at least partially visible when viewed from the outside. In particular, the shear structures 130 are visible from the lateral side 102 of the midsole 110 (as shown in FIG. 3) and / or the medial side 103 of the midsole 110. The shear structures may have a sawtooth shape 139 when viewed from the outside, preferably when viewed from the lateral side 102 of the midsole 110 and / or the medial side 103 of the midsole 110. In FIG. 3, the viewing direction may be from the lateral forefoot portion 111a of the midsole 110. Visibility of the shear structures 130 may be particularly important and advantageous as the condition of the shear structures 130, such as solidity, firmness, etc., may be easily assessable.

[0247] One or more of the protrusions 132, 137 (shown in detail in FIG. 4) may have a sloping surface, as shown in FIG. 3, toward the adjacent recess 133, 138 when viewed along the heel-toe axis HT, and the sloping surface may be generally continuous.

[0248] 3, the sole 101 may further comprise an outsole disposed below the midsole 110, preferably below the lower midsole layer 125. As will be appreciated, the sole 101 described herein may be attached to an upper to form a shoe, particularly a sports shoe such as a running shoe. The upper may be attached to the sole 101 by any suitable means of attachment, including but not limited to bonding / gluing, stitching, injection molding, and the like.

[0249] FIG. 4 is a detailed view of FIGS.

[0250] As can be seen, the upper shear structure 131 includes one or more upper protrusions 132 and the lower shear structure 136 includes one or more lower recesses 138. Additionally, the lower shear structure 136 includes one or more lower protrusions 137 and the upper shear structure 131 includes one or more upper recesses 133. The upper protrusions 132 can extend from the lateral side 102 of the midsole 110 to about a centerline 106 (shown as a dashed line at the top of FIG. 2 ) of the midsole 110, the centerline 106 being generally parallel to a heel-toe axis HT of the sole 101. Similarly, the upper recesses 133, the lower protrusions 137, and / or the lower recesses 138 can also extend from the lateral side 102 of the midsole 110 to about the centerline 106 of the midsole 110. As described elsewhere herein, when the shear structures 130 are located on the medial side 103, the projections 132, 137 and / or recesses 133, 138 can extend from the medial side 103 of the midsole 110 to about the centerline 106 of the midsole 110. However, as described elsewhere herein, several different arrangements of the shear structures 130 are possible.

[0251] When assembled, the one or more upper projections 132 are at least partially received in the one or more lower recesses 138. Additionally, when assembled, the one or more lower projections 137 are at least partially received in the one or more upper recesses 133 (best seen in FIG. 3).

[0252] In Fig. 4, the one or more upper projections 132 and / or the one or more lower projections 137 are shown spaced apart from one another when viewed in the horizontal plane of the sole. In Fig. 4, a spacing w is shown along the heel-toe axis HT of the sole 101.

[0253] The one or more upper projections 132 and / or the one or more lower projections 137 may be spaced apart from one another by a distance w when viewed along the heel-toe axis HT of the sole 101, wherein the distance w is at least 1 cm, preferably at least 1.5 cm, more preferably at least 2 cm, even more preferably at least 2.5 cm, and most preferably at least 3 cm, and / or w is at most 8 cm, preferably at most 6 cm, more preferably at most 5 cm, even more preferably at most 4 cm, even more preferably at most 3.5 cm, and most preferably at most 3 cm.

[0254] The upper projection(s) 132 and the upper recess(es) 133 are arranged alternately when viewed along the heel-toe axis HT of the sole 101. The same applies to the lower projection(s) 137 and the lower recess(es) 138.

[0255] In one example, one or more upper protrusions 132 and one or more upper recesses 133 may be arranged arbitrarily. This may have the advantage that the protrusions 132 and recesses 133 may be arranged to increase shear if desired in some applications of the sole 101. As will be appreciated, the arrangement of the upper protrusions 132 and upper recesses 133 may vary depending on the type of sole 101 and its use case.

[0256] The one or more upper lugs 132 and / or the one or more lower lugs 137 have an elongated shape with a longitudinal axis generally parallel to the medial-lateral axis ML of the sole 101 .

[0257] The one or more upper projections 132 and / or the one or more lower projections 137 have a shape when viewed in a horizontal plane of the sole 101 that includes one or more of a line segment defined by a mathematical function, in particular a periodic mathematical function such as a sine wave, a zigzag line segment, or a sawtooth line segment. In FIG. 4, the shape is a zigzag or sawtooth shape.

[0258] Without wishing to be bound by theory, it is believed that these shapes allow for improved control of movement of the one or more upper projections 132 and / or the one or more lower projections 137. For example, movement along the medial-lateral axis ML can be substantially prevented by the interlocking of the corresponding shapes. Nevertheless, shear movement along the heel-toe axis HT is still possible by the shear structure 130. Thus, the kinetic energy can be significantly reduced. In this way, the contribution of the shear structure 130 from shear movement and its corresponding friction and heat generation can be large compared to the solid deformation, although it is still possible that the deformation of the internal solid also contributes to the reduction of the kinetic energy. In addition, a clear stop can be provided along the heel-toe axis HT of the sole 101. This can improve safety because there is a clear stop, preventing instability of the sole 101. All these advantages can be equally applied to the shapes as defined herein. The shapes can be understood in more detail as follows.

[0259] The zigzag lines may be a pattern or path characterized by a series of generally sharp angles or abrupt turns. The pattern or path may create a repeating "Z" shape and / or a series of interconnected diagonal lines. Next to the added benefit of this feature, the zigzag lines may also contribute to the appearance and / or haptics of the protrusions 132, 137.

[0260] A sawtooth line may be a geometric pattern or wave shape that may resemble the teeth of a saw blade. A sawtooth line may be characterized by a series of linear jagged peaks and valleys. Each peak may form an acute angle and each valley may form a corresponding acute angle in the opposite direction. This may create a repeating pattern that may resemble sawtooth.

[0261] It should be noted that the line segments defined by the mathematical functions can also contribute to enhancing the benefits of the protrusions 132, 137.

[0262] Additionally, any type of shape for the one or more upper protrusions 132 and / or the one or more lower protrusions 137 may be encompassed by the present disclosure, such as one or more of the following non-exhaustive list: rectangular, triangular, any periodic function, any form that allows for horizontal movement of the upper midsole layer 120 and the lower midsole layer 125.

[0263] As shown in FIG. 4, the upper shear structure 131 can have five protrusions 132. The leftmost protrusion 132 has two zigzags or sawtooths. The middle three protrusions 132 have three zigzags or sawtooths. The rightmost protrusion 132 has two zigzags or sawtooths. As will be appreciated by those skilled in the art, the number may vary slightly depending on what exactly can be understood as one zigzag or sawtooth. As shown in the bottom of FIG. 4, the number of zigzags or sawtooths on the lower protrusion 137 is similar to the number of zigzags or sawtooths on the upper protrusion 132.

[0264] The one or more upper projections 132 and / or the one or more lower projections 137 include one or more side surfaces 134 (for simplicity, only one side surface 134 is shown). A normal to the side surface 134 may be approximately parallel to a horizontal plane of the sole 101. As shown in FIG. 4, the side surface 134 is inclined with respect to the medial-lateral axis ML of the sole 101 (further shown by a dashed line at the bottom of FIG. 4). As described elsewhere herein, the angle α may be at least 5° and / or at most 80°. A preferred range for the angle α may be from about 30° to about 60°.

[0265] Note that the brackets around reference number 130 indicate that upper shear structure 131 and lower shear structure 136 are included in shear structure 130.

[0266] Figure 5 shows a sole plate 140 of a sole 101 for a shoe, in particular for a sports shoe, according to an embodiment of the present disclosure, from two different sides. The upper part of Figure 5 shows the sole plate 140 with the upper surface 141 of the sole plate 140 facing the viewing direction. The lower part of Figure 5 shows the sole plate 140 with the lower surface 142 of the sole plate 140 facing the viewing direction.

[0267] During assembly of the sole 101, the sole plate 140 is provided between the upper midsole layer 120 and the lower midsole layer 125. The sole plate 140 is configured to control relative movement between the upper midsole layer 120 and the lower midsole layer 125.

[0268] The sole plate 140 can be attached to the upper midsole layer 120 and / or the lower midsole layer 125. Any type of suitable means for attachment is possible and encompassed by this disclosure. In one example, the sole plate 140 can be bonded to the upper midsole layer 120 and / or the lower midsole layer 125. In another example, the sole plate 140 can be generally attached to the upper midsole layer 120 and / or the lower midsole layer 125 by meshing, form-fitting, or the like. This can be combined with additional means for attachment, such as fasteners, adhesives, or the like.

[0269] In one example, the sole plate 140 may comprise TPU, which may provide good sustainability, provide high flexibility and exhibit improved longitudinal bending behavior. However, alternatively or in addition, the sole plate 140 may comprise different materials, including but not limited to rubber, plastic, or metal. The choice of material may depend on the type of shoe and its intended use.

[0270] The sole plate 140 includes protrusions 144 and / or recesses 143 that engage corresponding recesses 126 (best seen in FIG. 2) and / or protrusions 121 (best seen in FIG. 1) provided in the lower midsole layer 125 and / or upper midsole layer 120.

[0271] The projections 144 of the sole plate 140 are at least partially hollow and / or at least partially filled with foam. The sole plate 140 is elongated and aligned along a heel-toe axis HT of the sole 101. Also, the recesses 126 and / or projections 121 in the lower midsole layer 125 and / or upper midsole layer 120 are elongated and aligned along the heel-toe axis HT of the sole 101. The recesses 143, 126 and / or projections 144, 121 have a generally semicircular or arcuate profile when viewed along the heel-toe axis HT.

[0272] The profile of an arc may be a two-dimensional geometric shape formed by taking a portion of the circumference of a circle and a chord (a straight line segment connecting two points on the circumference of the circle) across the arc of the arc. In essence, the arc may be the curved area between the arc and the two radii (lines connecting the center of the circle to the endpoints of the arc) that define the arc.

[0273] In one example, the recess 143 can be provided on the upper surface 141 of the sole plate 140. In one example, the protrusion 144 can be provided on the lower surface 142 of the sole plate 140. The recess 143 and / or the protrusion 144 can be integrally formed with the sole plate 140. In another example, the recess 143 and / or the protrusion 144 can be attached by adhesion, such as by gluing.

[0274] 5 also shows that the sole plate 140 includes a stop element 145 disposed obliquely relative to the projections 144 and / or recesses 143 of the sole plate 140. The stop element 145 is disposed in the toe portion 111c of the forefoot portion 111 of the midsole 110 (schematically indicated by brackets in FIG. 5).

[0275] As can be imagined by the recess 126 in the lower midsole layer 125 shown in Figure 2, the sole plate 140 extends along the entire length I of the shear structure 130 (best seen in Figure 4) when viewed at the heel-toe axis HT of the sole 101. Note that the entire length I of the shear structure 130 is shown diagrammatically in Figure 4.

[0276] 6 shows an upper midsole layer 120 and a lower midsole layer 125 of a sole 101 for a shoe, in particular for a sports shoe, according to an embodiment of the present disclosure, as well as a sole plate 140 of a sole 101 for a shoe. The embodiment shown in FIG. 6 is similar to any other embodiment described in the present disclosure, meaning that any feature described in any other embodiment may also be applicable to the embodiment of FIG. 6, as long as it is technically meaningful. Vice versa. Please note that, merely for the sake of brevity, not all features of the other embodiments are repeated and / or shown in the embodiment of FIG. 6.

[0277] The sole 101 (FIG. 6 does not show the entire sole 101 for a shoe, as will be understood by those skilled in the art) comprises a midsole 110 including an upper midsole layer 120 and a lower midsole layer 125. The upper midsole layer 120 and the lower midsole layer 125 are at least partially separate from one another. The sole 101 further comprises a shear structure 130 disposed in the midsole 110. The shear structure 130 is configured to permit relative movement between the upper midsole layer 120 and the lower midsole layer 125, preferably along a heel-toe axis HT.

[0278] As can be seen, the shear structure 130 includes an upper shear structure 131 in the upper midsole layer 120 and a lower shear structure 136 in the lower midsole layer 125. When assembled, the upper shear structure 131 and the lower shear structure 136 face each other.

[0279] The sole 101 further comprises a sole plate 140 that is provided between the upper midsole layer 120 and the lower midsole layer 125 during assembly of the sole 101. The sole plate 140 is configured to control the relative movement between the upper midsole layer 120 and the lower midsole layer 125. The sole plate 140 includes a stop element 145 that is disposed obliquely with respect to a heel-toe axis HT of the sole plate 140. The stop element 145 is disposed in the toe portion of the forefoot of the midsole 110.

[0280] FIG. 7 shows a shoe 100, in particular a sports shoe, comprising a sole 101 and a sole plate 140 according to an embodiment of the present disclosure. FIG. 7 shows the shoe 100 from the lateral side 102. FIG. 7a shows the embodiment of FIG. 7 from the medial side 103. The embodiment shown in FIG. 7 is similar to any other embodiment described in the present disclosure, meaning that any feature described in any other embodiment may also be applicable to the embodiment of FIG. 7, as long as it makes technical sense. Vice versa applies. It should be noted that, merely for the sake of brevity, not all features of the other embodiments are repeated and / or shown in the embodiment of FIG. 7. The shoe 100 in FIG. 7 is shown in an assembled state. The illustrated shoe 100 may be a sports shoe, such as a running shoe, in particular a shoe for downhill running. The shoe 100 comprises a sole 101 according to any one of the embodiments described herein. Furthermore, the shoe 100 comprises an upper 150 attached to the sole 100. As in the previously described embodiments, the sole 101 of the embodiment of Figure 7 comprises a midsole 110 including an upper midsole layer 120 and a lower midsole layer 125. The sole 101 further comprises a shear structure 130 disposed in the midsole 110. The shear structure 130 is configured to allow relative movement between the upper midsole layer 120 and the lower midsole layer 125, preferably along a heel-toe axis HT. The shear structure 130 includes an upper shear structure 131 in the upper midsole layer 120 and a lower shear structure 136 in the lower midsole layer 125. The upper shear structure 131 and the lower shear structure 136 are opposed to each other.

[0281] Additionally, one or more upper protrusions 132 and one or more lower protrusions 137 are shown in Figures 7 and 7a (for simplicity, not all protrusions are shown). Additionally, the sole 101 comprises a sole plate 140 disposed between the upper midsole layer 120 and the lower midsole layer 125. As best seen in Figure 7a, the sole plate 140 is visible from the outside of the shoe 100.

[0282] In any of the embodiments of the sole 101 for a shoe described herein, the upper midsole layer 120 can include a first material and the lower midsole layer 125 can include a second material, where the first material is different from the second material or the first material is substantially the same as the second material.

[0283] By way of example, the first material and the second material may have different stiffnesses, which may improve the distribution of forces on the outsole of the sole 101 and / or on the ground.

[0284] "Stiffness" as referred to herein can be understood as hardness or elastic modulus. Stiffness can refer to the ability of a material to withstand deformation when a force is applied. Stiffness can describe how much a material will flex or stretch in response to an applied load. A material with higher stiffness may be less likely to deform under the same load compared to a material with lower stiffness. Stiffness is measured by Young's modulus, which quantifies the relationship between stress (force per unit area) and strain (deformation). Stiffness can often be associated with the ability of a material to maintain its shape and withstand bending or flexing.

[0285] In any of the embodiments of the sole 101 for a shoe described herein, the midsole 110, in particular the upper midsole layer 120 and / or the lower midsole layer 125, comprises or consists of a particle foam material, in particular a particle foam material comprising particles of expanded thermoplastic polyurethane (eTPU), particles of expanded polyamide (ePA), particles of expanded polyether block amide (ePEBA), and / or particles of expanded thermoplastic polyester ether elastomer (eTPEE).

[0286] In any of the embodiments of the sole 101 for a shoe described herein, the midsole 110, in particular the upper midsole layer 120 and / or the lower midsole layer 125, comprises or consists of a homogenous foam material.

[0287] Homogeneous foam materials or homogeneous foams are known to those skilled in the art. In some cases, such foams are called polymer foams or plastic foams. These foams are produced, for example, by injection molding or compression molding. When using a mold, a liquefied polymer material, which may contain a blowing agent, is usually placed in the mold cavity, and the process of foaming the polymer material takes place in the mold cavity. Homogeneous foams usually do not have a recognizable granular structure, i.e., they have almost no identifiable particles in the finished foam.

[0288] On the other hand, particle foam materials or particle foams are different compared to homogeneous foams. To produce particle foams, in a first step, expanded particles (or beads) are made from an expanded particulate substrate. Then, in a second step, these expanded beads can be collected to form a coherent structure in which the individual particle boundaries are recognizable, i.e. clearly visible, in the finished foam. Expanded in this context means that each individual particle has a core of expanded material with many small foam cells, i.e. the particle cannot be composed of a dense solid material.

[0289] It should be noted that, as will be understood by those skilled in the art, any one or more of the embodiments and / or examples described herein may be combined with further aspects described herein, and details of the embodiments and / or examples may be omitted. The scope of protection is determined by the claims and is not limited by the embodiments and / or examples disclosed in the above drawings. [Explanation of symbols]

[0290] 100 Shoes 101 Shoe soles 102 Outer side of midsole 103 Inner side of midsole 106 Midsole centerline 110 Midsole 111 Midsole forefoot 111a Midsole outer forefoot 111b Midsole medial forefoot 111c Midsole forefoot toe area 112 Midsole midfoot 112a Midsole lateral midfoot 112b Medial midfoot part of midsole 113 Rear part of midsole 120 Upper midsole layer 121 Upper midsole layer protrusion 125 Lower midsole layer 126 Lower midsole layer recess 130 Shear structure 131 Upper shear structure 132 Upper projection 133 Upper recess 134 One or more sides of the upper and / or lower protrusions 135 Hollow Spaces in Shear Structures 136 Lower shear structure 137 Lower protrusion 138 Lower recess 139 Sawtooth Shape of Shear Structure w Spacing between upper and / or lower projections h the height of one or more of the upper projections and / or lower projections I Total length of shear structure 140 Soleplate 141 Top of sole plate 142 Underside of sole plate 143 Soleplate recess 144 Sole plate protrusion 145 Stop Elements 150 Shoe upper HT Heel-toe axis of sole (longitudinal direction) ML Sole medial-lateral axis UD upward direction DD upward direction α angle between the side of the sole and the medial-lateral axis

Claims

1. A sole for a shoe, the sole comprising: a midsole including an upper midsole layer and a lower midsole layer, the upper midsole layer and the lower midsole layer being at least partially separate from one another; Shear structure placed in the midsole Equipped with A sole for a shoe, the shear structure being configured to allow relative movement between an upper midsole layer and a lower midsole layer.

2. 2. The sole for shoes according to claim 1, wherein the relative movement between the upper midsole layer and the lower midsole layer occurs within a plane defined by a medial-lateral axis (ML) of the sole and a heel-toe axis (HT) of the sole.

3. 2. The sole for a shoe of claim 1, wherein the shear structure is configured to allow relative movement between the upper midsole layer and the lower midsole layer in at least one of a forefoot portion of the midsole, a midfoot portion of the midsole, a rearfoot portion of the midsole, a lateral portion of the midsole, and a medial portion of the midsole.

4. The sole for shoes according to claim 1 , wherein the shear structure includes an upper shear structure of the upper midsole layer and a lower shear structure of the lower midsole layer, the upper shear structure and the lower shear structure facing each other.

5. The sole for a shoe according to claim 4 , wherein the upper shear structure and the lower shear structure at least partially engage with each other.

6. The sole for shoes according to claim 4 , wherein the upper shear structure and the lower shear structure are molded to correspond substantially to each other.

7. The sole for a shoe according to claim 4 , wherein the upper shear structure and the lower shear structure engage one another via a form-fit connection.

8. The sole for a shoe according to claim 4 , wherein the upper shear structure is integrally formed with the upper midsole layer and the lower shear structure is integrally formed with the lower midsole layer.

9. the upper shear structure includes one or more upper protrusions, the lower shear structure includes one or more lower recesses, and / or The sole for a shoe according to claim 1 , wherein the lower shear structure comprises one or more lower projections and the upper shear structure comprises one or more upper recesses.

10. one or more upper projections are at least partially received in one or more lower recesses; and / or The sole for a shoe according to claim 9, wherein the one or more lower projections are at least partially received in the one or more upper recesses.

11. Sole for shoes according to claim 9, wherein the upper lugs or lugs and / or the lower lugs or lugs (137) are spaced apart (w) from one another when viewed in the horizontal plane of the sole.

12. Sole for shoes according to claim 11, wherein the upper lugs or lugs and / or the lower lugs or lugs are spaced apart (w) from one another when viewed in the horizontal plane of the sole.

13. The sole for shoes according to claim 9, wherein one or more upper protrusions and one or more upper recesses are arranged.

14. 10. The sole for shoes according to claim 9, wherein the one or more upper projections and / or the one or more lower projections have an elongated shape.

15. 10. The sole for a shoe according to claim 9, wherein the one or more upper projections and / or the one or more lower projections have a shape, when viewed in a horizontal plane of the sole, that includes one or more line segments defined by a mathematical function.

16. The sole for shoes according to claim 9, wherein the one or more upper projections and / or the one or more lower projections include one or more side surfaces, the normal of the side surfaces being approximately parallel to the horizontal plane of the sole, and the side surfaces being inclined with respect to the medial-lateral axis (ML) of the sole.

17. 10. Sole for shoes according to claim 9, wherein the upper projection or projections and / or the lower projection or projections have a maximum height (h), perpendicular to the horizontal plane of the sole, of at least 2 mm.

18. The sole for shoes according to claim 1 , further comprising a sole plate provided between the upper midsole layer and the lower midsole layer and configured to control relative movement between the upper midsole layer and the lower midsole layer.

19. 20. Sole for a shoe according to claim 18, wherein the sole plate comprises protrusions and / or recesses which engage corresponding recesses and / or protrusions provided in the lower midsole layer and / or the upper midsole layer.

20. Sole for shoes according to claim 18, wherein the projections of the sole plate are at least partially hollow and / or at least partially filled with foam.

21. The sole for shoes according to claim 18, wherein the sole plate is elongated and arranged along a heel-toe axis (HT), and the depressions and / or protrusions provided in the lower midsole layer and / or the upper midsole layer are also elongated and arranged along the heel-toe axis (HT) of the sole.

22. 20. The sole for shoes according to claim 18, wherein the depressions and / or protrusions of the sole plate have a substantially semicircular or arcuate outline.

23. 20. Sole for shoes according to claim 18, wherein the sole plate comprises stop elements arranged obliquely relative to the projections and / or recesses of the sole plate.

24. Sole for a shoe according to claim 18, wherein the sole plate extends along the entire length (I) of the shear structure when viewed on the heel-toe axis (HT) of the sole.

25. The sole for a shoe according to claim 1 , wherein the shear structure comprises a hollow space.

26. The sole for a shoe according to claim 1 , wherein the shear structure comprises a solid material.

27. The sole for shoes according to claim 1 , wherein the shear structure is at least partially visible when viewed from the outside.

28. The sole for shoes according to claim 1 , wherein the shear structure has a sawtooth shape when viewed from the outside.

29. the upper midsole layer comprises a first material and the lower midsole layer comprises a second material; The first material is different from the second material, or The sole for a shoe according to claim 1 , wherein the first material is substantially the same as the second material.

30. 2. The sole for a shoe according to claim 1, wherein the midsole comprises or consists of a particle foam material comprising particles of expanded thermoplastic polyurethane (eTPU), particles of expanded polyamide (ePA), particles of expanded polyether block amide (ePEBA), and / or particles of expanded thermoplastic polyester ether elastomer (eTPEE).

31. The sole for a shoe according to claim 1 , wherein the midsole comprises or consists of a homogenous foam material.

32. The sole for shoes according to claim 1 , wherein a portion of the upper midsole layer and a portion of the lower midsole layer are fixedly attached to each other.

33. The sole for a shoe according to claim 1 , wherein the sole further comprises an outsole disposed below the midsole.

34. A shoe, The sole for shoes according to claim 1 , The upper attached to the sole and Shoes that are equipped with

35. A sole for a shoe, the sole comprising: A midsole including an upper midsole layer and a lower midsole layer, the upper midsole layer and the lower midsole layer being integrally formed; a shear structure disposed in the midfoot portion of the midsole and / or the forefoot portion of the midsole; Equipped with A sole for a shoe, the shear structure being configured to allow relative movement between an upper midsole layer and a lower midsole layer.

36. 1. A method for manufacturing a sole for a shoe, the method comprising: Providing a midsole including an upper midsole layer and a lower midsole layer, the upper midsole layer and the lower midsole layer being at least partially separate from one another; providing a shear structure disposed in the midsole; Including, The method, wherein the shear structure is configured to allow relative movement between the upper midsole layer and the lower midsole layer.

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