Midsole with shear structure for footwear and method of making same

Abstract

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 different from each other; and, a shear structure (130) arranged in the midsole (110); wherein the shear structure (130) is configured to allow relative movement between the upper midsole layer (120) and the lower midsole layer (125).

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 to allow relative movement between an upper midsole layer and a lower midsole layer of the sole. The present disclosure also relates to a corresponding shoe comprising such a sole. Furthermore, the present disclosure relates to a corresponding method for manufacturing a sole for a shoe. Background Art

[0002] Soles for shoes, particularly for sports shoes such as running shoes, are well known, have various uses and usages, and have become increasingly popular among individuals. The soles usually have several different functions in order to be more attractive to the individual.

[0003] For example, the sole is usually used for protection purposes, for example, to protect the wearer's foot from interference or obstruction from foreign objects, such as sharp or pointed objects that the wearer may step on. In addition, the sole used for shoes usually helps to buffer the impact force generated when the foot hits. The sole also provides adhesion friction to avoid the wearer's foot from slipping. In addition, the sole usually provides a certain degree of stability for the wearer's foot, thereby reducing the risk of twisting its ankle or other types of injuries, such as plantar fascia injuries or muscle overloads. Another function of the sole (particularly for performance shoes similar to running shoes) is to facilitate the good transmission of force from the athlete's legs through their feet to the ground, and to facilitate an effective running method to improve the athlete's athletic performance. In addition, especially for sports shoes, the athlete's foot should be fully buffered so as to reduce the impact and load on the athlete's joints. In addition, the sole should be as light as possible, so as to further help reduce the athlete's energy consumption, which is relevant for example at a long distance.

[0004] Some particularly relevant requirements in this context are that, on the one hand, a high degree of cushioning and stability should be achieved in order to reduce the risk of injuries and make sports activities more comfortable. On the other hand, a high energy return should be ensured in order to simultaneously reduce the energy required by the athlete.

[0005] In this context, the following exemplary prior art documents may be mentioned.

[0006] Prior art document US2004 / 0154188A1 relates to a sports shoe midsole, which includes a hard elastic stabilizing member extending generally around a central opening, and a relatively soft elastic cushioning layer extends downward from the center of the wearer's heel below the calcaneus through the central opening 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 extends into a depression in the heel cushioning post, aligned with the flexion line of the heel area, thereby affecting the flexing properties of the heel area of ​​the shoe. The midsole may also include flexion grooves, channels and / or notches aligned with the flexion line to promote the desired flexing properties in the heel area of ​​the sole, and to help slow the wearer's heel-toe gait during the stance phase of the wearer's gait cycle.

[0007] Prior art document WO2023 / 005966A1 relates to sports shoes and a midsole system, the midsole system comprising: a first midsole, the first midsole being made of a cushioning material; an outsole, a cushioning space being formed between the first midsole and the outsole; an elastic member, which is located in the cushioning space, and the elastic member can be elastically deformed along the arrangement direction of the first midsole and the outsole; the elastic member has a foot portion located in the heel area of ​​the midsole system and a forefoot portion located in the forefoot area of ​​the midsole system. The cushioning method of the first midsole is material cushioning, and the cushioning method of the elastic member is structural cushioning; in the use of the midsole system, both the first midsole and the elastic member can absorb the impact force from the ground (the impact force along the arrangement direction of the outsole and the first midsole), thereby effectively improving the cushioning performance and rebound performance of the midsole structure.

[0008] Prior art document US2022 / 0312891A1 relates to a sole structure, which includes a first midsole part, a second midsole part arranged below the first midsole part, and a support plate, which is stacked between the first midsole part and the second midsole part, arranged at a position corresponding to at least a rear foot part, and has a higher stiffness than the first midsole part and the second midsole part. The support plate includes: a base having a corrugated shape, the corrugated shape having at least one crest and at least one trough; and first and second support parts, which have a corrugated shape and branch separately from each other from a peripheral edge part located on the inner side of the base toward the first midsole part and the second midsole part. The trough portion of the second support part is arranged at a position corresponding to the load-bearing protrusion.

[0009] Other prior arts are disclosed in DE 10244435 B4, US 8387279 B2, US 8453344 B2, CN 218898566U, CN 112716098A, US2021 / 0227927 A1, US11000094 B2, US 8863407B2, US11470912B2, US11510457B2 and US4614046A.

[0010] The proposed solutions still have some drawbacks when it comes to providing the needs indicated above. For example, most known solutions focus on heel strikes and require bulky additional components for cushioning. Furthermore, they do not produce optimal results for energy return. Furthermore, high performance lightweight foams can provide more deformation and therefore provide cushioning, however, the higher energy return associated with these foams adversely affects the load on the athlete's knees, etc.

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

[0012] The above objectives are at least partially achieved by the embodiments of the present application, and other suitable aspects of the present invention are described through the overall disclosure of the present application.

[0013] Soles for shoes

[0014] In one aspect, the object is solved by a sole for a shoe, in particular for a sports shoe, such as a running shoe, comprising: a midsole, the midsole comprising an upper midsole layer and a lower midsole layer, the upper midsole layer and the lower midsole layer being at least partially different from each other; and a shear structure, which is arranged in the midsole; wherein the shear structure is configured to allow relative movement between the upper midsole layer and the lower midsole layer.

[0015] In this way, the sole for shoes, particularly for sports shoes, helps to improve the cushioning of the wearer, which is useful for any type of sports activities. At the same time, sufficient energy return can be achieved, although it will not reach the level that adversely affects the running experience. The improved cushioning reduces the load and impact on any joint of the wearer. Thus, the risk of injury can be significantly reduced. For example, the impact on the knee and ankle joints can be reduced, which is important, for example, during downhill running. In addition, since the overall impact can be weakened, muscle damage and fatigue can be reduced. Therefore, the wearer can continue for a longer time and / or have better results to carry out any sports activities. It has been found that these advantages are particularly evident after the first ground contact and / or the first ground contact of the sole. Thus, the force, particularly the horizontal force, can be reduced. In short, this may lead to a reduction in kinetic energy, as described elsewhere herein.

[0016] Without wishing to be bound by theory, it is believed that the advancement of the sole as proposed herein is based inter alia on the following principle. The relative movement of the upper mid-bottom layer and the lower mid-bottom layer may cause the upper mid-bottom layer and the lower mid-bottom layer to slide. Such sliding may result in friction forces that are opposite to the sliding direction. For example, the forces generated due to sliding friction may act against the direction of the sliding motion. Sliding friction may generally be referred to as solid body friction.

[0017] Sliding friction may include static friction, rolling friction and / or dynamic friction. Therefore, although some relative motion is allowed by the shear structure, at the same time, the degree of relative motion can be controlled. The relative motion itself can provide some delay in the force acting on the wearer's foot and thereby the wearer's joints and / or muscles. This delay can reduce the peak force acting on the wearer's foot and thereby the wearer's joints and / or muscles. This reduces the overall impact on the wearer. At the same time, the force generated by friction also contributes to the "softer" feeling when the wearer's foot contacts the ground. This improves cushioning and reduces the load on the wearer. It is possible that the shear structure allows the reduction of horizontal forces generated due to relative motion. This may mean that the shear structure is configured to weaken horizontal forces. In this example, the shear structure may 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 direction, such as forces acting substantially parallel to the vertical axis, such as forces in the upward and / or downward directions, may also be weakened. As understood by those skilled in the art, combinations of force vectors may also be weakened. In short, relative motion may help reduce kinetic energy. This increases the cushioning effect. This can result in a reduced load on the wearer's joints, which makes wearing the shoe more comfortable, for example during running.

[0018] In addition to the above-mentioned sliding friction caused by relative motion, the relative motion can also provide internal friction. Internal friction can be understood as friction within the material of the midsole including the upper and lower midsole layers. Without wishing to be bound by theory, it is believed that internal friction can be caused by the toughness of the material of the midsole including the upper and lower midsole layers, etc. For example, relative motion can allow deformation of the upper and lower midsole layers and / or the lower midsole layers. Such deformation may cause internal friction. This can also help reduce kinetic energy, which increases the cushioning effect, as described elsewhere herein.

[0019] Friction, in particular friction due to relative motion between the upper mid-bottom layer and the lower mid-bottom layer, can lead to the generation of heat. This friction helps to reduce kinetic energy, with the advantages associated therewith, as mentioned elsewhere and in particular in the foregoing. This may be important, for example, during downhill running. However, this is also important in any other type of sports activity.

[0020] In most prior art solutions, high performance foams are typically used, which have weak parts so that deformation may occur. However, these foams still provide a fairly high energy return, which may negatively affect the forces on the wearer's joints. The inventors have found a way to overcome these problems - according to the sole for a shoe as described herein and in particular due to the shear structure.

[0021] 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 portion of a shoe that contacts the ground, and the upper of a shoe, e.g., the portion of a shoe that covers the top of a wearer's foot.

[0022] As used herein, the upper middle bottom layer and the lower middle bottom layer are at least partially "different from each other" and can be understood to make the upper middle bottom layer and the lower middle bottom layer at least partially represent two different entities that can be separated, different and / or distinguishable from each other. This means that there is at least a partial difference in characteristics, quality and / or function, which allows the upper middle bottom layer and the lower middle bottom layer to be distinguished from each other. These differences are obvious to the technician. In one example, the upper middle bottom layer and the lower middle bottom layer can be unique to a certain extent. However, in the case where the upper middle bottom layer and the lower middle bottom layer can be distinguishable in terms of their functions, it is possible that the upper middle bottom layer and the lower middle bottom layer may not always be able to be distinguished from each other by visual inspection only. In addition, the upper middle bottom layer and the lower middle bottom layer are at least partially "different from each other" and may not exclude that they contain the same material and / or they are at least partially attached to each other. In addition, it is also not excluded that the upper middle bottom layer and the lower middle bottom layer are formed integrally, as long as they can be distinguished from each other. In addition, since the upper middle bottom layer and the lower middle bottom layer are "at least partially" different from each other, this can include: they are partially attached to each other and / or at least partially formed integrally.

[0023] The term "shear structure" used here can be understood as providing a structure that facilitates shearing. It should be noted that the size of the shear structure can be unlimited to provide progress as described herein. However, those skilled in the art can recognize that the shear structure is such a shear structure without the need for research efforts. This is implied by the term "structure". For example, the shear structure can be understood as having a macroscopic size. The shear structure may not only be impurities of the material (such as foam) of the midsole and / or just microscopic gas inclusions. The latter example may appear unintentionally and may not correspond to the shear structure. It should be understood that the shear structure is particularly provided with the intention of allowing the upper mid-bottom layer and the lower mid-bottom layer to move relative to each other in a substantial manner. In addition, the shear structure can be identifiable to allow such a function. This recognition can be performed from a visual and / or functional perspective. For example, the shear structure can be visible, and / or the shear structure can be distinguished from other parts due to its function (as described herein).

[0024] As used herein, the term "shear" may be understood as making two or more elements, parts, components, layers, etc., such as two adjacent parts of a body slide against each other. As understood in the context of the present disclosure, two elements, parts, components, layers, etc. may be an upper mid-bottom layer and a lower mid-bottom layer. The term shear may mean that the upper mid-bottom layer and the lower mid-bottom layer slide in opposite directions. In addition, they may slide relative to each other in a direction parallel to their contact plane or expected contact plane, or in a direction parallel to the plane between the two layers when the two layers are spaced apart from each other. They may slide in the same direction, but slide to different degrees. Although the two layers may contact each other, it is also fully encompassed that there is space between the two layers when they slide relative to each other. The space may be filled at least in part by a shear structure. Shearing may be caused by the action or stress generated by an applied force (such as a force caused by the wearer's load). Relative motion may occur under a pressure load on the sole. It should be noted that shearing may occur in any kind of direction, preferably, shearing occurs substantially parallel to the heel-to-toe axis of the sole.

[0025] The term "structure" as used herein may be understood so that it has a physical extension. For example, it may be recognizable as a structure by a person skilled in the art, and / or it may be touchable by a person skilled in the art. The structure may be provided by any kind of means, for example, a mechanical element, a space, a part or material of the upper, middle and bottom layers and / or the lower, middle and bottom layers, etc.

[0026] As used herein, the term "relative movement" may be understood so that, during ordinary use of the sole for a shoe, such movement can be recognized by a person skilled in the art without research effort. Relative movement should be understood to provide intentional movement. Therefore, it may be the case that relative movement on a microscopic level is not sufficient to be called relative movement within the meaning of the present disclosure. In addition, since the upper mid-bottom layer and the lower mid-bottom layer are at least partially different from each other, relative movement is considered to be that these layers can slide relative to each other. For example, a distance may be identified, such as a distance in the medial and / or lateral direction of the midfoot. The direction of this sliding is not limited to a specific one, and all directions in space are covered in the present disclosure.

[0027] It should be noted that the term "upper" in the expression "upper mid-bottom layer" does not limit the term "mid-bottom layer" itself. In particular, this does not mean that the "upper mid-bottom layer" must be arranged on the upper side of something. The same applies to the term "lower" in the expression "lower mid-bottom layer". However, as detailed elsewhere herein, this understanding that the upper mid-bottom layer is arranged on the upper side of the lower mid-bottom layer can help explain the preferred embodiments of the first aspect of the present disclosure in more detail.

[0028] The soles for shoes described herein may be used in particular in conjunction with and / or when applied to athletic shoes, such as running shoes, particularly long-distance running shoes, etc. However, it should be noted that the soles may be used with any kind of footwear, including but not limited to: American football shoes, hiking boots, athletic shoes, basketball shoes, rugby shoes, baseball shoes, golf shoes, tennis shoes, cross-training shoes. Furthermore, the soles may be used in conjunction with shoes for any type of athletic activity.

[0029] The term "athletic activity" should be understood to include one or more and / or any combination of at least the following non-exhaustive list: aerobics, athletic training, running, hiking, climbing, group fitness classes, walking, cycling, yoga, soccer, tennis, American football, basketball, exercise, volleyball, gymnastics, weightlifting, cross-training, baseball, softball, rugby, hockey, wrestling, squash, track and field (e.g., sprinting, long jump, high jump), cross-country skiing, golf, lacrosse, triathlon.

[0030] Furthermore, shear structures that provide the benefits described herein may additionally or alternatively be used in any type of equipment used in athletic activities. That is, shear structures need not be limited to the example of being used in the sole of a shoe. It is feasible to transfer the concept of shear structures to any type of activity or athletic activity where stability, comfort, force attenuation, or generally any support and / or improved wearer feel is desired.

[0031] However, it has been found that the advantages of the shear structures described herein are particularly pronounced when applied to the sole of a shoe, such as a shoe used during athletic activities.

[0032] The term "wearer" referred to herein may be any type of person capable of wearing an article of footwear. The term "wearer" may be used synonymously with the terms "user," "athlete," "human," "individual," "person," etc.

[0033] Direction and position of movement of the structure

[0034] In a preferred embodiment of a sole for a shoe as described herein, the relative movement between the upper midlayer layer and the lower midlayer layer is in a plane defined by the medial side to lateral side axis of the sole and the heel to toe axis of the sole, wherein the relative movement between the upper midlayer layer and the lower midlayer layer is preferably substantially parallel to the heel to toe axis of the sole.

[0035] This may have the advantage that horizontal forces may be attenuated by the shear structure. This may be beneficial because the forces provided by the shear structure are then not directed towards the central part of the wearer's body. This may therefore have the advantage that impact on joints and / or muscles may be reduced.

[0036] Note that horizontal forces may occur during the first contact of the sole with the ground and due to the relative motion of the upper and lower midsole layers.

[0037] When the relative motion between the upper mid-layer and the lower mid-layer is substantially parallel to the heel-to-toe axis of the sole, this can have the further advantage that the motion parallel to the medial-to-lateral axis of the sole is reduced and / or substantially zero. This helps provide stability to the wearer's foot. It is particularly advantageous that the shearing motion can provide friction that causes heat to be generated, which helps reduce kinetic energy. This can be particularly important, for example, during downhill running. However, this is also important in any other type of sports activity.

[0038] In a preferred embodiment of a sole for a shoe as described herein, the shear structure is configured to allow relative movement between the upper midsole layer and the lower midsole layer - in at least one of the forefoot portion of the midsole, the midfoot portion of the midsole, the rearfoot portion of the midsole, the lateral foot portion of the midsole, and the medial foot portion of the midsole, preferably in at least one of the forefoot portion of the midsole and the midfoot portion of the midsole, such as at least one of the lateral forefoot portion of the midsole, the medial forefoot portion of the midsole, the lateral midfoot portion of the midsole, and the medial midfoot portion of the midsole, most preferably in at least one of the lateral forefoot portion of the midsole and the lateral midfoot portion of the midsole.

[0039] This can have the advantage that the attenuation of the forces in the portion specified in this embodiment can be particularly significant. It has been found that while the prior art focuses on the rear foot portion of the midsole to claim improved cushioning, the rest of the midsole is often ignored or not given much attention. According to the present disclosure, this disadvantage can be successfully offset. The advantages of the sole of the present disclosure are particularly evident in downhill running, because the gait cycle during such downhill running may be different from flat and / or uphill running. For example, during downhill running, the forefoot may usually contact the ground first. Therefore, providing a shear structure in the forefoot portion and / or the midfoot portion can be particularly advantageous.

[0040] It has been found that arranging the shear structure so that the relative movement between the upper midsole and the lower midsole is configured in the forefoot portion of the outside of the foot generally contributes to further flexibility of the sole of the shoe. For example, some remaining parts of the midsole can generally be equipped with additional functional elements and / or characteristics. Other functional elements can be, for example, the sole plate described elsewhere in this article. Therefore, all of these functions can work together to provide a combined advantageous effect. In addition, the manufacture of the shear structure in the forefoot portion of the outside of the foot can be performed in a simplified manner.

[0041] However, as described in this embodiment, the shear structure is not limited to being in the lateral forefoot portion. Instead, the shear structure can be arranged in any other portion of the midsole. In one example, multiple shear structures can be arranged in the midsole to provide a combined beneficial effect that helps to further attenuate the forces on the wearer's body.

[0042] In one example, it is possible that when the shear structure is configured to allow relative movement between the upper mid-bottom layer and the lower mid-bottom layer in any of the sections specified herein, the shear structure itself is also arranged in the corresponding section.

[0043] In a preferred example, the relative movement means that the upper mid-bottom layer moves further from the heel of the midsole in the direction of the toe of the midsole than the lower mid-bottom layer, which direction is substantially parallel to the heel-to-toe axis. In another example, the relative movement means that the lower mid-bottom layer moves further from the heel of the midsole in the direction of the toe of the midsole than the upper mid-bottom layer, which direction is substantially parallel to the heel-to-toe axis.

[0044] Structural forming and meshing

[0045] In a preferred embodiment of a sole for a shoe as described herein, the shear structure comprises an upper shear structure on an upper mid-layer layer and a lower shear structure on a lower mid-layer layer, wherein the upper shear structure and the lower shear structure face each other, wherein the upper shear structure and the lower shear structure are preferably arranged in the forefoot portion of the midsole and / or the midfoot portion of the midsole, most preferably in the lateral forefoot portion of the midsole and / or the lateral midfoot portion of the midsole.

[0046] This can have the advantage that the functionality of the shear structure can be at least partially divided into at least two structures, i.e., an upper shear structure and a lower shear structure. However, as described elsewhere herein, the upper middle bottom layer and the lower middle bottom layer can only partially differ from each other. Therefore, they can be attached to each other and / or at least partially formed integrally. Therefore, the two shear structures can increase flexibility. For example, the upper middle bottom layer and the lower middle bottom layer can each be provided with a specially designed structure during manufacturing, which structure can allow the upper middle bottom layer and the lower middle bottom layer to exhibit the advantages described herein when assembled.

[0047] As will be understood by those skilled in the art, the same as described elsewhere herein with respect to the term "structure" applies to the terms "upper shear structure" and "lower shear structure". That is, these terms may mean that the corresponding structures may have a physical extension. Furthermore, they may be recognizable as structures by those skilled in the art, and / or they may be touchable by those skilled in the art.

[0048] Although possible, the upper and lower shear structures facing each other do not mean that the upper and lower shear structures are in contact with each other. Instead, it only means that they are pointing towards each other. This can further contribute to the advantages described elsewhere in this article regarding the attenuation effect.

[0049] The term "upper" in the expression "upper shear structure" does not limit the term upper shear structure itself. In particular, it does not mean that the "upper shear structure" is arranged on the upper surface or the lower surface of the upper midsole, etc. On the contrary, the term "upper" in this context is only used to indicate that the "upper shear structure" is included by the upper midsole layer.

[0050] In a preferred embodiment of a sole for a shoe as described herein, the upper shear structure and the lower shear structure at least partially engage one another.

[0051] “Engage” may be understood as being accommodated and / or received.

[0052] This has the advantage that the upper and lower shear structures can be easily assembled and a secure construction can be provided which may not necessarily require any separate attachment means such as fasteners, adhesives etc., although possible. Thus, the arrangement may be considered to be at least partially self-supporting.

[0053] Due to this engagement, the upper shear structure and the lower shear structure may be allowed to interact with each other and / or at least partially contact each other. Therefore, movement (such as shearing) may increase the friction between the upper shear structure and the lower shear structure, thereby leading to the generation of heat and, in turn, a reduction in kinetic energy. It should be noted that most prior art cushioning elements are limited to the principle of partially deforming the sole. This limitation is overcome by shear structures, in particular by the upper shear structure and the lower shear structure proposed herein. In turn, the reduction in kinetic energy may achieve damping, which may reduce the load on the wearer's joints and thereby reduce muscle damage and fatigue.

[0054] In a preferred embodiment of the sole for a shoe as described herein, the upper shear structure and the lower shear structure are shaped substantially corresponding to each other.

[0055] This helps the shearing movement between the upper shearing structure and the lower shearing structure. In addition, the engagement of the upper shearing structure and the lower shearing structure at least partially with each other can be simplified thereby.

[0056] "Formed substantially correspondingly to one another" may mean that the upper shear structure may have a protrusion or the like that may engage into a recess of the lower shear structure, and / or vice versa. However, shaped substantially correspondingly to one another may alternatively or additionally mean that the upper and lower shear structures may have substantially the same surface area, the same shape to fit into one another, or similar surface structures that allow engagement into one another.

[0057] In a preferred embodiment of a sole for a shoe as described herein, the upper shear structure and the lower shear structure engage with each other via a form-fitting connection.

[0058] A "form-fit connection" may be understood as such that the upper shear structure and the lower shear structure may be shaped or designed to fit each other. This may result in an improved engagement without the need for additional fasteners or adhesives. The engagement may depend on the geometry of the upper shear structure and the lower shear structure. However, it should be noted that the form-fit connection refers only to the shape of the upper shear structure and the lower shear structure. In particular, the form-fit connection may not be confused with a rigid connection. On the contrary, the shearing movement of the upper middle bottom layer and the lower middle bottom layer is also fully covered by it, as described in more detail elsewhere herein.

[0059] Due to this form-fitting connection, the upper shear structure and the lower shear structure can be easily assembled, which can significantly reduce labor and manufacturing costs.

[0060] In one example, the form-fit connection can be understood as a one-to-one correspondence. It should be noted that the form-fit connection may not exclude any deformation of the upper middle bottom layer and / or the lower middle bottom layer. As mentioned elsewhere in this article, such deformation can be particularly understood. In addition, the form-fit connection may also not exclude any shearing movement of the upper middle bottom layer and / or the lower middle bottom layer. As mentioned elsewhere in this article, such shearing movement is particularly advantageous.

[0061] It should be noted that merely by means of an engagement or form-fitting arrangement, the use of additional means for attaching the upper and lower shear structures, such as fasteners, adhesives, etc., is not necessarily excluded. In one example, additional means for attaching the upper and lower shear structures, such as fasteners, adhesives, etc., are provided.

[0062] In a preferred embodiment of a sole for a shoe as 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.

[0063] This can be understood in such a way that the upper shear structure and the upper middle bottom layer are formed as an integral piece, and the lower shear structure and the lower middle bottom layer are formed as an integral piece. Therefore, the upper shear structure and the upper middle bottom layer may not be separate pieces, but may form an upper middle bottom layer, and the lower shear structure and the lower middle bottom layer may not be separate pieces, but may form a lower middle bottom layer.

[0064] This can reduce manufacturing effort and costs, which is appreciated when manufacturing soles for mass production.

[0065] Details of structure / protrusions

[0066] In preferred embodiments of a sole for a shoe as described herein, the upper shear structure comprises one or more upper protrusions and the lower shear structure comprises one or more lower recesses, and / or, wherein the lower shear structure comprises one or more lower protrusions and the upper shear structure comprises one or more upper recesses.

[0067] This may have the advantage that the upper shear structure and the lower shear structure may interact with each other. For example, one or more upper projections of the upper shear structure may interact with one or more lower recesses of the lower shear structure. Likewise, one or more lower projections of the lower shear structure may interact with one or more upper recesses of the upper shear structure. This may help to allow relative movement between the upper mid-bottom layer and the lower mid-bottom layer, while the movement is controlled to a certain extent.

[0068] One or more projections described herein (for simplicity only, projections are sometimes described herein without the prefix "upper" and / or "lower", and the skilled person understands that the description may refer to both projections) may be understood as something extending from a surface or object. The term "projection" may be used to describe any portion of an object or structure that protrudes, extends, or extends beyond a surrounding surface or boundary. In one example, a projection may be a three-dimensional extension or protuberance extending outward from a surface or object. The projection may be provided in various sizes. The size, shape, etc. of the projection may vary according to the intended purpose and / or desired result. Substantially all technically significant sizes and shapes may be encompassed in the present disclosure.

[0069] Protrusions as described herein can provide structural benefits and / or can provide more specific functions, particularly in the case of cushioning. In addition, protrusions can contribute to visual appearance, which can give the wearer an indication of where in the sole a specific function is provided.

[0070] The one or more recesses referred to herein (for simplicity only, recesses are sometimes described herein without the prefix "upper" or "lower", and the skilled person understands that the description may refer to both recesses) may be a hollow or indented area or space set back or carved into a surface, structure, object, etc. The recess may be substantially opposite to the protrusion. The recess may provide various functions as described in more detail elsewhere herein.

[0071] The term "upper" in the expression "upper protrusion" does not limit the term protrusion itself. In particular, it does not mean that the "upper protrusion" is arranged on the upper surface or the lower surface, etc. On the contrary, the term "upper" in the context of this article is only used to indicate that the "upper protrusion" is included by the upper shear structure.

[0072] Likewise, the term "lower" in the expression "lower recess" does not limit the term recess itself. In particular, this does not mean that the "lower recess" is arranged on the lower surface or the upper surface, etc. On the contrary, the term "lower" in the present context is only used to indicate that the "lower recess" is included by the lower shear structure.

[0073] The term "lower" in the expression "lower protrusion" does not limit the term protrusion itself. On the contrary, the term "lower" in the context of this article is only used to indicate that the "lower protrusion" is included by the lower shear structure.

[0074] Likewise, the term "upper" in the expression "upper recess" does not limit the term recess itself. In particular, this does not mean that the "upper recess" is arranged on the upper surface or the lower surface, etc. On the contrary, the term "upper" in the context of this article is only used to indicate that the "upper recess" is included by the upper shear structure.

[0075] In preferred embodiments of a sole for a shoe as described herein, one or more upper protrusions are at least partially accommodated in one or more lower recesses, and / or wherein one or more lower protrusions are at least partially accommodated in one or more upper recesses.

[0076] This may have the advantage that the projections and recesses facilitate controlled movement. This may help reduce the loads that occur during ground contact of the sole. This may be the case up to a certain point. As described elsewhere herein, defined stops may be provided by projections and recesses along the heel-to-toe axis of the sole. In this defined stop state, shearing movement may be prevented. Thus, due to the presence of defined stops, the impact on the wearer's joints and / or muscles may be reduced overall, and safety may be increased at the same time. Therefore, wearing shoes comprising these soles becomes more comfortable and safer, which is particularly noticeable during sports activities, such as running.

[0077] The term "accommodated" may mean that the respective protrusions and recesses are such that they fit or match the shape and / or space of the respective other.

[0078] In a preferred embodiment of a sole for a shoe as described herein, the one or more upper protrusions and / or the one or more lower protrusions are spaced from each other as seen in a horizontal plane of the sole, preferably as seen along a heel-to-toe axis of the sole.

[0079] This may have the advantage that the relative movement of the upper mid-bottom layer and the lower mid-bottom layer may be enhanced. For example, the space between the projections so provided may be empty or filled, which allows for greater flexibility in controlling the relative movement. Thus, according to this embodiment, the reduction in kinetic energy may be controlled to a greater extent. Thus, a reduction in joint loads and an improvement in cushioning for the wearer may be achieved.

[0080] It should be understood that when it is mentioned that "one or more upper protrusions and / or one or more lower protrusions are spaced apart from each other", this means that one or more upper protrusions are spaced apart from each other, and / or this means that one or more lower protrusions are spaced apart from each other. This may not mean that one or more upper protrusions are spaced apart from one or more lower protrusions. However, it should be noted that in some cases, the latter may still be covered by the present disclosure.

[0081] Being spaced apart means that there can be a distance between two corresponding elements. In one example, the distance can be identified by a person skilled in the art without the need for any specific equipment.

[0082] As referred to herein, a horizontal plane may be substantially perpendicular to a vertical axis. A horizontal plane may be a plane defined by a heel-to-toe axis and a medial-to-lateral axis of the sole.

[0083] In a preferred embodiment of a sole for a shoe as described herein, one or more upper protrusions and / or one or more lower protrusions are spaced apart from each other 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, as seen in a horizontal plane of the sole, preferably as seen along the heel-to-toe axis of the sole, and / or are spaced apart by at most 8 cm, preferably at most 6 cm, more preferably at most 5 cm, even more preferably at most 4 cm, further more preferably at most 3.5 cm, most preferably at most 3 cm.

[0084] With the spacing of the one or more upper protrusions and / or the one or more lower protrusions as provided in the present embodiment, an optimal balance may be achieved between two different and / or conflicting requirements.

[0085] On the one hand, sufficient relative movement between the upper mid-bottom layer and the lower mid-bottom layer should be provided, which can lead to a reduction in kinetic energy, and thus to a reduction in joint loads and improved cushioning for the wearer. For this reason, a larger spacing may be beneficial. On the other hand, it should be ensured that the sole still provides sufficient stability so that the wearer can carry out his or her activities in a substantially safe manner. For this reason, a smaller spacing would be beneficial.

[0086] Thus, without wishing to be bound by theory, it is believed that an optimal balance between these conflicting requirements can be achieved according to the values ​​as specified herein.

[0087] In a preferred embodiment of a sole for a shoe as described herein, the one or more upper protrusions and the one or more upper recesses are arranged in an alternating manner, preferably as seen along a heel-to-toe axis of the sole.

[0088] This may have the advantage of being able to create a simplified pattern. Furthermore, the assembly of the upper and lower midsole layers may be improved. Arranging the protrusions and recesses in an alternating manner along the heel-to-toe axis is particularly advantageous for attenuating forces along the medial-to-lateral axis of the sole.

[0089] It will be appreciated that the alternating pattern is such that an upper protrusion is followed by an upper recess, followed by an upper protrusion, and so on.

[0090] In preferred embodiments of a sole for a shoe as described herein, one or more upper protrusions and / or one or more lower protrusions have an elongated shape, preferably with a longitudinal axis substantially parallel to the medial to lateral axis of the sole.

[0091] The elongated shape may have the advantage that the firmness and / or stability of the shearing structure may be influenced and / or adjusted according to individual needs. In addition, it allows flexibility to impart further functionality to the shearing structure.

[0092] The term "elongated" means that the protrusion may have a dimension along one axis that is greater than one dimension along the remaining axis, preferably greater than both dimensions along the remaining axis, the remaining axes being substantially perpendicular to the one axis. It should be understood that when describing dimensions herein, manufacturing tolerances must generally be taken into account. Therefore, the dimensions described herein may vary slightly.

[0093] In a preferred embodiment of a sole for a shoe as described herein, one or more upper protrusions and / or one or more lower protrusions have a shape as seen in a horizontal plane of the sole, which shape includes one or more of the following: a line segment defined by a mathematical function, in particular a periodic mathematical function such as a sine wave, a zigzag line segment, a sawtooth line segment.

[0094] This can have the advantage that the relative movement of the upper mid-bottom layer and the lower mid-bottom layer can be enhanced and / or controlled to a greater extent. In addition, the projections with an angled shape allow some interlocking of one or more upper projections with corresponding one or more lower recesses and / or some interlocking of one or more lower projections with corresponding one or more upper recesses. The interlocking can be improved as follows, the upper mid-bottom layer and the lower mid-bottom layer do not move relative to each other along the medial to lateral axis of the sole. This can enhance the provision of sufficient stability for the wearer during running. At the same time, sufficient shearing motion along the heel to toe axis is allowed, which reduces the mechanical load on the wearer. The angled shape of the projection can also allow the generation of a softer stop, for example, a softer limiting stop. This may be better than a fairly violent and / or immediate stop.

[0095] As will be understood by a person skilled in the art, a shape seen in a horizontal plane of the sole may in the present context mean that even if a protrusion does not lie in said plane, it will be represented by a projection onto a two-dimensional horizontal plane.

[0096] It will be appreciated that the shear forces generated may affect the overall performance of the sole. Excessive shearing may lead to instability and reduced control during running, affecting the gait cycle and potentially causing discomfort or injury. Thus, this embodiment has the advantage that the degree of relative motion is controlled to some extent. For example, the relative motion may be at least partially restricted.

[0097] Note that the shape may include one or more of the specified line segments herein. This means that any combination of the specified line segments may be arranged continuously, for example, to provide a shape in an arbitrary manner.

[0098] This is particularly preferred when the shape may include a zigzag line or a sawtooth line. In this way, improved motion control of the upper and lower mid-layers along the heel-to-toe axis may be provided. This may improve the guidance of the upper and lower mid-layers. This may result in a softer stop, for example a softer defined stop compared to a rather violent and / or immediate stop. Such a softer stop has been found to be beneficial in attenuating the impact on the wearer's body.

[0099] In a preferred embodiment of a sole for a shoe as described herein, one or more upper protrusions and / or one or more lower protrusions comprise one or more side surfaces, the normal of the side surfaces being substantially parallel to a horizontal plane of the sole, the side surfaces being angled relative to the medial to lateral foot 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°, further more preferably at least 25°, further 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°, further more preferably at most 45°, further more preferably at most 40°.

[0100] On the one hand, an increase in the angle can create a greater resistance of the respective protrusions that are substantially interlocked into each other. For example, an angle of 90° means that the side surface is substantially perpendicular to the medial to lateral axis of the sole, i.e., substantially parallel to the heel to toe axis of the sole. Therefore, if the angle is too large, the desired relative movement may be restricted too much. Therefore, a smaller angle value would be beneficial.

[0101] On the other hand, it should be ensured that the angle is not too small, because otherwise the resistance of the respective protrusions substantially interlocking into each other may be too small. This may lead to an unsafe feeling during running, because the relative movement may not be limited to a sufficient amount. Therefore, a larger angle value would be beneficial.

[0102] Against this background, without wishing to be bound by theory, it is believed that an optimal balance between these conflicting requirements can be achieved according to the values ​​specified herein.

[0103] In a preferred embodiment of the sole as described herein, one or more upper protrusions and / or one or more lower protrusions 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.

[0104] On the one hand, one or more upper protrusions and / or one or more lower protrusions should have sufficient height so that they can properly engage into the corresponding one or more recesses. As understood, this can help to provide deformation of the upper protrusions and / or lower protrusions because the material is slightly weakened, thereby helping the material to deform. Therefore, this can help to reduce kinetic energy and thereby help to reduce joint loads and improve cushioning for the wearer. For this reason, a larger height may be beneficial. On the other hand, the height of one or more upper protrusions and / or one or more lower protrusions should not be too large because the total thickness of the midsole may be unnecessarily increased. In addition, the weight of the sole will increase due to the protrusions having a considerable height. For this reason, a smaller height will be beneficial.

[0105] Thus, without wishing to be bound by theory, it is believed that an optimal balance between these conflicting requirements can be achieved according to the values ​​as specified herein.

[0106] The maximum height may be understood as an average height based on eight of substantially all protrusions provided. However, in one example, the maximum height may mean that it is the maximum height of one protrusion.

[0107] It should be noted that in the plane defined by the medial-to-lateral axis of the sole and the heel-to-toe axis of the sole, a distance may be provided between the upper protrusions and the corresponding lower recesses and / or between the lower protrusions and the corresponding upper recesses. This distance may help provide friction when the corresponding protrusions move to bridge the distance. This may help convert kinetic energy into heat to reduce impact on the wearer's joints.

[0108] Sole plate

[0109] In a preferred embodiment of the sole for a shoe as described herein, the sole further comprises a sole plate disposed between the upper midlayer layer and the lower midlayer layer, the sole plate being configured to control relative movement between the upper midlayer layer and the lower midlayer layer.

[0110] This may have the advantage that the upper mid-bottom layer and the lower mid-bottom layer are provided with further functionality, including but not limited to increased rigidity. In addition, the sole plate may allow for fine-tuning of the relative movement of the upper mid-bottom layer and the lower mid-bottom layer. The term "controlling" relative movement may mean hindering and / or facilitating relative movement. As will be appreciated, such control may depend on the desired outcome and / or the use case of the sole for the shoe.

[0111] The term sole plate may refer to a flat plate or surface used for a specific purpose. The sole plate may provide stability and support for the wearer's foot.

[0112] In a preferred embodiment of a sole for a shoe as described herein, the sole plate comprises protuberances and / or indentations which engage with corresponding indentations and / or protuberances provided in the lower midsole layer and / or the upper midsole layer.

[0113] This further contributes to the advantages mentioned in the previous embodiments. In particular, due to the protuberances and / or indentations, the control of the relative movement may be improved.

[0114] In a preferred embodiment of a sole for a shoe as described herein, the projections of the sole plate are at least partially hollow and / or at least partially filled with foam.

[0115] This can have the advantage that the protuberances can be equipped with a different functionality than the rest of the sole plate. Thus, the overall functionality of the sole plate can be tailored to a more specific use case. The hollow and / or at least partially filled protuberances have the additional function of a more rigid arrangement. This can contribute to the stability of the sole. This can be important for at least partially compensating for relative movements due to the shear structure. Thus, stability and cushioning can be provided simultaneously.

[0116] In a preferred embodiment of a sole for a shoe as described herein, the sole plate is elongated and arranged along a heel-to-toe axis, wherein the indentations and / or protrusions provided in the lower midlayer and / or upper midlayer are also elongated and arranged along the heel-to-toe axis of the sole.

[0117] This can have the advantage that the relative movement of the upper mid-bottom layer and the lower mid-bottom layer can be controlled to a greater extent. For example, the elongated shape of the indentations and / or protuberances facilitates that forces substantially parallel to the medial to lateral axis of the foot can be absorbed to a greater extent. This does not mean that the relative movement of the upper mid-bottom layer and the lower mid-bottom layer is prevented. That is, because according to the sole for a shoe proposed here, such relative movement substantially parallel to the heel to toe axis of the sole is desired.

[0118] The term "elongated" referred to in this embodiment may be understood to be similar to that described elsewhere herein.

[0119] In preferred embodiments of a sole for a shoe as described herein, the indentations and / or protuberances of the sole plate have a generally semicircular profile or a circular segmented profile - preferably when viewed along the heel-to-toe axis.

[0120] This may have the advantage that the control of the relative movement of the upper and lower mid-bottom layers may be increased. The profile described herein allows a good compromise between relatively high movement restrictions along the lateral side of the foot and the medial side of the foot, while the rounded shape facilitates sliding along the heel-to-toe axis of the sole. Thus, the profile as described in this embodiment creates more flexibility and contributes to an improved sole for a shoe.

[0121] In one example, as seen in the heel-to-toe axis, the profile has a substantially similar shape along its overall length. In another example, the shape of the profile can vary along the heel-to-toe axis along its entire length.

[0122] As will be appreciated, the semicircular profile or circular segment profile may not be a perfect semicircular profile or circular segment profile. Instead, manufacturing tolerances may result in slight deviations from such a perfect profile.

[0123] In a preferred embodiment of a sole for a shoe as described herein, the sole plate comprises a stop element arranged obliquely with respect to the protuberances and / or indentations of the sole plate, the stop element being preferably arranged in a toe portion of a forefoot portion of the midsole.

[0124] This may have the advantage that the sole plate may be tailored to fit into the midsole in a more precise manner. Furthermore, during use of a shoe comprising such a sole, the position of the sole plate may be substantially maintained. The oblique arrangement of the stop element relative to the protuberances and / or indentations of the sole plate allows support in two substantially perpendicular directions. This may ensure, for example, that the sole plate does not substantially move relative to another part of the midsole, although such relative movement may not be excluded according to the sole for a shoe as proposed herein.

[0125] 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 identified as such an element. In this example, the physical extension of the stop element can provide some engagement with another part of the midsole, such as some engagement with the upper midsole layer and / or the lower midsole layer. The engagement can include a form-fitting 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 component having a physical extension.

[0126] In a preferred embodiment of a sole as described herein, the sole plate extends along the entire length of the shear structure when viewed from the heel to toe axis of the sole.

[0127] This can have the advantage that the effect of the sole plate in reinforcing the sole for the shoe can be enhanced. In particular, since the shear structure provides relative movement of the upper mid-bottom layer and the lower mid-bottom layer, as described elsewhere herein, this part of the midsole can be perceived as being "softer" for the wearer than other parts of the midsole. Therefore, when the sole plate extends along the entire length of the shear structure, the softness can be partially compensated and a good compromise can be found. In particular, the shear structure can still provide friction so that the sole for the shoe can reduce kinetic energy and thereby reduce the joint load on the wearer's body. However, due to the extension of the sole plate as described in this embodiment, the sole can still provide sufficient stability for the wearer and / or provide sufficient energy return in some cases.

[0128] In one example, the sole plate may extend to 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 to toe axis of the sole.

[0129] For example, the sole plate may begin in a midfoot portion of the sole and may extend to a toe portion of the sole.

[0130] Hollow / filled structures

[0131] In a preferred embodiment of the sole for a shoe as described herein, the shear structure comprises a hollow space, preferably free of an upper midsole layer and / or a lower midsole layer.

[0132] The hollow space may have the advantage of allowing greater relative movement between the upper mid-bottom layer and the lower mid-bottom layer. 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 achieve improved internal and / or solid friction, which may reduce the kinetic energy when, for example, the sole impacts the ground. This enhances the cushioning effect. For example, the shear structure may be designed so that at least a portion thereof may be deformed, thereby at least partially avoiding entry into the hollow space. As a result, the surfaces of the shear structure may contact each other, thereby providing solid friction. In addition, due to deformation into the hollow space, internal friction may provide the additional benefit of reducing kinetic energy and increasing the cushioning effect.

[0133] The term "hollow space" as used in the present disclosure may be referred to as a three-dimensional volume. In one example, the hollow space may be empty, for example, no parts, components, elements, etc. may be arranged in the hollow space. Empty may include that a gas, such as air, may be arranged in the hollow space. Alternatively or additionally, the hollow space may be at least partially filled with one or more parts, components, elements, etc. (e.g., filled with a portion of the midsole). In one example, the hollow space as referred to herein is understood to be a macroscopic space, that is, a space that a technician can easily identify as such a space without the need for detailed study.

[0134] In one example, the hollow space can be a cavity or the like. In one example, the hollow space can include a plurality of interconnected sub-hollow spaces that form the hollow space when combined. 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-cavities can form the hollow space when combined. In one example, the hollow space can be at least partially in communication with the environment.

[0135] In a preferred embodiment of the sole as described herein, the shear structure comprises a solid material, such as a foam material.

[0136] Solid materials can have the advantage of providing friction of the corresponding surface, or internal friction, i.e. friction within the material itself. This can result in a reduction in kinetic energy, which increases the cushioning effect. This can result in a reduction in the load on the wearer's joints, which makes wearing the shoe more comfortable, for example during running.

[0137] As described elsewhere in this disclosure, the shear structure may include a hollow space. However, this does not exclude that the shear structure includes a solid material. In one example, both exist, that is, the shear structure includes a hollow space and a solid material.

[0138] Visibility

[0139] In a preferred embodiment of a sole for a shoe as 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 from the medial side of the midsole, more preferably from the lateral forefoot portion of the midsole and / or from the medial forefoot portion of the midsole.

[0140] This may have the advantage that the appearance of the shear structure may be adjusted to indicate to the wearer that the visible portion of the sole, i.e. the shear structure, has a certain function. Thus, without wishing to be bound by theory, it is believed that the wearer may adjust his or her performance and / or behavior due to visibility. For example, the wearer may attempt to act (e.g. run) so that the shear structure is not particularly exposed to external impacts that may cause damage to it. Furthermore, such visibility may influence the performance, confidence and / or motivation of the wearer to participate in athletic activities in the first instance.

[0141] Furthermore, a shear structure that is at least partially visible from the outside may have the advantage that the state of the shear structure, such as its solidity, firmness, integrity, load state, damage, etc., may be assessed by a person.

[0142] An at least partially visible shear structure may be understood as one that, during ordinary use of the sole for a shoe, can be identified by a person without significant examination of the sole. However, it may be the case that, in the fully assembled state of the sole in the shoe, the shear structure may not be visible, or only a portion thereof may be visible, as described elsewhere herein.

[0143] In a preferred embodiment of a sole for a shoe as described herein, the shear structure has a sawtooth shape as viewed from the outside, preferably from the lateral side of the midsole and / or from the medial side of the midsole, more preferably from the lateral forefoot portion of the midsole and / or from the medial forefoot portion of the midsole.

[0144] At least the same advantages mentioned in the previous embodiments regarding visibility of the shear structure also apply to the sawtooth shape as seen from the outside of this embodiment.

[0145] It should be noted that in some examples, when the shoe including the sole is assembled, the shear structure may not be fully visible from the outside. In one example, from the outside, other materials and / or elements may at least partially cover the shear structure. Therefore, in some cases, the term "from the outside" may mean from the outside of the sole when the shoe may not be fully assembled and / or manufactured. However, it is possible that the shear structure is almost fully visible from the outside even when the shoe is fully assembled and / or manufactured. As understood, the shear structure may have an extension in the midsole that will be covered by material and therefore not visible from the outside.

[0146] Material

[0147] In preferred embodiments of a sole for a shoe as described herein, the upper midsole layer comprises one material and the lower midsole layer comprises a second material, wherein the first material is different from the second material or wherein the first material is substantially the same as the second material.

[0148] This has the advantage that the upper mid-bottom layer and the lower mid-bottom layer can be equipped with different functions specifically tailored for the desired result. This can help to enhance the cushioning of the wearer's foot. For example, the upper mid-bottom layer can be provided with a material that is particularly suitable for providing more cushioning to the wearer's foot because it can be in closer contact with the wearer's foot. Alternatively or additionally, the reverse is also possible and is not excluded by the present disclosure. For example, the lower mid-bottom layer can be provided with a material that is particularly suitable for providing more cushioning to the wearer's foot.

[0149] The first material being different from the second material may have a particular advantage, namely providing different degrees of friction. This may include different degrees of internal friction and / or different degrees of solid friction (static friction, rolling friction and / or dynamic friction). For example, different materials exhibiting different coefficients of friction may be provided. Alternatively or additionally, the surface roughness of the upper mid-bottom layer and / or the lower mid-bottom layer may be different. In general, this allows fine-tuning of relative motion to reduce the forces acting on the wearer's foot. This may result in a reduction in kinetic energy, for example when the sole collides with the ground. This may result in a reduction in joint loads and a reduction in impact on muscles, as described elsewhere herein.

[0150] As an example, the first material can be lighter or heavier than the second material. As an example, the first material can have substantially the same weight as the second material.

[0151] The first material being substantially the same as the second material may have the advantage of improving the manufacturing process thereof. In addition, this may have the advantage of providing substantially the same material properties in the lower midsole layer and the upper midsole layer. In some cases, it may be desirable to have substantially consistent performance and / or substantially consistent properties throughout the midsole. As will be appreciated, impurities of the first material and the second material may not be excluded by this. That is, slight deviations in the composition of the first material and the second material may exist, although they may still be considered substantially the same - as will be appreciated by those skilled in the art.

[0152] In a preferred embodiment of the sole as 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 expanded thermoplastic polyurethane particles (eTPU), expanded polyamide particles (ePA), expanded polyether block amide particles (ePEBA) and / or expanded thermoplastic polyester ether elastomer particles (eTPEE).

[0153] This has the advantage that the material is relatively easy to obtain, cost-effective and widely accepted in the field of soles. Particle foam is particularly useful for providing cushioning and energy return effects because this material can have good elasticity and cushioning characteristics. In addition, softer or harder materials can be used depending on the degree of cushioning, support, stability and / or solidity required. This allows fine-tuning - under pressure loads on the sole from the ground, for example - the responsiveness of the midsole, in particular the responsiveness of the upper and lower midsole layers. The choice of material for the midsole - in particular the upper and lower midsole layers - may be subject to the material of the upper and / or outer sole of the shoe. This may have advantages for the attachment of the various parts.

[0154] 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 provide excellent elasticity and cushioning properties. Thus, external impacts, such as those generated when a shoe sole hits the ground, can be cushioned, thereby achieving pleasant wearing comfort.

[0155] Polyamide foam may also be referred to as nylon foam. It is a foam material made 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 adjusted so that it has relatively low water absorption. This makes it suitable for applications where moisture resistance may be important. This can be advantageous for various sports.

[0156] Other examples of particle foams may include expanded polypropylene (ePP). The use of particle foams may greatly facilitate the manufacture of shoe soles comprising such particles. This may be because no special arrangement of the particles, for example within a mould, is required, and the particles may be blown or swept into the mould by a stream of air, steam, liquid, liquid-like powder material or the like. The particles may easily undergo further processing steps, such as pressure and / or steam treatment, or fusion by melting the surface of the particles, where they are bonded together without the need for further adhesives or the like.

[0157] In a preferred embodiment of a sole for a shoe as described herein, the midsole, in particular the upper midsole layer and / or the lower midsole layer, comprises or consists of a homogeneous foam material.

[0158] Such homogeneous foams may be referred to as polymer foams, plastic foams. Such homogeneous foams may be produced, for example, by injection molding or compression molding. Homogeneous foams typically do not have a recognizable granular structure, ie they do not substantially have any recognizable particles within the final foam.

[0159] Fixedly attached / outsole

[0160] In a preferred embodiment of a sole for a shoe as described herein, a portion of the upper midsole layer and a portion of the lower midsole layer are fixedly attached to each other.

[0161] This can have the advantage of being able to increase the stability of the sole. When a part of the upper mid-bottom layer and a part of the lower mid-bottom layer are fixedly attached to each other, this has the advantage that the sole can absorb greater friction. Especially, when the friction caused by relative motion increases, it may be useful to provide some attachments of a part of the upper mid-bottom layer and a part of the lower mid-bottom layer. This can ensure that these layers can be kept together at least to a certain extent. In one example, the maximum allowed friction generated due to relative motion may exist, and exceeding this maximum allowed friction, the stability of the sole may be weakened. It is believed that by the attachment described herein, the maximum allowed friction can be increased at least in part.

[0162] It should be noted that attachment is advantageous because otherwise the upper mid-bottom layer and the lower mid-bottom layer may separate due to relative movement through the shear structure. That is, the upper mid-bottom layer and the lower mid-bottom layer should be fixedly attached to each other at least to the extent that the stability of the midsole can be ensured.

[0163] In a preferred embodiment of the sole for a shoe as described herein, the sole further comprises an outsole arranged under the midsole, preferably under the lower midsole layer.

[0164] The outsole may be the bottom portion of the sole that is at least partially in direct contact with the ground. This means that not the entire outsole must be in contact with the ground, although this may often be the case and is not excluded. The outsole may provide several advantages that contribute to the overall performance, comfort, grip, durability, stability and support, water resistance and weather resistance of the sole.

[0165] shoe

[0166] In another aspect of the present disclosure, these objects are solved by a shoe, in particular a sports shoe, such as a running shoe, comprising: a sole according to any of the embodiments described herein; and an upper attached to the sole.

[0167] It goes without saying that the technical properties, advantages and improvements over the prior art of the shoe sole shown or described also apply to shoes, in particular sports shoes, and vice versa.

[0168] The upper can be attached to the sole by any type of suitable attachment means. As those skilled in the art will appreciate, attaching the upper of a shoe to the sole can involve various methods and techniques, depending on the type of shoe, the materials used and / or the desired durability and firmness level of the upper.

[0169] In a preferred embodiment of the shoe, the shoe is one of the following: a running shoe, a shoe used during exercise, a shoe used during athletics, etc. The above advantages of the shoe may be particularly significant when the shoe is used during downhill running, etc., for example, where the joints and muscles of the wearer's body are typically exposed to high impacts.

[0170] One-piece upper, middle and lower layers

[0171] In a second aspect of the present disclosure, the object is solved by a sole for a shoe, in particular a sole for a sports shoe, such as a running shoe, the sole comprising: a midsole, the midsole comprising an upper midsole layer and a lower midsole layer, the upper midsole layer and the lower midsole layer being formed integrally; and a shear structure arranged in the midfoot portion of the midsole and / or the forefoot portion of the midsole; wherein the shear structure is configured to allow relative movement between the upper midsole layer and the lower midsole layer.

[0172] The term "integrally formed" may be understood as forming the upper mid-bottom layer and the lower mid-bottom layer into one integral piece. This may mean that they are formed as a single piece as described elsewhere herein. This may provide several advantages in various situations as described elsewhere herein, such as, for example, improved strength and durability, simpler and easier manufacture and / or assembly, cost savings, reduction in the total weight of the resulting structure and / or product, improved performance (wear, vibration, noise, etc. associated with separate moving parts may be reduced). Further advantages are reduced material costs, reduced labor costs and / or reduced assembly time, providing simplified construction, resulting in more sustainable and environmentally friendly structures and / or products.

[0173] In a preferred embodiment of the sole for a shoe described in the second aspect, the sole for a shoe of the second aspect is the sole for a shoe of any one of the aforementioned embodiments related to the first aspect described herein.

[0174] Thus, any one or more of the embodiments, features, advantages, examples etc. as described herein with reference to the first aspect may be combined with the second aspect as described herein, and vice versa.

[0175] In particular, it goes without saying that the technical features, advantages and improvements over the prior art shown or described for the sole for a shoe of the first aspect are also applicable to the sole for a shoe of the second aspect, and vice versa.

[0176] method

[0177] In a third aspect of the present disclosure, these objectives are solved by a method for manufacturing a sole for a shoe, in particular for a sports shoe, such as a running shoe, preferably a shoe according to any of the embodiments described herein, the method comprising: providing a midsole comprising an upper midsole layer and a lower midsole layer, wherein the upper midsole layer and the lower midsole layer are at least partially different from each other; providing a shear structure arranged in the midsole; wherein the shear structure is configured to allow relative movement between the upper midsole layer and the lower midsole layer.

[0178] It should be understood that any one or more of the embodiments, features, advantages, examples, etc. described with reference to the remaining aspects of this document may 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 shown or described for the sole for a shoe of the first and second aspects are also applicable to the method of the third aspect, and vice versa.

[0179] Note that the term "substantially" as used herein may be used to include minor tolerances and / or variations. Thus, any value or arrangement described using this term may deviate slightly from the described value or arrangement. BRIEF DESCRIPTION OF THE DRAWINGS

[0180] Below, the present invention will be described in more detail with reference to the following drawings:

[0181] Figure 1 : shows an upper, mid and lower layer of a sole for a shoe, particularly a sports shoe, according to an embodiment of the present disclosure.

[0182] Figure 2 : shows a lower mid-bottom layer of a sole for a shoe, in particular a sports shoe, according to an embodiment of the present disclosure.

[0183] Figure 3 : shows an assembled state according to an embodiment of the present disclosure Figure 1 and Figure 2 Embodiment of the invention.

[0184] Figure 4 : Shows Figure 1 and Figure 2 Detailed view of the .

[0185] Figure 5 : A sole plate for a shoe, in particular a sole of a sports shoe, according to an embodiment of the present invention is shown from two different sides.

[0186] Figure 6 : Shows an upper mid-layer and a lower mid-layer for a sole of a shoe, especially a sports shoe, and a sole plate for the sole according to an embodiment of the present disclosure.

[0187] Figure 7 : A shoe according to an embodiment of the present disclosure, in particular a sports shoe, is shown, which includes a sole and a sole plate.

[0188] Figure 7a : Shown from the inside of the foot Figure 7 Embodiment of the invention. DETAILED DESCRIPTION

[0189] Only some possible embodiments of the present invention are described in detail below. However, the present invention is not limited to these, and many other embodiments may be applied without departing from the scope of the present invention. The presented embodiments may be modified in several ways and combined with each other when compatible, and certain features may be omitted as long as they appear unnecessary. In particular, the disclosed embodiments may be modified by combining certain features of one embodiment with one or more features of another embodiment.

[0190] It should be understood that not all features of the described aspects / embodiments must be present to achieve the technical advantages provided by the present disclosure, which is defined by the subject matter of the claims. The disclosed aspects / embodiments may be modified by combining certain features of one aspect / embodiment with one or more features of another aspect / embodiment. Specifically, those skilled in the art will understand that the features and / or functional elements of one aspect / embodiment may be combined with technically compatible features and / or functional elements of any other aspect / embodiment of the present disclosure, provided that the resulting combination falls within the definition of the present disclosure.

[0191] Although the following embodiments are mainly described with reference to soles for shoes, in particular for sports shoes, a person skilled in the art will appreciate that the disclosure according to the present invention may be equally applied to a number of different technical fields and / or use cases.

[0192] Throughout the drawings and description, like reference numerals represent like elements. For the sake of clarity and conciseness, certain aspects of the components or steps of certain embodiments are presented without excessive detail—when such details will be apparent to those skilled in the art from the teachings herein and / or when such details will obscure an understanding of more relevant aspects of the embodiments.

[0193] As understood by those skilled in the art and / or to avoid redundancy, reference is also made to the explanations in the previous section, which also apply to the detailed description below. In addition, for the sake of brevity and clarity, not all features, parts, elements, aspects, components and / or steps are explicitly indicated by reference numerals. This is particularly applicable to situations where those skilled in the art recognize that these features, parts, elements, aspects, components and / or steps exist in multiple forms.

[0194] definition

[0195] 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 of the sole that contacts the ground) and the upper of a shoe (e.g., the portion of the shoe that covers the top of the wearer's foot).

[0196] The term "outsole" as used in this disclosure may be the bottom portion of the sole that is at least partially in direct contact with the ground. This means that not the entire outsole must be in contact with the ground, although this may often be the case. The outsole may provide several advantages that contribute to the overall performance, comfort, grip, durability, stability and support, water resistance, and weather resistance of the sole.

[0197] As used herein, the terms "medial side," "medial side side," "medial side region," and / or "medial side portion" of a sole / midsole may refer to the inner side and / or inner edge of the sole / midsole. This side and / or edge may be closest to the center line of the wearer's body when the shoe including the sole is worn. This side and / or edge may extend from the big toe portion to the heel area. The term "medial side portion" may additionally include a small area extending from the medial side toward the midline of the sole from the heel to the toes. The "medial side" and / or "medial side portion" are typically positioned to face the arch of the foot and / or the big toe.

[0198] As used herein, the terms "lateral", "lateral side", "lateral side region" and / or "lateral side portion" of a sole / midsole may refer to the outer side and / or outer edge of the sole / midsole. This side and / or edge may be further away from the center line of the wearer's body when a shoe including the sole is worn. The side and / or edge may extend from a small toe portion to a heel region. The term "lateral side portion" may further include a small area extending from the lateral side of the foot toward the midline from the heel to the toes of the sole.

[0199] As used herein, the term "toe portion" and / or "toe area" of a sole / midsole may refer to the front portion of the sole / midsole, for example, the forefoot portion of the sole / midsole, in which the toes of the wearer's foot may be received when worn. The toes of the wearer's foot may include the big toe and / or the big toe joint. When worn, it may include the front end of the foot. In addition, when worn, the toe portion and / or toe area may include the distal phalanges, the middle phalanges, and the proximal phalanges of the wearer's foot. When worn, the toe portion and / or toe area may additionally include the front portions of the metatarsal bones of the wearer's foot.

[0200] The terms "forefoot portion" and / or "forefoot area" of a sole / midsole may refer to the front portion of the sole / midsole. The forefoot portion / forefoot area of ​​the sole / midsole may cover an area of ​​the foot corresponding to the toes and toe bases. In one example, the forefoot portion / forefoot area may cover less than approximately the front half of the underfoot portion. In one example, the forefoot portion / forefoot area may cover less than approximately one-third of the underfoot portion at the front of the underfoot portion.

[0201] The terms "midfoot portion" and / or "midfoot region" of a sole / midsole may refer to the central portion of a sole / midsole. When a shoe including the sole / midsole is worn, the midfoot portion / midfoot region of the sole / midsole shoe may cover an area of ​​the foot corresponding to the arch of the foot. In one example, the midfoot portion / midfoot region may cover less than about half of the underfoot portion, with a center point located approximately halfway along the heel-to-toe axis. In one example, the midfoot portion / midfoot region may cover less than about one-third of the underfoot portion, with a center point located approximately halfway along the heel-to-toe axis.

[0202] The terms "rearfoot portion" and / or "rearfoot area" of the sole / midsole may refer to the rear portion of the sole / midsole. When a shoe including the sole / midsole is worn, the rearfoot portion / rearfoot area of ​​the sole / midsole may cover an area corresponding to the heel and / or the area around the heel of the wearer's foot. In one example, the rearfoot portion / rearfoot area may cover less than about the rear half of the underfoot portion. In one example, the midfoot portion / midfoot area may cover less than about one-third of the underfoot portion at the rear of the underfoot portion.

[0203] The terms "forefoot portion" and / or "forefoot area" of a sole / midsole may refer to the front portion of the sole / midsole. The forefoot portion of the sole / midsole may cover an area of ​​the foot corresponding to the toes and toe bases. In one example, the forefoot portion may cover less than about half of the front of the underfoot portion or less than about one-third of the underfoot portion.

[0204] As used herein, the terms "underfoot area" and / or "underfoot portion" of a sole / midsole may be determined, for example, in a plane defined by the heel-to-toe axis and the medial-to-lateral axis of the sole / midsole. In other words, the underfoot area / underfoot portion of the sole / midsole may be measured substantially in a horizontal plane perpendicular to the vertical axis. The underfoot area / underfoot portion of the sole / midsole may be the area / portion that the bottom of the wearer's foot will contact when a shoe comprising such a sole is worn (regardless of the presence of an upper and / or insole).

[0205] As used herein, the term "upward direction" may be a direction from the foot portion of the upper to the upper portion of the upper. For example, the upward direction may be a direction from the foot portion of the upper to the instep portion of the upper. The upward direction may be substantially parallel to the vertical axis.

[0206] As used herein, the term "downward direction" may be directed substantially opposite to the upward direction.

[0207] The term "vertical axis" as used herein may generally correspond to a body axis of the wearer from head to feet when the wearer is standing on the ground.

[0208] Unless otherwise indicated, the term "substantially" or "essentially" used in this context may be understood as to a great extent or a significant extent, or for the most part, or essentially. In particular, manufacturing tolerances are included in this term.

[0209] The term "and / or" is only used to describe the association relationship of associated objects, and indicates that there may be three relationships. For example, A and / or B can represent three situations: that is, A exists alone, both A and B exist, and B exists alone. In addition, the character " / " in the present disclosure generally indicates that the previous and next associated objects form an "or" relationship.

[0210] Terms such as “bottom”, “top”, “one end”, “the other end”, “outside”, “above”, “above”, “inside”, “below”, “lower than”, “horizontal”, “coaxial”, “center”, “end”, “part”, “length”, “outer end”, etc., which indicate orientation or positional relationships, are based on the orientation or positional relationships shown in the drawings.

[0211] The terms "above", "higher than", "lower than", "below", etc. used in the present invention to indicate spatial relative positions are used for the purpose of convenience of explanation to describe the relationship of the soles, elements, parts, objects and / or features shown in the accompanying drawings relative to another sole, element, part, object and / or feature.

[0212] Description of the drawings

[0213] Figure 1 An upper, mid and lower layer 120 of a sole 101 for a shoe, particularly a sports shoe, according to an embodiment of the present disclosure is shown. Figure 2 A lower midsole layer 125 of a sole 101 for a shoe, particularly a sports shoe, is shown according to an embodiment of the present disclosure.

[0214] Soles 101 (in Figure 1 and Figure 2In the embodiment of the present invention, as will be understood by those skilled in the art, a complete sole 101 for a shoe (not shown) comprises: a midsole 110 comprising an upper midsole layer 120 and a lower midsole layer 125. As can be seen, the upper midsole layer 120 and the lower midsole 125 layers are at least partially different from each other. The sole 101 also comprises a shear structure 130 arranged 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.

[0215] The relative movement between the upper midlayer 120 and the lower midlayer 125 can be in a plane defined by the medial-to-lateral foot axis ML of the sole 101 and the heel-to-toe axis HT of the sole 101. In particular, the relative movement between the upper midlayer 120 and the lower midlayer 125 can be substantially parallel to the heel-to-toe axis HT of the sole 101. The heel-to-toe axis HT of the sole 101 and the medial-to-lateral foot axis ML of the sole 101 are in the plane defined by the medial-to-lateral foot axis ML of the sole 101. Figure 1 and Figure 2 Shown in.

[0216] Notice, Figure 1 and Figure 2 The upper mid-bottom layer 120 and the lower mid-bottom layer 125 are shown to be distinct from each other, meaning that they are separate from each other. However, and as described in more detail elsewhere, the upper mid-bottom layer 120 and the lower mid-bottom layer 125 can be at least partially distinct from each other. For example, they can be partially attached to each other and / or at least partially integrally formed.

[0217] The shear structure 130 can 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, the midfoot portion 112 of the midsole 110, the rearfoot portion 113 of the midsole 110, the lateral portion of the midsole 110 (close to the reference numeral 102 indicating the lateral side of the midsole 110), and / or the medial portion of the midsole 110 (close to the reference numeral 103 indicating the medial side of the midsole 110).

[0218] The shear structure 130 may be configured to allow relative movement between the upper midlayer layer 120 and the lower midlayer 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 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 midlayer layer 120 and the lower midlayer layer 125 in at least one of the lateral forefoot portion 111a of the midsole 110 and the lateral midfoot portion 112a of the midsole 110.

[0219] exist Figure 1 and Figure 2 , the lateral forefoot portion 111a of the midsole 110 and the lateral midfoot portion 112a of the midsole 110 are schematically indicated by dashed boxes. As will be appreciated by those skilled in the art, the boxes are schematic in nature and their precise ranges may vary. In addition, 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 schematically indicated by brackets. Moreover, as will be appreciated by those skilled in the art, their precise ranges may vary.

[0220] Notice, Figure 1 and Figure 2 The entire sole 101 is not shown. However, a portion of the sole 101 is described. Figure 1 and Figure 2 Reference numeral 101 is also provided in order to support understanding thereof.

[0221] As can be seen, the shear structure 130 includes an upper shear structure 131 located on the upper mid-layer 120 and a lower shear structure 136 located on the lower mid-layer 125. When assembled, the upper shear structure 131 and the lower shear structure 136 face each other (as shown in FIG. Figure 3 As will be appreciated by those skilled in the art, when the sole 101 is not assembled, the upper shear structure 131 and the lower shear structure 136 may not face each other. In addition, the upper shear structure 131 and the lower shear structure 136 may be arranged in any portion 111, 112, 113 of the midsole 110. Figure 1 and Figure 2 It is shown that the upper shear structure 131 and the lower shear structure 136 are arranged in the forefoot portion 111 of the midsole 110 and in the midfoot portion 112 of the midsole 110. In particular, as indicated by the dashed boxes, the upper shear structure 131 and the lower shear structure 136 are arranged in the lateral forefoot portion 111a of the midsole 110 and in the lateral midfoot portion 112a of the midsole 110. However, this is merely an example, and the present disclosure encompasses various arrangements.

[0222] When assembling (such as Figure 3 ), the upper shear structure 131 and the lower shear structure 136 at least partially engage with each other. In addition, the upper shear structure 131 and the lower shear structure 136 are substantially shaped to correspond to each other. For example, one of them can be formed in a negative form relative to the geometry of the other. When assembled, the upper shear structure 131 and the lower shear structure 136 engage with each other by a form-fitting connection (such as Figure 3101 ). It should be noted that the form-fit connection refers only to the shape of the upper shear structure 131 and the lower shear structure 136 when substantially no forces act on the sole 101. In particular, the form-fit connection should not be confused with a rigid connection. On the contrary, it also fully encompasses shearing movements, as described in more detail elsewhere herein.

[0223] In addition, if Figure 1 and Figure 2 As shown, the upper shear structure 131 is integrally formed with the upper mid-bottom layer 120 , and the lower shear structure 136 is integrally formed with the lower mid-bottom layer 125 .

[0224] Integrally forming the corresponding structures 131 and 136 can also be referred to as forming them into an integral piece. This can provide several advantages. For example, since integral pieces generally have fewer weak points and / or potential failure points compared to assemblies of multiple parts, strength and durability can be enhanced. This can result in increased overall strength and durability. In addition, integral pieces can be simpler and easier to manufacture and / or assemble because they can substantially eliminate the need for separate parts, fasteners or connectors, although this is not exclusive. This can also result in savings in production costs. In addition, integral pieces can reduce the total weight of the resulting structure and / or product. This may be particularly advantageous in the context of the sole 101 for shoes as proposed herein, where weight reduction can play a significant role. In addition, integral pieces can provide improved performance because wear, vibration, noise, etc. associated with separate moving parts can be reduced. In addition, by eliminating the need for additional parts, parts, elements, etc., forming the upper shear structure 131 integrally with the upper mid-bottom layer 120 and the lower shear structure 136 integrally with the lower mid-bottom layer 125 can reduce material costs, labor costs and / or assembly time. Furthermore, fewer parts generally mean a simplified construction, which can result in less waste of material during production and handling. This can contribute to a more sustainable and environmentally friendly sole 101.

[0225] However, as described elsewhere, separate configurations, i.e., upper shear structure 131 is not integrally formed with upper mid-base layer 120 and lower shear structure 136 is not integrally formed with lower mid-base layer 125, may also have advantages. For example, providing separate components rather than providing integrally formed components may facilitate more complex arrangements. In addition, additional functionality may be more easily imparted. Thus, the choice between integrally forming elements 131 and 120 and elements 136 and 125 and providing separate components may depend on various factors, such as the intended use, manufacturing process, material properties, desired outcome, desired functionality, and / or cost considerations.

[0226] It should be noted that a part of upper mid-bottom layer 120 and a part of lower mid-bottom layer 125 can be fixedly attached to each other. This is understood as the shearing motion of upper mid-bottom layer 120 and lower mid-bottom layer 125 may need some attachments. The part of upper mid-bottom layer 120 and the part of lower mid-bottom layer 125 can be fixedly attached to each other by any type of suitable attachment means, and the attachment means include but are not limited to one or more and / or its combination in the following: adhesive bonding, gluing, suturing, using mechanical fasteners, injection molding, welding, thermal bonding, compression molding, lamination, foam bonding, direct injection processing, foam encapsulation, molded construction, weld bonding, etc. It is understandable that the selection of attachment means can depend on various factors, such as the type of the sole 101 for shoes, the material used, the desired flexibility level and / or the manufacturing process adopted. Each kind of attachment means can provide its own advantages, and can be selected based on the specific requirements of sole 101.

[0227] It may be the case that the size of the area of ​​the upper mid-layer 120 and the lower mid-layer 125 that are fixedly attached may depend on the size of the shear structure 130. This may be the case because a maximum allowable friction force due to relative movement may exist. It is believed that by fixedly attaching a portion of the upper mid-layer 120 and a portion of the lower mid-layer 125, the maximum allowable friction force may be at least partially increased. In one example, approximately at least 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 underfoot area of ​​the midsole 110 may be fixedly attached to each other. Alternatively or additionally, approximately up to 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 underfoot area of ​​the midsole 110 may be fixedly attached to each other. Figure 1 and Figure 2 , a two-dimensional projection of the depicted upper midlayer layer 120 or the depicted lower midlayer layer 125 in a horizontal plane may form an underfoot region of the midsole 110 .

[0228] It should be noted that when the shear structure 130 is disposed 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 may be at least partially fixedly attached to each other. In other words, the upper midlayer layer 120 and the lower midlayer layer 125 may be fixedly attached to each other at portions where the shear structure 130 is not disposed.

[0229] Figure 3A sole for a shoe, in particular a sports shoe, according to an embodiment of the present disclosure is shown. Figure 3 Shown in assembled state Figure 1 and Figure 2 Embodiment of the invention.

[0230] One or more upper protrusions 132 and / or one or more lower protrusions 137 (at Figure 4 ) has a maximum height H perpendicular to the horizontal plane of the sole 101, which maximum height H is at least 2 mm and / or at most 20 mm, as described elsewhere herein.

[0231] Figure 3 Shear structure 130 is also shown to include a hollow space 135. Hollow space 135 is free of upper midsole layer 120 and / or lower midsole layer 125. It will be appreciated that the shape and size of hollow space 135 may vary under pressure loads on sole 101.

[0232] The hollow space 135 may be formed between the one or more upper protrusions 132 when the one or more lower recesses 138 are received (and / or formed between the one or more lower protrusions 137 when the one or more lower recesses 133 are received). Thus, the hollow space 135 may adopt a shape similar to the line segments described elsewhere herein (e.g., zigzag line segments, sawtooth line segments, etc.). This may have further advantages, i.e., ventilation, cooling, aesthetics, functionality, and / or similar performance may be improved. For example, the wearer's foot may be subjected to greater ventilation, which may reduce the accumulation of moisture. This also improves the life of the sole 101. In addition, when the hollow space 135 is fully exposed to the outside, the hollow space may be designed so that there are substantially no interfering objects from the environment, such as pebbles that may accumulate therein and / or may protrude therefrom. Therefore, the wearer's performance will not deteriorate and / or the wearer's attention will not be disturbed.

[0233] Additionally, the shear structure 130 may include a solid material, such as a foam material. Figure 3 In the embodiment of the present invention, this can be understood as a portion of the upper shear structure 131 formed integrally with the upper mid-bottom layer 120 includes a solid material, such as a foam material. In addition, a portion of the lower shear structure 136 formed integrally with the lower mid-bottom layer 125 also includes a solid material, such as a foam material.

[0234] Figure 3 The shear structure 130 is also shown to be at least partially visible when viewed from the outside. In particular, the shear structure 130 is visible from the lateral side 102 of the midsole 110 (eg, Figure 3The shear structure may have a sawtooth shape 139 viewed from the outside, preferably viewed from the lateral side 102 of the midsole 110 and / or the medial side 103 of the midsole 110. Figure 3 , the viewing direction may be from the lateral forefoot portion 111a of the midsole 110. Visibility of the shear structure 130 may be particularly important, as it may be advantageous for one to be able to easily assess the condition (eg, solidity, firmness, etc.) of the shear structure 130.

[0235] When viewed along the heel-to-toe axis HT, one or more protrusions 132, 137 (eg, Figure 4 ) may have Figure 3 The inclined surfaces shown are directed toward adjacent recesses 133, 138, which may be substantially continuous.

[0236] Although Figure 3 1, but the sole 101 may also include an outer sole disposed below the midsole 110, preferably below the lower midsole 125. It should also be understood that 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 attachment means, including but not limited to gluing / adhesive bonding, stitching, injection molding, etc.

[0237] Figure 4 Shows Figure 1 and Figure 2 Detailed view of the .

[0238] 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. In addition, 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 protrusion 132 can extend from the lateral side 102 of the midsole 110 to the midline 106 of the midsole 110 (at Figure 4 106 is substantially parallel to the heel-to-toe axis HT of the sole 101. Similarly, the upper recess 133, the lower protrusion 137, and / or the lower recess 138 may also extend from the lateral side 102 of the midsole 110 to near the midline 106 of the midsole 110. As described elsewhere, in the case where the shear structure 130 is disposed on the medial side 103 of the midsole 110, the protrusions 132, 137, and / or the recesses 133, 138 may extend from the medial side 103 of the midsole 110 to near the midline 106 of the midsole 110. However, a variety of different arrangements of the shear structure 130 are possible, as noted elsewhere herein.

[0239] When assembled, one or more upper protrusions 132 are at least partially received in one or more lower recesses 138. In addition, when assembled, one or more lower protrusions 137 are at least partially received in one or more upper recesses 133 (e.g., Figure 3 best seen in ).

[0240] exist Figure 4 , one or more upper protrusions 132 and / or one or more lower protrusions 137 are shown to be spaced apart from one another, as seen in the horizontal plane of the sole. Figure 4 , the distance w is indicated along the heel-to-toe axis HT of the sole 101 .

[0241] One or more upper protrusions 132 and / or one or more lower protrusions 137 may be spaced apart from each other by a distance w when viewed along the heel-to-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, most preferably at least 3 cm, and / or, wherein w is at most 8 cm, preferably at most 6 cm, more preferably at most 5 cm, even more preferably at most 4 cm, further more preferably at most 3.5 cm, most preferably at most 3 cm.

[0242] The one or more upper protrusions 132 and the one or more upper recesses 133 are arranged in an alternating manner as seen along the heel-to-toe axis HT of the sole 101. The same applies to the one or more lower protrusions 137 and the one or more lower recesses 138.

[0243] 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 in a way that they increase shear if this is desirable in some applications of the sole 101. It will be appreciated that the arrangement of the upper protrusions 132 and upper recesses 133 may vary depending on the type of sole 101 and its use.

[0244] One or more upper protrusions 132 and / or one or more lower protrusions 137 have an elongated shape with a longitudinal axis substantially parallel to the medial-to-lateral axis ML of sole 101 .

[0245] One or more upper protrusions 132 and / or one or more lower protrusions 137 have a shape seen in the horizontal plane of the sole 101, including one or more of a line segment defined by a mathematical function (particularly a periodic mathematical function, such as a sine wave), a zigzag line segment, a sawtooth line segment. Figure 4 In the embodiment, the shape is a zigzag or sawtooth shape.

[0246] Without wishing to be bound by theory, it is believed that these shapes allow for improved control of the movement of one or more upper protrusions 132 and / or one or more lower protrusions 137. For example, by interlocking the corresponding shapes, movement along the medial to lateral axis ML can be substantially prevented. However, shearing movement along the heel to toe axis HT is still allowed by the shear structure 130. Therefore, the kinetic energy can be significantly reduced. In this way, it is still possible that the internal solid deformation also contributes to the reduction of kinetic energy; however, in one example, the contribution of the shear structure 130 due to the shearing movement and its corresponding friction and heat generation may be greater than the solid deformation. In addition, a defined stop can be set along the heel to toe axis HT of the sole 101. This can increase safety because there is a defined stop that prevents any instability of the sole 101. All of these advantages can be equally applied to the shapes specified herein. The shapes can be understood in more detail as follows:

[0247] The zigzag line can be a pattern or path characterized by a series of substantially acute angles or turns. The pattern or path can produce a repeated "Z" shape and / or a series of interconnected diagonal lines. In addition to the added benefits of their function, the zigzag lines can also contribute to the appearance and / or tactile feel of the protrusions 132, 137.

[0248] A sawtooth line can be a geometric pattern or waveform similar to the teeth of a saw blade. It is characterized by a series of linear sawtooth-like peaks and valleys. Each peak can form an acute angle, and each valley can form a corresponding acute angle in the opposite direction. This can produce a repeating pattern similar to the teeth of a saw blade.

[0249] Note that line segments defined by mathematical functions may also help enhance the benefits of protrusions 132 , 137 .

[0250] Furthermore, the present disclosure may encompass any type of shape for one or more upper protrusions 132 and / or one or more lower protrusions 137, such as one or more of the following non-exhaustive list: rectangular, triangular, any periodic function, any form that allows horizontal movement of the upper middle layer 120 and the lower middle layer 125.

[0251] like Figure 4 As shown, the upper shear structure 131 may have five protrusions 132. The leftmost protrusion 132 has two zigzags or sawtooths. The three middle protrusions 132 have three zigzags or sawtooths. The rightmost protrusion 132 has two zigzags or sawtooths. Depending on what can be accurately understood as one zigzag or sawtooth, as will be understood by those skilled in the art, the number may vary slightly. The number of zigzags or sawtooths of the lower protrusion 137 may be the same as the number of zigzags or sawtooths of the lower protrusion 137. Figure 4 The number of zigzag or sawtooth shapes of the upper protrusions 132 shown in the lower portion is the same.

[0252] The one or more upper protrusions 132 and / or the one or more lower protrusions 137 include one or more side surfaces 134 (for simplicity, only one side surface 134 is indicated). The normal of the side surface 134 can be substantially parallel to the horizontal plane of the sole 101. The side surface 134 is relative to the medial to lateral axis ML of the sole 101 (also indicated by Figure 4 The dotted line in the lower part of Figure 4 As shown in . Angle α can be at least 5° and / or at most 80°, as described elsewhere herein. A preferred range of angle α can be about 30° to about 60°.

[0253] It should be noted that the brackets of reference numeral 130 indicate that the shear structure 130 includes an upper shear structure 131 and a lower shear structure 136 .

[0254] Figure 5 A sole plate 140 for a sole 101 of a shoe, in particular a sports shoe, according to an exemplary embodiment of the present invention is shown from two different sides. Figure 5 The top of FIG. 1 shows the sole plate 140 , wherein the upper surface 141 of the sole plate 140 faces the viewing direction. Figure 5 The bottom of the shoe sole plate 140 is shown, wherein the lower surface 142 of the shoe sole plate 140 faces the viewing direction.

[0255] When the sole 101 is assembled, the sole plate 140 is disposed between the upper midlayer layer 120 and the lower midlayer layer 125. The sole plate 140 is configured to control the relative movement between the upper midlayer layer 120 and the lower midlayer layer 125.

[0256] The sole plate 140 can be attached to the upper mid-layer 120 and / or the lower mid-layer 125. Any type of suitable attachment means is possible and is covered by the present disclosure. In one example, the sole plate 140 can be glued to the upper mid-layer 120 and / or the lower mid-layer 125. In another example, the sole plate 140 can be substantially attached to the upper mid-layer 120 and / or the lower mid-layer 125 by means of interlocking, form fitting, etc. This can be combined with additional attachment means such as fasteners, adhesives, etc.

[0257] In one example, sole plate 140 may include TPU. This may provide good sustainability, provide high flexibility, and exhibit improved longitudinal bending behavior. However, sole plate 140 may alternatively or additionally include 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.

[0258] The sole plate 140 includes protuberances 144 and / or indentations 143 that correspond to corresponding indentations 126 disposed in the lower mid-layer 125 and / or the upper mid-layer 120 (e.g., Figure 2 ) and / or protuberances 121 (as best seen in Figure 1 best seen in ).

[0259] The protuberances 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 arranged along the heel-to-toe axis HT of the sole 101. Moreover, the indentations 126 and / or protuberances 121 provided in the lower mid-layer layer 125 and / or the upper mid-layer layer 120 are elongated and arranged along the heel-to-toe axis HT of the sole 101. The indentations 143, 126 and / or protuberances 144, 121 have a substantially semicircular profile or a circular segment profile as seen along the heel-to-toe axis HT.

[0260] A circular segment profile 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 segment. In essence, a circular segment may be the curved area between an arc and two radii (lines connecting the center of a circle to the endpoints of the arc) that define the arc.

[0261] In one example, indentations 143 may be provided on upper surface 141 of sole plate 140. In one example, protrusions 144 may be provided on lower surface 142 of sole plate 140. Indentations 143 and / or protrusions 144 may be integrally formed with sole plate 140. In other examples, they may be attached by adhesive means, such as gluing.

[0262] Figure 5 The sole plate 140 is also shown to include a stopper element 145 that is arranged obliquely relative to the protuberance 144 and / or the indentation 143 of the sole plate 140. The stopper element 145 is arranged at the toe portion 111c (eg, Figure 5 ).

[0263] As can be imagined, through Figure 2 The indentation 126 of the lower midsole layer 125 is shown, and the sole plate 140 extends along the entire length l of the shear structure 130 (as shown in FIG. Figure 4 ) extends as seen in the heel-to-toe axis HT of the sole 101. It should be noted that the entire length l of the shear structure 130 is Figure 4 It is schematically shown in FIG.

[0264] Figure 6An upper mid-layer layer 120 and a lower mid-layer layer 125 for a sole 101 of a shoe, particularly a sports shoe, and a sole plate 140 for the sole 101 of a shoe are shown according to an embodiment of the present disclosure. Figure 6 The embodiment depicted in the present disclosure is similar to any other embodiment described in the present disclosure, which means that any features described in any other embodiment can also be applied to Figure 6 The same applies in reverse. Note that for the sake of brevity, Figure 6 Not all features of other embodiments are repeated and / or specified in one embodiment.

[0265] Soles 101 (in Figure 6 In the embodiment of the present invention, as understood by those skilled in the art, a complete sole 101 for a shoe (not shown) includes: a midsole 110 including an upper midsole layer 120 and a lower midsole layer 125. The upper midsole layer 120 and the lower midsole 125 layers are at least partially different from each other. The sole 101 also includes a shear structure 130 arranged 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 relative movement along the heel-to-toe axis HT.

[0266] As can be seen, the shear structure 130 includes an upper shear structure 131 located at the upper mid-bottom layer 120 and a lower shear structure 136 located at the lower mid-bottom layer 125. When assembled, the upper shear structure 131 and the lower shear structure 136 face each other.

[0267] Furthermore, when the sole 101 is assembled, the sole 101 includes a sole plate 140 disposed between the upper mid-layer layer 120 and the lower mid-layer layer 125. The sole plate 140 is configured to control relative movement between the upper mid-layer layer 120 and the lower mid-layer layer 125. The sole plate 140 includes a stopper element 145 that is arranged obliquely with respect to a heel-to-toe axis HT of the sole plate 140. The stopper element 145 is arranged in a toe portion of a forefoot portion of the midsole 110.

[0268] Figure 7 A shoe 100 , in particular a sports shoe, is shown, comprising a sole 101 and a sole plate 140 according to an embodiment of the present disclosure. Figure 7 The shoe 100 is shown from a side 102 outside the foot. Figure 7a From the inside side of the foot 103 is shown Figure 7 Embodiment of the invention. Figure 7 The embodiment depicted in the present disclosure is similar to any other embodiment described in the present disclosure, which means that any features described in any other embodiment can also be applied to Figure 7 The same applies in reverse. Note that for the sake of brevity, Figure 7Not all features of other embodiments are repeated and / or specified in one embodiment. Figure 7 The shoe 100 is depicted in an assembled state.

[0269] The shoe 100 depicted 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 of the embodiments described herein. In addition, the shoe 100 comprises an upper 150 attached to the sole 100. As in the previous embodiments, Figure 7 The sole 101 of the embodiment of the present invention comprises: a midsole 110 including an upper midsole layer 120 and a lower midsole layer 125. The sole 101 also comprises a shear structure 130 arranged 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 relative movement along the heel-to-toe axis HT. The shear structure 130 comprises an upper shear structure 131 located at the upper midsole layer 120 and a lower shear structure 136 located at the lower midsole layer 125. The upper shear structure 131 and the lower shear structure 136 face each other.

[0270] In addition, Figure 7 and Figure 7a One or more upper protrusions 132 and one or more lower protrusions 137 are shown (for the sake of simplicity, not all protrusions are shown).

[0271] In addition, the sole 101 includes a sole plate 140 disposed between the upper mid-layer 120 and the lower mid-layer 125. Figure 7a As best seen in , sole plate 140 can be seen from the exterior of shoe 100 .

[0272] In any embodiments of a sole 101 for a shoe as described herein, upper midsole layer 120 may include a first material and lower midsole layer 125 may include a second material, wherein the first material is different from the second material, or wherein the first material is substantially the same as the second material.

[0273] As an example, the first material and the second material may have different stiffnesses. This may provide an improved distribution of forces to the outsole of the sole 101 and / or to the ground.

[0274] As referred to herein, "stiffness" may be understood as rigidity or elastic modulus. It may refer to the ability of a material to resist deformation when subjected to an applied force. It may describe how much a material will deflect or stretch in response to an applied load. A more rigid material may undergo less deformation under the same load than a less rigid material. Stiffness is measured by Young's modulus, which quantifies the relationship between stress (force per unit area) and strain (deformation). Stiffness is generally related to a material's ability to maintain its shape and resist bending or flexing.

[0275] In any 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, includes or consists of a particle foam material, in particular a particle foam material including expanded thermoplastic polyurethane particles (eTPU), expanded polyamide particles (ePA), expanded polyether block amide particles (ePEBA) and / or expanded thermoplastic polyester ether elastomer particles (eTPEE).

[0276] In any embodiments of the sole 101 for a shoe as described herein, the midsole 110 , in particular the upper midsole layer 120 and / or the lower midsole layer 125 , includes or consists of a homogeneous foam material.

[0277] Homogeneous foam materials or homogeneous foams are known to those skilled in the art. In some cases, they are referred to as polymer foams, plastic foams. These foams are produced, for example, by injection molding or compression molding. In the case of a mold, a liquefied polymer material, which may contain a blowing agent, is usually placed in a mold cavity, and a process of foaming the polymer material is carried out in the mold cavity. Homogeneous foams typically do not have an identifiable granular structure, i.e. they do not substantially have any identifiable particles in the final foam.

[0278] On the other hand, particle foam materials or particle foams are different from homogeneous foams. In order to produce particle foams, expanded particles (or beads) are produced in a first step from a granular base material, which is foamed. These expanded beads can then be assembled in a second step to form a cohesive structure, wherein in the final foam, the individual particle boundaries are discernible, i.e. clearly visible. In this context, expansion means that each individual particle has a foam material core with many small foam cells, i.e. the particles may not consist of dense solid material.

[0279] 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 other aspects as described herein, and the details of the embodiments and / or examples may also 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.

[0280] Reference numerals list

[0281] 100 Shoes

[0282] 101 Soles for shoes

[0283] 102 Outer side of the midsole

[0284] 103 The inner side of the midsole

[0285] 106 Midsole center line

[0286] 110 midsole

[0287] 111 Forefoot part of the midsole

[0288] 111a The outer forefoot portion of the midsole

[0289] 111b The inner forefoot portion of the midsole

[0290] 111c Toe section of the forefoot portion of the midsole

[0291] 112 Midsole midfoot portion

[0292] 112a Midfoot portion of the midsole on the outside of the foot

[0293] 112b Medial midfoot portion of midsole

[0294] 113 Rear foot portion of the midsole

[0295] 120 Upper, middle and lower levels

[0296] 121 The protuberances of the upper, middle and lower layers

[0297] 125 Lower middle bottom

[0298] 126 Dents in the lower middle layer

[0299] 130 Shear Structure

[0300] 131 Upper shear structure

[0301] 132 upper protrusion

[0302] 133 upper concave part

[0303] 134 One or more side surfaces of the upper protrusion and / or the lower protrusion

[0304] 135 Hollow Space in Shear Structure

[0305] 136 Lower shear structure

[0306] 137 Lower protrusion

[0307] 138 concave part

[0308] 139 Sawtooth shape of shear structure

[0309] w Spacing between upper and / or lower projections

[0310] h one or more heights of one or more upper and / or lower projections

[0311] l The total length of the shear structure

[0312] 140 sole plate

[0313] 141 Upper surface of sole plate

[0314] 142 Lower surface of sole plate

[0315] 143 Dents on the sole

[0316] 144 Bumps on the sole

[0317] 145 Stop element

[0318] 150 Upper

[0319] HT Heel-to-toe axis of the sole (longitudinal direction)

[0320] ML The axis from the inside of the foot to the outside of the foot

[0321] UD Upward direction

[0322] DD Downward direction

[0323] α The angle between the lateral surface and the medial to lateral axis of the sole

Claims

1. 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), wherein the upper midsole layer (120) and the lower midsole layer (125) are at least partially different from each other; as well as a shear structure (130) disposed in the midsole (110); Wherein, the shear structure (130) is configured to allow relative movement between the upper middle bottom layer (120) and the lower middle bottom layer (125).

2. The sole (101) for shoes according to claim 1, wherein: The relative movement between the upper mid-layer (120) and the lower mid-layer (125) is in a plane defined by a medial-to-lateral foot axis (ML) of the sole (101) and a heel-to-toe axis (HT) of the sole (101), Wherein, the relative movement between the upper mid-layer layer (120) and the lower mid-layer layer (125) is preferably substantially parallel to the heel-to-toe axis (HT) of the sole (101).

3. The sole (101) for a shoe according to any one of the preceding claims, wherein: The shear structure (130) is configured to allow relative movement between the upper midsole layer (120) and the lower midsole layer (125) in at least one of a forefoot portion (111) of the midsole (110), a midfoot portion (112) of the midsole (110), a rearfoot portion (113) of the midsole (110), a lateral foot portion of the midsole (110), and a medial foot 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), for example, in 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), Most preferably, in at least one of a lateral forefoot portion (111a) of the midsole (110) and a lateral midfoot portion (112a) of the midsole (110).

4. The sole (101) for a shoe according to any one of the preceding claims, wherein: The shear structure (130) comprises an upper shear structure (131) on the upper middle layer (120) and a lower shear structure (136) on the lower middle layer (125), wherein the upper shear structure (131) and the lower shear structure (136) face each other. Wherein, the upper shear structure (131) and the lower shear structure (136) are preferably arranged in the forefoot portion (111) of the midsole (110) and / or the midfoot portion (112) of the midsole (110), and are most preferably arranged in the lateral forefoot portion (111a) of the midsole (110) and / or the lateral midfoot portion (112a) of the midsole.

5. The sole (101) for shoes according to claim 4, wherein: The upper shear structure (131) and the lower shear structure (136) at least partially engage one another.

6. The sole (101) for shoes according to claim 4 or 5, wherein: The upper shear structure (131) and the lower shear structure (136) are shaped substantially corresponding to each other.

7. The sole (101) for a shoe according to any one of the preceding claims 4 to 6, wherein: The upper shear structure (131) and the lower shear structure (136) engage with each other via a positive connection.

8. The sole (101) for a shoe according to any one of the preceding claims 4 to 7, wherein: The upper shear structure (131) is formed integrally with the upper middle and bottom layers (120), and the lower shear structure (136) is formed integrally with the lower middle and bottom layers (125).

9. The sole (101) for a shoe according to any one of the preceding claims, wherein: 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), and / or Wherein, 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).

10. The sole (101) for shoes according to claim 9, wherein: The one or more upper protrusions (132) are at least partially received in the one or more lower recesses (138), and / or Wherein, the one or more lower protrusions (137) are at least partially accommodated in the one or more upper recesses (133).

11. The sole (101) for shoes according to claim 9 or 10, wherein: The one or more upper protrusions (132) and / or the one or more lower protrusions (137) are spaced apart (w) from each other when viewed in a horizontal plane of the sole (101), preferably when viewed along a heel-to-toe axis (HT) of the sole (101).

12. The sole (101) for a shoe according to claim 11, wherein: The one or more upper protrusions (132) and / or the one or more lower protrusions (137) are spaced (w) from each other 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 when viewed in a horizontal plane of the sole (101), preferably when viewed along a heel-to-toe axis (HT) of the sole (101), and / or At most 8 cm, preferably at most 6 cm, more preferably at most 5 cm, still more preferably at most 4 cm, further more preferably at most 3.5 cm, most preferably at most 3 cm.

13. The sole (101) for a shoe according to any one of the preceding claims 9 to 12, wherein: The one or more upper protrusions (132) and the one or more upper recesses (133) are arranged in an alternating manner, preferably when viewed along a heel-to-toe axis (HT) of the sole (101).

14. The sole (101) for a shoe according to any one of the preceding claims 9 to 13, wherein: The one or more upper protrusions (132) and / or the one or more lower protrusions (137) have an elongated shape, preferably with a longitudinal axis substantially parallel to the medial to lateral axis (ML) of the sole (101).

15. The sole (101) for a shoe according to any one of the preceding claims 9 to 14, wherein: The one or more upper protrusions (132) and / or the one or more lower protrusions (137) have a shape seen in a horizontal plane of the sole (101), the shape comprising one or more of the following: a line segment defined by a mathematical function, in particular a periodic mathematical function such as a sine wave, a zigzag line segment, a sawtooth line segment.

16. The sole (101) for a shoe according to any one of the preceding claims 9 or 15, wherein: The one or more upper protrusions (132) and / or the one or more lower protrusions (137) include one or more side surfaces (134), the normal of which is substantially parallel to the horizontal plane of the sole (101), and the side surface (134) is angled relative to the medial to lateral axis (ML) of the sole (101), preferably having the following angle (α): at least 5°, preferably at least 10°, more preferably at least 15°, even more preferably at least 20°, further 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°, still more preferably at most 50°, further more preferably at most 45°, further more preferably at most 40°.

17. The sole (101) for a shoe according to any one of the preceding claims 9 to 16, wherein: The one or more upper protrusions (132) and / or the one or more lower protrusions (137) have a maximum height (h) perpendicular to the horizontal plane of the sole (101), the maximum height being: at least 2 mm, preferably at least 3 mm, more preferably at least 5 mm, still 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, still more preferably at most 14 mm, most preferably at most 12 mm.

18. The sole (101) for a shoe according to any one of the preceding claims, further comprising a sole plate (140) arranged between the upper mid-layer layer (120) and the lower mid-layer layer (125), wherein the sole plate is configured to control the relative movement between the upper mid-layer layer (120) and the lower mid-layer layer (125).

19. The sole (101) for a shoe according to claim 18, wherein: The sole plate (140) includes protuberances (144) and / or indentations (143) that engage with corresponding indentations (126) and / or protuberances (121) disposed in the lower mid-layer (125) and / or the upper mid-layer (120).

20. The sole (101) for a shoe according to claim 18 or 19, wherein: The protuberances (144) of the sole plate (140) are at least partially hollow and / or at least partially filled with foam.

21. The sole (101) for a shoe according to any one of the preceding claims 18 to 20, wherein: The sole plate (140) is elongated and arranged along a heel-to-toe axis (HT), wherein the indentations (126) and / or protrusions (121) provided in the lower mid-layer (125) and / or the upper mid-layer (121) are also elongated and arranged along the heel-to-toe axis (HT) of the sole (101).

22. The sole (101) for a shoe according to any one of the preceding claims 18 to 21, wherein: The indentations (143) and / or the protuberances (144) of the sole plate (140) have a generally semicircular profile or a circular segment profile, preferably when viewed along a heel-to-toe axis (HT).

23. The sole (101) for a shoe according to any one of the preceding claims 18 to 22, wherein: The sole plate (140) includes a stop element (145), which is arranged obliquely relative to the protrusion (121) and / or the indentation (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).

24. The sole (101) for a shoe according to any one of the preceding claims 18 to 23, wherein: The sole plate (140) extends along the entire length (l) of the shear structure (130) when viewed at a heel-to-toe axis (HT) of the sole (101).

25. The sole (101) for a shoe according to any one of the preceding claims, wherein: The shear structure (130) comprises a hollow space (135), preferably, the hollow space does not have the upper middle bottom layer (120) and / or the lower middle bottom layer.

26. The sole (101) for a shoe according to any one of the preceding claims, wherein: The shear structure (130) comprises a solid material, such as a foam material.

27. The sole (101) for a shoe according to any one of the preceding claims, wherein: The shear structure (130) is at least partially visible when observed 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).

28. The sole (101) for a shoe according to any one of the preceding claims, wherein: When observed from the outside, the shear structure (130) has a sawtooth shape (139), preferably when observed from the lateral side of the midsole (110) and / or the medial side of the midsole (110), more preferably when observed from the lateral forefoot portion (111a) of the midsole (110) and / or the medial forefoot portion (111b) of the midsole (110).

29. The sole (101) for a shoe according to any one of the preceding claims, wherein: The upper middle bottom layer (120) comprises a first material, and the lower middle bottom layer (125) comprises a second material, wherein the first material is different from the second material, or The first material and the second material are substantially the same.

30. The sole (101) for a shoe according to any one of the preceding claims, wherein: The midsole (110), in particular the upper mid-bottom layer (120) and / or the lower mid-bottom layer (125), comprises or is composed of a granular foam material, in particular a granular foam material comprising expanded thermoplastic polyurethane particles (eTPU), expanded polyamide particles (ePA), expanded polyether block amide particles (ePEBA) and / or expanded thermoplastic polyester ether elastomer particles (eTPEE).

31. The sole (101) for a shoe according to any one of the preceding claims, wherein: The midsole (110), in particular the upper midsole layer (120) and / or the lower midsole layer (125), comprises a homogeneous foam material or consists of a homogeneous foam material.

32. The sole (101) for a shoe according to any one of the preceding claims, wherein: A portion of the upper mid-bottom layer (120) and a portion of the lower mid-bottom layer (125) are fixedly attached to each other.

33. The sole (101) for a shoe according to any one of the preceding claims, wherein: The sole (101) further comprises an outer sole, which is arranged below the midsole (110), preferably below the lower midsole (125).

34. A shoe, in particular a sports shoe, such as a running shoe, comprising: A sole according to any one of the preceding claims; as well as An upper is attached to the sole (101).

35. A sole (101) for a shoe, in particular a sports shoe, such as a running shoe, comprising: A midsole (110) comprising an upper midsole layer (120) and a lower midsole layer (125), wherein the upper midsole layer (120) and the lower midsole layer (125) are integrally formed; as well as a shear structure (130) disposed in a midfoot portion (112) of the midsole (110) and / or a forefoot portion (111) of the midsole (110); Wherein, the shear structure (130) is configured to allow relative movement between the upper middle bottom layer (120) and the lower middle bottom layer (125).

36. A method for manufacturing a sole (101) for a shoe, in particular a sports shoe, such as a running shoe, preferably a shoe according to any one of the preceding claims 1 to 35, comprising: Providing a midsole (110) comprising an upper midsole layer (120) and a lower midsole layer (125), wherein the upper midsole layer (120) and the lower midsole layer (125) are at least partially different from each other; Providing a shear structure (130) disposed in the midsole (110); Wherein, the shear structure (130) is configured to allow relative movement between the upper middle bottom layer (120) and the lower middle bottom layer (125).

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