midsole

Abstract

This article discloses a midsole (1) for a shoe, the midsole (1) comprising: a plurality of first channels (2a, 2b, 2c) extending from a first side of the midsole (1) in a direction toward a second side of the midsole (1), wherein the second side of the midsole (1) is arranged opposite to the first side of the midsole (1), wherein the first channels (2a, 2b, 2c) do not extend to the second side of the midsole (1); a plurality of second channels (3a, 3b, 3c) different from the first channels (2a, 2b, 2c), wherein the second channels (3a, 3b, 3c) extend from the second side of the midsole (1) in a direction toward the first side of the midsole (1), wherein the second channels (3a, 3b, 3c) do not extend to the first side of the midsole (1); wherein the first channels (2a, 2b, 2c) and the second channels (3a, 3b, 3c) are offset from each other.

Description

Technical Field

[0001] This invention belongs to the field of footwear cushioning technology, and relates to a midsole for shoes and a shoe including such a midsole. Background Technology

[0002] Cushioned soles are primarily used in various athletic shoes to prevent injuries such as knee, ankle, hip, and back injuries. This is particularly important in sports that generate repetitive, high-impact activities, such as running. To prevent these injuries, many different cushioning systems have been developed over time. These include, for example, air chambers, resilient elements, advanced polymer foams, shock-absorbing structures, and channel cushioning. The latter typically envisions a channel in the sole structure that extends entirely from the inside to the outside of the sole. Thus, such channels each have two openings: a lateral opening on the outside of the sole and a medial opening on the inside of the sole. Typically, the channel is filled with ambient air. The channel is fluidly connected to the environment by means of the medial and lateral openings. If the sole is subjected to force, the sole may deform, causing the open area of ​​the channel to decrease as air inside the channel is expelled through the medial and lateral openings, and the channel wall sections defining the channel move toward each other. A significant advantage of this type of channel cushioning compared to many other systems is the ease of manufacturing the sole, as the channel can be directly introduced during molding or foam molding using suitable molding pins. Furthermore, these soles can be manufactured as single pieces because cushioning systems are easier to produce operationally and do not require multiple different parts that must be assembled together as in other cushioning systems. For example, in an inflatable airbag cushioning system, the airbag shell must be made of a different material than the rest of the sole because it must be airtight. Additionally, shock-absorbing cushioning structures typically require different materials for the cushioning structure compared to the rest of the sole. Therefore, channel cushioning has advantages in terms of ease of production, material requirements, cost, and recyclability because it requires fewer different materials.

[0003] However, the problem with this type of channel cushioning is that the channel can lead to instability, especially during stomping (i.e., when the foot contacts the ground). This is particularly problematic if the stomping is not neutral (neutral means the sole extends parallel to the ground) but occurs during pronation or supination of the runner's foot. This can be caused by the runner's anatomical predispositions or by uneven ground surfaces such as steps, stones, branches, etc. While channel cushioning as described above achieves good cushioning, it can lead to this type of instability, which can result in both immediate injury and long-term problems. Summary of the Invention

[0004] The general object of this invention is to improve upon existing cushioning footwear technology and preferably to overcome, in whole or at least in part, the disadvantages of the prior art. In an advantageous embodiment, a midsole is provided that has the advantages of a channel cushioning system while preventing instability, particularly during stomping, which can cause immediate injury or long-term problems for runners.

[0005] This general objective is achieved through the subject matter of the independent claims. Further advantageous embodiments arise from the dependent claims and the entire disclosure.

[0006] A first aspect of the invention relates to a midsole for shoes, particularly running shoes. A second aspect of the invention relates to a sole structure having such a midsole, and a third aspect of the invention relates to a shoe having such a midsole or such a sole structure.

[0007] The midsole may include multiple first channels and multiple second channels different from the first channels. The first channels extend from a first side of the midsole in a direction toward a second side of the midsole (i.e., toward the second side of the midsole). The second side of the midsole is arranged opposite to the first side of the midsole. As will be described in further detail below, for example, it may be possible for the first and second sides to be the outer and inner sides of the midsole, or the top and bottom sides of the midsole. The first channels may not extend to (i.e., all the way to) the second side of the midsole. That is, the first channels may not penetrate the midsole from the first side to the second side. In contrast, the first channels begin from the first side, extend toward the opposite second side, and have channel ends spaced apart from the second side.

[0008] The second channel may extend from the second side of the midsole toward the first side of the midsole. The second channel may not extend to (i.e., all the way to) the first side of the midsole. That is, the second channel may not run through the midsole from the second side to the first side. In contrast, the second channel begins from the second side and extends toward the opposite first side, having channel ends spaced apart from the first side. Furthermore, the first and second channels may be specifically offset from each other. Specifically, all first and second channels may be offset from each other. The first and second channels may specifically extend toward each other. However, because they are offset from each other, they do not face each other directly. In a particular embodiment, the first and second channels are completely (i.e., entirely) offset from each other.

[0009] As described herein, a midsole typically has a midsole tip and a heel edge, the midsole tip defining the front boundary of the midsole, and the heel edge arranged opposite to the midsole tip and defining the rear end of the midsole. Furthermore, the midsole may have outer and inner sides arranged opposite to each other and may meet at the midsole tip and heel edge. The midsole may also include a top side and an oppositely arranged bottom side. The top side faces the wearer's foot or is positioned closer to the wearer's foot in the wearing state, and the bottom side faces the ground or is positioned closer to the ground in the wearing state.

[0010] As used in this disclosure, directional indications should be understood as follows: The longitudinal direction of the midsole is described by an axis from the heel region (or from the heel edge) to the forefoot region (or the midsole tip), and thus extends along the longitudinal axis of the midsole. The lateral direction of the midsole extends transversely to the longitudinal axis and substantially parallel to the bottom side of the midsole, or substantially parallel to the ground in the operational (i.e., wearing) state. Therefore, the lateral direction extends along the lateral axis of the midsole. In the context of this invention, the vertical direction V refers to the direction from the bottom side to the top side of the midsole, or in the direction of the wearer's foot in the operational state, and thus extends along the vertical axis of the midsole or sole. The longitudinal, vertical, and lateral directions may all be perpendicular to each other. The outer side of the midsole is the outer periphery of the midsole between the heel edge and the midsole tip, which abuts against the outer instep of the wearer's foot in the wearing state. The indication "horizontal" refers to a plane extending in both the longitudinal and lateral directions and perpendicular to the vertical direction. The inner side of the midsole refers to the inner periphery of the midsole between the heel edge and the midsole tip, which is opposite to the outer side. Therefore, in a pair of running shoes, the inner sides of the two shoes face each other, while the outer sides face away from each other. Furthermore, the midsole is typically divided longitudinally into a forefoot region, a heel region, and a midfoot region located between the forefoot and heel regions. For example, the forefoot region extends from the tip of the midsole against the longitudinal direction (i.e., opposite to the longitudinal direction) for 30% to 45% of the total longitudinal length of the midsole. The heel region extends longitudinally, for example, from the heel edge for 20% to 30% of the total longitudinal length of the midsole. The midfoot region extends directly between the heel and forefoot regions, such that the longitudinal length of the midfoot region constitutes the remaining portion of the total length, specifically 15% to 50%.

[0011] In this document, it is generally understood that the term "comprising" is interpreted as meaning that it includes the features that follow the term, but it does not exclude the presence of other features, provided they do not render the claim unenforceable. On the other hand, if the phrase "consisting of..." is used, then there are no other features besides the features that follow the phrase.

[0012] In some embodiments, the first channel and the second channel are offset from each other along the longitudinal direction. This means that, if traveling along the longitudinal direction, for example from the heel edge to the midsole tip, the first and second channels, which are generally inclined, and particularly perpendicular to the longitudinal direction, are not facing each other, but are offset from each other. For example, a given first channel may be arranged closer to the heel edge than a given second channel, particularly an adjacent second channel.

[0013] In some embodiments, the first channel and the second channel are configured as blind holes. Therefore, in some embodiments, the invention may relate to a midsole for a shoe, the midsole comprising: a. A plurality of first channels, configured as blind holes and extending from a first side of the midsole toward a second side of the midsole, wherein the second side of the midsole is arranged opposite to the first side of the midsole; b. Multiple second channels, which differ from the first channel, wherein the second channels are constructed as blind holes and extend from the second side of the midsole toward the first side of the midsole; The first and second channels are offset from each other.

[0014] In some embodiments, the midsole may include at least three, particularly at least five, more particularly at least seven first channels and at least three, particularly at least five, more particularly at least seven second channels.

[0015] In some embodiments, the midsole may include a first channel between 3 and 20, particularly between 5 and 15, more particularly between 7 and 12, or even more particularly between 7 and 10. In some embodiments, the midsole may include a second channel between 3 and 20, particularly between 5 and 15, more particularly between 7 and 12, or even more particularly between 7 and 10.

[0016] In some embodiments, at least some of the first channels and at least some of the second channels are arranged alternately with each other. In particular, the first channels and the second channels may be arranged alternately along the longitudinal direction. This means that if traveling along the longitudinal direction from the heel edge to the tip of the midsole, the first channel will be present first, then the second channel will be present closer to the tip of the midsole, then the first channel will be present again closer to the tip of the midsole, then the second channel will be present again closer to the tip of the midsole, and so on.

[0017] In some embodiments, the midsole includes alternating and / or non-alternating sections. In alternating sections, first and second channels are arranged alternately. In contrast, in non-alternating sections, first and second channels are not arranged alternately. Non-alternating sections may, for example, contain more than two, particularly more than three, adjacent first channels or more than two, particularly more than three adjacent second channels. In certain embodiments, such non-alternating sections may consist only of first channels (in which case it may be referred to as a first non-alternating section, or, if the first channel is a medial channel, a medial non-alternating section), or it may consist only of second channels (in which case it may be referred to as a second non-alternating section, or, if the second channel is a lateral channel, a lateral non-alternating section). It should be understood that such sections may be sections extending over the entire lateral extension of the midsole. Non-alternating sections can be advantageous because they provide cushioning in very specific areas, where, for example, opposite sides do not contain channels and are therefore more stable. In some embodiments, such non-alternating sections are arranged in the midfoot region of the midsole.

[0018] As outlined above, the first and second channels can be arranged offset from each other along the longitudinal direction. Therefore, the alternating sections can be as follows: if traveling longitudinally from the heel edge to the midsole tip, the first channel may first exist, followed by a second channel offset longitudinally and positioned closer to the midsole tip, then another first channel offset again and positioned closer to the midsole tip, and so on. In contrast, if traveling longitudinally in a non-alternating section, the first channel may first exist, and the next adjacent channel may again be a first channel positioned closer to the midsole tip, and the next channel may again be a first channel positioned closer to the midsole tip, and so on.

[0019] In a typical embodiment, the first channel and the second channel are separate from each other. For example, the first channel and the second channel are not connected to each other.

[0020] In some embodiments, the first channel and the second channel intersect each other in an interlacing region. Such an interlacing region may be, for example, a centrally located interlacing region or an intermediate interlacing region, as described in some embodiments herein. The interlacing region is preferably characterized in that at least one or even all of the first channels and at least one or even all of the second channels are arranged in the interlacing region. Furthermore, the interlacing region may be generally sandwiched between a first edge region and a second edge region. The first edge region is particularly characterized in that only the first channel is arranged in the first edge region, or extends through the first edge region. The second edge region is particularly characterized in that only the second channel is arranged in the second edge region, or extends through the second edge region. In a particular embodiment, the first channel and the second channel intersect each other in the interlacing region along the longitudinal direction of the midsole. That is, when traveling along the longitudinal direction (e.g., from the heel edge to the tip of the midsole) in the interlacing region, the first channel and the second channel are passed through. In contrast, when traveling along the longitudinal direction in the first edge region, only the first channel is passed through, and when traveling along the longitudinal direction in the second edge region, only the second channel is passed through.

[0021] In some embodiments, the staggered regions (such as centrally located staggered regions or intermediate staggered regions) extend in the longitudinal direction of the midsole between the first (“first” is a number, not a group of first channels) channel (i.e., the rearmost first or second channel) seen from the heel edge to the first (“first” is a number, not a group of first channels) channel (i.e., the foremost first or second channel) channel seen from the midsole tip. It is also possible that the staggered regions (such as centrally located staggered regions or intermediate staggered regions) extend entirely from the heel edge to the midsole tip in the longitudinal direction. In the lateral direction, the centrally located staggered regions, as described in some embodiments herein, may be defined outwardly by the inner channel, particularly by the end of the inner channel, and inwardly by the outer channel, particularly by the end of the outer channel. Generally, the staggered regions may be defined in the lateral direction towards a first side by a second channel, particularly by the end of the second channel, and towards a second side by a first channel, particularly by the end of the first channel.

[0022] In some embodiments, all first and second channels are offset from each other. Therefore, there may be no first and second channels that are aligned or even partially aligned with each other along a certain direction, particularly the vertical and / or longitudinal and / or lateral directions.

[0023] In some embodiments, the first channel is an inner channel extending from the inner side of the midsole in a direction toward the outer side of the midsole (e.g., toward the outer side of the midsole). Furthermore, the second channel is an outer channel extending from the outer side of the midsole in a direction toward the inner side of the midsole (e.g., toward the inner side of the midsole).

[0024] In other words, in such embodiments, the midsole according to the present invention may include the following: a. Multiple inner channels extending from the inside of the midsole toward the outside of the midsole, wherein the inner channels do not extend to the outside of the midsole; b. Multiple outer channels, constructed as blind holes and extending from the outer side of the midsole toward the inner side of the midsole, wherein the outer channels do not extend to the inner side of the midsole; The outer and inner channels are offset from each other.

[0025] In some embodiments, the first channel is an inner channel configured as a blind hole extending from the inside of the midsole toward the outside of the midsole. Furthermore, the second channel is an outer channel configured as a blind hole extending from the outside of the midsole toward the inside of the midsole.

[0026] In other words, in such an embodiment, the midsole according to the present invention may include the following: a. Multiple inner channels, constructed as blind holes and extending from the inside of the midsole towards the outside of the midsole; b. Multiple outer channels, constructed as blind holes and extending from the outer side of the midsole toward the inner side of the midsole; The outer and inner channels are offset from each other.

[0027] Therefore, the inner channels typically each include an opening on the inner side of the midsole, from which the channel extends toward the oppositely arranged outer side of the midsole, for example as a blind hole. Conversely, the outer channels typically each include an opening on the outer side of the midsole, from which the channel extends toward the oppositely arranged inner side of the midsole, for example as a blind hole.

[0028] In some embodiments, the outer channels extend from the outside to the inside along the lateral direction of the midsole. In some embodiments, the outer channels extend parallel to each other.

[0029] In some embodiments, the inner channels extend from the inside to the outside along the lateral direction of the midsole. In some embodiments, the inner channels extend parallel to each other, and optionally also extend parallel to the outer channels.

[0030] In some embodiments, the inner and outer channels intersect each other in a centrally located, staggered area of ​​the midsole. It should be understood that such a central area is located in an area between the outer and inner sides of the midsole. In some embodiments, the centrally located area typically extends longitudinally (i.e., in the longitudinal direction). The inner and outer channels intersecting each other in such a centrally located, staggered area typically extend primarily or entirely in the lateral direction of the midsole.

[0031] Interleaving means that at least one or even all medial channels and at least one or even all lateral channels extend through the interleaved area. While it is possible for medial and lateral channels to be arranged alternately in the interleaved area, in some embodiments, it is possible for non-alternating segments as described above to exist in the interleaved area. However, preferably, at least some of the medial and lateral channels are arranged alternately in the interleaved area. Thus, both lateral and medial channels are present in the interleaved area. This significantly increases the cushioning function in the interleaved area because the number of channels increases, especially compared to the outer segments (i.e., the edge areas described further below), which may even double. However, because the interleaved area is centrally located, this does not lead to significant instability, particularly pronation or supination instability of the foot.

[0032] In some embodiments, the midsole includes an outer edge region. This outer edge region may be located between the outer side of the midsole and an intersecting region of the midsole. Furthermore, compared to the intersecting region, only the outer channels, specifically all the outer channels, extend through the outer edge region. In contrast, the inner channels typically do not extend through the outer edge region, or are not located within it. This embodiment has the advantage that the outer edge region is more stable than a centrally located intersecting region, providing additional stability and preventing supination. However, due to the presence of the outer channels, a cushioning effect still exists in the outer edge region, while most of the impact force is absorbed by the centrally located intersecting region.

[0033] In some embodiments, the midsole includes an inner edge region. Such an inner edge region may be arranged between the inner side of the midsole and the staggered region of the midsole. Furthermore, compared to the staggered region, only the inner channels, particularly all the outer channels, extend through the inner edge region. In contrast, the outer channels typically do not extend through the inner edge region, or are not arranged within it. This embodiment has the advantage that the inner edge region is more stable than the centrally arranged staggered region, providing additional stability and preventing pronation. However, due to the presence of the inner channels, a cushioning effect still exists in the inner edge region, while most of the impact force is absorbed by the centrally arranged staggered region. In a preferred embodiment, the midsole includes both an inner edge region and an outer edge region as described herein. Therefore, in this embodiment, the outer edge region and the inner edge region sandwich a centrally arranged staggered region. Specifically, the centrally arranged staggered region may be circumferentially surrounded by the inner edge region and the outer edge region. In some embodiments, the inner and outer edge regions may even completely surround the centrally located staggered region in a horizontal plane defined by the longitudinal and transverse directions.

[0034] In some embodiments, the shape of the interlacing region follows the major joints of the human foot, which effectively supports foot movement during running, and particularly its rolling motion. The shape of the interlacing region may specifically refer to the outer periphery of the portion of the midsole in which the medial and lateral channels intersect.

[0035] In some embodiments, the interlacing region has a curved shape. In a particular embodiment, the shape of the interlacing region is curved over 80% to 100% of its length. In other words, any straight (e.g., linear) portion of the interlacing region exists at most 20% of its length. Length refers to the extension of the interlacing region along the longitudinal direction of the midsole. Such a curved shape reflects the anatomical prerequisites of the human foot, such as the arch, and thus effectively supports rolling movements during running. The curved shape typically refers to the horizontal shape of the interlacing region, i.e., its shape in a plane defined by the longitudinal and lateral directions.

[0036] In some embodiments, the curved shape of the staggered region includes, or defines, a front vertex and a rear vertex. The front vertex is arranged closer to the tip of the midsole than the rear vertex. As those skilled in the art will understand, a vertex is a point on the curve where the curve experiences a local maximum or minimum (i.e., the first derivative of the curve is zero at that point). It should be understood that the curved shape relates to or is referenced to a coordinate system in which the longitudinal direction represents the x-axis and the lateral direction represents the y-axis. Thus, the curved shape will be represented by a function f(x). Because the staggered region has a curved shape, particularly in the horizontal plane (i.e., a plane defined by the longitudinal and lateral directions), the curved shape can describe the front and rear vertex, especially in the horizontal plane. In such embodiments, the staggered region is ideally arranged relative to the anatomy of the human foot, and thus allows for optimal rolling movement and minimal energy loss during running.

[0037] In some embodiments, the curved shape extends in an outside-to-inside direction between the rear vertex and the front vertex. This means that the staggered region extends longitudinally from the rear vertex, but is also curved such that it (e.g., only) extends in an outside-to-inside direction until it reaches the front vertex. Therefore, this does not mean that the staggered region extends strictly in the lateral direction, but rather that it may be inclined or oblique and / or that it extends longitudinally, but also extends in an inside direction.

[0038] In some embodiments, the curved shape extends in an inside-to-outside direction between the rear boundary and the rear vertex of the staggered region. That is, starting from the rear boundary, the staggered region extends in the longitudinal direction and is also curved such that it extends in an inside-to-outside direction until it reaches the rear vertex. Therefore, this does not mean that the staggered region extends strictly in the transverse direction, but rather that it can be inclined or oblique and / or that it extends in the longitudinal direction but also in an outward direction between the rear boundary and the rear vertex. The rear boundary is the final part of the staggered region, which is typically located in the heel region and can even be the heel edge.

[0039] In some embodiments, the curved shape extends in a medial-to-lateral direction between the anterior apex and the anterior boundary of the interlocking region. That is, starting from the anterior apex, the interlocking region extends in the longitudinal direction and is also curved such that it extends in a medial-to-lateral direction until it reaches the anterior boundary. Therefore, this does not mean that the interlocking region extends strictly in the lateral direction, but rather that it can be inclined or oblique and / or it extends in the longitudinal direction, but also extends in a lateral direction between the anterior apex and the anterior boundary. The anterior boundary is the foremost portion of the interlocking region, which is typically located in the forefoot region and can even be at the tip of the midsole.

[0040] In some embodiments, the front apex is positioned at a distance of 10% to 35% (e.g., between 10% and 35%, particularly 15% to 30%) of the total length of the midsole from the midsole tip. The total length of the midsole is the longitudinal distance between the foremost point of the midsole (i.e., the midsole tip) and the rearmost point of the midsole (i.e., the heel edge). Therefore, in such embodiments, the front apex is spaced from the midsole tip by 10% to 35%, particularly 15% to 30%, of the total length of the midsole. This is advantageous because it ensures that the front apex is positioned below the wearer's metatarsophalangeal joints, particularly the metatarsophalangeal joints.

[0041] In some embodiments, the heel apex is positioned at a distance of 15% to 50%, particularly 20% to 40%, from the heel edge of the midsole to the total length of the midsole. Therefore, in such embodiments, the heel apex is spaced 15% to 50%, particularly 20% to 40%, from the heel edge of the midsole. Positioning the heel apex at this distance provides effective cushioning because it ensures that the staggered area is positioned below the point of highest impact on the human foot during stepping.

[0042] In some embodiments, the curved shape of the interlacing region includes an inflection point between the front and rear apexes. As understood by those skilled in the art, the inflection point of the curve or curved shape is a point where the direction of the curve changes (e.g., a left curve becomes a right curve or vice versa). Mathematically, the second derivative at the inflection point is 0. Optionally, the inflection point is located at 45% to 65% of the total length of the midsole from the heel edge. That is, the inflection point is spaced 45% to 65% of the total length of the midsole from the heel edge.

[0043] In some embodiments, the centrally arranged staggered areas, in particular their curved shape, have a width of 15% to 50%, particularly 20% to 40%, and more particularly 25% to 35% of the total width of the midsole at a given longitudinal position (i.e., extending in the lateral direction).

[0044] In some embodiments, the channels configured as blind holes may be completely defined by the midsole (e.g., by a midsole material, such as a polymer foam material), except for optional corresponding channel openings. In particular, the channels may be completely defined by the midsole in a plane defined by the longitudinal and vertical directions.

[0045] In some embodiments, the outer and / or inner channels are slits that each open toward the top side of the midsole. Thus, the slits are open or accessible not only from their inner or outer openings but also from the top side of the midsole. However, they do not extend completely through the midsole in either the vertical or lateral direction, and are therefore still constructed as blind holes. As used herein, the term "blind hole" means that a corresponding channel constructed as a blind hole extends from one side (such as a first or second side, or an inner or outer side) toward the opposite side, but does not extend completely through the midsole in that direction, and therefore does not extend to the opposite side. In other words, while the channel may have an opening on the side from which it extends, it does not have an opening on the opposite side toward which it extends. However, in some embodiments described herein, the channels constructed as blind holes are generally fully defined by the midsole (e.g., by the midsole material, such as a polymer foam material), in addition to the optional corresponding channel openings, particularly in a plane defined by the longitudinal and vertical directions. Embodiments in which the outer and / or inner channels are slits are advantageous because they allow for shear deformation of the sole and also enable opposing channel wall segments to contact each other under such shear and forces generated during running. This allows for improved cushioning of horizontal forces through initial deformation while still ensuring stable standing once the opposing channel wall segments contact each other. Furthermore, arranging the slits so that they open towards the top provides significantly improved cushioning compared to slits that open towards the bottom.

[0046] In some embodiments, the slits each extend from the top side of the midsole, thus only partially penetrating the midsole towards the bottom side. However, as mentioned above, the slits do not penetrate the midsole from the top side to the bottom side.

[0047] In some embodiments, each slit has a slit width of 0.1 mm to 10 mm, particularly 0.5 mm to 7.5 mm. The slit width is the extension of the slit along the longitudinal direction and represents the distance between opposing channel wall segments.

[0048] In some embodiments, the midsole section between two adjacent slits of the same type (i.e., the outer slit or the inner slit) is larger than the slit width of each of the adjacent slits of the same type. For example, the midsole section between two adjacent slits of the same type may have a width of 1 mm to 30 mm, particularly 5 mm to 20 mm. In some embodiments, the width of the midsole section between two adjacent slits of the same type may be between 2 and 10 times, particularly 3 to 5 times, the slit width of one of the adjacent slits of the same type.

[0049] In some embodiments, each slit may have a height of 30% to 80%, particularly 40% to 70%, of the total height of the midsole. The height of the slit is the length of the slit along its extension in the direction from the bottom side to the top side of the midsole. The total height of the midsole is the distance between the top and bottom sides of the midsole.

[0050] In some embodiments, each slit extends obliquely toward the heel edge in a direction from the top side to the bottom side of the midsole. In other words, the opposing channel wall sections of the slits extend obliquely parallel toward the heel edge. Thus, the slits, or their opposing channel wall sections, have both vertical and longitudinal extensions. Such embodiments are advantageous because they provide not only improved cushioning but also a stable stance. Furthermore, since the midsole is typically made of an elastic material (such as elastic, particularly viscoelastic, polymer foam), such slits generate a spring-like forward propulsion upon forced deformation, which supports the runner's movement.

[0051] In some embodiments, the outer channel and / or the inner channel are completely defined by the midsole in a cross-section along the longitudinal direction and perpendicular to the transverse direction of the midsole. In such embodiments, the inner channel opens only inward and is otherwise completely defined by the midsole. Conversely, the outer channel opens only outward and is otherwise completely defined by the midsole.

[0052] In some embodiments, each medial channel includes a medial opening on the medial side of the sole. Thus, the medial channel is in direct fluid communication with the external environment via its medial opening. In a particular embodiment, the medial opening of each medial channel may be a unique opening for each medial channel. Otherwise, the medial channels may be entirely defined by the midsole. Because the medial channels are constructed as blind holes, they extend from the medial opening on the medial side of the channel on the medial side of the midsole toward the lateral side of the midsole.

[0053] In some embodiments, each lateral channel includes a lateral opening on the outer side of the sole. Thus, the lateral channel is in direct fluid communication with the external environment via its lateral opening. In a particular embodiment, the lateral opening of each lateral channel may be a unique opening for each lateral channel. Otherwise, the lateral channels may be entirely defined by the midsole. Because the lateral channels are constructed as blind holes, they extend from the lateral opening of the channel on the outer side of the midsole toward the inner side of the midsole.

[0054] In some embodiments, the midsole, and particularly the outer and / or inner channels, is configured such that the inner and / or outer openings deform horizontally and / or vertically, particularly sheared, under the forces generated during running, causing them to close completely. The forces generated during running are typically exerted by runners weighing 40 kg to 120 kg, particularly 50 kg to 100 kg, running at speeds of 8 km / h to 12 km / h on flat ground. When fully closed, friction locking and a stable stance are achieved. Furthermore, push-off becomes effective because the push-off force can be readily utilized and is not lost due to further channel deformation.

[0055] In some embodiments, the first channel is a top channel configured as a blind hole extending from the top side of the midsole toward the bottom side of the midsole. Furthermore, in such embodiments, the second channel may be a bottom channel configured as a blind hole extending from the bottom side of the midsole toward the top side of the midsole. Therefore, in this case, the opposing first and second sides are the top and bottom sides of the midsole.

[0056] Therefore, in some embodiments, the midsole may include: a. Multiple top channels, constructed as blind holes and extending from the top side of the midsole toward the bottom side of the midsole; b. Multiple bottom channels, constructed as blind holes and extending from the bottom side of the midsole towards the top side of the midsole; The top channel and the bottom channel are offset from each other.

[0057] This type of implementation allows for shearing of the top and bottom channels, which ultimately results in elastic deformation and closure under the forces generated during running. During push-off, the midsole elastically returns to its original shape, causing the top and bottom channels to open and thus leading to forward propulsion, resulting in more efficient energy transfer. The top and bottom channels work synergistically and significantly enhance this effect. Furthermore, the blind-hole construction of the channels ensures a stable stance.

[0058] In some embodiments, the top channel extends vertically and particularly obliquely from the top side of the midsole toward the bottom side of the midsole. In some embodiments, the top channel extends obliquely from the top side toward the bottom side in the direction of the heel edge of the midsole. In other words, the top channel extends along an oblique axis that intersects the top side of the midsole closer to the tip of the midsole than where it intersects the bottom side of the midsole. In some embodiments, each top channel has a top opening on the top side and extends from the top opening in the direction of the heel edge.

[0059] In some embodiments, the bottom channels extend vertically and, particularly obliquely, from the bottom side of the midsole toward the top side of the midsole. In some embodiments, the bottom channels extend obliquely from the bottom side toward the top side in the direction of the midsole tip. In other words, the bottom channels extend along an oblique axis that intersects the bottom side of the midsole closer to the heel edge than where it intersects the top side of the midsole. In some embodiments, each bottom channel has a bottom opening on the bottom side and extends from the bottom opening in the direction of the midsole tip.

[0060] In some embodiments, the top channel and the bottom channel extend parallel to each other.

[0061] In some embodiments, each top channel includes a top opening that opens toward the top side. Specifically, the top opening may be a unique opening for each top channel. In some embodiments, each top channel may be entirely defined by the midsole, except for the top opening that opens only toward the top side. In certain embodiments, each top channel may not open toward the outer and inner sides of the midsole, and therefore close toward those sides.

[0062] In some embodiments, each bottom channel includes a bottom opening that opens towards the bottom side. Specifically, the bottom opening may be a unique opening for each bottom channel. In some embodiments, each bottom channel may be entirely defined by the midsole, except for the bottom opening that opens only towards the bottom side. In certain embodiments, each bottom channel may not open towards the outer and inner sides of the midsole, and therefore close towards those sides.

[0063] In some embodiments, the top channel and the bottom channel may have a prism shape, particularly an oblique prism. The prism may have a circular, elliptical, triangular, rectangular, pentagonal, or hexagonal base.

[0064] In some embodiments, the width of the top channel and the bottom channel (i.e. their lateral extension) may be less than 80%, particularly less than 60%, particularly less than 50%, particularly less than 40%, particularly less than 25% of the total width of the midsole at the longitudinal position of the corresponding top channel and bottom channel.

[0065] In some embodiments, the top channel and the bottom channel intersect each other in a centrally staggered area of ​​the midsole. It should be understood that such a centrally staggered area is arranged in a region between the top and bottom sides of the midsole. In some embodiments, the centrally staggered area typically extends longitudinally (i.e., in the longitudinal direction). The top and bottom channels that intersect each other in such a centrally staggered area typically extend primarily or entirely in the vertical direction of the midsole. This contrasts, for example, with the inner and outer channels described herein, which intersect in a centrally arranged (central = staggered) region in which the inner and outer channels typically extend primarily or entirely in the lateral direction of the midsole.

[0066] In some embodiments, the midsole includes a top layer region. The top layer region may be a first edge region of a particular type. Only a top channel extends through or is disposed within such a top layer region. In some embodiments, the midsole includes a bottom layer region. The bottom layer region may be a second edge region of a particular type. Only a bottom channel extends through or is disposed within the bottom layer region. In some embodiments, an intermediate staggered region is sandwiched between the top layer region and the bottom layer region.

[0067] In some embodiments, the midsole comprises or is composed of a polymer foam. Suitable polymer foam materials may be polyester, polyamide, polyolefin, polyurethane, or polyether block amide (PEBA).

[0068] In some embodiments, the total open area defined by the outer opening is smaller than the total closed area of ​​the outer side. In particular, the total open area defined by the outer opening is 30% to 150%, especially 40% to 100%, and even more especially 40% to 80% of the total closed area of ​​the outer side.

[0069] In some embodiments, the total open area defined by the inner opening is smaller than the total closed area of ​​the inner side. In particular, the total open area defined by the inner opening is 30% to 150%, especially 40% to 100%, and even more especially 40% to 80% of the total closed area of ​​the inner side.

[0070] In some embodiments, the bottom side of the midsole is continuously closed and / or has no channels, particularly through holes, such as vertically extending through holes.

[0071] In some embodiments, the volume of the midsole (i.e., the midsole material, such as polymer foam) is greater than the total channel volume. The total channel volume is the sum of the volumes defined by each first and second channel. The volume of the midsole material does not include the total channel volume.

[0072] In some embodiments, the midsole includes a forefoot region, a heel region, and a midfoot region disposed between the forefoot region and the heel region, and a plurality of first channels and a plurality of second channels are distributed on or disposed in the heel region, the midfoot region, and the forefoot region.

[0073] In some embodiments, the midsole is made from a single piece. Preferably, the midsole may be molded from foam, particularly injection molded foam.

[0074] In some embodiments, the sole unit includes a midsole according to any of the embodiments described herein, and also includes an outsole and / or an insole and / or a rigid plate. The outsole is typically disposed on the bottom side of the midsole. Furthermore, the rigid plate is a plate element that is more rigid than the midsole and is preferably incompressible and elastic in itself. The rigid plate may, for example, be disposed on the top side of the midsole.

[0075] In some embodiments, the shoe includes a midsole and an upper according to any of the embodiments described herein. Attached Figure Description

[0076] The invention described herein will be more fully understood from the detailed description and accompanying drawings provided below, which should not be considered as limiting the invention as described in the appended claims. In the drawings: Figure 1 A schematic top view of the midsole according to an embodiment of the present invention is shown; Figure 2 A schematic inner side view of the midsole according to another embodiment of the invention is shown; Figure 3 A schematic perspective view of the midsole according to another embodiment of the present invention is shown; Figure 4 A schematic top side view of the midsole according to another embodiment of the present invention is shown; Figure 5 A schematic cross-sectional view of a shoe with a midsole according to another embodiment of the present invention is shown. Detailed Implementation

[0077] Figure 1A schematic top view of the top side 14 of the insole 1 according to the invention is shown. The insole 1 includes a plurality of channels not directly visible from the top side 14, as the channels are completely defined by the insole 1 in a section along the longitudinal direction L and perpendicular to the transverse direction T. However, for better understanding, the channels are indicated by dashed lines. The insole 1 includes a plurality of first channels 2a, 2b, and 2c (only three of them are mentioned for clarity), which are constructed as blind holes and are inner channels in this embodiment. The first channels 2a, 2b, and 2c are characterized in that they extend from a first side (in this case, inner side 4) toward a second side (in this case, outer side 5) arranged opposite thereto, and they are open to the external environment on the inner side 4. However, as can be seen, the first channels do not extend to the second side of the insole, but have channel ends spaced apart from the second side. In addition, the insole 1 includes a plurality of another type of channel, namely second channels 3a, 3b, and 3c (again, only three of them are mentioned for clarity), which are outer channels in this embodiment. The second channels 3a, 3b, and 3c are constructed as blind holes and extend in the opposite manner to the first channels 2a, 2b, and 2c. As can be seen, the second channels 3a, 3b, and 3c extend from the second side (outer side 5 in this embodiment) in the direction of the oppositely arranged first side (inner side 4 in this embodiment) (i.e., toward the oppositely arranged first side). Furthermore, the first and second channels are offset from each other along the longitudinal direction L. Therefore, when traveling from the heel edge 7 of the midsole 1 along the longitudinal direction L to the tip 6 of the midsole, the channels do not overlap or align with each other. This allows for improved cushioning, which is evenly distributed on the midsole due to the offset, and at the same time provides stable support. Furthermore, the first and second channels are arranged completely alternately. When traveling along the longitudinal direction L starting from the heel edge 7, the outer channel is present first, then the inner channel, then the outer channel again, then the inner channel again, and so on. Therefore, the first and second channels can be arranged alternately along the longitudinal direction L. It can also be seen that the first channels 2a, 2b, and 2c, and the second channels 3a, 3b, and 3c, intersect each other in the centrally arranged staggered area 8. Both the first and second channels extend through the staggered area 8, or are arranged within it. When traveling from the heel edge 7 along the longitudinal direction L to the midsole tip 6, both the first and second channels pass through the staggered area 8. The staggered area 8 is located between the inner edge area 10 and the outer edge area 9, i.e., sandwiched between them. The boundaries of the staggered area 8, the outer edge portion 9, and the inner edge portion 10 are indicated by dotted / dashed lines.Compared to the staggered region 8 (characterized by at least one first channel and at least one second channel arranged therein), the inner edge region (which can more generally be the first edge region) is characterized by having only the inner channel (or, for the first edge region, only the first channel) arranged therein. As can be seen, when traveling along the longitudinal direction L through the inner edge region 10, only the first channel (such as 2a, 2b, and 2c) is passed through, without passing through the second channel. Conversely, the outer edge region (which can more generally be the second edge region) is characterized by having only the outer channel (or, for the second edge region, only the second channel) arranged therein. As can be seen, when traveling along the longitudinal direction L through the outer edge region 9, only the second channel (such as 3a, 3b, and 3c) is passed through, without passing through the first channel. If a runner runs with this type of midsole, effective cushioning is achieved in the centrally arranged staggered region 8 because both the first and second channels provide cushioning. The inner edge region 10 also provides some cushioning, but to a lesser extent, because only the first (i.e., inner) channel is present. Therefore, the inner edge portion (and conversely, the outer edge portion) is more stable and forms a peripheral edge that circumferentially surrounds the centrally arranged staggered region 8, which provides increased cushioning. However, the peripheral edge prevents unwanted supination or pronation, and thus prevents damage.

[0078] Figure 2 A side view of the inner side 4 of the midsole 1 according to an embodiment of the present invention is shown. Figure 1 The situation is the same as the midsole shown in the diagram. Figure 2 The midsole 1 depicted includes multiple first channels (in this case, inner channels) 2a, 2b, and 2c (again, only three are mentioned for clarity). Each inner channel is constructed as a blind hole and extends from an inner opening on the inner side (see 16a, 16b, 16c) toward the oppositely arranged outer side in the rear of the figure. The midsole 1 also includes multiple second channels (in this case, outer channels) constructed as blind holes that extend from a corresponding outer opening on the outer side of the midsole toward the inner side of the midsole. Since the second channels are not visible, they are indicated by dashed lines. It can be seen that along the longitudinal direction L, the first and second channels are offset from each other along the longitudinal direction L, and therefore, when viewed in the transverse direction T, the first and second channels do not face or contact each other. It can also be seen that along a section along the longitudinal direction L and perpendicular to the transverse direction T (pointing to the rear of the figure), the first and second channels are each completely defined by the midsole and therefore do not open toward the top side 14 or the bottom side 15.

[0079] Figure 3A perspective view of another embodiment of the midsole 1 according to the present invention is depicted. In this embodiment, the first channels 2a, 2b and 2c (again, only three of them are mentioned for clarity) are also inner channels, and the second channels 3a, 3b and 3c (again, only three of them are mentioned for clarity) are also outer channels, and... Figure 1 The situation is the same in the illustrated embodiment. The inner channels (i.e., the first channels 2a, 2b, 2c) do not extend to the outer side 5 of the midsole, and the outer channels (i.e., the second channels 3a, 3b, 3c) do not extend to the inner side 4 of the midsole. However, in this embodiment, the first and second channels are slits that not only have openings on the inner or outer side 5 of the midsole 1, but also each open towards the top side 14 of the midsole 1. It can be seen that each slit extends only partially from the top side 14 towards the bottom side 15 through the midsole 1, but not completely through it. Each slit has a slit height that extends vertically from the bottom boundary (i.e., its end) of each slit to the top side of the midsole. Furthermore, the slit width is the distance between the slit's relative channel walls in the longitudinal direction L. The slits extend obliquely to the top side 14 of the midsole 1. For example, referring to channel (or slit) 3c, it can be seen that the channel extends from its opening at the top side 14 of the midsole 1 toward the bottom side 15, but also extends in the direction of the heel edge 7. During running, the runner has a significant forward movement in the longitudinal direction L. If the runner lands on the ground, the oblique inclination of the first and second channels allows for shear deformation, causing the opposing channel wall segments to contact each other. Due to the elastic properties of the midsole, the midsole recovers to its original shape during push-off. Figure 3 As shown in its original shape, it provides forward propulsion and support for the runner.

[0080] Figure 4 The middle base 1 according to an embodiment of the present invention is shown (e.g., reference). Figure 3 A top view of the midsole (shown and discussed). In addition to certain alternating sections, the midsole 1 also includes non-alternating sections where only first channels are arranged. For example, the section between first channels 2a and 2b is such a non-alternating section because there are at least two (three in this particular embodiment) directly adjacent first-type channels, i.e., first channels, along the longitudinal direction L. In this embodiment, some aspects of the staggered regions 8 are shown. (Refer to above) Figure 1 As already described, the midsole 1 includes an interlaced region 8 in which the first and second channels intersect each other. The interlaced region 8 is arranged along the lateral direction T between the outer edge region 9 and the inner edge region 10. (As mentioned above...) Figure 1As already described, both the first and second channels extend through or are arranged within the staggered region 8. When traveling from the heel edge 7 along the longitudinal direction L to the midsole tip 6, both the first and second channels in the staggered region 8 are passed through. The staggered region 8 is arranged between the inner edge region 10 and the outer edge region 9, i.e., sandwiched between the inner edge region 10 and the outer edge region 9. The boundaries of the staggered region 8, the outer edge portion 9, and the inner edge portion 10 are indicated by dashed lines. Compared to the staggered region 8 (characterized by at least one first channel and at least one second channel arranged therein), the inner edge region (which may more generally be the first edge region) is characterized in that only the inner channel (or only the first channel for the first edge region) is arranged therein. As can be seen, when traveling along the longitudinal direction L through the inner edge region 10, only the first channel (such as 2a, 2b, and 2c) is passed through, without passing through the second channel. Conversely, the outer edge region (which in a more general sense can be called the second edge region) is characterized by having only outer channels (or, for the second edge region, only second channels) arranged therein. As can be seen, when traveling along the longitudinal direction L through the outer edge region 9, only the second channels (such as 3a, 3b, and 3c) are passed through, without passing through the first channel. It can also be seen that the staggered region 8 has a curved shape. This curved shape includes a front apex 11, which is arranged at a distance a from the midsole tip 6. The distance a can be, for example, 10% to 35% of the total length of the midsole 1 (i.e., the distance between the two parallel vertical dashed lines contacting the heel edge 7 and the midsole tip 6). Furthermore, the curved shape includes a rear apex 12, which is arranged at a distance b from the heel edge 7. The distance b can be, for example, 15% to 50% of the total length of the midsole 1. It can be seen that the curved shape extends from the rear apex 12 to the front apex 11 only in the outer to inner direction. This means that the flexural shape extends between the outer 5 and inner 4 of the midsole 1, and actually extends from the outer to the inner side. The flexural shape of the staggered area 8 also includes an inflection point 13, where the flexural shape changes from a right-handed (clockwise) curve to a left-handed (counter-clockwise) curve. The inflection point 13 is located between the rear apex 12 and the front apex 11. The staggered area with this shape follows the anatomical prerequisites of the human foot. It achieves an ideal balance between cushioning and stability, because the cushioning is positioned where it is most needed during running, while other areas (such as the inner edge portion 9 and the outer edge portion 10) provide some cushioning but also enhance stability.

[0081] Figure 5 A shoe 21 with a sole unit 20 is shown, which has a midsole 1 according to a different embodiment of the invention. In this embodiment, the first channel and the second channel are not connected as... Figures 1 to 4In the illustrated embodiment, instead of inner and outer channels, the first channels 2a, 2b, and 2c (again, only three are mentioned for clarity) are top channels, constructed as blind holes extending from the top side 14 of the midsole 1 toward the bottom side 15. It can be seen that the top channels extend obliquely. For example, top channel 2c extends along an oblique axis A, which intersects the bottom side 15 of the midsole 1 closer to the heel edge than where axis A intersects the top side 14 of the midsole 1. However, since the top channels are blind holes, they do not completely penetrate the midsole and therefore do not extend to the bottom side. Conversely, the second channels 3a, 3b, and 3c (again, only three are mentioned for clarity) are bottom channels, constructed as blind holes extending from the bottom side 15 of the midsole 1 toward the top side 14. Furthermore, in this embodiment, the first and second channels are arranged alternately and further intersect each other, forming an intermediate interlacing region 17. The intermediate staggered region 17 is sandwiched between the top layer region 18 and the bottom layer region 19, and is therefore arranged between them. The boundary between the intermediate staggered region 17, the top layer region 18, and the bottom layer region 19 is indicated by a dashed line. The top layer region can be generally considered as a first edge region of a certain type, and the bottom layer region can be considered as a second edge region of a certain type. Similarly, in this embodiment, the intermediate staggered region is characterized by at least one top channel and at least one bottom channel arranged therein. In contrast, only the top channel extends through the top layer region 18, or is arranged in the top layer region 18. Conversely, only the bottom channel extends through the bottom layer region 19, or is arranged in the bottom layer region 19. The sole unit 1 also includes a rigid plate 23 disposed directly on the top side 14 of the midsole 1 and an outsole 24 disposed directly below the bottom side 15 of the midsole 1. Furthermore, the shoe 21 includes an upper 22, which, together with the sole unit 20, provides a foot-receiving compartment for accommodating the runner's foot.

[0082] List of reference numerals 1. Midsole 2a-c First Channel 3a-c Second Channel 4. Inner side 5. Outer side 6. Midsole tip 7. Heel edge 8. Centrally arranged staggered areas 9. Outer edge area 10 Inner edge region 11. Front vertex 12 Rear Vertex 13 Turning Point 14 Top side 15 Bottom side 16a-c inner opening 17 Intersecting areas 18 Top Floor Area 19. Bottom Area 20 sole units 21 shoes 22 Shoe upper 23 Rigid Plate 24 Outsole FA forefoot area MA midfoot area HA followed by the region.

Claims

1. A midsole (1) for a shoe, said midsole (1) comprising: a. A plurality of first channels (2a, 2b, 2c) extending from a first side of the midsole (1) in a direction to a second side of the midsole (1), wherein the second side of the midsole (1) is arranged opposite to the first side of the midsole (1), wherein the first channels (2a, 2b, 2c) do not extend to the second side of the midsole (1); b. A plurality of second channels (3a, 3b, 3c) that are different from the first channel (2a, 2b, 2c), wherein the second channels (3a, 3b, 3c) extend from the second side of the midsole (1) in a direction to the first side of the midsole (1), wherein the second channels (3a, 3b, 3c) do not extend to the first side of the midsole (1); The first channel (2a, 2b, 2c) and the second channel (3a, 3b, 3c) are offset from each other.

2. The midsole according to claim 1, wherein, The first channel (2a, 2b, 2c) and the second channel (3a, 3b, 3c) are constructed as blind holes.

3. The midsole (1) according to claim 1 or 2, wherein, At least some of the first channels (2a, 2b, 2c) and the second channels (3a, 3b, 3c) are offset from each other along the longitudinal direction (L).

4. The midsole (1) according to any one of the preceding claims, wherein, The first channel (3a, 3b, 3c) and the second channel (2a, 2b, 2c) are arranged alternately.

5. The midsole (1) according to any one of the preceding claims, wherein, The first channel (2a, 2b, 2c) is an inner channel extending from the inner side (4) of the midsole (1) in a direction toward the outer side (5) of the midsole (1), wherein the inner channel does not extend to the outer side of the midsole (1); and wherein the second channel (3a, 3b, 3c) is an outer channel extending from the outer side (5) of the midsole (1) in a direction toward the inner side (4) of the midsole (1), wherein the outer channel does not extend to the inner side of the midsole (1).

6. The midsole (1) according to claim 5, wherein, The outer channel extends along the lateral direction (T) of the midsole (1) from the outer side (5) of the midsole (1) toward the inner side (4) of the midsole (1); and / or wherein, The inner channel extends along the lateral direction (T) of the midsole (1) from the inner side (4) of the midsole (1) toward the outer side (5) of the midsole (1).

7. The midsole (1) according to claim 5 or 6, wherein, The inner channel and the outer channel intersect each other in the centrally located staggered area (8) of the midsole (1).

8. The midsole (1) according to any one of claims 7, wherein, The midsole (1) includes an outer edge region (9) disposed between the outer side (5) of the midsole (1) and the staggered region (8) of the midsole (1), wherein only the outer channel extends through the outer edge region (9).

9. The midsole (1) according to any one of claims 7 or 8, wherein, The midsole (1) includes an inner edge region (10) disposed between the inner side (4) of the midsole (1) and the staggered region (8) of the midsole (1), wherein only the inner channel extends through the inner edge region (10).

10. The midsole (1) according to any one of claims 7 to 9, wherein, The interlacing region (8) follows the major joints of the human foot.

11. The midsole (1) according to any one of claims 7 to 10, wherein, The interlaced region (8) has a curved shape, particularly a curved shape that curves over 80% to 100% of its length.

12. The midsole (1) according to claim 11, wherein, The curved shape includes a front vertex (11) and a rear vertex (12).

13. The midsole (1) according to claim 12, wherein, The curved shape extends in the outer to inner direction between the rear vertex (11) and the front vertex (12).

14. The midsole (1) according to claim 12 or 13, wherein, The front apex (11) is located at a distance of 10% to 35% of the total length of the midsole from the midsole tip (6).

15. The midsole (1) according to any one of claims 12 to 14, wherein, The rear apex (12) is located at a distance of 15% to 50% of the total length of the midsole (1) from the heel edge (7) of the midsole (1).

16. The midsole (1) according to any one of claims 12 to 15, wherein, The curved shape includes an inflection point (13) between the front vertex (11) and the rear vertex (12), wherein the inflection point (13) is located at 45% to 65% of the total length of the midsole (1) from the heel edge (7) of the midsole (1).

17. The midsole (1) according to any one of claims 5 to 16, wherein, The outer channel and / or the inner channel are slits that open toward the top side of the midsole (1).

18. The midsole (1) according to claim 17, wherein, The slit extends only partially from the top side (14) of the midsole (1) toward the bottom side (15) of the midsole (1).

19. The midsole (1) according to claim 17 or 18, wherein, The slit extends obliquely toward the heel edge (7) from the top side (14) of the midsole (1) toward the bottom side (15) of the midsole (1).

20. The midsole (1) according to any one of claims 5 to 19, wherein, The outer channel and / or the inner channel are completely defined by the midsole (1) in a cross section along the longitudinal direction (L) of the midsole and perpendicular to the transverse direction (T) of the midsole.

21. The midsole according to any one of claims 6 to 20, wherein, The inner channel includes an inner opening (16a, 16b, 16c) on the inner side (4) of the midsole (1), and the outer channel includes an outer opening on the outer side (5) of the midsole (1).

22. The midsole (1) according to claim 21, wherein, The midsole (1) is configured such that the inner openings (16a, 16b, 16c) and / or the outer openings are deformed horizontally and / or vertically, particularly sheared, by the forces generated during running, so that they are completely closed.

23. The midsole (1) according to any one of claims 1 to 4, wherein, The first channel (2a, 2b, 2c) is a top channel constructed as a blind hole and extending from the top side (14) of the midsole (1) toward the bottom side (15) of the midsole (1); and wherein the second channel (3a, 43b, 3c) is a bottom channel constructed as a blind hole and extending from the bottom side (15) of the midsole (1) toward the top side (14) of the midsole (1).

24. The midsole (1) according to claim 23, wherein, The top channel extends vertically (V) and particularly obliquely from the top side (14) of the midsole (1) toward the bottom side (15) of the midsole (1); and / or wherein, The bottom channel extends vertically (V) and particularly obliquely from the bottom side (15) of the midsole (1) toward the top side (14) of the midsole (1).

25. The midsole (1) according to claim 23 or 24, wherein, The top channel and the bottom channel intersect each other in the middle interlacing area (17) of the midsole (1).

26. The midsole (1) according to claim 25, wherein, The midsole (1) includes a top region (18) and a bottom region (19), wherein the intermediate staggered region (17) is sandwiched between the top region (18) and the bottom region (19), wherein only the top channel extends through the top region (18) and / or only the bottom channel extends through the bottom region (19).

27. The midsole (1) according to any one of the preceding claims, wherein, The midsole (1) comprises or is composed of polymer foam.

28. The midsole (1) according to any one of the preceding claims, wherein, The midsole (1) includes a forefoot region, a heel region, and a midfoot region disposed between the forefoot region and the heel region, wherein the plurality of first channels (2a, 2b, 2c) and the plurality of second channels (3a, 3b, 3c) are distributed on the heel region, the midfoot region, and the forefoot region.

29. A sole unit (20) comprising a midsole (1) according to any of the preceding claims.

30. A shoe (21) comprising a midsole (1) according to any one of claims 1 to 28.

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