Running shoe soles

Abstract

The invention discloses a sole for a running shoe having a midsole (1), wherein the midsole (1) has a soft elastic top layer (2) and a soft elastic bottom layer (3), between which a flexurally elastic incompressible plate (4) is arranged in the vertical direction (V), and the bottom layer (3) has a plurality of channels (31a, 31b, 31c) extending in the transverse direction (Q), wherein the channels (31a, 31b, 31c) of the bottom layer (3) can be deformed vertically (V) and / or horizontally in the longitudinal direction (L) under the action of forces acting vertically (V) and / or in the longitudinal direction (L) generated during running.

Description

Technical Field

[0001] The invention relates to the field of footwear technology, in particular sports and leisure footwear, and to a sole for a running shoe. Background Art

[0002] A large number of running shoes with different cushioning systems are known in the prior art. Sports and leisure shoes with soles with a gel core in the heel area are widely used, which ensures vertical cushioning during pedaling. In addition, an improvement in the vertical cushioning properties is achieved by providing a separate spring element in the heel area between the outsole and the insole.

[0003] Although the above-mentioned soles improve the vertical cushioning performance of the shoe, they still cannot satisfactorily cushion the forces acting horizontally on the sole and the shoe. Forces with large horizontal components are additionally increased, especially when running off the route, and due to the lack of sufficient cushioning, such forces are one of the main causes of frequent knee and hip pain.

[0004] A shoe sole is known from WO 2016 184 920 of the applicant, which has a downwardly protruding, laterally open, segmented and grooved sole. Under the action of the forces generated during running, the groove-shaped elements are deformable both vertically and horizontally until their lateral openings are closed. The segmentation of the sole also segments the cushioning effect, thereby forming uncushioned or less cushioned areas in the sole. Summary of the invention

[0005] In many sports activities, such as running, the initial contact of the shoe with the ground occurs in the heel region. Therefore, the forces acting on the shoe in this region are significantly greater than in the forefoot region or the midfoot region of the sole. Taking this into account, running shoes usually have particularly pronounced cushioning in the heel region. Although such a design allows at least sufficient vertical cushioning to be provided, the pronounced cushioning has a negative impact on the overall weight of the shoe. Therefore, the running shoes known in the prior art usually have an unsatisfactory cushioning effect and / or a high weight.

[0006] Furthermore, using known cushioning systems, a satisfactory cushioning effect can be ensured, but due to soft components such as gel cores or soft elastic foams, such cushioning systems result in energy losses during the runner's rolling and push-off processes. As a result, additional energy must be expended with each step to propel the runner, which can cause the runner to tire more quickly. This effect is enhanced as the softness of the midsole increases. Therefore, one problem of the prior art is how to find a compromise between the softness of the midsole for increasing the cushioning effect during stepping and the stiffness of the midsole for avoiding energy losses during push-off.

[0007] It is therefore a general object of the present invention to improve upon the prior art in the field of running shoe soles and preferably to overcome one or more disadvantages of the prior art.

[0008] In some embodiments, a sole is provided which, on the one hand, achieves a satisfactory cushioning effect (particularly in the horizontal and vertical directions), while at the same time reducing energy losses during the push-off process and preferably providing additional energy for the push-off process.

[0009] In some embodiments, a sole having a low weight is provided.

[0010] According to a first aspect of the invention, the general problem is solved by a sole for a running shoe with a midsole, wherein the midsole comprises a soft elastic top layer and a soft elastic bottom layer. In addition, a flexurally elastic, incompressible plate is arranged in the vertical direction between the top layer and the bottom layer. The bottom layer comprises a plurality of channels extending in the transverse direction of the midsole, which can be deformed vertically and / or horizontally in the longitudinal direction under the action of forces generated during running, which act vertically and / or in the longitudinal direction. Preferably, the channels of the bottom layer of the midsole - under the action of forces generated during running, which act vertically and / or in the longitudinal direction - can be deformed vertically and / or horizontally in the longitudinal direction until they are closed.

[0011] The structure of the midsole is layered and, in some embodiments, can be described as a sandwich structure. Viewed from the bottom surface of the sole or from the ground, the bottom layer is first provided, then the flexurally elastic incompressible plate is provided, and then the top layer is provided. Therefore, the incompressible plate is arranged between the top layer and the bottom layer in the vertical direction, which makes the plate in the sole easier to bend during the rolling process, or has a lower bending moment, compared with the arrangement above the midsole, because the movement and the force emitted from the runner's foot are more effectively transmitted to the flexurally elastic incompressible plate through the top layer. The channel further enhances this effect, because the midsole is made more flexible and easier to bend by the channel. Therefore, the plate is tightened during the rolling process and, due to its flexurally elastic incompressible characteristics, provides a restoring force that provides additional energy for the push-off process. At the same time, the channel provided in the bottom layer can achieve an efficient and satisfactory cushioning effect.

[0012] Directional indications as used in the present disclosure are to be understood as follows: the longitudinal direction L of the sole is described by the axis from the heel area to the forefoot area, and therefore extends on the longitudinal axis of the sole. The transverse direction Q of the sole extends transversely to the longitudinal axis and is substantially parallel to the bottom surface of the sole, or substantially parallel to the ground. Therefore, the transverse direction extends along the transverse axis of the midsole. In the context of the present invention, the vertical direction V refers to the direction from the bottom surface of the sole toward the insole, or refers to the direction toward the wearer's foot in the use state, and therefore extends on the vertical axis of the midsole. The medial side of the midsole of a pair of running shoes refers to the following outer area along the longitudinal axis in the midsole, which is facing the second running shoe in the pair of running shoes in the wearing state. Correspondingly, the lateral side of the midsole of a pair of running shoes refers to the following outer area along the longitudinal axis in the midsole, which - when a pair of running shoes is in the wearing state - faces away from the second running shoe and is therefore arranged opposite to the medial side. In addition, the lateral area of ​​the midsole refers to the area along the medial and lateral sides of the midsole of a running shoe in a pair of running shoes, wherein the area extends in the direction of the longitudinal axis of the midsole. Typically, the horizontal range of the lateral area is several centimeters, such as 0.1 to 5 cm, preferably 0.5 to 3 cm. The middle area of ​​the midsole refers to the area at the center of the midsole along the longitudinal axis, which area extends in the transverse direction of the midsole accordingly. Typically, the horizontal range of the middle area is several centimeters, such as 0.1 to 5 cm, preferably 0.5 to 3 cm.

[0013] The soft elastic material for sole is well known to those skilled in the art. For example, Young's modulus (Young Modul) can be used to be about 0.0001 to 0.2GPa, especially 0.001 to 0.1GPa material, which can be considered as the soft elastic material for the purpose of the present invention. Usually, this material can include polymer foam. The soft elastic material can include: polyurethane (particularly thermoplastic polyurethane (TPU) or expanded thermoplastic polyurethane (eTPU)), polyamide (for example PA-11, PA-12, nylon), polyethylene terephthalate (PET) or polybutylene terephthalate (PBT), or their mixture.

[0014] The forces generated during running usually originate from the gravitational force generated by the wearer's weight, which may be, for example, between 40 and 120 kg, in particular between 50 and 100 kg.

[0015] For the purposes of the present invention, a channel is understood to be a generally tubular recess. Generally speaking, a channel is defined in whole or in part by a channel wall. A channel is generally empty. In particular, a channel can be open and run through, i.e., the channel is preferably not a blind hole. In a preferred embodiment, the channels of the bottom layer can be substantially parallel to each other. In certain embodiments, the total share of the open area of ​​the midsole, i.e., the total share of the lateral areas of the channel opening, can be less than the total share of the closed area of ​​the midsole, i.e., the total share of the outer area of ​​the midsole without a channel.

[0016] It is clear to the person skilled in the art that the deformability of the channel can include, for example, a vertical joining of the channel walls and / or a shearing of the channel in the longitudinal direction. Typically, the upper channel wall and the lower channel wall can come into contact with each other under the effect of the forces generated during running, so that the corresponding channel deforms until it closes laterally. The channel walls can be formed by a soft elastic top or bottom layer and / or by a flexurally elastic, incompressible plate.

[0017] The flexurally elastic, incompressible sheets can be made of rigid polymers, such as LDPE, HDPE, polypropylene, polyether block amides (PEBA, e.g. ), etc., and / or carbon fibers or mixtures thereof. Preferably, the flexurally elastic incompressible plate is therefore made of a material different from the top and bottom layers. Thus, the flexurally elastic plate in the sense of the invention may have a Young's modulus of 5 to 20 GPa, in particular 10 to 15 GPa, preferably 13 to 15 GPa. The flexurally elastic incompressible plate may generally have a thickness (i.e. extension in the vertical direction) of up to 5 mm, in particular 1 to 5 mm, preferably 1 to 3 mm.

[0018] In some embodiments, the thickness of the top layer in the vertical direction may be 0.3 to 2 cm.

[0019] In some embodiments, the top layer may have a plurality of channels extending in the transverse direction. By means of these channels, on the one hand, the cushioning effect of the midsole is additionally increased, and on the other hand, the top layer is made more flexible, whereby the flexurally elastic incompressible plate is more easily bent, thereby facilitating the rolling process. In addition, the energy of push-off is increased, because during the rolling process, the recovery of the bent plate is improved during the push-off. In a preferred embodiment, the channels of the top layer may extend substantially parallel to each other. Typically, the channels of the bottom layer and the top layer are formed so that during running, viewed in the longitudinal direction, the channels of the bottom layer collapse first, and then only the corresponding channels of the top layer collapse. Typically, the channels of the top layer can be deformed vertically and / or horizontally in the longitudinal direction under the action of forces generated during running, acting vertically and / or acting in the longitudinal direction. Preferably, the channels of the top layer can be deformed vertically and / or horizontally in the longitudinal direction under the action of forces generated during running, acting vertically and / or acting in the longitudinal direction, until they are closed.

[0020] In other embodiments, the channels of the top layer can be arranged longitudinally offset horizontally from the channels of the bottom layer. This has the advantage that the damping element can be arranged so that it is distributed over at least the entire midfoot area and the heel area without having to oversize the channels, which would otherwise make the sole unstable. Separating the top layer from the bottom layer by a flexurally elastic, incompressible plate avoids instabilities, in particular floating effects.

[0021] In some embodiments, the channels of the top layer may be horizontally offset in the longitudinal direction relative to the channels of the bottom layer, so that the channels of the top layer and the bottom layer do not overlap in the vertical direction. Thus, in such an embodiment, preferably no channels are arranged in the top layer above the channels in the bottom layer, and no channels are arranged in the bottom layer below the channels in the top layer, whereby the cushioning effect is additionally improved, since the cushioning is non-segmented and is achieved in almost all relevant areas of the midsole. In addition, the flexibility of the midsole during the rolling movement is increased, since the channel walls of the top layer are narrowed during the rolling movement, or the channels are closed, thereby facilitating the bending of the flexurally elastic, incompressible plate.

[0022] Typically, at least some or all of the channels in the top layer may deform vertically and / or horizontally in the longitudinal direction until they close under the influence of vertically acting and / or longitudinally acting forces generated during running.

[0023] In some embodiments, the channels of the top layer and / or bottom layer have side openings in the side regions of the midsole. Preferably, the channels can deform vertically and / or horizontally in the longitudinal direction under the effect of forces acting vertically and / or in the longitudinal direction generated during running until the side openings are closed.

[0024] In other embodiments, the channels in the top layer and / or bottom layer are arranged at least in the heel region and in the midfoot region. In some embodiments, the channels in the top layer and / or bottom layer are arranged in the heel region, in the midfoot region and in the forefoot region. In particular, the channels can be arranged longitudinally in the top layer and / or bottom layer, from the heel of the wearer to the metatarsophalangeal joint.

[0025] In certain embodiments, the channel of bottom layer is formed completely or partially by the groove-shaped element of horizontal orientation that protrudes downward relative to ground.In this case, only a part of channel, particularly most of channel, even all channels of bottom layer can be formed by groove-shaped element in bottom layer.The advantage that such element has is that they are deformable and closable, are horizontally deformable and horizontally closable in longitudinal direction in particular, and therefore provide good horizontal buffering, which has joint protection effect especially on descending path.The cross section of groove-shaped element can be U-shaped.Preferably, groove-shaped element has recesses between each other, and this recess is configured to make midsole more flexible and conducive to rolling motion by reducing the bending moment of the incompressible plate of bending elasticity in sole.Preferably, groove-shaped element can be arranged so that at least one recess is arranged below the channel of top layer, thereby is conducive to the bending of plate and is therefore conducive to rolling motion.The recesses between groove-shaped elements can define the predetermined bending point (Sollbiegestellen) of midsole.

[0026] In some embodiments, the channel of the top layer is defined by a soft elastic top layer and a bending elastic incompressible plate. Additionally or alternatively, the channel of the bottom layer is defined by a soft elastic bottom layer and a bending elastic incompressible plate. In this way, the surface of the bending elastic incompressible plate is at least partially open, or directly exposed to the environment and is therefore only partially covered by the top layer and / or the bottom layer. Therefore, the channel partially defined by the plate is conducive to the bending of the plate during the rolling movement, because the compressive stress and tensile stress on the plate are significantly reduced by the partial exposure of the plate (caused by the channel). On the one hand, this can achieve more effective energy transfer during push-off, and on the other hand, a harder plate can be used compared to the case without such a channel. If there is no such channel, a relatively hard plate will cause the plate to be unable to bend easily during normal running movements, which will significantly reduce running comfort. However, the advantage of using a harder plate is that the energy provided for push-off is correspondingly higher. In addition, such a structure allows the overall thickness of the midsole to be smaller, which significantly reduces its weight. In particular, 10% to 30%, in particular 20% to 30%, preferably 25% to 30% of the surface of the flexurally elastic incompressible plate can be exposed through the channels in the top layer delimited by the flexurally elastic incompressible plate. Additionally or alternatively, (another) 10% to 35%, in particular 20% to 35%, preferably 25% to 35% of the surface of the flexurally elastic incompressible plate can be exposed through the channels in the bottom layer. This significantly reduces the bending moment of the plate in the sole and enables efficient energy transfer.

[0027] In other embodiments, the flexurally resilient incompressible plate extends substantially completely from the medial side of the midsole to the lateral side. In such embodiments, the incompressible plate may be directly exposed to the environment at the medial side and / or the lateral side and may therefore be visible. Thus, the plate may completely separate the top layer and the bottom layer from each other. Basically, "completely" is to be understood as meaning that the plate extends over at least 90% of the area of ​​the top layer, preferably at least 95% of the area, preferably at least 98% of the area.

[0028] In some embodiments, the channels of the bottom layer and / or the channels of the top layer are elongated in cross-section in the longitudinal direction of the midsole. Therefore, the height of the channel (extending in the vertical direction) is smaller than the width of the channel (extending in the longitudinal direction), resulting in a smaller overall thickness of the midsole, thereby reducing the weight of the sole.

[0029] In other embodiments, the midsole comprises a groove extending longitudinally from the heel region to at least in the midfoot region. Thus, the groove is located in the middle region of the sole. On the one hand, the groove can reduce the weight of the sole, while on the other hand, due to its intermediate position, it does not lead to a significant reduction in the cushioning effect. In some embodiments, the channel can extend directly perpendicular to the flexurally elastic incompressible plate, so that it can be partially directly exposed to the environment in the region of the groove and is therefore visible from the bottom surface of the sole. Since no additional sole material is arranged in the region of the groove, the groove also facilitates the bending of the plate during running by reducing the bending moment of the plate in the sole, which makes the rolling process more comfortable and correspondingly increases the support during push-off. The groove is particularly preferably substantially V-shaped, so that the side walls (flank) of the groove are inclined. This prevents stones and wood from getting stuck. The channel in the transverse direction of the bottom layer can preferably be opened towards the groove.

[0030] Embodiments in which the grooves extend from the heel region to the midfoot region have proven to be particularly advantageous. The grooves allow for a better deformability of the channel, which is particularly advantageous for thicker wall thicknesses, such as are preferably provided in the heel and midfoot regions. In contrast, a significantly weaker cushioning effect is usually required in the forefoot region, which is why the channel walls in this region are thinner and therefore more easily deformable than the channels in the heel and midfoot regions.

[0031] Preferably, the groove extends to the heel edge. Thus, the soft elastic midsole in the heel area is divided into two. The two parts can be slightly moved apart from each other in the lateral direction during landing, thereby additionally increasing the cushioning effect.

[0032] In some embodiments, the height of the channels in the bottom layer in the vertical direction is 0.1 to 2.0 cm, preferably 0.2 to 1.0 cm, and the height of the channels in the top layer in the vertical direction is 0.1 to 1.0 cm, preferably 0.2 to 0.5 cm. The height thus defines the distance between the walls of each channel in the vertical direction.

[0033] In other embodiments, the bottom layer is fixed to the flexurally elastic incompressible plate. For example, the bottom layer can be bonded or welded thereto. The flexurally elastic incompressible plate can also be fixed to the top layer by bonding or welding.

[0034] In some embodiments, at least one channel in the bottom layer, preferably all channels in the heel area and the forefoot area, can have a front wall in the area of ​​the flexurally elastic incompressible plate, which has a step. The front wall usually refers to the wall of the channel that forms the front boundary of the channel in the longitudinal direction (i.e. in the running direction). Correspondingly, the rear wall of the channel refers to the wall that forms the rear boundary of the channel in the longitudinal direction and is therefore located closer to the heel edge of the running shoe. The step can be a first area of ​​the front wall, which directly adjoins the flexurally elastic incompressible plate and has a greater slope than the second area of ​​the front wall adjoining it. For example, the first area can be formed to be substantially perpendicular to the flexurally elastic incompressible plate, for example, at an angle of 80 to 90 °. The second area of ​​the front wall adjoining it can form an angle of 35 to 60 ° with the flexurally elastic incompressible plate. The step in the front wall helps horizontal shearing, and thus helps the closure of the channel to effectively absorb horizontal forces.

[0035] In other embodiments, at least one channel of the base layer (preferably all channels in the heel region and in the midfoot region) can have a front wall and a rear wall, wherein the front wall is arranged at an angle to the flexurally elastic incompressible plate that is smaller than the angle that the rear wall of the channel makes with the flexurally elastic incompressible plate. This facilitates horizontal shearing and thus closure of the channel, which improves the damping of horizontally acting forces.

[0036] In some embodiments, the midsole is bent upward in the forefoot region in the vertical direction. In particular, the forefoot region can be bent upward at an angle of 25 to 35° in the vertical direction. Since the flexurally elastic incompressible plate also bends upward in the same way, a rolling motion is facilitated, i.e. the runner reaches a push-off position with less force loss, in which only the forefoot region is in contact with the ground. This reduces energy loss and fatigue of the runner.

[0037] In other embodiments, the heel area of ​​the midsole may rise vertically toward the heel edge, thereby improving the runner's initial contact with the ground and supporting the rolling motion, so that the runner requires less energy.

[0038] In other embodiments, the rearmost channel of the midsole in the longitudinal direction (i.e. the channel closest to the heel edge of the midsole) is arranged to be directly under the heel of the wearer when worn. This ensures the greatest possible cushioning during initial contact with the ground. For example, the channel may be spaced 2 to 3.5 cm from the heel edge (i.e. the rearmost edge of the midsole) in the longitudinal direction.

[0039] In some embodiments, the sole may include an outsole, which is attached to the midsole, in particular directly to the bottom layer. In this regard, the outsole may have anti-slip properties. In particular, the outsole may be structured. The structure may have regular or irregular grooves and / or grooves.

[0040] Preferably, the outsole can have a cross structure. This ensures particularly good ground adhesion. Usually, the outsole is made of a different material than the midsole. In particular, the outsole can be made of a wear-resistant material such as TPU, polypropylene or other suitable materials.

[0041] The outsole can preferably be arranged only on a part of the midsole, so that a part of the midsole is free of the outsole. In this case, it has proven to be particularly advantageous to provide a structured outsole in the lateral areas outside the side of the midsole (especially in the heel area, the midfoot area and the forefoot area), because due to anatomical conditions, landing and push-off mainly occur in the lateral areas on the lateral side. In contrast, at least a part of the midsole in the lateral area on the inside of the side of the midsole (preferably in the midfoot area) can be free of the outsole. This can significantly save manufacturing time and costs without reducing the anti-slip properties of the sole. In the forefoot area of ​​the midsole, there is usually also an outsole.

[0042] In some embodiments, such a structure of the outsole is formed so as to provide a structure with sharper edges and / or a structure with more defined lines in the lateral lateral area than in the lateral medial area of ​​the outsole.

[0043] In some embodiments, the bottom layer and the top layer may not be directly connected to each other. In addition, the top layer may be completely separated from the bottom layer by a flexurally elastic incompressible plate.

[0044] Typically, the top layer and bottom layer are manufactured separately and are therefore not integral. In some embodiments, the midsole may include at least two separate sole components, namely a top layer and a bottom layer.

[0045] Another aspect of the invention relates to a running shoe comprising a sole according to any of the embodiments described herein.

[0046] Another aspect of the invention relates to the use of a sole according to one of the embodiments described herein for the manufacture of running shoes.For example, an upper can be attached to the sole according to the invention, in particular sewn and / or glued thereto. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Various aspects of the invention are explained in more detail with reference to the embodiments shown in the following figures and accompanying description.

[0048] Figure 1shows a schematic side view of a sole according to the invention for a running shoe according to one embodiment of the invention;

[0049] Figure 2 A view showing the bottom surface of a sole according to the invention for a running shoe according to another embodiment of the invention;

[0050] Figure 3 The sole of the present invention for running shoes according to another embodiment of the present invention is shown in the lateral direction (along the Figure 2 AA) is a schematic cross-sectional view;

[0051] Figure 4 Shows Figure 1 A cross-sectional view of the channel of the sole shown in . DETAILED DESCRIPTION

[0052] Figure 1 The embodiment of the running shoe sole shown comprises a midsole 1 having a soft elastic top layer 2 and a soft elastic bottom layer 3. A flexurally elastic incompressible plate 4 is arranged between the top layer 2 and the bottom layer 3 in the vertical direction V. This results in a sandwich structure which, when viewed from the ground B, comprises the bottom layer 3 as a first layer, then the flexurally elastic incompressible plate 4 and finally the top layer 2. The flexurally elastic incompressible plate 4 thus generally forms an intermediate layer arranged between the top layer and the bottom layer. The flexurally elastic incompressible plate 4 extends substantially completely from the inside of the midsole 1 to the outside and is therefore also visible from the outside. The plate thus separates the top layer 2 substantially completely from the bottom layer. The bottom layer 3 comprises a plurality of channels 31a, 31b, 31c extending in the transverse direction Q (other channels are not shown for the sake of clarity) which can deform vertically (in the vertical direction) and / or horizontally in the longitudinal direction L until closed under the action of forces generated during running and acting vertically (in the vertical direction V) and / or acting horizontally in the longitudinal direction L. Furthermore, in the illustrated embodiment, the top layer 2 further comprises a plurality of channels 21a, 21b, 21c extending in the transverse direction Q (other channels are not shown for the sake of clarity), wherein at least a portion of the channels of the top layer 2 can be deformed vertically (in the vertical direction V) and / or horizontally in the longitudinal direction L until closed under the action of forces acting vertically (in the vertical direction) and / or in the longitudinal direction L generated during running. Figure 1As shown, the passage 21a, 21b, 21c of the top layer 2 is arranged horizontally offset in the longitudinal direction L with respect to the passage 31a, 31b, 31c of the bottom layer 3, that is, the passage of the top layer is not overlapped with the passage of the bottom layer in the vertical direction V. In other words, in the vertical direction V, the passage of the top layer is not located on the passage of the bottom layer. In the illustrated embodiment, the passage 31b, 31c of the bottom layer 3 is formed by groove elements 32a and 32b. In the cross section, groove elements 32a, 32b, 32c are U-shaped basically. In passage 31b and 31c, the angle formed by the incompressible plate 4 of bending elasticity and the front wall of the corresponding passage is less than the angle formed by the incompressible plate of bending elasticity and the rear wall of the corresponding passage. Groove elements 32a and 32b have a recess 33a therebetween, and this recess 33a is configured to make the midsole more flexibly used for rolling motion. Here, the recess 33a is arranged below the channel 21c of the top layer 2 in the vertical direction V, which additionally facilitates the rolling movement and bending of the flexurally elastic, incompressible plate, since the recess 33a defines a predetermined bending point and the channel 21c is closed or closable when the plate 4 is bent in the vertical direction and / or in the longitudinal direction. Figure 1 In the illustrated embodiment, the channels in the top layer 2 and the bottom layer 3 are bounded by the flexurally elastic incompressible plates 4, so that the plates are partially exposed. The channels 21a, 21b and 21c in the top layer are bounded in the vertical direction by the plates 4 at their respective bottom sides, and the channels 31a, 31b and 31c are bounded in the vertical direction by the plates 4 at their respective top sides. Thus, generally speaking, at least a portion of the channel walls of the channels in the top layer 2 and / or the channels in the bottom layer 3 are formed by the flexurally elastic incompressible plates 4. Figure 1 As shown in the side view of FIG. 1 , the channels 21a, 21b and 21c of the top layer 2 and the channels 31a, 31b, 31c of the bottom layer are elongated, i.e. the channel walls are at a greater distance from one another in the longitudinal direction L than in the vertical direction V. The midsole 1 is curved upwards in the forefoot region at an angle of 25 to 35° relative to the ground surface B in the vertical direction V. In addition, the heel portion of the midsole is raised in the vertical direction V. The channel 31a, which is the channel of the bottom layer 3 closest to the heel edge 5, is arranged so that when worn, it is located directly under the heel of the wearer.

[0053] exist Figure 2, the bottom surface of the midsole 1 facing the ground in the worn state is shown, which has a heel area FB, a midfoot area MFB and a forefoot area VFB. A groove 6 facing the ground and open to the ground extends from the heel area FB to the midfoot area MFB. An outsole 7 is arranged on a part of the midsole 1 or on the bottom layer 3. It can be seen that in the midfoot area, in the side area on the inside of the side of the midsole, the midsole is not attached to the outsole. The outsole 7 has a structured design. In the embodiment shown, the structuring is designed as a cross structure. In this case, a structure with sharper edges and a structure with clearer lines is provided in the side area on the outside of the side compared to the side area on the inside of the side of the sole.

[0054] Figure 3 A channel 31b extending in the transverse direction Q is shown (see Figure 2 AA in FIG. 1 ), in a cross section in the transverse direction Q. The groove 6 is substantially V-shaped and the channel 31 b in the bottom layer 3 opens towards the groove 6. The sandwich structure of the bottom layer 3, the flexurally elastic incompressible plate 4 and the top layer 2 is also visible. The flexurally elastic incompressible plate 4 is arranged between the top layer and the bottom layer of the midsole 1 in the vertical direction V. The dotted line indicates a channel 21 c of the top layer 2 which is not visible in the cross section.

[0055] Figure 4 An enlarged cross section of a channel 31b of the bottom layer 3 is shown. The channel 31b comprises a rear wall 311 and a front wall 312. The front wall 312 of the channel 31b comprises a step 313 which divides the front wall into a first area and a second area. The first area directly adjoining the flexurally elastic, incompressible plate 4 is substantially perpendicular to the plate 4. The second area of ​​the front wall 312 adjoining the first area at the step 313 is arranged at a smaller angle to the flexurally elastic, incompressible plate 4 than the first area.

Claims

1. A sole for a running shoe having a midsole (1), characterized in that The midsole (1) comprises a soft elastic top layer (2) and a soft elastic bottom layer (3), wherein a flexurally elastic incompressible plate (4) is arranged between the top layer (2) and the bottom layer (3) in the vertical direction (V), and wherein the bottom layer (3) comprises a plurality of channels (31a, 31b, 31c) extending in the transverse direction (Q), wherein the channels (31a, 31b, 31c) of the bottom layer (3) are delimited by the soft elastic bottom layer (3) and by the flexurally elastic incompressible plate (4) and are arranged in the heel region, the midfoot region and the forefoot region, wherein the flexurally elastic incompressible plate (4) is arranged in the heel region, the midfoot region and the forefoot region. 10% to 35% of the surface of the plate (4) can be exposed through the channels (31a, 31b, 31c) of the bottom layer (3), wherein the channels (31a, 31b, 31c) of the bottom layer (3) can deform vertically (V) and / or horizontally in the longitudinal direction (L) under the action of forces acting vertically (V) and / or in the longitudinal direction (L) generated during running, wherein the midsole (1) includes a groove (6) extending in the longitudinal direction (L) from the heel area at least to the midfoot area, the groove (6) also extending to the heel edge, and wherein the channel is open and continuous.

2. The sole according to claim 1, characterized in that The top layer (2) comprises a plurality of channels (21a, 21b, 21c) extending in a transverse direction (Q).

3. The sole according to claim 2, characterized in that The channels (21a, 21b, 21c) of the top layer (2) are arranged with a horizontal offset in the longitudinal direction (L) relative to the channels (31a, 31b, 31c) of the bottom layer (3).

4. The sole according to claim 3, characterized in that The channels (21a, 21b, 21c) of the top layer (2) are arranged with a horizontal offset in the longitudinal direction (L) relative to the channels (31a, 31b, 31c) of the bottom layer (3), so that the channels (21a, 21b, 21c) of the top layer (2) and the channels (31a, 31b, 31c) of the bottom layer (3) do not overlap in the vertical direction (V).

5. The sole according to claim 2, characterized in that: The channels (21a, 21b, 21c) of the top layer (2) can be deformed vertically (V) and / or horizontally in the longitudinal direction (L) until they are closed under the action of forces acting vertically (V) and / or in the longitudinal direction (L) generated during running.

6. The sole according to claim 3, characterized in that: The channels (21a, 21b, 21c) of the top layer (2) can be deformed vertically (V) and / or horizontally in the longitudinal direction (L) until they are closed under the action of forces acting vertically (V) and / or in the longitudinal direction (L) generated during running.

7. The sole according to claim 4, characterized in that The channels (21a, 21b, 21c) of the top layer (2) can be deformed vertically (V) and / or horizontally in the longitudinal direction (L) until they are closed under the action of forces acting vertically (V) and / or in the longitudinal direction (L) generated during running.

8. The sole according to any one of claims 1 to 7, characterized in that The channels (31a, 31b, 31c) of the bottom layer (3) are formed by channel-shaped elements (32a, 32b, 32c) oriented in the transverse direction (Q) and projecting downwards to the ground (B).

9. The sole according to any one of claims 1 to 7, characterized in that The channels (21a, 21b, 21c) of the top layer (2) are delimited by the soft elastic top layer (2) and the flexurally elastic incompressible plate (4), and / or wherein: The channels (31a, 31b, 31c) of the base layer (3) are delimited by the soft elastic base layer (3) and the flexurally elastic, incompressible plate (4).

10. The shoe sole according to any one of claims 1 to 7, characterized in that The flexurally elastic, incompressible plate (4) extends completely from the inner side to the outer side of the midsole (1).

11. The sole according to any one of claims 1 to 7, characterized in that The channels (31a, 31b, 31c) of the bottom layer (3) and / or the channels (21a, 21b, 21c) of the top layer (2) are elongated in cross section in the longitudinal direction (L) of the midsole (1).

12. The sole according to any one of claims 1 to 7, characterized in that The height of the channels (31a, 31b, 31c) of the bottom layer (3) in the vertical direction (V) is 0.2 to 1.0 cm, and the height of the channels (21a, 21b, 21c) of the top layer (2) in the vertical direction (V) is 0.2 to 0.5 cm.

13. The sole according to any one of claims 1 to 7, characterized in that The bottom layer (3) is fixed to the flexurally elastic, incompressible plate (4).

14. The shoe sole according to claim 13, characterized in that The bottom layer (3) is glued to the flexurally elastic, incompressible plate (4).

15. The sole according to any one of claims 1 to 7, characterized in that At least one channel in the bottom layer has a front wall with a step in the region of the flexurally elastic, incompressible plate.

16. The sole according to any one of claims 1 to 7, characterized in that At least one channel in the bottom layer comprises an angle between a front wall of the channel and the flexurally resilient incompressible plate that is smaller than an angle between a rear wall of the channel and the flexurally resilient incompressible plate.

17. A running shoe comprising the sole according to any one of claims 1 to 16.

18. Use of the sole according to any one of claims 1 to 16 in the manufacture of running shoes.

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