EP2361520A1 - Shoe sole with air circulation - Google Patents

Abstract

The shoe sole (12) has a middle sole body (10) with an air inlet opening and an air outlet opening connected with each other in flow conductive manner. A cavity (30) is formed in the body and connected with the openings. Teeth-like support elements (36, 36', 36'', 36''') are provided in the cavity, and a reinforcing element (22) is supported in the support elements for covering the cavity. The support elements are arranged in the cavity such that air flows over a complete circular mantle surface of the support elements, where the mantle surface extends from the body to the reinforcing element. An independent claim is also included for a walking device comprising cover elements made of thermoplastic elastomer i.e. thermoplastic polyurethane.

Description

The present invention relates to a shoe bottom having a midsole body having a midsole, wherein the midsole body extends from a heel area via a midfoot area to a ball-toe area and at least one air inlet opening and at least one air outlet opening, which are in fluid communication with each other, and with one of the Bottom of the midsole body arranged outsole.

Such a shoe bottom was manufactured by the applicant in the earlier European patent application EP 08 014 825.7 Already registered, and based on the principle that air is pumped through the midsole body during walking due to the walking movement due to compression and release of an elastically yielding cover covering the ventilation channel of the midsole body. However, it has been shown that the air circulation in the midsole body, in particular when the shoe bottom is at rest or when a stationary walker, with such a shoe bottom is not completely satisfactory, because in such a rest position, the pumping movement required for circulating air is reduced or absent.

Also from the DE 76 12 524 U1 is a ventilated shoe floor known. In this shoe bottom, air may enter through air vents and flow through channels through the sole body and perforations formed in an insole toward a user's sole. The case of this shoe bottom provided air openings and channels have a small flow cross-section, which leads to a lower circulation of air.

The object of the invention is to further develop a generic shoe bottom such that the circulation of air or the ventilation in the shoe bottom or in a walker with such a shoe bottom is improved, especially in a dormant state of the shoe bottom or the walking device.

To achieve this object, it is proposed that a cavity communicating with the at least one air inlet opening and the at least one air outlet opening is formed in the midsole body, in which a plurality of preferably peg-like support elements are provided, on which a reinforcing element covering the cavity of the midsole body is supported and which are arranged to each other in the cavity, that their respective circumferential lateral surface extending from the midsole body to the reinforcing element, of air is substantially completely flowed around.

The formed in the midsole body cavity with the freely umströmbaren support elements allows in the dormant state of the shoe floor improved ventilation, since incoming air can be widely distributed in the cavity and around the support elements. In particular, in cooperation with air inlet openings and air outlet openings which have a clear width of at least 4 millimeters, this air circulation is improved. In midsole body may be by the proposed construction with large Flow cross sections between adjacent support elements form a kind of passage, as known, for example, of a room in a building in which two windows are opened simultaneously, so that air can flow through the entire cavity, in particular from the air inlet openings to the air outlet openings.

Preferably, around the support members around a clearance of at least approximately, preferably several times 4mm width and height available

The support elements are preferably attached to the midsole body, in particular integrally connected thereto; molded to this. This allows a simple production of the midsole body preferably made of plastic by casting, foaming or extrusion and a flow-optimized arrangement of support elements in a simple manner.

It is proposed that the cavity is delimited laterally by a circumferential midsole edge of the midsole body, in which the at least one air inlet opening and the at least one outlet opening are formed. The midsole edge may also be an integral part of the midsole body.

Preferably, the cavity has a varying height over the length of the midsole body. For this purpose, it is further proposed that the cavity has its maximum height in a transition region from the toe-bale region to the midfoot region, in particular in the region of a tilting edge running transversely to the longitudinal direction.

In the region of the tilting edge, at least one support element may be arranged, which is designed such that a stiffening of the midsole body is effected in this Kippkantenbereich, wherein the at least one support element is preferably made of a harder material than the midsole body. The arrangement of such a support element in the region of the tilting edge supports the so-called MBT shoes (MBT = Masai Barefoot Technology) typical walking while rolling movement of the foot or the shoe from the heel area to the toe-bale area. Furthermore, such a support element leads to a simplified construction of the midsole body compared to that of the above-mentioned earlier application EP 08 014 825.7 in which a specially configured reinforcing element forming and / or integrating the tilting edge region and having the tilting edge is embedded in the midsole body.

The support element in the tilting edge region may have a greater width and length, compared with others, preferably the other support elements.

Preferably, the at least one air inlet opening and the at least one air outlet opening are arranged at different heights relative to a base supporting the outsole. In this case, the at least one air inlet opening can be arranged lower than or equal to the at least one air outlet opening, wherein preferably the at least one air inlet opening in the toe bale area and the at least one air outlet opening in the heel area of the midsole body are provided. The arrangement of the air inlet opening and the air outlet opening at different heights can in particular also in the Cooperation with the different heights in the cavity of the midsole body lead to convective air currents in the midsole body, since heated air tends to the generally higher air outlet openings and there may escape from the midsole body. Of course, it should not be ruled out that even openings in the toe-bale area serve as air outlet openings. It may in particular be the case that, depending on the flow conditions prevailing outside the shoe bottom, the midsole body also flows through transversely to its longitudinal direction, which is supported by the continuous cavity in the midsole body and the support elements which can flow around freely.

Particularly preferably, the midsole body or its midsole edge has in each case an opening (an air outlet opening) in a rear end section of the heel region both on the inside and on the outside of the shoe bottom.

Accordingly, more preferably, the midsole body or its midsole edge in the toe-bale region and in a front end portion of the midfoot region both on the inside and on the outside of the shoe bottom at least one opening, preferably at least two openings (air inlet openings).

The reinforcing element covering the cavity is preferably rigid in bending, at least in the heel region and preferably in the midfoot region, with respect to the stresses during standing and walking. In the ball-toe area, the reinforcing element can be made bendable. The reinforcing element for the shoe bottom presented here may substantially have the shape of an insole or insole and rests on the support elements and the midsole edge. Again, this presents a simplified construction of the reinforcing member compared to that in the application EP 08 014 825.7 presented reinforcing element.

In order to enable effective air circulation to the foot of a user, it is proposed that a preferably air-permeable insole is arranged on the reinforcing element. It is preferred that openings are also provided in the reinforcing element, which allow an exchange of air between the cavity of the midsole body and the insole.

Particularly preferably, the shoe bottom has a heel piece between the outsole and the midsole body in the heel area. Preferably, the soft heel part has a convex-convex cross section and extends from the shoe bottom inside to the shoe floor outside. More preferably, it extends from the rear end portion of the heel area into the midfoot area, in particular to approximately the longitudinal center of the shoe floor. Preferably, the soft heel part is a separately manufactured component; However, it is also conceivable that the midsole body is designed as a heel piece, in which it has recesses there, such that the remaining material of the midsole body forms a heel piece.

Further particularly preferred is the shape of the outsole, and thus the together formed by the midsole body and heel soft tissue, directed downwards Surface, in the shoe bottom longitudinal direction, from the rear end to the front end of the shoe bottom, convex.

It is proposed that the midsole body has a modulus of elasticity that is at least about twice as large as the elastic modulus of the heel piece. In this case, the modulus of elasticity of the midsole body can be chosen such that the midsole body is not compressed under load or only very slightly compressed while the heel piece part is strongly compressed.

The soft heel part preferably has a height of about 17 mm to about 25 mm, in particular from about 19 mm to 22 mm. Further, it is designed such that it is compressed by the loads on the heel area when walking and standing to about half its height.

The soft heel part preferably has a Schore hardness A between 20 and 30. It is preferably made of a foamed polyurethane.

The midsole body is preferably made of an elastomer, in particular of polyurethane. It may have a Shore A hardness of preferably about 40 to 65, in particular 45 to 55.

The reinforcing element is preferably made of nylon, for example in the toe-bale area of nylon 6 (about 78 Shore D) and in the midfoot area and in the heel area of a nylon 6.12 (about 80 Shore D).

The invention further relates to a walker with a shoe bottom according to the invention and a shaft arranged on the same.

The walker or the shoe bottom may further include termination elements which are laterally attached to the midsole body and / or the heel piece, preferably are attachable to these, wherein the closure elements are preferably made of a thermoplastic elastomer, in particular a thermoplastic polyurethane. The end elements preferably have a shape corresponding to the side profile of the midsole body, so that the end elements have a type of fit for the midsole body. In this way, a positive connection between the closing element and the midsole body can be achieved, wherein this form-fitting connection can optionally be reinforced by material connection, in particular gluing or the like. The terminating elements preferably have openings which correspond to the air inlet or air outlet openings and are substantially aligned therewith, so that the circulation of air through the center bladder body is not hindered by the terminating elements.

It should also be noted that in the area of the air inlet or the air outlet openings in the midsole body or possibly in the corresponding end element covering arrangements can be provided which at least partially cover the openings, as in the earlier European patent application EP 09 010 693.1 was proposed. The relevant content of this earlier application is incorporated by reference into the present application. Such a cover arrangement reduces the penetration of dirt into the relatively large, preferably a height or width of at least 4mm Air vents and improves the appearance or design of the walker.

It should also be noted that the mentioned insole one in the earlier European patent application EP 10 000 150.2 the applicant presented insole can be. The content of this patent application is incorporated by reference into the present application with respect to the characteristics of the insole.

Fig. 1:

eine Perspektivdarstellung eines Mittelsohlenkörpers einer Ausführungsform eines erfindungsgemäßen Schuhbodens;

Fig. 2:

einen Längsschnitt durch den Schuhboden entsprechend einer in Fig. 1 für den Mittelsohlenkörper dargestellten Schnittlinie II-II mit einem gestrichelt angedeuteten Schaft zur Verdeutlichung eines Gehgeräts;

Fig. 3:

in den Teilfiguren a) bis c) Querschnitte entsprechend den Schnittlinien A-A, B-B und C-C der Fig. 2; und

Fig. 4:

eine perspektivische Explosionsdarstellung des Schuhbodens.

The above and further advantages of the present invention will be explained in more detail with reference to an embodiment, which is illustrated in the accompanying drawings and described below. It shows purely schematically:

Fig. 1:

a perspective view of a midsole body of an embodiment of a shoe bottom according to the invention;

Fig. 2:

a longitudinal section through the shoe bottom according to a in Fig. 1 for the midsole body illustrated section line II-II with a dashed line indicated shaft to illustrate a walker;

3:

in the subfigures a) to c) cross sections corresponding to the section lines AA, BB and CC of Fig. 2 ; and

4:

an exploded perspective view of the shoe bottom.

Fig. 1 shows a midsole body 10 of a shoe bottom 12 of an in Fig. 2 with a dashed line indicated shaft 14 indicated walker or shoe 16. From the

Fig. 2 Furthermore, a lying on a substrate U outsole 18 and recorded between outsole 18 and midsole body 12 heel soft part 20 can be seen. Above the midsole body 12 is a reinforcing element 22 which itself is covered by a preferably air-permeable insole 24 on which a foot of a user rests when it is received and fastened in the shaft 14. The shoe 16 exemplified here is a so-called MBT shoe (MBT = Masai Barefoot Technology), which has a destabilizing shoe bottom construction due to its construction with heel piece 20 and reinforcing element 22, so that the foot of a user must be actively kept in equilibrium. Furthermore, when walking, a pronounced rolling movement takes place due to the convex design of the shoe bottom 12 or the outsole 18 over a tilting edge K due to the substrate U.

The in Fig. 1 shown midsole body 10 has laterally air inlet openings 26 and air outlet openings 28. Preferably, in the present case three air inlets 26 located one behind the other on the inside of the shoe bottom and on the outside of the shoe are arranged in a toe ball area 27 and in a front portion of a midfoot area 37 of the shoe or midsole body 10 and the air outlet openings are in the heel area 29, in particular in the rear end portion and on the shoe floor outside and on the shoe floor inside one each. Preferably, the openings 26, 28 are made relatively large and have a width or height of 4mm and more on. Their length is preferably at least about twice their height. This results in large flow cross sections, which promote the circulation of air in the midsole body 10. In the midsole body 10, a cavity 30 is recessed, which is bounded by a particular circumferential midsole edge 32 of the midsole body 10. The air inlet openings 26 and the air outlet openings 28 are formed in the midsole edge 32 and are in fluid communication with the cavity 30 formed as a kind of recess.

To the outsole 18 out of the cavity 30 is limited by a lower midsole section 34. On this midsole section 34 a plurality of support members 36 are arranged, which are preferably designed like a pin. The support members 36 are preferably integrally formed with the midsole body 10. The base of the support elements can be adjusted as needed and selected arbitrarily, for example, circular, elliptical, rectangular, drop-shaped or the like. Preferably, the support elements, starting from the midsole section 34, are designed to be conical at the top, so that in particular frusto-conical and truncated pyramid-shaped support elements 36 ', 36 "are formed in the cavity 30.

The support member 36 '"centrally disposed at the rear end of the toe bale area 27 in the midfoot region 37 has a specific function in the shoe bottom construction, this support element 36'" lies in a tilting area with the tilting edge K extending transversely to the shoe bottom longitudinal direction and reinforcing the midsole body 10 this tilting area. Preferably, this support element 36 '"slightly harder or As an alternative to a single relatively large support element 36 '", it is also conceivable that a plurality of smaller support elements are arranged and covered by a common reinforcing cap, so that by several smaller support elements in the tilting area required reinforcement of the midsole body 10 can be achieved.

Adjacent support members 36 are spaced from one another such that space is left between adjacent support members 36 for the circulation of air in the cavity 30. The concept of the cavity 30 and the distributed support members 36 enables optimization of the shoe bottom construction with respect to the support of the foot and in terms the air circulation through the midsole body 10 therethrough. The supporting elements 36 can be completely surrounded or lapped by air along their lateral surfaces 38. For improved air circulation, adjacent support elements 36 can be arranged as far as possible from one another, in particular their spacing can be several millimeters, preferably at least 4 mm. This preferably also applies to the distance to midsole edge 32.

In the Fig. 2 the air inlet openings 26 and the air outlet openings 28 are indicated by dashed lines. Taking by way of example the lower edge of the respective openings 26, 28 as a reference, the preferred embodiment is that the air outlet openings 28 in the resting state of the shoe 16 are higher above the ground U (height H) than the air inlet openings 26 (height h ). The height difference may be, for example, about 20 mm and more. A Such arrangement of the air inlet or air outlet openings 26, 28 supports a convective air flow through the cavity 30 of the midsole body 10, since warm air rising in the cavity 30 can escape through the higher air outlet openings 28. It has also been shown that through the openings 26, 28 and the flow-around support elements 26 in the cavity 30 a kind of draft is made possible, which leads to a good ventilation or ventilation of the midsole body 10 both in the moving and in the stationary state of the shoe 16 ,

At the top, the cavity 30 is closed by the reinforcing element 22. This lies with its underside on the support members 36 and circumferentially on the midsole edge 32. It thus extends, in the illustrated embodiment, continuously from the rear end to the front end and over the entire width of the midsole body 10, except for the area of any existing and extending around the reinforcing element 22 and about this projecting seam of the midsole edge 32nd

In the reinforcing element 22 through openings 40 are provided, which allow the circulation of air to the insole 24 out, so that ventilation of the shoe interior, in particular by the preferably air-permeable executed insole 24 is made possible. As already mentioned in the introduction, the reinforcing element 22 may have the shape of an insole or an insole, as shown in particular in FIG Fig. 4 is clearly recognizable. The reinforcing element 22 covering the cavity 30 is preferably at least in the heel region 29 and preferably also in the heel region Metatarsal region 37 executed rigid. In the ball-toe region 27, the reinforcing element 22 may be designed to be bendable.

The cross-sectional representations of Fig. 3 show different sections corresponding to the section lines AA, BB and CC of Fig. 2 , The outsole 18, the midsole body 10, support elements 36 and the reinforcing element 22 can be seen in these sectional views Fig. 3a ) is still the soft heel part 20 visible. Fig. 3b ) shows the central support element 36 '" Fig. 3b) and 3c ) are respective air inlet openings 26 shown.

From the sectional views 3a) to c) it can be seen that the cavity formed in the midsole body 10 extends over the length L (FIG. Fig. 2 ) has changing cavity height HH. This height preferably has a maximum value in the tilting region, ie in the vicinity of the tilting edge K, and decreases towards the toe-bale region or toward the heel region. The height HH and the distance between the support elements 36 to each other determines respective flow cross sections between adjacent support members 36. Preferably, these flow cross sections should be maximized taking into account the design specifications for supporting the weight of a user wearing shoes with a shoe bottom construction proposed here.

On the heel piece part 20 and the midsole body 10 side end elements 44 and 46 are placed, which form the outwardly visible longitudinal end of the shoe bottom 12 and the shoe 16. The terminating elements 44, 46 preferably have one Fit so that they can be positively connected to the heel piece 20 and the midsole body 10. Additionally or alternatively, a cohesive connection may be provided between the end elements 44, 46 and the soft heel part 20 or the midsole body 10. The termination elements 44, 46 are also from the exploded view of Fig. 4 are clearly visible and are applied in the direction of the arrows AR on the midsole body 10 and on the soft heel part 20, wherein the direction AR is approximately perpendicular to the longitudinal direction L (FIG. Fig. 2 ) runs.

The closure elements 44 for the midsole body 10 have openings 26 'and 28' corresponding to and preferably aligned with the air inlet or air outlet openings 26, 28 of the midsole body 10, so that air circulation is not hindered by the closure elements 44.

The end elements 44, 46 can serve in particular as protection for the midsole body 10 and the heel piece 20, but also the possibility of different color design regardless of the color of the middle shoe body 10 and the heel piece 20, so that different shoe models with the same shoe bottom in the Interior can be made in a kind of modular design. It can also be thought that the end elements 44, 46 are given as attachable elements in different colors to a user when buying, so that the user can customize his shoe as needed with different end elements.

The end elements 44, 46 may be configured in terms of their elasticity similar to the laterally covered by the midsole body 10 and heel soft tissue part 20 so that they do not affect the function of the midsole body 10 or soft heel part 20 or only slightly. The launcher elements are optional for the push-button construction or the shoe 16 and can also be omitted if the midsole body 10 or the soft heel part 20 is designed accordingly.

In the shoe 16 shown here according to Fig. 2 It is a walker with a special shoe floor construction, known as "Masai Barefoot Technology", MBT for short, and also under the label Swiss Masai. The MBT walkers have one in the direction L and the ground U ( Fig. 2 ) convex rounded sole shape with the inserted soft heel part 20, the so-called "Masai sensor". The shoe bottom 12 has the amplifier element 24, called "shank", arranged on the midsole body 10, which reinforces the midsole in such a way that it also bears in its section located above the heel piece 20, in the stresses caused by standing and walking of the user Is essentially rigid. Due to the deliberately soft and destabilizing shoe bottom construction of the MBT walking machine, the foot loses the characteristic of the physiological locomotion support and support. This affects larger parts of the support and support muscles, because the body must be actively kept in balance, with this constant constant minimum balancing movements and adjustments to the foot muscles in search of a secure footing Coordination training is completed. Since the shoe bottom of these walkers has a considerable thickness with correspondingly good thermal insulation properties, the above-mentioned air inlet openings 26 and air outlet openings 28, the cavity 30 in the midsole body 10 and the reinforcing element 22 supporting support members 36 are provided in the cavity 30 for improved ventilation, so that Heat can be dissipated better.

For the sake of completeness, it should be noted that the toe ball region 27, the midfoot region 37 and the heel region 29 each extend over approximately one third of the shoe bottom length. In the case of the tilting edge K, the thickness of the midsole region 10, measured from the tilting edge K to the contact surface of the midsole edge 32 for the reinforcing element 22, is for example approximately 25 mm to 30 mm. Going tests have shown that at a load of 70 kg, at this point, the midsole body 10 is compressed by about 1 to 2 mm.

Preferably, from the midsole edge 32, radially outward and in the direction towards the top of the circumferential hem from, as in particular from Fig. 2 and 3a to 3c evident.

Since the midsole body 12 is only slightly compressed by the stresses during standing and walking, the volume of the cavity 30 remains almost constant. The proportion of a pumping effect on the total air circulation caused by the reduction and enlargement of the volume of the cavity 30 is negligible.

The soft heel part 20 has one of the one shoe bottom side to the other continuous, at least approximately constant cross section. He has seen in side view, approximately the shape of a convex-convex lens. It extends in an upwardly concave recess of the midsole body 12 from the rear end region of the heel region 29 to the tilting edge K approximately in the longitudinal center of the shoe bottom 12. The largest thickness of the heel piece 20 is preferably about 20mm. In the walking tests mentioned above, it has been found that the soft heel part 20 is compressed to about half. This leads to excellent damping of shocks on occurrence.

This is also confirmed by pressure tests based on ISO 844 with a punch with a diameter of 40 mm. At a load of 5000 N, spring constants of about 185 N / mm in the heel region 29, about 260 N / mm in the rear end (bale), and about 450 N / mm in the shoe bottom 12 (in the direction of height or thickness) front end portion (toes) of the toe ball portion 27 measured.

For the sake of completeness, it should be mentioned that the air inlet openings 26 can have a greater extent in the longitudinal direction of the shoe bottom than the embodiment shown in the figures, so that adjacent air inlet openings 26 are separated from one another only by (relatively thin) webs of the midsole edge 32. In particular, the rearmost of the air inlet openings 26 shown can extend into the heel area 29 and / or in the heel area 29 further air inlet or outlet air outlet openings 26, 28 can be located. Particularly preferred is on the shoe floor inside as well as on the Schuhbodenaussenseite each have a number of (largest possible) openings, which are separated by (as thin as possible) webs and which form the air inlet and outlet openings 26, 28. These ranks extend from the ball-toe region 27, over the midfoot region 37, to the rear end portion of the heel region 29. A wide ridge is located at the thinnest point of the midsole body 10 between the heel skin part 20 and the reinforcing element 22 at best.

Although the improved shoe bottom construction has been presented using the example of the MBT walkers, this is in no way a restriction on this type of walker. Rather, shoe bottoms according to the invention having a cavity in the midsole body and support elements arranged in the cavity can also be used with conventional shoes, for example sneakers. Running shoes, low shoes and the like are used.

Claims (17)

Shoe bottom having a midsole (10) having a midsole, the midsole body (10) extending from a heel region (29) over a midfoot region (37) to a ball toe region (27) and at least one air inlet (26) and at least one air outlet (28), which are in fluid communication with each other, and preferably with an underside of the midsole body (10) arranged outsole (18), characterized in that in the midsole body (10) with the at least one air inlet opening (26) and at least an air outlet opening (28) communicating cavity (30) is formed, in which a plurality of preferably peg-like support elements (36, 36 ', 36 ", 36'") are provided, on which a cavity (30) of the midsole body (10) is supported from above covering reinforcing element (22) and which are arranged to each other in the cavity (30), that each je Transverse circumferential surface (38) which extends from the midsole body (10) to the reinforcing element (22), is substantially completely flowed around by air. Shoe bottom according to claim 1, characterized in that the support elements (36, 36 ', 36 ", 36'") attached to the midsole body (10), in particular integrally formed therewith. Shoe bottom according to claim 1 or 2, characterized in that the cavity (30) laterally from a circumferential midsole edge (32) of the Midsole body (10) is limited, in which the at least one air inlet opening (26) and the at least one running outlet opening (28) are formed. The discharge chamber according to any one of claims 1 to 3, characterized in that the cavity (30) has a height (HH) varying over the length (L) of the midsole body (10). Shoe bottom according to claim 4, characterized in that the cavity (30) has its maximum height (HH) in a transition region from the toe-bale region (27) to the midfoot region (37), in particular in the region of a tilting edge extending transversely to the longitudinal direction (L) ( K). Shoe bottom according to claim 5, characterized in that in the region of the tilting edge (K) at least one support element (36 '") is arranged, which is designed such that a stiffening of the midsole body (10) is effected in this Kippkantenbereich, said at least one Support member (36 '") is preferably made of a harder material than the midsole body (10). Shoe bottom according to one of the preceding claims, characterized in that the at least one air inlet opening (26) and the at least one air outlet opening (28) are arranged at different heights (H, h) relative to a base (U) supporting the outsole (18). Shoe bottom according to claim 7, characterized in that the at least one air inlet opening (26) lower than or equal to the at least one air outlet opening (28), wherein preferably the at least one air inlet opening (26) in the toe bale region (27) and the at least one air outlet opening (28) in the heel region (29) of the midsole body (10) are. Shoe bottom according to one of the preceding claims, characterized in that the reinforcing element (22) covering the cavity (30) is made rigid in bending, at least in the heel region (29) and preferably in the midfoot region (37). Thrust tray according to claim 9, characterized in that the reinforcing element (22) in the ball-toe region (27) is designed to be bendable. Shoe bottom according to one of the preceding claims, characterized in that a preferably air-permeable insole (24) is arranged on the reinforcing element (22). Shoe bottom according to one of the preceding claims 11, characterized in that in the reinforcing element (22) through openings (40) are provided, which allow an air passage, in particular an exchange of air between the cavity (30) of the midsole body (10) and the insole (24) , Shoe bottom according to one of the preceding claims, characterized in that the midsole body (10) is made of an elastomer, in particular of polyurethane. Shoe bottom (12) according to one of the preceding claims, characterized in that between the outsole (18) and midsole body (10) in the heel region (29) a heel piece (20) is arranged. Shoe bottom according to claim 14, characterized in that the midsole body (10) has a modulus of elasticity which is at least about twice as large as the modulus of elasticity of the heel piece (20). Walking device with a shoe bottom according to one of the preceding claims and a shaft (14) arranged on the shoe bottom (12). Walker according to claim 16, characterized in that it further comprises cover elements (44, 46) which are laterally attached to the midsole body (10) and / or the heel piece (20) attachable, preferably, are attachable to this, wherein the cover (44 , 46) are preferably made of a thermoplastic elastomer, in particular a thermoplastic polyurethane.

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