WO2020156914A1

WO2020156914A1 - Sole device

Info

Publication number: WO2020156914A1
Application number: PCT/EP2020/051592
Authority: WO
Inventors: Mike-Martin Robacki
Original assignee: Reinhardt Ug
Priority date: 2019-01-29
Filing date: 2020-01-23
Publication date: 2020-08-06
Also published as: AU2020214683A1; US20220192316A1; CA3127644A1; EP3917353A1; DE102019102107A1; CN113645870A; JP2022518820A; CN113645870B

Abstract

The invention relates to a sole device (10) for shoes, in particular for ballet shoes, comprising: a backbone sole (12) having a plurality of vertebral bodies (14), which are connected to one another by joint portions (16); and intermediate spaces (18) between the vertebral bodies (14), which intermediate spaces are associated with the joint portions (16), the sole device also comprising a plurality of sticks (20) for inserting into the intermediate spaces (18). According to the invention, at least two of the plurality of sticks (20) have different thicknesses and/or cross-sections and at least one of the intermediate spaces (18) is designed to alternatively receive sticks (20) having different thickness and/or cross-sections.

Description

Sole device

The present invention relates to a sole device for shoes, in particular for ballet shoes, comprising a spine with a plurality of vertebral bodies, which are connected to one another by articulated sections, and spaces between the vertebral bodies associated with the articulated sections, the sole device further comprising a plurality of sticks for insertion into the spaces .

Such a sole device is known from EP 2742818 A1 by the applicant for the special case of use as an insole in a ballet shoe.

The insertion of a stick into an intermediate space between two vertebral bodies or the removal of an inserted stick from the intermediate space defines the bending behavior of the sole device in the region of the joint section adjoining the intermediate space between the two vertebral bodies. The sole device is basically freely bendable upwards, but downwards its flexibility is defined by the vertebral bodies and sticks - which are also referred to as intervertebral discs. Here, "top" is the side of the sole device on which the user is standing, whereas "bottom" is the side that points to the floor when walking. An integrated rubber layer creates a permanent and elastic pull on the underside of the spine. At the same time, the rubber layer serves as a barrier to prevent the sticks from sliding sideways. With the stick inserted, the course of the sole device remains straight in the area of the space in which the stick is inserted. Without a stick, the sole device is bent downwards by pulling the rubber layer or by loading until the vertebral bodies collide.

The sticks of the generic sole device are basically of the same shape, with the exception of their length, so that shorter sticks can be used in the heel area, where this known sole device has a smaller width, than in the area of the forefoot, where the sole device is wider.

The individual bending behavior of this known sole device is thus controlled exclusively by yes / no decisions, namely whether and in which spaces sticks are used. The angular behavior of the sole device is firmly defined in the intervertebral disc areas, that is to say the spaces that can accommodate a stick, namely straight or angled. The adjustable curvature curves of the sole device accordingly have large jumps and thus do not achieve any anatomically accurate adjustment. Likewise, it is not possible to set a supportive negative bend of the sole device, in which it can also form upward into the arch of the foot. The traditional pointe shoe also differentiates between different levels of hardness of the insole, which are among the most important variables in pointe shoes. A hardness that can be adjusted quickly is useful in dance medicine, among other things because a warmed foot needs different support from the insole than a cold one. However, a variable hardness behavior of the sole device cannot be set in the prior art.

It is therefore an object of the present invention to further develop a sole device of the generic type in such a way that the variability and accuracy of its bending behavior are improved.

According to the invention, this object is achieved in that at least two of the plurality of sticks have different thicknesses and / or cross sections, and that at least one of the intermediate spaces is designed to alternatively accommodate sticks with different thicknesses and / or cross sections.

Thus, different types of sticks can be used in one and the same space of the sole device according to the invention, namely sticks with different thicknesses and / or cross sections. As a result, the course of the joint section which is assigned to this intermediate space can be set much more precisely than in the prior art, which only provides the two states for such an intermediate space with the stick inserted or completely removed.

In a particularly preferred embodiment, a plurality, preferably all, of the intermediate spaces are designed to alternatively accommodate sticks with different thicknesses and / or cross sections. In the sum of all gaps, the bend of the sole device according to the invention can thus be precisely adapted to the respective user and the planned use situation. A variant in which all the interspaces have the same shape, for example rectangles, and have the same width is particularly easy to manufacture.

It is expediently provided here that at least one of the sticks has a thickness and / or a cross section such that, when inserted in an intermediate space, it gives the associated joint section a straight course. In In such an area, the sole device according to the invention then has no local bend.

Additionally or alternatively, it is expediently provided that at least one of the sticks has a thickness and / or a cross section such that, when inserted in an intermediate space, it presses apart the vertebral bodies delimiting the intermediate space. Inserting such a stick into a space thus causes a local upward bend of the sole device according to the invention, which is usually referred to as a negative bend. Replacing the stick of this type with a stick of greater thickness pushes the adjacent vertebral bodies further apart and thus reinforces the local negative bend.

Additionally or alternatively, it is also expediently provided that at least one of the sticks has a thickness and / or a cross section such that, when inserted in an intermediate space, it enables the vertebral bodies delimiting the intermediate space to approach one another. The insertion of such a stick, which does not completely fill an intermediate space, thus enables a local downward bend, which is usually referred to as a positive bend, when the sole device according to the invention is subjected to a corresponding load.

It is preferably provided here that at least one of the intermediate spaces has a rectangular or trapezoidal cross section. Such a design is particularly versatile because sticks with different cross-sectional geometries can be used, for example sticks with a likewise rectangular or trapezoidal cross-section, but also sticks with for example a round cross-section.

Alternatively or additionally, however, it is also possible that at least one of the sticks has a non-rotationally symmetrical cross section and is designed to be rotatably inserted in at least one of the spaces. Instead of, for example, replacing a narrow stick with a wide stick, in order to spread the adjacent vertebral bodies further apart and to increase the local bending of the sole device according to the invention in a negative direction, one can then turn the stick in one direction such that the diameter of the Sticks between the two adjacent vertebral bodies increases, achieve the same effect. The at least one rotatable stick expediently has an oval cross section. Then it can be rotated steplessly in its intermediate space, which allows a particularly fine adjustment of the local bending of the sole device according to the invention.

In a production-technically preferred embodiment, the at least one rotatable stick can have an elliptical cross section.

In the above-described embodiments, the sole device according to the invention can be adapted to the foot of the respective user at the beginning of the use of a shoe, and the sticks then remain permanently in their respective spaces, for example by snapping them into place. However, it is preferably provided that the sticks are designed for releasable insertion into the spaces. This applies in particular to the embodiments in which the sticks are not rotatably accommodated in the spaces. E.g. The sticks can have a shape with bays on the underside, in which the already mentioned rubber layer of the sole device runs and acts on the sticks in the direction of the vertebral bodies and the joint sections, as explained in generic EP 2742818 A1, the disclosure of which with regard to the shape of the sticks and the gaps and the function of the rubber sheet for releasably holding the sticks are hereby incorporated by reference.

The present invention further relates to a shoe comprising a sole device as described above.

Such a shoe can be, for example, a ballet shoe, an orthopedic shoe, a sports shoe or a running shoe.

Embodiments of the invention are explained below with reference to the figures as non-limiting examples. Show here:

Figure 1 is a perspective view of an embodiment of the sole device according to the invention obliquely from below when used in a ballet shoe in the demi-punch position.

FIG. 2 shows a schematic view of the sole device according to the invention from FIG. 1 from below with sticks shown in perspective above it; 3 shows a schematic side view of an embodiment of the spine and the sticks of a sole device according to the invention before the sticks are inserted into the intermediate spaces;

FIG. 4 shows a schematic side view of the spine and the sticks from FIG. 3 after the sticks have been inserted into the intermediate spaces;

Fig. 5 is a schematic side view of another embodiment of the spine and sticks;

6 shows a schematic side view of a further embodiment of the spine and the sticks;

7 shows a schematic side view of the sole device according to the invention with sticks inserted into the intermediate spaces to illustrate the bending zones of the sole device;

FIG. 8 shows a schematic side view similar to FIG. 7 to illustrate the pre-bending effect and the heel angle effect;

9 shows four schematic side views of the sole device according to the invention with different degrees of hardness;

10 shows three schematic side views of foot positions when using the sole device according to the invention in a ballet shoe; and

11 shows three schematic side views of foot positions when using the sole device according to the invention with different degrees of hardness in a ballet shoe at the tip stand.

1 shows a perspective view of an embodiment of the sole device 10 according to the invention from obliquely below when used in a ballet shoe in the demi-punch position. FIG. 2 shows a schematic view of the sole device 10 according to the invention from FIG. 1 from below, and FIG. 3 shows a schematic side view.

The sole device 10 comprises a vertebral sole 12 with a plurality of vertebral bodies 14, which are connected to one another by joint sections 16. Between two neighboring ones Vertebral bodies 14 are formed with an intermediate space 18, which is located in the schematic side view of FIG. 3 under an associated joint section 16. All intermediate spaces 18 have essentially the same width and are designed to accommodate one stick 20 each.

A rubber layer 22 is provided on the underside of the spine 12, which is particularly visible in FIG. 2. The rubber layer 22 is fastened to the right heel region in FIG. 2 and the forefoot region to the left in FIG. 2 of the underside of the spine 12 in such a way that it lies tightly against the vertebral body 14 and closes off the spaces 18 at the bottom. The rubber layer 22 creates a permanent elastic tension on the underside of the spine 12 and thus provides the spine 12 with the necessary counter-tension like a muscle. The sticks 20 are provided on their underside with suitably dimensioned bays, as can be seen in the perspective illustration of the sticks 20 in FIG. 2 above. If a stick 20 is inserted into an intermediate space 18, the rubber layer 22 engages in its bay and secures it against slipping out or even falling out. In other words, the rubber layer 22 acts as a lock for the inserted sticks 20. At the same time, the rubber layer 22 stabilizes and synchronizes the vertebral bodies 14 of the spine 12.

1 and 2 each indicate by a double arrow that a stick 20 to be replaced is pressed out of a space 18 by a new stick 20 to be inserted. If the new stick 20 to be inserted has a different thickness and / or a different cross section than the stick 20 to be replaced, this can locally change the curvature of the spine 12. For the exchange, the new stick 20 to be used only has to exert some lateral pressure on the stick 20 to be replaced in order to push it out, while the new stick 20 engages in the spine 12. Due to the constant interchangeability of sticks 20 with different angular designs and / or different widths, the effect is an always variable, supportive and angularly accurate course of the spine 12, which behaves straight as required or tilts up or down in a defined manner. This makes it possible to meet all requirements for insoles for pointe shoes at ballet or other shoes with the variability of a single spine 12. This will be explained in detail below:

3 shows a schematic side view of an embodiment of the spine 12 and the sticks 20 of a sole device 10 according to the invention before the insertion of four different sticks 20 into spaces 18, and FIG. 4 shows the situation after the sticks 20 have been inserted into the spaces 18. In this particularly simple embodiment, all the spaces 18 have the same rectangular shape and width. First, the insertion of the left of the four sticks 20 in section “a” of FIGS. 3 and 4 is considered. This stick 20 has a rectangular cross section and a thickness which correspond to the width and the cross section of an intermediate space 18. In other words, the vertical side surfaces of this stick 20 form an angle of 0 ° with the vertical side surfaces of the space 18. The insertion of the stick 20 into the intermediate space 18 is symbolized in FIG. 3 by an arrow pointing upwards. In the state inserted into the intermediate space 18, which is shown in FIG. 4, section “a”, this stick 20 thus gives the associated articulated section 16 a straight course over the intermediate space 18, labeled “180 °” in the figure. This stick 20 is therefore basically neutral with regard to the local bending of the spine 12, but prevents a local bending of the spine 12 in this area downwards.

The insertion of the adjacent stick 20 in section “b” of FIGS. 3 and 4, ie the second stick 20 from the left, is now considered. This stick 20 has a trapezoidal cross-section, its thickness in its upper region corresponding to the width of the empty space 18 and increasing from top to bottom. The left side wall of this stick 20 includes an outside angle of -a ° with the left side wall of the empty rectangular space 18, and the right side wall of this stick 20 includes an outside angle of -b ° with the right side wall of the empty rectangular space 18. As shown in the figure, negative angles denote a course in which the side wall is inclined outwards from top to bottom. The insertion of the stick 20 into the intermediate space 18 is again symbolized in FIG. 3 by an arrow pointing upwards. When inserted into the intermediate space 18, this stick 20 presses the adjacent vertebral bodies 14 apart in their lower region. In the state inserted into the intermediate space 18, which is shown in FIG. 4, section “b”, this stick 20 thus gives the associated articulated section 16 a negative bend over the intermediate space 18, that is, a locally upwardly curved course in the figure "180 ° - a ° - b °" marked. In other words, this stick 20 causes a negative bend by an angle which corresponds to the sum of its outside angles. This can be identified by the marking shown on the stick 20. In order to achieve the effect described, the sticks 20 can be produced from a material, in particular a plastic material, which has a greater hardness and strength than the material of the spine 12, at least as the joint regions 16. In other words, the sticks can be selected in a suitable manner 20 on the one hand and the different areas of the spine 12 on the other hand, it can be ensured that the pushing in of a stick 20 into an intermediate space 18 leads to a bending of the associated joint area 16 as the most flexible affected material area leads. As a rule, however, the sticks 20 on the one hand and the spine sole 12 on the other hand are made of the same material, in particular plastic material. The tear-resistant and minimally stretchable plastic used has a certain flexibility, which decreases with increasing thickness of the material. This means that the flexibility of the thin-layer material in the joint regions 16 of the spine 12 is sufficient for the bending effects according to the invention, while the thicker, but otherwise the same material of the vertebral bodies 14 and sticks 20 transmits the forces with the necessary stability. It is therefore not necessary for the sticks 20 to use other material, since they do not derive the forces over their longitudinal configuration, but rather across them, where practically no relevant elasticity effect can be seen.

In any case, the material of the vertebral sole 12, the vertebral body 14 and the joint areas 16 are generally produced in one piece by injection molding, must be sufficiently strong and stable to be able to withstand the required support pressure when using the shoe.

The insertion of the adjacent stick 20 in section “c” of FIGS. 3 and 4, that is to say the second stick 20 from the right, is now considered. This stick 20 has a trapezoidal cross section, its thickness in its upper region corresponding to the width of the empty space 18 and decreasing from top to bottom. The left side wall of this stick 20 forms an angle of c ° with the left side wall of the empty rectangular space 18, and the right side wall of this stick 20 forms an angle of d ° with the right side wall of the empty rectangular space 18. As shown in the figure, positive angles denote a course in which the side wall is inclined inwards from top to bottom. The insertion of the stick 20 into the intermediate space 18 is again symbolized in FIG. 3 by an arrow pointing upwards. When inserted into the space 18, this stick 20 enables the vertebral bodies 14 delimiting the space to approach each other in their lower region. In the state inserted into the intermediate space 18, which is shown in FIG. 4, section “c”, this stick 20 thus gives the associated articulated section 16 a positive bend over the intermediate space 18, that is to say a locally bent curve in the figure "180 ° + c ° + d °" marked. In other words, this stick 20 causes a positive bend by an angle which corresponds to the sum of its outside angles. This can be identified by the marked “+” on the stick 20

Now consider the insertion of the adjacent stick 20 in section “d” of FIGS. 3 and 4, that is, the right stick 20. This has a trapezoidal cross-section similar to the neighboring stick 20 in section “c” of FIGS. 3 and 4, however are the angles e ° and f °, which enclose its side walls with the left or right side wall of the empty rectangular intermediate space 18, larger than the angles c ° or d ° of the adjacent stick 20. In comparison with the neighboring stick 20 in section “c”, the right one confers Stick 20 in section “d” of FIGS. 3 and 4 the associated joint section 16 thus has an even stronger positive bend, that is to say a locally even more downwardly curved course, identified in the figure by “180 ° + e ° + f °”. This can be identified by the marked “++” on the stick 20. Overall, the sticks 20 can have different, finely graduated angles, which can be combined with the static angles of the spine 12 almost as desired. FIG. 4 also shows the large-area and stable frictional connection between vertebral bodies 14 and sticks 20, which makes it possible, among other things, to reduce the material thickness of the spinal sole 12 compared to the prior art.

It goes without saying that the sole device 10 according to the invention can not only include sticks 20 of different strengths in the shape of a trapezoid for positive bends, but correspondingly also sticks 20 of different strengths in the shape of a trapezoid for negative bends similar to the stick shown in section “b” of FIGS. 3 and 4 20. It also goes without saying that not only two sticks 20 of different trapezoidal shapes can be provided for each bending direction, but rather a much larger number in order to enable the local bending at each intermediate space 18 to be graduated as finely as possible.

It is also understood that a straight course as in section “a” of FIGS. 3 and 4 can be achieved not only by inserting a rectangular stick 20 into a rectangular space 18 of the same width, but also, for example, by inserting a trapezoidal stick 20 into a complementary trapezoidal space 18, by inserting a triangular stick 20 into a complementary triangular space 18, etc.

In general terms, the geometry of the spaces 18 can have a variety of angles and shapes, which are then mirrored by the cross sections and / or widths of the sticks 20 either to ensure a straight course of the spine 12, or with alternative cross sections and / or thicknesses can be added to or subtracted from the cross sections and / or thicknesses of the spaces 18 in order to control the bending behavior of the spine sole 12 to the exact degree.

5 shows a schematic side view of another embodiment of the spine 12 and sticks 20 according to the invention. The left stick 20 corresponds to that in section “a” of FIGS. 3 and 4. It is therefore rectangular and has a thickness and one Cross-section such that it fits exactly into an empty space 18. With regard to the local bend, this stick again behaves neutrally, ie it leaves the locally straight course of the associated joint section 16 unimpaired, but blocks the adjacent vertebral bodies 14 from approaching one another and thus prevents the occurrence of a positive bend locally.

The middle stick 20 in FIG. 5 is also rectangular, but its thickness is greater than the width of an empty space 18. When inserted into the space 18, this stick 20 thus pushes the adjacent vertebral bodies 14 apart. Thus, this stick 20 locally causes a negative bend of the spine 12, namely a local bend upwards. Of course, this stick 20 also blocks the adjoining vertebral bodies 14 from approaching one another and thus prevents the occurrence of a positive bend locally.

The right stick 20 in FIG. 5 is also rectangular, but its thickness is smaller than the width of an empty space 18. When this stick is inserted into a space 18, it allows the adjacent vertebral bodies 14 to face each other when loaded move until they hit the stick 20. In other words, this stick 20 locally allows a predetermined positive bend of the spine 12, namely a local bend downwards.

The embodiment of the sole device 10 according to the invention shown in FIG. 5 is less expensive to produce, since only rectangular sticks 20 are to be produced, however the frictional connection between the vertebral bodies 14 and the sticks 20 is less than that shown in FIGS. 3 and 4 Embodiment. Therefore, the embodiment of FIG. 5 should be used especially in cases where the sole device 10 is subjected to little stress.

FIG. 6 shows a schematic side view of a further embodiment of the spine 12 and the sticks 20, which in this embodiment have an oval cross section. In this embodiment, the sticks 20 are completely surrounded by the material of the vertebral sole 12, so that there are joint sections 16 both above and below a stick 20 which connect the adjacent vertebral bodies 14 to one another.

In this embodiment, the sticks 20 are rotatably received in their respective gaps 18, which are laterally delimited by adjacent vertebral bodies 14 and above or below by adjacent joint sections 16. By turning it set different diameters of a stick 20 between the two adjacent vertebral bodies 14. If one rotates a stick 20, for example, into a position in which its long diameter runs essentially parallel to the longitudinal direction of the spine 12, the adjacent vertebral bodies 14 are pushed apart as much as possible, which locally gives the spine 12 a negative bend, i.e. an upward bend 6, compare the second stick 20 from the left, for example.

If, on the other hand, you turn a stick 20 into a position in which its short diameter runs essentially parallel to the longitudinal direction of the spine 12, the adjacent vertebral bodies 14 can be moved towards one another under load, which locally gives the spine 12 a positive bend, i.e. a Bend downwards, compare, for example, the right stick 20 in FIG. 6.

The embodiment shown in FIG. 6 with rotatable sticks 20, which are completely surrounded by sole material, is conceivable in particular for sports shoe soles with softer soles, the elasticity of the material making the rotation of oval sticks 20 in the surrounding sole material possible. The effect here is in particular a variable elastic curve of the sole tension. Such oval sticks 20 could, however, in other types of shoes, in particular ballet shoes, also be introduced into the rectangular or trapezoidal spaces 18 shown in FIG. 3 and have a correspondingly rotatable effect. In both cases, the oval stick 20 can either be threaded or via locking mechanisms such as e.g. Gear mechanisms can be fixed and rotated.

7 shows a schematic side view of the sole device 10 according to the invention with various sticks 20 inserted into the interspaces to clarify the bending zones of the sole device 10. The forefoot area of the sole device 10 is left in this figure, the heel area right. FIG. 8 shows a schematic side view similar to FIG. 7 to clarify the pre-bending effect and the heel angle effect, and FIG. 9 shows four schematic side views of the sole device 10 according to the invention with different degrees of hardness set with the aid of different sticks 20. The forefoot region of the sole device 10 is at the bottom in all side views of this figure, the heel region at the top. 10 illustrates schematic side views of foot positions when the sole device according to the invention is used in a ballet shoe when walking (top), at half tip (demi pointe, bottom left) and when standing on tip (bottom right), and FIG. 11 shows schematic side views of Foot positions when using the sole device 10 according to the invention with different degrees of hardness in a ballet shoe at the top stand. The exemplary spine 12 shown in all of these figures should have a total of ten spaces 18 into which sticks 20 are inserted. It goes without saying that the spine 12 can also have a different number of spaces 18, and that individual spaces 18 can also remain empty depending on the use of the shoe, the insole of which comprises the spine 12 according to the invention.

The section in FIG. 7 marked with a dashed line and labeled “A” represents a zone of free mobility up to half the tip, also referred to as “demi-punch zone”. In this zone, in this example, there are the six foremost sticks 20, which allow the spine 12 to roll and stand on the half-point (demi pointe), since the spine 12 is not limited in the upward bend, whereas the downward bend is controlled by the sticks 20 used.

The portion in Fig. 7 marked with a broken line and designated "B", which in this example is the rear half of the portion "A" with three sticks 20, represents a zone for setting the pre-bend, i.e. degree of hardness.

The traditional pointe shoe distinguishes different degrees of hardness of the insole. The height which can be adjusted with alternative sticks 20 and the degree of pre-bending of the spine 12 define the angle which the outer pointe shoe can take when standing on tip, cf. 8 and the four schematic side view in FIG. 9. More pre-bending means that the shoe is given more space by the spine 12 to tilt further forward, as in FIG 1A is shown, however, less pre-bending forces the shoe back, cf. Fig. 1 1 B. With optimal adjustment of the pre-bend and heel angle, the spine 12 develops its best support function, which is shown in Fig. 11 C. Especially in the area of the heel angle, pressure is already released and the forefoot in the cap is relieved.

The section marked with a dashed line and labeled “C” in FIG. 7 represents a zone for adjusting the heel angle, cf. the lower hatched area marked with “C” in FIG. 8 and the four schematic side view in FIG. 9. In this example the section “C” comprises the rear four sticks 20 of the spine 12. When the foot is stretched out, a clear kink is shown in the Transition from the sole of the foot to the heel. An insole for pointe shoes should therefore be able to adapt optimally to this kink, on the one hand to give the heel the necessary space and on the other nowhere to lose supportive contact from the insole to the foot. The heel angle is different for each foot and can be adjusted precisely with the sole device 10 according to the invention. In the rear area of the spine 12, the height and the degree of the heel angle are precisely defined. Here, “height” denotes the position of the angle-giving sticks 20 for the necessary heel angle. 7-9, these black-drawn angle-giving sticks 20 are at positions 9 and 10, but other positions could also be selected, for example 8 and 9 or also 7 and 8, depending on the size and individual anatomy of the foot . The same heel angle setting is shown in FIGS. 7-9 so that differences in the pre-bending effect, the so-called “hardness setting”, are more clearly visible. The “degree of heel angle” denotes the number of sticks 20 used or their angle design. This guarantees the unique support function of the spine 12, in which pressure is reduced at the point of the heel angle and the forefoot in the toe area of the pointe shoe is medically significantly relieved, as shown in FIG. 11C.

By means of negatively angled sticks 20, as exemplified in section “b” of FIGS. 3 and 4, it is achieved in the sole device 10 according to the invention that the spine 12 can bend upwards with a precisely defined negative bend and can follow the arch of the foot anatomically precisely. Thus, the invention of the spine 12 guarantees a better support function, which, when standing on tip, primarily depends on the exact fit of the setting for the heel angle. The negative bending of the sticks 20 also compensates for the inherent expansion of the material of the spine sole 12. This guarantees a higher force absorption in the heel angle range, and the shock-absorbing properties of the spine sole 12 are more effective. In Fig. 9, the effect of negative bending is exaggerated for illustration.

Claims

Expectations

1. Sole device (10) for shoes, in particular for ballet shoes, comprising a spine (12) with a plurality of vertebral bodies (14) which are connected to one another by articulated sections (16), and spaces (18) between the vertebral bodies which are associated with the articulated sections (16) (14), the sole device further comprising a plurality of sticks (20) for insertion into the spaces (18), characterized in that

at least two of the plurality of sticks (20) have different thicknesses and / or cross sections, and that at least one of the intermediate spaces (18) is designed to alternatively accommodate sticks (20) with different thicknesses and / or cross sections.

2. Sole device (10) according to claim 1, characterized in that several, preferably all the spaces (18) are designed to alternatively accommodate sticks (20) with different thicknesses and / or cross sections.

3. Sole device (10) according to claim 1 or 2, characterized in that at least one of the sticks (20) has such a thickness and / or such a cross section that, when inserted in an intermediate space (18), the associated joint section (16 ) gives a straight course.

4. Sole device (10) according to one of the preceding claims, characterized in that at least one of the sticks (20) has such a thickness and / or such a cross section that, when inserted in an intermediate space (18), it covers the intermediate space (18 ) pushing apart the vertebral body (14).

5. Sole device (10) according to any one of the preceding claims, characterized in that at least one of the sticks (20) has such a thickness and / or such a cross section that, when inserted in an intermediate space (18), it approximates the intermediate space (18) limiting vertebrae (14) to each other.

6. Sole device (10) according to one of the preceding claims, characterized in that at least one of the intermediate spaces (18) has a rectangular or trapezoidal cross section.

7. Sole device (10) according to one of the preceding claims, characterized in that at least one of the sticks (20) has a non-rotationally symmetrical cross section and is designed to be rotatably inserted in at least one of the intermediate spaces (18).

8. Sole device (10) according to claim 7, characterized in that the at least one rotatable stick (20) has an oval cross section.

9. sole device (10) according to claim 8, characterized in that the at least one rotatable stick (20) has an elliptical cross section.

10. Sole device (10) according to one of the preceding claims, characterized in that the sticks (20) are designed for releasable insertion into the intermediate spaces (18).

11. Shoe comprising a sole device (10) according to any one of the preceding claims.

12. Shoe according to claim 11, which is selected from the group consisting of a ballet shoe, an orthopedic shoe, a sports shoe and a running shoe.