CN1211901A - Shoes with a deformable insole that can adapt to the shape of the sole of the wearer's foot - Google Patents

Abstract

Footwear with uppers (A) and a lower support part (1) for the wearer's foot connected to the aforementioned uppers, said part (1) consisting of a sole (2) on which a wedge (3) is placed, accommodating at least one internal insole (6) or midsole that comes into contact with the wearer's foot; means that yield under the wearer's weight are incorporated beneath at least part of the insole in the support part (1), these means allowing deformation of the insole such that the latter permanently takes on the specific shape of the foot sole of the person wearing the shoe.

Description

Shoes with deformable insoles adapted to the shape of the wearer's sole

The invention relates to a shoe according to the preamble of the main claim.

As we all know, the shape of the soles of people's feet varies from person to person. It has also been known for a long time that the more a shoe (such as those called "shoes") has an insole that fits the anatomy of the foot, the more comfortable and stable the shoe will be when the foot hits the ground, thereby preventing Microinjury (bone or muscle) to the wearer of the shoe, especially as a result of prolonged use of the shoe.

Shoes with an insole adapted to the anatomical shape of the foot have long been known, however, precisely because the shape of the sole of the foot varies from person to person, such insoles only have a rough conformity to the anatomical shape of the foot, namely: Shoes are generally designed to conform to the general shape of the sole of the average user's foot. In other words, the anatomical insoles of the shoes available on the market are shaped to only partially adapt to the shape of each wearer's sole. The result is that the known anatomical shoes often do not adapt to the shape of the sole of the wearer's foot, especially after prolonged use, thereby subjecting the wearer's foot to a great deal of fatigue, the disadvantages of which are obvious.

Shoes are known in which the insole deforms continuously, but not permanently, under the weight of the wearer and thus adapts the shoe to the shape of the sole of the user's foot. After use, the insole of such a shoe springs back to its original shape. However, this solution does not provide sufficient comfort and entails relatively high production costs and is mainly used for footwear with a specific character such as clogs.

In addition, the shoe loses its ability to adapt to the shape of the sole of the foot over time.

An object of the present invention is to provide an anatomical shoe which is improved over existing solutions.

In particular, the object of the present invention is to provide a self-shaping anatomical shoe in which the insole perfectly and permanently adapts to the shape of the sole of the dedicated user.

Another object of the present invention is to provide a shoe of the above-mentioned type, which has low production costs and can provide adequate stability to the foot when it is placed on the ground under any conditions of use, thereby preventing damage to the bones or muscles of the wearer's lower extremities. cause microdamage.

A further object of the present invention is to provide a shoe of the above type which, due to its anatomical nature, properly compensates the impact of the foot against the ground.

These and other objects, which will be understood by an expert in the field of the invention, are achieved by the shoe described in the appended claims of the invention.

The shoe according to the invention can be a light shoe or a sports shoe. In the latter case, the shoe can be equipped with means capable of absorbing the impact on the ground and at the same time returning the maximum absorbed energy to the wearer's foot, much like a rebounding spring.

For a better understanding of the present invention, the present invention is illustrated below in conjunction with the accompanying drawings by non-limiting examples only as examples, in the accompanying drawings:

Figure 1 is an exploded perspective view of a shoe according to the present invention;

Figure 2 is a bottom perspective view of a portion of the shoe shown in Figure 1;

Fig. 3 is a cross-sectional view taken along line 3-3 in Fig. 1 and to the assembled shoes;

Fig. 4 is a sectional view along line 4-4 in Fig. 3;

FIG. 5 is a partially exploded perspective view of a variation of the shoe shown in FIG. 1. FIG.

Referring to Figures 1-4, the sports shoe of the present invention comprises an upper A and a bottom or support 1. The latter includes, for example, a shoe sole 2 made of synthetic rubber, on which a shoe sole 2 made of a known porous material (ethylene-vinyl acetate copolymer-EVA) or polyurethane or low-density rubber is fixed in a known manner. Formed wedge 3. The wedge 3 has an upper recess 4 (cf. FIG. 1 ), delimited by a flange 4A, in which a mounting insole 5 made, for example, of cork can be placed. Another insole 6 , made of, for example, fabric (not shown in FIG. 3 ) on which the wearer's foot rests, can be placed on top of the insole 5 . The sole 2 has on its lower surface what are known as grooves or groove parts.

According to the invention, the insole or midsole 6 on which the wearer's foot rests can be permanently deformed after the shoe has been worn at least once. This deformation reflects the shape of the sole of the foot so that it can be adapted to the shape of the sole of the foot. The insole thus has an anatomical form corresponding to the sole of the wearer's foot.

The deformation of the insole is preferably obtained by ensuring that it bears directly or indirectly on a base layer of soft material, advantageously bonded over the wedge 3 . This insole can be deformed over its entire surface or only in specific areas.

With reference to the cited figures, in order to obtain the above-mentioned deformation, the shoe is preferably provided with a wedge 3 having a cavity 10 at its bottom (the cavity 10 is enclosed by a layer 10A integral with the wedge and the recess 4 Separated and endowed with autonomous flexibility), the cavity 10 faces the sole 2 and contains a layer of particles whose particle size is between 0.7 and 4 mm depending on the type of shoe. The particles can be made from synthetic or natural materials. The granular layer can be made, for example, of granular ethylene-vinyl acetate copolymer (EVA), granular rubber (synthetic or natural), cork or granular bulky material. Alternatively, the granular layer 11 can also be a mixture of these materials, For example, these materials are placed in different regions of the cavity 10: at this time, due to the different deformability of the above-mentioned materials, under the action of the weight of the wearer, different regions corresponding to different parts of the wearer's foot can be obtained. Deformation level 11. In this way, the wearer's foot can be supported in a differentiated manner, for example depending on the type of shoe (sports shoe or sports shoe), thanks to the action of the lower support part 1 .

Since the weight of the wearer acts on the support portion 1 in a differential manner and mainly on the area corresponding to the heel of the foot (marked K in FIG. 3 ), the layer 10 here is thicker than in the metatarsal area (marked with M in Figure 3).

Alternatively, in order to deform the insole 6 (and the underlying insole 5, if any), the layer 10 can be divided into several non-connected areas: for example corresponding to the arch area (denoted by P in FIG. 3 mark) is provided with a particle layer for providing sufficient semi-rigid arcuate support to the wearer (because the wedge 3 itself is at least partially soft).

Thus, layer 11 yields under the weight of the wearer during use. This yielding enables a corresponding deformation of the insole 6, especially since the weight is naturally distributed and mainly in certain areas of the insole 6 (plantar M and heel K), which will be less than the other. Adjacent areas, such as those supporting the side of the foot, are subject to greater deformation. The deformation described above involves bending the insole towards the sole, wherein the insole sags towards the sole. The granular material in the layer 11 moves towards the respective cavities 10 to allow the insole to bend towards the turn and at the same time there is less weight on the lower support 1 of the shoe in the desired position, i.e. the wearer Those parts provide support for the feet. This gives greater comfort to the wearer and makes the foot less tiring during use. Furthermore, the specific composition of the shoe according to the invention causes less damage to the bone and muscular structure of the wearer during use such as performing sports activities.

It should be noted that after the first movement of the particulate material from the layer 11, and in any case after the material has reached its final position in the cavity 10 of the wedge 11 (preferably achieved after prolonged use by the wearer). This point above), the material (due to the weight of the wearer) is compacted, thereby permanently remaining above the above position. In doing so, the insole on which the wearer's foot rests permanently maintains the acquired foot anatomical shape, which corresponds to the shape of the sole of the wearer's foot.

In order to further improve the comfort of the shoe, and also to absorb the impact of the wearer's foot on the ground and to return to the wearer part of the energy that would otherwise be lost during the impact, at least one including the ability to perform Insert 13 of the above described suitable means of damping and returning energy to the foot. Such an insert may be of the type already described in a previous patent application by the same Applicant: for example it may comprise an airtight housing in which at least one layer of deformable barrel-shaped elements (not shown in the figures) are placed. Out), these elements are connected to each other in their widest middle area, and their opposite sides are connected to opposite surfaces of the housing. According to a variant, which is also always the subject of another patent of the applicant, such an insert may comprise a housing containing a fluid in liquid form and a fluid in gaseous form (not shown in the figures), The gaseous fluid is absorbed by the liquid when the wearer steps on the ground and compresses the insert; like this, the gas absorbed by the liquid produces a damping effect which partially absorbs the wearer's transmission to the ground. energy of. When the wearer's pressure on the insert ceases, the gas is dislodged by the liquid and released in the housing, creating a resilient thrust against the foot, thereby enabling the foot to be more easily lifted off the ground.

The insert 13 is embedded in the granular layer 11 which holds it in place (area K). On the other hand, the wedge in zone K may also comprise a special housing (connected by shape-determining walls) adapted to receive and hold the insert 13 in a fixed position.

According to another embodiment of the invention, another insert 13A, of the same or equivalent type as the insert 13 described above, can be placed in the bone region M of the bearing 1 (shown in dashed lines in FIG. 2 ).

A further embodiment of the present invention is represented by Figure 5, wherein those parts corresponding to those of the preceding figures are indicated by the same numerals as before. In Fig. 5, the upper of a shoe has been connected to the wedge 3 (at least the insole 6 (not shown in the figure) is arranged on the wedge 3). According to the invention in the form considered, means adapted to return energy to the wearer's foot after it has come into contact with the ground and thereafter lifted, while supporting the foot from a suitable form, are associated with the wedge 3 . These devices, which have been described in a previous patent of the applicant of the present invention, comprise at least one insole 40 made of composite material located between the wedge chamber 10 and the sole 2 . The insole 40 is provided with a first part 50 made of a woven composite material (that is: the woven composite material comprising weft fibers T and warp fibers O combined to form a common fabric); these fibers may be impregnated with a thermosetting resin ( or carbon resin) and/or carbon resin (aramid fiber impregnated with a thermosetting resin) with a fiber material commercially known as Kevlar. As long as carbon fibers are coupled with aramid fibers, a fabric can be obtained in which, for example, the weft threads are carbon fibers and the warp threads are aramid fibers or Kevlar. The aforementioned weft T (or warp O) fibers are all arranged parallel to each other and all have a predetermined angle with respect to the longitudinal axis X of the shoe (ie the weft fibers are perpendicular to the warp fibers).

The second portion 51 of the woven composite material is connected to the first portion 50 in a known manner and positioned to conform to the arch of the wearer's foot, and the third portion 52 of the woven composite material is placed to conform to the wearer's metatarsal region ( As shown in the example in the figure under consideration, it can cover the whole part of the shoe between the front toe 53 and the part 51 ). The second part 51 and the third part 52 define a second insole 55 made of composite material. The first portion includes side tongues 50A and 50B.

In particular, the first and second portions 50 and 51 have their fibers (carbon fibers, aramid fibers or the like) arranged to cross each other to provide considerable torsional rigidity to the corresponding parts of the sole of the foot. In other words, the weft T and warp O fibers in one section (eg, section 50) are arranged at a different spatial angle than the weft T' and warp O' fibers of the second section (51). For example: the weft line T is at 45° to the longitudinal axis X of the sole, and the fiber T' is at 90° to the same axis X. In particular, the overlap of portion 50 with portion 51 in the arch support area produces an assembly with high torsional rigidity. In addition, the arch support is also rigid when flexed.

Part 52 configures its fibers (weft thread T " and warp thread O ") in a single direction, the meaning of doing like this is: the weft and warp fibers on this part are arranged parallel to a predetermined spatial direction, i.e. : All fibers have a predetermined angle relative to the axis X (although they themselves still maintain a 90° relationship). The T" and O" fibers in section 52 are parallel to the lower and O fibers in section 50 , and the T and O fibers are present in the section of section 50 that cooperates with section 52 . The unidirectional fibers in the portion 52 and the corresponding portions of the portion 50 (their T and T "weft fibers and O and O" warp fibers parallel to each other) enable the metatarsal region M of the sole (in the direction indicated by the arrow F) bend, and can also bend in the case where part 52 is associated with part 50 to allow normal bending in the region around axis W, which is perpendicular to the longitudinal axis of the shoe and is located between toe 53 and part 51.

In the embodiment considered, on the upper support part 1 of the shoe, the sole 2 (fixed to the insole 40) can be divided into two parts 57 and 58 for covering the metatarsal area M and the heel area K respectively. the insole of the shoe. Thus, according to the considered embodiment, the insole 40 has two clearly separated specific parts, a rigid part corresponding to the arch support area (P) of the shoe and a flexible part located between the toe 53 and the aforementioned area P. part.

In use, the sole produced according to the present invention will produce sufficient rigidity to fully support the wearer's foot during the movement of the wearer's foot; however, because the metatarsal region is sufficiently flexible, the sole has an appropriate "flexibility", which does not negatively affect the bone or muscular structure of the wearer's foot, thus preventing the occurrence of rather dangerous microfractures, especially if the wearer is an athlete, in addition, from the toe The flexibility of the area M covered by the part 52 extended to the part 51 plays the role of returning the maximum possible energy that the wearer applies to the ground in motion to return to the wearer, thereby producing a considerable thrust (this point is very important in competitive situations). superior, such as athletics or basketball).

Preferably, between the wedge 3 of the insole 40, and more precisely between the cavity 10 of the wedge containing the particle layer 11 and the insole 40 made of composite material, there should be a layer of flexibility Material (such as bulky material or rubber) 60, this layer of material can effectively close the cavity 10 and play the role of damping the impact force generated by the wearer acting on the ground during motion.

The embodiment of the invention represented by Figure 5 enables us to obtain a shoe that anatomically adapts to the athlete's foot without preventing the insole 40 from moving the above-mentioned shoe after the foot hits the ground and is lifted from the ground. Energy returns to this characteristic of the foot.

According to a variant of the invention represented by FIG. 5 , an overhang 59 protrudes beyond portion 51 at a distance from portion 51 and in the same plane as it. This overhang (or tongue) 59 is preferably made of a composite material that is woven from its weft and warp fibers that are oriented in the same way as the fibers of portion 50 and are aligned with portion 50. The fibers are parallel (ie: unilateral), the overhang 59 protrudes into a corresponding shell 65 of the portion 58 of the sole 2 . This design improves the stability of the shoe 1 and thus also the correctness of the support of the wearer's foot on the ground.

Different structural forms of the invention have been described thus far. Nevertheless, other configurations are conceivable in view of the foregoing detailed description. For example, the insole 6 itself can be made flexible (for example incorporating granular material inside it). These other solutions should be considered within the scope of the present invention.

Claims (28)

1. footwear, it comprises upper of a shoe (A) and the leftover bits and pieces support (1) that combines with upper of a shoe (A), this support (1) comprises a sole (2), dispose a wedge shape part (3) thereon, this support (1) holds at least one interior end (6) of footwear that is suitable for contacting wearer's pin, it is characterized in that: the end, can permanently be out of shape after using at least for the first time at footwear in thereon these footwear for wearer's pin is stepped on, the sole shape of above-mentioned pin is followed in this distortion, and therefore above-mentioned sole takes the anatomic shape corresponding to wearer's sole shape.

2. footwear as claimed in claim 1, it is characterized in that: the end (6), lie on the flexible apparatus (11) directly or indirectly in the footwear, flexible apparatus (11) produces bent recess under wearer's weight, it makes, and the end, deform in the footwear, makes the interior end of footwear permanently take the special shape of wearer's pin sole thus.

3. footwear as claimed in claim 2 is characterized in that: flexible apparatus is made up of one deck (11) granular materials, and granular materials is configured in and is positioned at the bottom of the deformable footwear among the containment means (3) under (6).

4. footwear as claimed in claim 3 is characterized in that: granular materials is a synthetic material.

5. footwear as claimed in claim 4 is characterized in that: granular materials is granular ethene-vinyl acetate copolymer.

6. footwear as claimed in claim 4 is characterized in that: granular materials is granular synthetic rubber.

7. footwear as claimed in claim 4 is characterized in that: granular materials is granular bulky material.

8. footwear as claimed in claim 3 is characterized in that: granular materials is natural class material.

9. footwear as claimed in claim 8 is characterized in that: granular materials is granulated natural rubber or cork.

10. footwear as claimed in claim 8 is characterized in that: stratum granulosum (11) comprises the particle of different materials.

11. footwear as claimed in claim 3 is characterized in that: its scope of particle size that forms the flexible apparatus volume is between 0.5～4mm, and the type of footwear is depended in the selection of particle size, that is the purposes of planning.

12. footwear as claimed in claim 3 is characterized in that: the device that holds granular materials is wedge shape part (3), and it has the chamber (10) that comprises above-mentioned layer.

13. footwear as claimed in claim 11 is characterized in that: the chamber (10) that comprises stratum granulosum has the different depth of representing wedge shape part zones of different, and this degree of depth is bigger during corresponding to the zone (K) of wedge shape part (3), corresponding to wearer's heel.

14. footwear as claimed in claim 3 is characterized in that: stratum granulosum (11) is continuous, that is: it is to step in thereon the footwear the whole area at the end (6) along wearer's pin to arrange.

15. footwear as claimed in claim 3 is characterized in that: stratum granulosum (11) disperses, and it has different piece, and the zones of different that these parts are stepped on the end (6) in thereon the footwear according to wearer's pin separately separately and the location.

16. footwear as claimed in claim 1 is characterized in that: footwear comprise device (13,40 and 60), and they are suitable for absorbing pin and give pin to the impulsive force on ground and when pin is lifted away from ground with energy rebound.

17. footwear as claimed in claim 16 is characterized in that: the device (13) of absorption and recurrence energy is embedded among the layer of granular material (11).

18. footwear as claimed in claim 16 is characterized in that: absorb and the device (13) that returns energy is arranged in a relevant position of the wedge shape part (3) between the sole (2) of wedge shape part (3).

19. footwear as claimed in claim 16, it is characterized in that: the device (13) of absorption and recurrence energy comprises that at least one has the insert of air tight enclosure (13), be placed with many barrel-shaped elements in housing, they are interconnected on together and are connected by the surface of their opposite ends in the zone therebetween.

20. footwear as claimed in claim 16, it is characterized in that: the device (13) of absorption and recurrence energy comprises that at least one has the insert of seal casinghousing (13), comprise at least two kinds of fluids in the housing, first kind of fluid can be absorbed by second kind of fluid, thereby absorb the power that is produced when the wearer contacts with ground and store the wearer passes to ground when mobile energy to small part, first kind of fluid evicted from by second kind of fluid when pin is lifted away from ground, thereby produces the thrust towards pin self.

21. footwear as claimed in claim 16, it is characterized in that: the device of absorption and recurrence energy comprises a flexible material layer (60), it plays a part damper, be placed between the parts (40) that layer of granular material (11) and is made up of composite, these parts (40) work to return energy.

22. footwear as claimed in claim 21, it is characterized in that: composite material component (40) is the end and comprise that a rigid element and of placing corresponding to the arch support zone (P) of sole is positioned over second flexible portion between toe cap (57) and this arch support zone (P) in the footwear, and this second portion can be at least round (W) bending between the arch support zone (P) that is positioned at toe cap (57) and footwear.

23. footwear as claimed in claim 22 is characterized in that: the composite of sole (40) comprises braided fiber, and the fiber of rigidity first intersects, and the fiber of flexible second portion then is unidirectional.

24. footwear as claimed in claim 22, it is characterized in that: the rigidity first of composite material component (40) comprises two-layer at least woven composite, the parallel of ground floor and meridional fibers are positioned on the longitudinal axis (X) plane at angle with footwear, the parallel of the second layer and meridional fibers then are positioned on the angle plane different with the ground floor fiber with respect to axle (X), and therefore two-layer fiber intersects.

25. footwear as claimed in claim 22, it is characterized in that: the flexible second portion of composite material component (40) comprises one deck woven composite at least, its equator is positioned at respect to the footwear longitudinal axis (X) to become on the plane of same angle with meridional fibers, that is: they are unidirectional.

26. footwear as claimed in claim 22, it is characterized in that: the flexible second portion of woven composite parts (40) comprises the composite that multilayer overlaps, and the parallel in all these layers all is positioned at respect to the footwear longitudinal axis (X) to become on the plane of same angle with meridional fibers.

27. footwear as claimed in claim 22, it is characterized in that: composite material component (40) comprises the start-up portion (50) of a woven composite, its supporting second and third part (51 and 52), second and third part equally also form by woven composite and placed by Plantar bone zone (7A) and arch support zone (6A) according to sole at least, it is corresponding with the fiber of third part (52) with meridional fibers that above-mentioned start-up portion (50) has parallel at grade, these fibers of third part then be arranged in the corresponding fiber that intersects with first on the different plane.

28. footwear as claimed in claim 27 is characterized in that: first (50) extends to the All Ranges (M, P and K) of footwear abutment wall (1).

Images