Visualization of the inclination of the big toe of a foot in a shoe

Abstract

Device for visualizing the inclination of the big toe of a foot in a shoe, in particular a child's foot in a child's shoe, with - an insert element (10) in the form of an insole (12) having a front toe position marking section (14) for support by the toes of a foot, - wherein the toe position marking section (14) of the insert element (10) is automatically color-changeable at least in the area provided for the big toe of a foot as a result of direct or indirect contact with the big toe, and - wherein the insert element (10) comprises at least two layers at least in the area of ​​the big toe, wherein the lowest layer of the at least two layers is an insole (12) for the shoe and one of the upper layers has the toe position marking section (14), characterized in that - that the insert element (10) has, at least in the area of ​​the big toe, a piezochromic material (40) which changes reversibly under the action of pressure.

Description

The invention relates to a device for visualizing the inclination of the big toe of a foot in a shoe, in particular of a child's foot in a child's shoe. This involves checking whether the large toe of a child's foot in a child's shoe is inclined due to too small a size, i.e. is pushed outwards. The invention further relates to the use of the device for visualizing the inclination of the big toe of a foot in a shoe and to the method for producing the device.The problem of the "stamped up" shoe is generally known, i.e. shoes are not rarely smaller than the size indicated on them, which has an effect either immediately or after a short period of wearing. While adults note that a shoe is too small when tested, in particular small and infant garden children are unable to feel this. This is because their nerves are not yet fully formed, which is why children's feet, unlike adult feet, are relatively insensitive to pressure or pain. Moreover, their bones are soft and thus more easily deformable.Methods or devices for controlling the fit of a shoe are known from the prior art. Most methods are methods for static measurement, i.e. the measurement must be carried out in the resting state, which means, however, that it is not possible to determine an inclination of the large toe during the movement as a result of excessively small size or incorrect fit (e.g. even if too far).In the "thumb sample" measurement method, it is checked by pressing on the shoe tip of the standing child whether the thumb fits between the longest toe and the edge of the outsole. In this case, the foot would have sufficient clearance and the shoe would then be large enough. This method is not reliable, however, since children reflexively contract the toes under thumb pressure, and thus a free space not actually present is suggestived in front of the toes. Furthermore, low flexibility shoe materials and outsoles which have become increasingly raised in the meantime lead to the fact that pressing down the toe caps and thus scanning of any free space is almost impossible.Another static method is the production of a measurement template. The child's foot is placed on an arc and the outline of the foot is reproduced. For roll-off and growth it is recommended that a treatment of mind be added before the toe region. 12 to max. 15-17 mm. After the cutting out, the template thus produced is to be introduced into the shoe. If this is no longer possible, the shoe is too short / narrow, it is possible for there to be sufficient space in the shoe for the children's feet for the rolling-off during the movement and for further growth. A disadvantage of this method is, in addition to the imprecision in the retraining of the foot, that the recording of the addition is usually very rectangular and, as a result of the resulting shape of the front template edge, it does not fit into a shoe whose tip is not rectangular, but rather cut faithfully to the natural shape of the toe, i.e. going back from the grobous toe to the small toes.By placing the infant's foot on the removable insole it can also be determined whether there is still sufficient space in front of the toes for rolling and growth of the foot (i.e. the above mentioned 12 to max. 15-17 mm). However, during the checking of fit with the aid of the insole in shoe business practice, the heel is positioned both at a different distance from and flush with the rear insole edge, so that the results can be of different levels.In contrast to the aforementioned static methods, the method for producing a transparent test shoe according to DE 19 945 019 A1 represents a measurement method for dynamic measurement which makes it possible to measure the foot in the moving state. The transparency of the upper material makes it possible to check whether the rear foot remains in the heel region of the test shoe during walking with the test shoe. If it is found during this check that the feet slide forward and thus the toes are compressed, a narrower shoe must be selected. In this method, it might be difficult to perceive the position of heels, toes and also the orientation of the latter with the naked eye when running in the sense of races.DE 41 32 796 C2 discloses the use of a chemical pressure-indicating coating on a carrier material for producing foot impressions.DE 37 11 539 A1 shows an impression set with a donor sheet having a color-donating coating and a receiver sheet, wherein a colored impression image is formed on the receiver sheet when the impression set is acted upon and the receiver sheet and the donor sheet are subsequently separated.EP 1 759 605 A2 discloses a ventilation insert for ventilating textiles or shoes, wherein the absorber layer comprises a hydrochrome or thermochromic dye.DE 299 22 296 U1 shows an insole for shoes with a shaped body which has a releasable perfume substance.The object of the invention is to create a reliable instrument with easy handling compared to the different approaches from the prior art, which instrument reproduces the movement behavior, i.e. the dynamics of the process "walking, running, running and jumping", in order to find out whether there is so much space in front of the toes in a shoe that the big toe remains aligned or is not pushed away.To achieve this object, the invention proposes a device for visualizing the oblique position of the big toe of a foot in a shoe, in particular of a child's foot in a child's shoe, wherein the device is provided withan insert having the shape of an insole and having a front toe position marking portion for resting by the toes of a foot,wherein the toe position marking portion of the insert element is automatically color-changeable at least in the area provided for the big toe of a foot due to the direct or indirect contact with the big toe,wherein the insert element comprises at least two layers at least in the region of the large toe, wherein the lowermost layer of the at least two layers is an insole for the shoe and one of the upper layers has the toe position marking section, andwherein the insert element (10) has a piezochrome material (40) at least in the area of the large toe, which reversibly changes under the action of pressure.Furthermore, the invention achieves the object by using a material which changes in colour automatically in the case of direct or indirect contact with the toe of a foot when wearing a shoe as a constituent of an insert element which has an insole as the lowermost layer and a ten-position marking section as one of the upper layers, for the shoe for marking the position of the toe of the foot according to Claim 6, and the method for producing a device for visualizing the oblique position of the large toe of a foot in a shoe, in particular of a child's foot in a child's shoe according to Claim 6.Accordingly, the invention proposes a device for visualizing the oblique position of the big toe of a foot in a shoe, which device comprises an insert element which has the form of an insole. Thus, the present invention is relevant both for shoes with and for shoes without an insole supplied and pulled out by the manufacturer. At least in the area of the big toe, the insert element is provided with a marking section, called a toe position marking section, comprising the piezochrome material, which has the property of changing colour automatically on contact with the big toe or with the stocking on the big toe.It is important in this connection that the position marking section is as thin as possible, namely, it takes up the thickness of a film or of a sheet, in order to ensure that the space in the shoe defined for the foot is not restricted thereby and that the measurement result is not adulterated as a result.According to the invention, it is also important for reasons of convenience that no additional color is supplied from the outside, as a result of which the foot, the stocking or the inside of the shoe are soiled, but that the device itself has the property of automatically producing a color print upon contact with the toe or with the tighted toe.In a preferred embodiment of the invention, the insert element does not comprise an insole, but a lower layer at least in the region of the position marking section, the side of which facing the inner contact surface of the shoe is provided with the aid of adhesive strips or pressure-sensitive adhesive (for example self-adhesive films or self-adhesive sheets) in order to fasten the insert element to the inner contact surface of the shoe in a slip-proof manner. Alternatively, the lower side of the insert element can be provided with needle-shaped elevations in the form of shaped closures in order to ensure a shear-resistant connection to the inner bearing surface of the shoe.The piezochrome material changes reversibly in color under the action of pressure. The reversible colour change has the advantage that the insert element can be used repeatedly, while the irreversible colour change can be used when relatively long time has to be used for the assessment of the inclination of the toe. A transparent cover layer is preferably to be placed over the piezochrome film as a protective layer.In the device according to the invention, a material which changes in colour automatically in the case of direct or indirect contact with a toe of a foot when wearing a shoe is thus used to mark the position of the toe as a component of an insert element for the shoe. The color-changing material is piezochrome.According to the invention, a method for producing a device for visualizing the oblique position of the large toe of a foot in a shoe, in particular of a child's foot in a child's shoe, is proposed, wherein first the upper layer, which contains the piezochrome material changing in color, is cut to size at least in the toe position marking section according to the shape of the insole of the shoe, and subsequently the cut-to-size layer is fastened to the existing insole of the shoe in a slip-proof manner by means of releasable adhesive strips.Accordingly, the invention first places the removable insoles belonging to a pair of children's shoes and supplied at the manufacturer's side on a sheet or a film containing the piezochrome material changing in colour, and reproduces the edge of the approximately upper third of the insole with a pin at least in the region of the toes. The mold is then cut out along the lines so drawn and glued onto the corresponding insole with double-stick tape and any protruding contours are re-cut. Subsequently, the manufactured insert elements are introduced into the shoes, which are slowly donned and well closed by the child, at best with the aid of an adult. The child stands up, immediately runs loose, runs around, and is then immediately seated back down to slowly extend the shoes. The adult takes the insert from the shoes and judges whether the color prints of the big toe are straight.If this is not the case, the shoe is either too short or too far, with the consequence that the toes are not held and compressed, so that it should be taken from this distance.The invention is explained in more detail below with reference to several exemplary embodiments and with reference to the drawings. However, these embodiments shown should not be interpreted as limiting the scope and with respect to the details of the invention. The features apparent from the figures are not limited to the individual embodiments in each case. Rather, these features can be combined with other features indicated in the figures and / or in the description including the description of the figures to form further developments that are not shown in more detail. In detail, the following show: FIG. 1 is a plan view of the device for illustrating the basic construction, FIG. 2 is a greatly enlarged view of the cross section of the insert in the direction of the arrow II--X of FIG. 1 in an embodiment not according to the invention, with a layer of ink liquid containing ink capsules in the position marking section, which is fastened on an insole, FIG. 3 is a greatly enlarged view of the cross section of the insert in the direction of arrow II--X of FIG. 1 in an embodiment not according to the invention, with a writing paper in the position marking section, which is fastened on an insole, FIG. 4 is a greatly enlarged view of the cross section of the insert in the direction of the arrow II--X of FIG. 1 in an embodiment with a piezochomic film in the position marking section, which is fastened on an insole, FIG. 5 is a greatly enlarged view of the cross section of the insert in the direction of the arrow II--X of FIG. 1 in an embodiment with a piezochomic colored layer in the position marking section, which is fastened on an insole, FIG. 6 is a greatly enlarged view of the cross section of the insert in the direction of the arrow II--X of FIG. 1 in an embodiment with a piezochomic material in the position marking section, which is fastened on an insole, FIG. 7 is a greatly enlarged view of the cross section of the insert element in the direction of the arrow II--X of FIG. 1 in an embodiment not according to the invention with a layer of paint liquid containing paint capsules in the position marking section, which is fastened on the inner bearing surface of the shoe, FIG. 8 is a greatly enlarged view of the cross section of the insert member taken in the direction of arrow II--X of FIG. 1 in an embodiment not according to the invention, with a writing paper in the position marking portion mounted on the inner bearing surface of the shoe, FIG. 9 is a greatly enlarged view of the cross section of the insert element in the direction of the arrow II--X of FIG. 1 in an embodiment with a piezochomic film in the position marking section, which is fastened on the inner bearing surface of the shoe; and FIG. 10 is a greatly enlarged view of the cross section of the insert element in the direction of the arrow II--X of FIG. 1 in an embodiment with a piezochrome material in the position marking section, which is fastened on the inner bearing surface of the shoe.FIG. 1 shows a top view of the insert element 10, which has the shape of an insole 12. In the area of the toes, the insert element 10 is provided with the toe position marking section 14.FIGS. 2 to 10 are greatly enlarged views, not necessarily true to scale, of the cross section of the insert 10 in the region of the position marking section 14.In FIGS. 2 to 6, greatly enlarged views of the cross section of the insert element 10 with insoles 12 in the region of the position marking section 14 in the direction of the arrow II-X of FIG. 1 are shown on several embodiments.FIG. 2 shows a greatly enlarged view of the cross section of the insert element 10 in the region of the position marking section 14 in the direction of the arrow II-X of FIG. 1 on the exemplary embodiment of a paint liquid layer 24 containing paint capsules 16, which is not according to the invention. In the ink liquid layer 24 are ink capsules 16 containing ink liquid 18 and covered by an absorbent display layer 26. These paint capsules 16 burst under the action of pressure and thus release paint to the display layer 26. Furthermore, the uppermost cover layer 22, which rests on the display layer 26, should on the one hand be made transparent, so that a color change can be clearly detected, and on the other hand also serve to prevent any color from getting to the foot or the stocking on the foot and thus soiling it. The lower base layer 20 is ink impermeable and is intended to prevent the insole from being stained with ink. By means of adhesive strips 28, the position marking section 14 is fastened to the insole 12.FIG. 3 shows a greatly enlarged view of the cross section of the insert element 10 in the region of the position marking section 14 in the direction of the arrow II-X of FIG. 1 on the exemplary embodiment of a writing paper 30 which is not according to the invention. the writing paper 30 comprises a cover sheet with a coated rear side and a display sheet 34 located under the cover sheet 32, wherein the two sheets are detachably connected to one another. The writing paper 30 is secured by means of adhesive strips 28 on the insole 12 so as to be secure against slipping. The lower side of the topsheet 32 may be coated with carbon or chemicals. Under pressure, a toe impression is created by the transfer of the carbon paint or by reaction of the chemicals to the display sheet 34.FIG. 4 shows a greatly enlarged view of the cross section of the insert element 10 in the region of the position marking section 14 in the direction of the arrow II-X of FIG. 1 on the exemplary embodiment of a piezochrome film 36, which is likewise fastened on the insole 12 in a slip-proof manner by means of adhesive strips 28, provided it is not self-adhesive. As described above, a transparent cover layer 22 can be applied over the piezochrome film 36 as a protective layer against scratching and soiling of the film 36. Under the action of pressure or temperature, an impression of the toes can be produced which can be reversible. Instead of the piezochrome foil 36, piezochrome material can also be used.FIG. 5 shows, in greatly enlarged fashion, the view of the cross section of the insert element 10 in the region of the position marking section 14 in the direction of the arrow II-X of FIG. 1 on the exemplary embodiment of a piezochrome ink layer 38 which is attached on the insole 12 at the factory.FIG. 6 shows a greatly enlarged view of the cross section of the insert element 10 in the region of the position marking section 14 in the direction of the arrow II-X of FIG. 1 on the exemplary embodiment of a piezochrome material 40 In this case, in contrast to the examples mentioned previously, the insert element 10 is no longer divided into at least two layers, but instead is completely made of piezochrome material 40 at least in the region of the position marking section 14.The embodiment variants shown in FIGS. 5 and 6 can be of particular interest to the shoe producer who produces the insert element 10 and makes it available to the shoe sales person in retail sales for checking or determining the correct fit during sale of the shoe.In contrast to FIGS. 2 to 6, FIGS. 7 to 10 show the insert element 10 without an insole 12, but with direct contact with the inner contact surface of the shoe 13. On the side of the insert element 10 facing the inner contact surface of the shoe 13, there is at least in the region of the toe position marking section 14 a fastening layer 29 which has adhesive strips, pressure-sensitive adhesives or shear-resistant form-fit fasteners in order to position the insert element 10 in the shoe in a slip-proof manner.FIG. 7 shows, analogously to FIG. 2, a greatly enlarged view of the cross section of the insert element 10 in the region of the position marking section 14 in the direction of the arrow II-X of FIG. 1 on the exemplary embodiment of a paint liquid layer 24 which contains paint capsules 16 and is not according to the invention.FIG. 8 shows, analogously to FIG. 3, a greatly enlarged view of the cross section of the insert element 10 in the region of the position marking section in the direction of the arrow II-X of FIG. 1 on the exemplary embodiment of a writing paper 30 which is not according to the invention.FIG. 9 shows, analogously to FIG. 4, a greatly enlarged view of the cross section of the insert element 10 in the region of the position marking section in the direction of the arrow II-X of FIG. 1 on the exemplary embodiment of a piezochrome film 36.FIG. 10 shows, analogously to FIG. 6, a greatly enlarged view of the cross section of the insert element 10 in the region of the position marking section in the direction of the arrow II-X of FIG. 1 on the exemplary embodiment of a piezochrome material 40.List of reference characters10 Insert element 12 Insole 13 Inner bearing surface of the shoe 14 Position marking section 16 Ink capsules 18 Ink liquid 20 Base layer 22 Covering or protective layer 24 Ink liquid layer 26 Display layer 28 Adhesive strip 29 Fastening layer with adhesive strip, pressure-sensitive adhesive or shear-resistant form-fit elements 30 Writing paper 32 Cover sheet with coated rear side 34 Display sheet 36 Piezochrome film 38 Piezochrome ink layer 40 Piezochrome material

Claims

Device for visualizing the inclination of the big toe of a foot in a shoe, in particular of a child foot in a child shoe, having - an insert element (10) having the form of an insole (12), which has a front toe position marking section (14) for resting through the toes of a foot, - wherein the toe position marking section (14) of the insert element (10) can be automatically changed in color at least in the area provided for the big toe of a foot as a result of the direct or indirect contact with the big toe, and - wherein the insert element (10) comprises at least two layers at least in the area of the big toe, wherein the lowermost layer of the at least two layers is an insole (12) for the shoe and one of the upper layers has the toe position marking section (14), characterized in that, the insert element (10) has a piezochrome material (40) at least in the area of the large toe, which reversibly changes under the action of pressure.Device according to claim 1, characterised in that the insert element (10) comprises at least two layers at least in the region of the large toe, wherein the lowermost layer is a fastening layer (29) for fastening the insert element (10) to the inner bearing surface of the shoe (13) in a slip-proof manner and one of the upper layers has the toe position marking section (14).Device according to one of the preceding claims, characterized in that the uppermost layer has a transparent covering layer (22) as protective layer.Device according to claim 1, characterised in that the two layers are connected to one another in a releasably slip-proof manner, in particular by at least one adhesive strip (28) and / or pressure-sensitive adhesive and / or a releasable shear-resistant form closure.Device according to claim 2, characterised in that the fastening layer of the insert element (10) has at least one releasable adhesive strip (28) and / or a releasable pressure-sensitive adhesive and / or a releasable shear-resistant form closure.Method for producing a device according to claim 1 for visualizing the oblique position of the big toe of a foot in a shoe, in particular of a child's foot in a child's shoe, comprising the following method steps: - cutting the upper layer, which contains the piezochrome material that changes reversibly in color, according to the shape of the insole (12) of the shoe, at least in the toe position marking section (14), and - fastening the cut-to-e layer in a slip-proof manner by means of at least one detachable adhesive strip (28) and / or one detachable pressure-sensitive adhesive and / or one detachable shear-resistant form fit onto the existing insole (12) or the inner contact surface of the shoe (13).

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