DE102018118255A1 - Shoe with boarding aid and method for manufacturing a shoe with boarding aid - Google Patents

Abstract

The invention relates to a shoe with boarding aid and a method for producing a shoe with boarding aid, wherein the shoe has a shoe upper, an insole and a shoe sole as well as a bistable bending jump unit with two stable states arranged in the area of a bending point of the insole and a bending point of the shoe sole correspond to a closed or open state of the shoe.

Description

The invention relates to a shoe with boarding aid and a method for producing a shoe with boarding aid, wherein the shoe automatically assumes an open state when a bending moment is applied, which is aimed at opening the shoe, and, on the other hand, when a restoring torque is exerted on a Closing the shoe is directed, automatically returns to a closed state.

The EP 1 443 834 B1 describes a shoe with a sole, an upper and a bistable element which defines a first and second stable state, the shoe having an open or closed state due to the bistable element. The shoe can be converted from the open to the closed state by stepping on it and can be easily opened by holding the heel with the other foot and pulling the foot up or by stepping on an edge, for example, while simultaneously arching the bistable element.

From the DE 2009 023 689 B4 , which is hereby incorporated by reference, a shoe is known which, by means of a bistable leaf spring arrangement, forms an opening and closing mechanism for the shoe, in which an actuating edge presses on the bistable leaf spring near its apex, so that even with a small deformation of the bistable leaf spring the switching process is initiated in the region of its apex, in which the insole bends around a bending point and the upper shoe or shoe upper can be opened or closed. This makes it possible to get out of the shoe with little effort, while walking safely when the shoe is closed is possible without the shoe jumping open.

It is an object of the invention to provide a shoe with an entry aid and a manufacturing method for such a shoe, the shoe being optimized in such a way that it can have various common insoles, for example a solid insole that is glued or nailed to a twisted shaft, but also a soft insole that can be sewn to a shaft using a strobe seam. Another aspect of the task is to optimize the function and durability of a shoe with entry aid.

The object is solved by the subject matter of the independent claims. Advantageous refinements and developments are the subject of the dependent claims.

A shoe with an entry aid is specified, which comprises an upper with an upper and insole, a shoe sole and a bistable bending jump unit, which is arranged in particular between the insole and the shoe sole.

The upper, insole and sole each have at least two parts that can move with respect to one another: the upper with the heel and the front of the shaft, which can be moved against each other; furthermore, the insole has an insole heel part and an insole front part which can be moved against one another at a bending point; and finally, the sole of the shoe also has the sole heel part and the front part of the sole, which are mutually movable at a bending point. The shoe upper, insole and / or shoe sole can each be formed in two parts by the bending point being formed as a distance, or in one piece by the bending point being formed as a flexible material.

In the area of the bending point of the insole and at the same time in the area of the bending point of the shoe sole, in particular between the insole and the shoe sole, there is a bistable bending jump unit with a bistable leaf spring set up to switch between two stable states and a housing which at least partially surrounds the leaf spring.

A first release means is arranged on the housing of the bending jump unit in such a way that, when a bending moment acts on the bending jump unit, it exerts pressure on a first side of the leaf spring in order to trigger the leaf spring to jump over, so that the bending jump unit jumps from a stable first state into a stable second state passes over and puts the shoe in an open state.

In addition, a second release means is arranged on the housing of the bending jump unit in such a way that, when a restoring torque acting on the bending jump unit acts opposite to the bending moment, it exerts pressure on a second side of the leaf spring opposite the first side in order to trigger a jumping over of the leaf spring, so that the bending jump unit of suddenly returns to the stable first state and puts the shoe in a closed state.

The term bistable leaf spring means in particular any bistable element which can switch between two stable states by exerting pressure on opposite sides of the bistable element.

With the bistable bending jump unit, on the housing of which both a first and a second release means are arranged, a Independent opening and closing mechanism for a shoe is formed, which is both compatible with firm insoles, which can be glued or nailed to a gusseted shaft, and with soft insoles, which can be sewn to a shaft by means of a strobe seam. While with a firm insole the bending point can be designed, for example, as a gap or as a bridging elastically deformable material, a soft insole can be formed in one piece and, by virtue of its own flexibility, form the bending point. In other words, the insole can be designed to be completely flexible and thus have no hard and / or rigid material.

The bistable bending jump unit arranged between the insole and the shoe sole is advantageously designed as a separate component which has release means for the leaf spring to spring around both for the bending direction and for the reverse return direction. The bending step unit can advantageously be fastened as a separate component to both a firm and a soft insole. In particular, the bending jump unit is shorter than the insole with respect to the longitudinal direction of the shoe and can be fastened to the insole from below in the region of the bending point. The bending step unit can e.g. have a length with respect to the longitudinal direction of the shoe which is less than three quarters of the length of the shoe or less than two thirds of the length of the shoe or also less than half the length of the shoe.

In order to arrange the bistable bending jump unit between the insole and the shoe sole, a recess can be provided in the shoe sole which serves to receive the bistable bending jump unit. In the case of a one-piece shoe sole, the recess can extend both into the sole heel part and into the sole front part. In this case, underneath the recess, e.g. where the usual shoe heel ends, there is a thinned sole area, which forms the bending point between the heel part of the sole and the front part of the sole. In the case of a two-part shoe sole in which the sole heel part and the sole front part are completely separated from one another, recesses can be provided both in the sole heel part and in the sole front part, each of which accommodates the bending jump unit in part.

Increased comfort can also be achieved with the housing, which at least partially surrounds the leaf spring on both sides. In particular, the housing can have a damping effect and / or can additionally be provided with a damping material from the outside, so that the wearer of the shoe is less aware of the leaf spring jumping over.

The housing of the bending jump unit preferably comprises a rear housing part and a front housing part, it being possible for the two housing parts to be constructed identically and / or symmetrically. A first and a second release means are arranged on both the rear and the front housing part. The two housing parts are movable relative to one another in particular by the action of the bending moment or the restoring moment, preferably in a hinge-like manner at a gap which forms a distance between the two housing parts.

The housing of the bending jump unit preferably forms the first triggering means and / or the second triggering means integrally, preferably as the edge of the housing. In other words, the housing and triggering means are preferably made in one piece and made of the same material. In the case of a housing with a rear and a front housing part, the rear and the front housing part in particular form a first and / or a second triggering means integrally, preferably as edges of the housing, which preferably face the gap.

The housing of the bending step unit preferably forms an opening for receiving the leaf spring with a peripheral wall, which is preferably formed integrally, ie in one piece. The circumferential wall has a first wall section on the first side of the leaf spring and an opposite second wall section on the second side of the leaf spring, the first and second wall sections having or forming the first and second triggering means, preferably as the inner edge of the wall. In particular, the first and second wall sections are connected to one another via lateral wall sections. In the case of a housing with a rear and a front housing part, in particular the rear housing part and the front housing part each form such a wall with one another and preferably the openings facing the gap for receiving the leaf spring.

The leaf spring of the bending jump unit preferably has a plate-like end which is held in a form-fitting manner in a socket section of the housing which preferably faces away from the opening of the housing. In the case of a housing with a rear and a front housing part, the leaf spring has in particular two plate-like ends, which are each held in a form-fitting manner in such a socket section of the rear or front housing part that preferably faces away from the opening and the gap.

The leaf spring of the bending step unit preferably has between its ends Functional intermediate piece, in particular with at least one arch leg and / or a folding leg. The functional intermediate piece of the leaf spring is at least partially arranged in a functional section of the housing that preferably faces the opening of the housing. This functional section forms a free space which is required for changing over between the two stable states of the leaf spring, preferably as small as possible. In the case of a housing with a rear and a front housing part, the functional intermediate piece of the leaf spring in particular is at least partially arranged in such a functional section of the rear or front housing part that preferably faces the opening and the gap.

In a preferred embodiment, the housing of the bending step unit, in particular in each case the rear and front housing part, has a projection in order to fix the bending step unit arranged between the insole and the shoe sole. Furthermore, as explained above, the shoe sole can have a recess for the bending step unit, so that the bending step unit can be let into the recess, which likewise results in a fixation.

The bending jump unit arranged between the insole and the shoe sole can be attached to the insole and / or to the shoe sole, preferably by gluing, screwing and / or riveting, in particular by the housing and / or a plate-like end of the leaf spring on the insole and / or is attached to the sole of the shoe.

In the case of a housing with a rear and a front housing part, the rear housing part and / or a plate-like end of the leaf spring accommodated therein can be fastened to the insole heel part and / or the sole heel part, preferably by gluing, screwing and / or riveting. Furthermore, the front housing part and / or a plate-like end of the leaf spring accommodated therein can be fastened to the insole front part and / or the sole front part, again preferably by gluing, screwing and / or riveting.

It can be provided that the rear housing part and / or a plate-like end of the leaf spring accommodated therein is fastened to the insole heel part, in particular at its extreme end facing away from the opening and preferably the gap, by rivets or screws, in particular is only fastened there. It can further be provided that the front housing part and / or a plate-like end of the leaf spring accommodated therein is in each case fastened at its outermost end facing away from the opening and preferably the gap on the insole front part by rivets or screws, in particular is only fastened there ,

The leaf spring of the bending jump unit can have openings through its plate-like ends in order to fasten the leaf spring by rivets or screws, wherein such an opening is preferably provided in each case through the outermost ends of the two plate-like ends.

Furthermore, the leaf spring of the bending jump unit can have openings, in particular in its plate-like ends, in order to vary the bending moment and / or the restoring moment for the leaf spring to jump around, in particular to increase this, preferably at least two openings in each case through regions of the plate-like ends facing the functional intermediate piece are provided.

The invention further relates to a bistable bending step unit which can assume a stable first state and a stable second state and which can be jumped from the first state to the second state by a bending moment and which can be jumped from the second state to the first state again by a restoring torque opposite the bending moment. especially for a shoe described above.

The bistable bending jump unit comprises a bistable leaf spring that can switch between two stable states and a housing that at least partially surrounds the leaf spring and that has a first triggering means on a first side of the leaf spring and a second triggering means on a second side of the leaf spring.

The first triggering means is arranged on the housing in such a way that, when a bending moment acts on the bending step unit, the first triggering means presses on the first side of the leaf spring in such a way that the leaf spring jumps over, so that the bending step unit changes from its first state to its second state.

The second release means is arranged on the housing in such a way that, when a restoring moment opposite to the bending moment acts on the bending jump unit, the second release means presses on the second side of the leaf spring, in such a way that the leaf spring springs over, so that the bending jump unit changes from its second state into its own First state returns.

The bistable bend-jump unit can also have one or more of the features described above in connection with the shoe.

The invention also relates to a housing for a bistable bending step unit for receiving a bistable leaf spring, in particular as described above in connection with the bistable bending step unit or the shoe.

The housing comprises a first release means, which is arranged on a first side of the housing such that, when the leaf spring is accommodated in the housing, it exerts pressure on a first side of the leaf spring at a bending moment, so that the leaf spring is stable from a first State jumps to a second stable state.

Furthermore, the housing comprises a second triggering means, which is arranged on a second side of the housing opposite the first side in such a way that, when the leaf spring is accommodated in the housing, at a restoring torque opposite to the bending moment, it exerts pressure on a second side opposite the first side exerts the leaf spring, so that the leaf spring jumps back from the second stable state to the first stable state.

The housing can also have one or more of the features described above in connection with the bistable bending jump unit or with the shoe.

Furthermore, the invention relates to a method for producing a shoe, in particular a shoe described above.

A first method step is the provision of a shoe upper, an insole and a bistable bending step unit, in particular a bistable bending step unit, as described above. A second method step is to attach a shoe sole to the shoe upper, the insole and / or the bistable bending jump unit.

In a first variant of the method, a shoe sole is provided. Furthermore, the shoe sole is attached to the shoe upper, the insole and / or the bistable bending step unit by gluing the shoe sole to the shoe upper, the insole and / or the bistable bending step unit.

In a second variant of the method, liquid shoe sole material is made available. Furthermore, a cover for closing open areas of the bending step unit and / or the insole is preferably arranged in order to prevent the entry of liquid shoe sole material. The shoe sole is attached to the shoe upper, the insole, the cover and / or the bistable bending jump unit by feeding the liquid shoe sole material into a sole shape and to the shoe upper, the insole, the cover and / or the bistable bending jump unit.

Finally, the invention also relates to a shoe which can be produced or produced using the method described above.

The invention is explained in more detail below on the basis of exemplary embodiments and with reference to the figures, wherein the same and similar elements are partially provided with the same reference numerals and the features of different exemplary embodiments can be combined with one another.

list of figures

• 1 shows a shoe with a shell sole as an exploded view,
• 2 shows a shoe with a directly soled sole as an exploded view,
• 3 shows a bistable bending jump unit as an exploded view,
• 4 shows the top of the bistable bending jump unit in the closed state,
• 5 shows a sectional view through the bistable bending step unit in the closed state,
• 6 shows the underside of the bistable bending jump unit in the assembled state,
• 7 shows the top of the bistable bending jump unit in the open state,
• 8th shows a sectional view through the bistable bending jump unit in the open state,
• 9 shows a leaf spring in the closed state,
• 10 shows the leaf spring in the open state,
• 11 shows a sectional view of a further embodiment of a bistable bending step unit

1 shows a shoe with an upper 5 , an insole 2 , a bistable bending jump unit 4 and a shoe sole 1 , In this example the insole is 2 with the upper 5 through a strobing seam 53 sutured. The upper part 5 includes a shaft and heel part 51 and a shaft plate or shaft front part 52 that overlap and are movable against each other. The insole 2 is formed in one piece in this example, but comprises two parts, namely an insole heel part 21 and insole front 22 that are movable against each other because of the insole 2 is designed to be flexible overall, and thus in particular at the bending point 23 is flexible. With in other words, the insole is in this example 2 not made of a relatively hard or rigid material and need not have a gap. The sole of the shoe 1 also has two parts, namely sole-heel part 11 and sole front part 12 on that are mutually movable, the shoe sole 1 at least at the bending point 13 is flexible. In this example the bending point is 13 designed as a thinned sole area, the heel part 11 and front part 12 connects with each other.

Between the insole 2 and shoe sole 1 there is a bistable bending jump unit 4 which is attached to the insole, in this example by means of rivets 40 , Because the bend-jump unit 4 has a certain thickness is in the shoe sole 1 a recess 14 incorporated both in the heel area 11 as well as in the front area 12 extends into it and to accommodate the bending step unit 4 serves.

The sole of the shoe 1 can be produced as a molded part or in another way and, as shown, can be formed in one piece, but can also be formed in several parts. In the example shown, it is a so-called shell sole that encloses the shaft like a shell and with parts of the shaft 5 , the insole 2 and the bend-jump unit 4 is glued. The sole 1 is thus a prefabricated part which is connected to the other parts of the shoe in a suitable manner to produce the shoe.

In the finished shoe with the built-in bending jump unit 4 is a shoe with boarding aid. Such a shoe can be worn like a normal shoe, ie there is practically no difference when walking. However, there is relief when putting on and taking off. For putting on and taking off the shoe can namely be opened by the bending jump unit 4 is placed in a stable bending state as in 7 and 8th you can see. This causes the insole to bend 2 along the bending point 23 and the sole of the shoe 1 along the bending point 13 and the heel and front part 51 . 52 of the upper 5 move apart, so that the opening of the shoe increases and the shoe can be put on and taken off.

The flex-jump unit built into the shoe 4 can be brought into the stable bending state by the sole of the shoe 1 and / or the insole 2 around the bending points 13 . 23 be bent by a certain angle. This involves a certain bending moment or a torque around the bending points 13 . 23 exercised as an axis. For example, if you want to get out of the shoe, you can use the sole heel part 11 are held on the floor by loading with the other shoe and a tensile force is exerted on the upper with the foot.

Conversely, a restoring torque opposite to the bending moment can be applied to the bending points 13 . 23 the sole of the shoe 1 and / or insole 2 be exercised to the flex-jump unit 4 to put it in a stable flat state as it is in 4 and 5 you can see. As a result, the shoe can be closed, the restoring torque being generated in particular by stepping into the shoe with the foot.

2 shows a direct soled shoe with boarding aid. Apart from the differences described below compared to the shoe with a shell sole described above, it preferably has the same features and properties as the shoe described above.

One difference in particular is the manufacturing process using direct soling. The step of gluing can be omitted and the sole can be injected directly under the shaft and the insole during its manufacture. With this method, the tool costs are typically higher, the unit costs are generally lower, since there is no need to manually glue the sole to the upper.

In order to manufacture a shoe with direct access to it with direct soling, it can be advantageous to have a cover 54 to be provided from an elastic material, as in 2 you can see. This means that open areas can be closed. With direct soling, there are openings in the insole 2 and in the flex-jump unit 4 towards the sole 1 with a cover 54 closed from elastic material.

If the insole 2 with a gap as a bending point 23 is formed, this gap can thus preferably be closed in order to prevent liquid plastic from flowing through the gap in the insole into the interior of the shaft during direct soling. An elastic material can be used to compensate for the increase in the gap that occurs when the shoe is opened without blocking the movement.

Furthermore, the bending jump unit 4 or the housing of the bending jump unit 4 a crack 45 have, such as in 4 you can see. Here, too, plastic can be prevented during direct soling through the gap between the front housing part 42 and the rear housing part 41 flows in and thereby the free spaces 44 which fills the leaf spring 3 needed in the two stable states. The closure of the gap 45 An elastic material can also be used between the housing parts, since a length change can also occur here when the bending step unit is bent.

Furthermore, the housing parts 41 . 42 be provided in particular on their underside with openings or openings which the leaf spring 3 disclose like this in 6 you can see. Then the plastic can penetrate into the free spaces 44 can be prevented by closing these openings or openings.

The in 2 The shoe shown has a multi-part, here two-part sole at which the bending point 13 is formed by a gap. However, a one-piece sole can also be formed in the direct-soled shoe. Even in the case of the shoe produced by fastening, in particular gluing, a finished sole, the sole can be in one or more parts. In the case of a two-part sole, it is conceivable that the two sole areas in the area of the bending point 13 be connected to each other by means of an elastic material.

The 3 to 8th show the bistable bending jump unit already mentioned above 4 that have a rear and a front housing part 41 . 42 can have one another through a gap 45 are spaced and are movable against each other like a hinge. The housing parts 41 . 42 which can be made of plastic or metal, for example, enclose a typically metallic leaf spring 3 , which can assume two stable states and will be described in more detail below. It can also be provided that the housing comprises a spring assembly comprising a plurality of leaf springs, in particular stacked one above the other 3 encloses.

The housing parts 41 . 42 the bistable bending jump unit 4 are designed so that both lower release edges 41B . 42B as well as upper release edges 41A . 42A form. In other words, a housing part forms a release edge on its top and on its bottom. These release edges each serve to cause the leaf spring to snap around 3 between their two stable states. The housing parts 41 . 42 enclose the leaf spring 3 , in particular form-fitting, the free spaces required by the leaf spring in its two stable states 44 be kept free. The freedom 44 are kept as small as possible. The housing parts 41 . 42 are designed so that the overall height of the bending jump unit 4 remains low to enable use in flat soles. The required freedom 44 are kept small. Thus, when a force is applied, there is a contact between a release edge 41A . 41B . 42A . 42B and the leaf spring 3 ,

The leaf spring 3 then preferably does not react elastically, but remains stiff until the release force is reached, which improves the function of the shoe. The housing 41 . 42 achieves high rigidity by the release edges of a housing part 41 respectively. 42 are connected on both sides. On the housing part 41 becomes one at the release edge 41A The force introduced laterally also over the release edge 41B intercepted. Due to the lateral connection of the top and bottom, the release edges hardly react elastically when force is applied.

As already described above, insoles are 2 , Bending jump unit 4 and shoe sole 1 preferably glued to each other, since they absorb the forces that occur when the leaf spring springs over 3 transfer. To apply force to the bending unit 4 towards the sole 1 and to the insole 2 have to improve the housing parts 41 . 42 over a cantilever 43 , The cantilever 43 can especially the adhesive surface with sole 1 and insole 2 enlarge. The cantilever is in the assembled state 43 of the housing parts 41 . 42 between sole 1 and insole 2 ,

Due to the particularly identical housing parts 41 . 42 which is the leaf spring 3 enclose positively on the side and also preferably in an adhesive bond with sole 1 and insole 2 stand (and preferably in combination with the fixation, for example by riveting 40 breakthroughs 3B) can twist the shaft parts 51 . 52 be prevented. Including the housing 41 . 42 in the recess 14 counteracts twisting. Such an anti-rotation device is advantageously still guaranteed even if the fastening points (eg rivets 40 ) are reduced, so that in particular, for example, only one fastening point is provided per housing part, which could otherwise be associated with the loss of the anti-rotation lock.

Through the shoe according to the invention with a bending jump unit 4 , which forms upper and lower trigger means (trigger edges), it is in particular not necessary that the insole 2 even forms trigger edges. This is the bend-jump unit 4 Can be used for various common shoe manufacturing processes.

With a twisted shaft 5 becomes, for example, part of the leather, the so-called surcharge on the underside against the insole 2 is glued or nailed. This process typically comes with a stable insole 2 for use. Twisted shafts, however, are relatively expensive due to the leather surcharge and time-consuming gluing.

The so-called stroking is a cheaper shaft production process. This is the shaft 5 to the insole 2 sewn. As already explained above, this is done by the strobe seam 53 , There are special sewing machines (strobe machines) that can sew such an "angle connection". In this process, the insole is 2 ideally not made of a strong and stiff material, but rather textile. Even with such an insole 2 a flexed shaft can be the bending jump unit 4 connected to get a shoe with boarding aid.

As in the 3 to 8th the leaf spring shows 3 breakthroughs 3B on to the leaf spring 3 on the insole 2 to fix. The housing or the two housing parts 41 . 42 also have holes or breakthroughs around the housing 41 . 42 on the insole 42 to fix. The breakthroughs 3B the leaf spring 3 come to coincide with the holes or openings in the housing when the leaf spring is received in the housing. This makes it possible to attach the leaf spring 3 or the housing 41 . 42 on the insole 2 at the same time the leaf spring 3 relative to the housing 41 . 42 to fix. But it can also be provided that the housing 41 . 42 on the insole 2 attached, for example glued and the leaf spring 3 in turn is attached to the housing so that the leaf spring 3 is indirectly attached to the insole.

Referring to 11 can the housing in particular in the socket section 48 arranged holding elements 48H have in the openings of the leaf spring 3 intervention. The holding elements 48H can be integrally formed with the housing, that is to say, in the case of a plastic housing, can be formed, for example, as plastic clips which extend into the outer opening 3B the leaf spring 3 intervene and fix it to the housing.

The attachment of the bending jump unit 4 or the housing 41 . 42 the bending jump unit 4 on the insole 2 can, for example, with rivets 40 or screws as fasteners. There is preferably at least one fastening element per housing part 41 . 42 or per end of the leaf spring 3 provided so that there are two fastening points per shoe, which may already be sufficient due to the anti-rotation described above.

In practice it has been found that fastening with only two fastening points per shoe can be advantageous, in particular if the fastening points are arranged at the extreme ends of the leaf spring. Under certain circumstances, the leaf spring can be fixed 3 with more than two fasteners and / or at locations from the extreme ends of the leaf spring 3 are removed, for example closer to the functional intermediate piece of the leaf spring 3 lead to problems, such as rivet breakage, which is due to shear loads caused by the bends occurring when walking within the riveted composite of leaf spring 3 , Casing 41 . 42 and insole 2 can be attributed.

It can therefore be provided that the fastening of the housing parts 41 . 42 each with (exactly) one fastening element (e.g. rivet) per insole part 21 . 22 he follows. With this linear arrangement in the longitudinal direction of the shoe, shear stresses can be avoided and the durability can be increased. In particular, the fastening points (for example rivets) are each located at the outer ends of the plate-like ends of the leaf spring 30 , There are openings for fastening here 3B , As a result, the leaf spring can move freely, in particular the plate-like ends 30 move more freely and the release force can be increased.

The fasteners, especially the rivets 40 , can have a diameter that is larger than 3 mm, in particular larger than 4 mm. For example, diameters between 4 mm and 12 mm can be provided, preferably between 4 mm and 8 mm. A diameter of 4.8 mm can be particularly cheap. The fasteners, especially the rivets 40 can be made of metal, for example aluminum, or preferably made of stainless steel. Stainless steel rivets have the advantage of being more resilient.

The attachment described at the extreme ends of the leaf spring 3 , especially through breakthroughs 3B and preferably with only one fastening element per end of the leaf spring has, in addition to the advantages already described with regard to durability, also advantages with regard to function.

In particular, the release force can be increased by fastening (only) to the outermost ends of the leaf spring, in particular with only one fastening element in each case. The release force is the force that is necessary to move the shoe from the open to the closed state. A high release force can be advantageous because the shoe only closes (or opens) when the wearer deliberately builds up pressure.

The increase in release force is related to the fact that the plate-like ends 30 the leaf spring 3 in the two stable states (see 9 and 10 ) may be slightly curved. In other words, the ends 30 the leaf springs 3 through the application of force to the bow legs 34 be slightly deformed in the transverse axis.

When the bow legs jump over 34 the deformation at the ends of the leaf springs 3 change. This movement is in the plate-like ends 30 the leaf spring 3 , for example by riveting 40 at the positions where the breakthroughs are 3A located, blocked, can be inside the leaf spring 3 a tension is created which counteracts the bistable properties and the release forces of the shoe are lower. It can therefore be advantageous to have the leaf spring on the openings 3A not to fasten. Nonetheless, these breakthroughs 3A advantageously influence the tension in the leaf spring and additionally increase the release force. It can therefore be provided that at least one opening in the leaf spring which influences the stresses and is not used for fastening, in particular in a plate-like end 30 , is available. For example, four breakthroughs 3A on each leaf spring on the plate-like ends 30 the leaf spring 30 and near the ends of the bow legs 34 are located. They are advantageous in order to additionally increase the triggering force.

The breakthroughs 3A For example, which can be circular, can have a diameter of more than 3 mm, preferably more than 4 mm. For example, it can be provided that the diameter is between 3 mm and 12 mm or preferably between 3 mm and 8 mm. A diameter of 4.9 mm can be suitable. As a result, the triggering force can in turn be additionally increased and / or the stresses which counteract the bistable effect of the leaf spring can be reduced.

The triggering force of the bistable bending jump unit 4 is preferably higher than 1kg, particularly preferably higher than 6kg, very particularly preferably higher than 8kg and even more preferably higher than 10kg, namely for example 11kg.

9 and 10 show a bistable leaf spring 3 in their two stable states. The leaf spring 3 has plate-like ends 30 , The bistable leaf spring 3 has a medium folding leg 33 and two outer bow legs 34 , The folding leg 33 has five kinks 35 to the leaf spring 30 to give a shortening in length, causing the outer legs 34 Depending on the switching state of the bistable leaf spring, assume an arc shape up or down. As a result of this ripple, the leaf spring takes off 3 a certain spatial height. The housing 41 . 42 therefore shows freedom 44 to keep this height clear. As a result of the inner buckling tension in the arch leg 34 can change this by a pressure, which is generated in particular by a trigger. As described above, in particular edges of the housing are provided which are against an arch leg 34 the leaf spring 3 press so the leaf spring 3 or the bending jump unit 4 jumps. Such a release or actuating edge is preferably arranged such that it presses on or near the apex of the arch leg.

By installing the bistable leaf spring 3 into the bend-jump unit 4 with its bow legs down and its fold legs up in a flat state, the shoe is particularly stable.

LIST OF REFERENCE NUMBERS

1

sole

11

Sole heel part

12

Sole front part

13

Bend of the shoe sole

14

recess

2

insole

21

Insole heel part

22

Insoles front part

23

Bend of the insole

3

leaf spring

3A

breakthrough

3B

Breakthrough for attachment

30

Plate-like ends of the leaf spring

34

bow legs

35

folding legs

4

Bistable bounce unit

40

rivet

41

rear housing part

41A

lower trigger on the rear part of the housing

41B

Upper release means on the rear part of the housing

42

front housing part

42A

lower release device on the front housing part

42B

Upper release means on the front part of the housing

43

projection

44

Free rooms

45

Gap between the rear and front housing part

46

All-round wall

46A, B

First, second wall section

46C, D

Lateral wall sections

47

Opening for receiving the leaf spring

48

capturing section

48H

retaining element

49

function section

5

shoe upper

51

Shank heel part

52

Shaft front part

53

Strobel seam

54

cover

QUOTES INCLUDE IN THE DESCRIPTION

This list of documents listed by the applicant has been generated automatically and is only included for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• EP 1443834 B1 [0002]
• DE 2009023689 B4 [0003]

Claims (18)

Shoe with boarding aid comprehensive: - a shoe upper (5) with a shaft-heel part (51) and a shaft front part (52) which can be moved relative to one another, an insole (2) with a bending point (23) between the mutually movable insole heel part (21) and the insole front part (22), - A shoe sole (1) with a bending point (13) between the mutually movable sole heel part (11) and sole front part (12) and - A bistable bending jump unit (4) arranged in the area of the bending point (23) of the insole (2) and the bending point (13) of the shoe sole (1) with a bistable leaf spring (3) set up for jumping between two stable states and at least one leaf spring partially surrounding housing (41, 42), - A first release means (41B, 42B) is arranged on the housing (41, 42) of the bending step unit (4) such that it exerts pressure on a first side of the leaf spring (3) when a bending moment acts on the bending step unit (4) in order to trigger the leaf spring (3) to jump over, so that the bending jump unit (4) jumps from a stable first state to a stable second state and puts the shoe in an open state and - A second triggering means (41A, 42A) is arranged on the housing (41, 42) of the bending step unit (4) in such a way that when a restoring torque acting on the bending step unit acts opposite the bending moment, pressure is exerted on a second side of the leaf spring opposite the first side (3) exercises to trigger the leaf spring (3) to jump over, so that the bending jump unit (4) jumps from the stable second state back to the stable first state and puts the shoe in a closed state. Shoe after Claim 1 , wherein the housing (41, 42) of the bending jump unit (4) comprises a rear housing part (41) and a front housing part (42), on each of which a first and a second release means are arranged, and wherein the rear housing part (41) and the the front housing part (42) can be moved relative to one another, in particular by the action of the bending moment or the restoring torque, preferably at a gap (45) which spaces the rear housing part (41) from the front housing part (42). Shoe according to one of the Claims 1 or 2 , wherein the housing (41, 42) of the bending jump unit (4) integrally forms the first triggering means (41B, 42B) and / or the second triggering means (41A, 42A), preferably as the edge of the housing (41, 42), in particular the the rear housing part (41) and the front housing part (42) each form a first (41B, 42B) and / or second triggering means integrally (41A, 42A), preferably as edges of the housing facing the gap (45). Shoe according to one of the Claims 1 to 3 , wherein the housing (41, 42) of the bending step unit (4) with an encircling, preferably integrally formed wall (46) forms an opening (47) for receiving the leaf spring (3), such that the encircling wall on the first side of the The leaf spring has a first wall section (46B) and on the second side of the leaf spring has an opposite second wall section (46A), the first and second wall sections (46B, 46A) preferably having or forming the first and second triggering means (41B, 41A) form as an inner edge, and wherein the first and second wall sections are connected to one another via lateral wall sections (46C, 46D), in particular the rear housing part (41) and the front housing part (42) each having such a wall (46) and each other Form gap (45) facing openings (47) for receiving the leaf spring (3). Shoe according to one of the Claims 1 to 4 The leaf spring (3) of the bending step unit (4) has a plate-like end (30) which is held in a socket section (48) of the housing (41, 42), which preferably faces away from the opening (47) of the housing (41, 42) , in particular the leaf spring (3) having two plate-like ends (30), each of which is held in such a socket section (48) of the rear or front housing part, preferably facing away from the opening (47) and the gap (45). Shoe according to one of the Claims 1 to 5 , wherein the leaf spring (3) of the bending jump unit (4) has a functional intermediate piece between its ends, in particular with at least one curved leg (34) and / or a folding leg (35), and the functional intermediate piece of the leaf spring (3) preferably at least partially in one Opening (47) of the housing (41, 42) facing functional section (49) of the housing (41, 42) is arranged, which forms a space (44) required for jumping between the two stable states of the leaf spring (3), in particular the Functional intermediate piece of the leaf spring (3) is at least partially arranged in such a functional section (49) of the rear or front housing part that preferably faces the opening (47) and the gap (45). Shoe according to one of the Claims 1 to 6 , wherein the housing (41, 42) of the bending step unit (4), in particular in each case the rear and front housing part, has a projection (43) around which to fix the bending jump unit (4) arranged between the insole (2) and the shoe sole (1). Shoe according to one of the Claims 1 to 7 , The bending jump unit (4) arranged between the insole (2) and the shoe sole (1) is fastened to the insole (2) and / or to the shoe sole (1), preferably by gluing, screwing and / or riveting, in particular by the housing (41, 42) and / or a plate-like end (30) of the leaf spring is attached to the insole (2) and / or to the shoe sole (1). Shoe after Claim 8 , wherein the rear housing part (41) and / or a plate-like end (30) of the leaf spring received therein is attached to the insole heel part (21) and / or the sole heel part (11), preferably by gluing, screwing and / or Rivets, and wherein the front housing part (42) and / or a plate-like end (30) of the leaf spring received therein is attached to the insole front part (22) and / or the sole front part (12), preferably by gluing, screwing and / or rivets. Shoe after Claim 9 , wherein the rear housing part (41) and / or a plate-like end (30) of the leaf spring accommodated therein, in each case at its outermost end facing away from the opening (47) and the gap (45) on the insole heel part (21), preferably by riveting or Screws is fastened, in particular is only fastened there, and the front housing part (42) and / or a plate-like end (30) of the leaf spring accommodated therein is in each case at its outermost end facing away from the opening (47) and the gap (45) is fastened to the insole front part (22) by rivets or screws, in particular is only fastened there. Shoe according to one of the Claims 1 to 10 , wherein the leaf spring (3) of the bending jump unit (4) has openings (3B) through its plate-like ends (30) in order to fix the leaf spring by rivets or screws, preferably such an opening (3B) through the outermost ends of the two plate-like ends (30) is provided. Shoe according to one of the Claims 1 to 11 , wherein the leaf spring of the bending jump unit (4) has openings (3A) in its plate-like ends in order to vary, in particular to increase, the bending moment and / or the restoring moment for the leaf spring jumping around, preferably at least two openings (3A) through the Areas of the plate-like ends (30) facing the functional intermediate piece are provided. Bistable bending step unit (4) which can assume a stable first state and a stable second state and can be jumped from the first state to the second state by a bending moment and can be jumped from the second state to the first state again by a restoring torque opposite the bending moment, especially for a shoe after one of the Claims 1 to 12 , comprising: - a bistable leaf spring (3) which can switch between two stable states and - a housing (41, 42) which at least partially surrounds the leaf spring with a first release means (41B, 42B) on a first side of the leaf spring and a second release means (41A, 42A) on a second side of the leaf spring, - the first release means (41B, 42B) being arranged on the housing (41, 42) in such a way that when a bending moment acts on the bending jump unit (4), the first release means (41B, 42B) presses on the first side of the leaf spring (3) in such a way that the leaf spring (3) jumps over, so that the bending jump unit (4) changes from its first state into its second state and - the second release means ( 41A, 42A) is arranged on the housing (41, 42) in such a way that when a restoring torque opposed to the bending moment acts on the bending jump unit (4), the second triggering means (41A, 42A) on the second side of the leaf spring (3 ) presses in such a way that the leaf spring (3) springs over, so that the bending jump unit (4) returns from its second state to its first state. Housing (41, 42) for a bistable bending step unit (4) for receiving a bistable leaf spring (3), in particular according to Claim 13 , comprising: - a first release means (41B, 42B) which is arranged on a first side of the housing (41, 42) such that when the leaf spring (3) is accommodated in the housing (41, 42), applies a bending moment to a first side of the leaf spring (3) so that the leaf spring (3) jumps from a first stable state to a second stable state and - a second triggering means (41A, 42A), which is located on a side opposite the first side second side of the housing (41, 42) is arranged such that when the leaf spring (3) is accommodated in the housing (41, 42), at a restoring moment opposite to the bending moment, pressure is exerted on a second side of the leaf spring opposite the first side (3) exercises, so that the leaf spring (3) jumps from the second stable state back to the first stable state. Method for producing a shoe, in particular according to one of the Claims 1 to 12 , comprising: - providing a shoe upper (5), an insole (2) and a bistable bending jump unit (4), in particular according to Claim 13 , - Attaching a shoe sole (1) to the shoe upper (5), the insole (2) and / or the bistable bending jump unit (4). Procedure according to Claim 15 comprising: - providing the shoe sole (1), - attaching the shoe sole (1) by gluing the shoe sole (1) to the shoe upper (5), the insole (2) and / or the bistable bending jump unit (4). Procedure according to Claim 15 comprising: - providing liquid material for shaping the shoe sole, - preferably arranging a cover (45) for closing open areas of the bending jump unit (4) and / or the insole (2) in order to prevent the entry of liquid material, - attaching the shoe sole ( 1) by feeding the liquid material into a sole shape and onto the shoe upper (5), the insole (2), the cover (45) and / or the bistable bending jump unit (4). Shoe producible or manufactured according to the method of one of the Claims 15 to 17 ,

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