EP3578066B1 - Sports shoe, in particular ski boot for practicing skiing - Google Patents

Description

The invention relates to a sports shoe, in particular a ski boot for practicing skiing.

From the AT517933B1 , which goes back to the applicant, a generic sports shoe is known. A plurality of pressure-sensitive sensors are arranged on or in this sports shoe and are connected via electrical line connections to an electronic processing device on the shoe side for the electrical sensor signals. Implementation of such a sensor system is demanding in that it enables practical use on the one hand and series production on the other.

The WO 2012/143274 A2 discloses a shoe with a pressure sensor arranged in its sole structure, comprising elongated pressure measuring cells. The pressure sensor comprises connecting strips which connect the pressure measuring cells to one another, the connecting strips being formed in one piece with the pressure measuring cells. The connection strips carry conductors for connecting the first and second electrodes of each pressure measuring cell to an electronic control module. The connecting strips have a serpentine shape to provide greater elasticity for the pressure sensor.

The WO 2018/009928 A1 discloses an insole system having a pillow layer and an acquisition layer coupled to the pillow layer. The acquisition layer contains acquisition elements in the form of a force acquisition element, strain acquisition element or environment acquisition element. The insole system also contains a communication interface by means of which the detection layer can be coupled to a controller.

The object of the present invention was to overcome the disadvantages of the prior art and to provide a sports shoe which offers comprehensive, data-technical evaluation options and can nevertheless be manufactured as cost-effectively and reliably as possible.

The invention relates to a sports shoe as specified in independent claims 1 and 2. Preferred embodiments of the invention are disclosed in the dependent claims.

Sports shoes designed according to the invention have the advantage that they offer an optimized cost-benefit ratio. In particular, with the pressure-sensitive sensors at the specified positions, a comprehensive, data-technical evaluation of the usage or application conditions of the sports shoe can be achieved. For example, this enables relatively reliable conclusions to be drawn about the balance behavior of the user of the sports shoe, which can be particularly useful in connection with alpine ski boots and the practice of skiing. Nevertheless, the sports shoes designed according to the invention can be manufactured or constructed with the specified, sensory detection means as cost-effectively as possible. Because a multi-pole foil conductor path is formed at least between individual sensors, an efficient production of the sensor system can be achieved in comparison to individual cable connections or cable cores. In particular, this also enables a cost-optimized series production of sports shoes of the generic type. Above all, due to the length adjustability or length adaptability of the multi-pole foil conductor track, a specific The type or design of the specified sensor arrangement can be used for a plurality of differently constructed sports shoes or for a plurality of different shoe sizes. In addition, the pressure-sensitive sensors can be positioned as optimally as possible, as a result of which a high level of efficiency or a high level of use of the sensor system can be achieved. In addition, the specified design is relatively robust and uncritical with regard to undesired line interruptions. In addition, a correspondingly integrated sensor system cannot be felt via the user's foot, which means that impairment of the comfort of the sports shoe can be ruled out.

The most economical and also relatively far-reaching adaptability of the pressure detection positions of the respective sensors of the sensor arrangement to different sole lengths or shoe sizes and / or cuff heights can be achieved. This usability of the optimally optimal pressure detection positions in each case ensures an improved state determination or evaluation of the respective force or pressure conditions on or in the sports shoe.

By means of the measures according to claim 3, a far-reaching change or adaptation of the distance between two sensors can be carried out in an advantageous manner and nevertheless a reliable electrical line connection within the distance section between the sensors can be ensured. The corresponding length adaptability is also robust and ensures long-term functional reliability.

The development according to claim 4 offers rapid adaptability and implementation of the sensor arrangement in sports shoes with different dimensions. In addition, the correspondingly adapted overlap width can be built up in a particularly process-reliable manner or with a relatively low probability of errors.

A particularly robust and permanent overlap of the foil conductor sections which is particularly easy to set up in use can be achieved by the measures according to claim 5. In particular, the connection or gluing process can thereby be simplified or implemented in a significantly more reliable manner.

As a result of the measures according to claim 6, the electrical line connections in the section between two sensors can be adapted quickly and reliably to the respective target or ideal distances between the sensors. In particular, individual shortening or lengthening and electrical coupling of cable ends is not necessary. The corresponding electrical connection can thus be established in a model-appropriate or precisely fitting manner, particularly quickly and also in a functionally reliable manner.

Furthermore, an embodiment according to claim 7 can be expedient. By changing the Z-shaped folding of the foil conductor track, a length adjustment and also a directional adjustment or a change in the course between the foil conductor sections can be achieved. In particular, a straight foil conductor section can also be used to build curved courses and length-adapted connections.

The measures according to claim 8 are also advantageous, since they allow the electronic sensor system to be implemented in the sports shoe as inexpensively as possible or suitable for series production. In addition, the manipulation effort for integration in or on a sports shoe can be kept low. In addition, a particularly thin sensor arrangement can be achieved in this way, in particular with a greatest thickness of less than 1 mm, preferably less than 0.5 mm.

By means of the measures according to claim 9 and / or 10, the sensor-based detection and evaluation of the force or pressure relationships between the foot of a user and the sports shoe or sports equipment attached to it can be further improved. The coupling of these sensors via foil conductor tracks offers the aforementioned production-related advantages and application-related effects.

The measures according to claim 11 are also expedient, since this allows the plug interface for the electrical connection of the sensor system to an electronic signal processing device to be optimally positioned on the sports shoe.

The embodiment according to claim 12 is also advantageous, since it causes overstressing of the foil conductor path due to elongation or compression in the course of the use of the Sports shoes can be avoided, while the pressure-sensitive sensors can remain at the optimal pressure detection positions.

Practical embodiments for implementing an appropriately functioning compensation section are specified in claim 13.

The functional reliability of the compensation section for the foil conductor track can be further increased by the measures according to claim 14. In particular, increased clamping loads compared to the compensating section of the foil conductor track can thereby be avoided.

By means of the measures according to claim 15, a compensation section with a relatively extensive compensation capacity can be created without the risk of undesired kinking or other damage to the film conductor.

In addition, by means of the measures according to claim 16, undesired kinks in the foil conductor track can be kept behind within the compensation section and, moreover, a compactly constructed compensation section can be created.

Furthermore, by means of the measures according to claim 17, undesired stresses or increased elongation forces with respect to the foil conductor track can be kept behind. This also makes it possible to achieve a high level of robustness and long-term functional reliability of the sports shoe or its sensor system.

Due to the mechanically linked arrangement of the individual sensors in series, the production of the sensor arrangement and also its implementation in various sports shoes can be simplified or made more process-efficient.

By means of the measures according to claim 19, a sensor arrangement which is essentially linearly constructed can be created. The course of partial sections of the foil conductor path via the toe section and the ball of the heel of the sports shoe favors the implementation process and the resulting construction quality of the sports shoe.

Finally, the measures according to claim 20 are also advantageous, since as a result the foil conductor track or at least partial sections of the foil conductor track are designed to be elastically stretchable and resilient and so a particularly robust and functionally reliable implementation in sports shoes can be achieved.

For a better understanding of the invention, it is explained in more detail with reference to the following figures.

Fig. 1

eine Ausführungsform eines als alpinen Skischuh ausgeführten Sportschuhs in Seitenansicht;

Fig. 2

einen bedarfsweisen herausnehmbaren Innenschuh für einen alpinen Skischuh mit einer äußeren Schale, welche aus vergleichsweise hartem Kunststoff gebildet ist;

Fig. 3

ein zweiteiliges Sensorsystem mit vier drucksensitiven Sensoren und dazwischen angeordneten Folienleiterbahnen und einer kontaktbehafteten Kopplungsstelle;

Fig. 4

einen Sportschuh, insbesondere einen Innenschuh eines Skischuhs mit einer daran angebrachten Sensoranordnung;

Fig. 5

eine Ausführungsform eines Ausgleichsabschnittes für die Folienleiterbahn der Sensoranordnung;

Fig. 6

eine weitere Ausführungsform eines Ausgleichsabschnittes für die Folienleiterbahn der Sensoranordnung;

Fig. 7

einen Benutzer mit einem Paar von erfindungsgemäß ausgeführten Sportschuhen in Kombination mit einem elektronischen Kontroll- bzw. Evaluierungssystem;

They each show in a greatly simplified, schematic representation:

Fig. 1

an embodiment of a sports shoe designed as an alpine ski boot in a side view;

Fig. 2

an if necessary removable inner shoe for an alpine ski boot with an outer shell which is made of comparatively hard plastic;

Fig. 3

a two-part sensor system with four pressure-sensitive sensors and foil conductor tracks arranged between them and a coupling point with contacts;

Fig. 4

a sports shoe, in particular an inner shoe of a ski boot with a sensor arrangement attached thereto;

Fig. 5

an embodiment of a compensation section for the foil conductor of the sensor arrangement;

Fig. 6

a further embodiment of a compensation section for the foil conductor track of the sensor arrangement;

Fig. 7

a user with a pair of sports shoes embodied according to the invention in combination with an electronic control or evaluation system;

By way of introduction, it should be noted that in the differently described embodiments, the same parts are provided with the same reference symbols or the same component names, whereby the disclosures contained in the entire description can be transferred accordingly to the same parts with the same reference symbols or the same component names. The position details selected in the description, such as above, below, to the side, etc., also relate to the figure immediately described and shown and these position details must be transferred to the new position in the event of a change in position.

In Fig. 1 a side view of an exemplary sports shoe 1, which is designed here as a ski boot, is shown.

Instead of the ski boot shown by way of example, the corresponding sports shoe 1 can also be formed by a cross-country ski boot, a snowboard boot or the like. In particular, a generic sports shoe 1 is to be understood as any shoe that comprises an outer, comparatively stiff shell 2 or at least one relatively stiff cuff or shaft section and a comparatively soft and flexible inner shoe 3 inserted therein and is intended for skiing .

The ski boot shown consists essentially of an outer, relatively dimensionally stable shell 2 and a comparatively flexible inner shoe 3. The inner shoe 3 is preferably made of foam plastic and textile materials in order to offer the user the greatest possible comfort when the user's foot is in the sports shoe 1 , is received in particular in the inner shoe 3. The inner shoe 3 can be designed to be removable or replaceable compared to the shell 2, as shown in FIG Fig. 2 is shown, or permanently connected to the shell 2, in particular glued or sewn. According to one possible embodiment, the sports shoe 1 can be designed as a touring ski boot, with the inner shoe 3 also being able to be designed so that it can be laced. According to a particularly expedient embodiment, the sports shoe 1 is designed as an alpine ski boot, the inner shoe 3 here mostly not having its own locking or fastening means.

The outer shell 2, produced for example by means of a plastic injection molding process, can also have a plurality of openings and thus also form a frame-like or cage-like holding structure for the inner shoe 3. The outer shell 2 around the inner shoe 3 is used for the most efficient or possible delay-free transmission of forces between the user's foot and the respective sports device on which the ski boot is attached or is arranged.

In both design variants of a ski boot, be it as an alpine ski boot or as a touring boot, the inner shoe 3 is received in the shell 2 and a foot received by the inner shoe 3 can be held in the inner shoe 3 by reducing the volume of the shell 2. The volume of the shell 2 is reduced by means of at least one tensioning device 4, typically tensioning buckles, it being possible for a different number of tensioning devices 4 to be arranged on the shell 2 of a ski boot depending on the design model.

The shell 2 preferably comprises a forefoot shell 7 for receiving the foot of a user and a cuff 6 adjoining the forefoot shell 7, which surrounds or receives the lower leg section of a user at least in sections. The cuff 6 - also known as a shoe upper - is preferably designed as a structurally independent element and is connected to the forefoot shell 7 via two pivot bearing devices 5. The pivot bearing devices 5 positioned on opposite side surfaces of the sports shoe 1 thus form an articulated connection between the cuff 6 and the forefoot shell 7, which enables the forefoot shell 7 and the cuff 6 to be angled. This articulated connection can of course also comprise connecting means which enable a combined translational and rotational coupling.

As in Fig. 1 shown, two clamping devices 4 can be arranged on the forefoot shell 7 and on the cuff 6. However, designs with a total of two or three clamping devices 4 per sports shoe 1 are also possible. On the cuff 6 of the sports shoe 1, a band-shaped tensioning means 8 can furthermore be arranged, by means of which a foot received in the sports shoe 1, in particular the lower leg section of a user, can be additionally stabilized. The band-shaped tensioning means 8 for the cuff 6 extends how out Fig. 1 can be seen by way of example, preferably continuously, in particular ring-like, over the circumference of the upper end section of the sports shoe 1.

A sports shoe 1 designed according to the invention comprises at least one pressure-sensitive sensor 9a-d for electrotechnical or electronic detection of mechanical pressures or forces in or on the sports shoe 1. In particular, at least one sensor 9a-d is provided in or on the sports shoe 1, which measures mechanical loads, in particular Pressures or forces between the user's foot and the sports shoe 1, converted into corresponding electrical signals or can provide corresponding signals. The at least one electronic sensor 9a-d can be designed as an active or a passive pressure or force sensor. The at least one sensor 9a-d is expediently designed as a pressure-sensitive resistance element or as a detector operating according to the resistive or ohmic principle of action. In this case, different pressure loads which act on the sensor 9a-d are mapped as different electrical resistance values, which can then be distinguished from one another or detected by electrical signals. According to an advantageous embodiment, at least one of the pressure-sensitive sensors 9a-d of the sports shoe 1, in particular on its inner shoe 3, is formed by a textile pressure sensor, which has a relatively high degree of flexibility or adaptability in relation to the three-dimensional shape of an inner shoe 3 or in relation on the contours of a foot shape. Such pressure-sensitive sensors 9a-d are also known as "textile sensors" and are well suited for attachment to or integration in soft elastic or textile objects, in particular with regard to the inner shoe 3 of the generic sports shoe 1. However, it is also possible to form at least one of the sensors 9a-d by a pressure sensor operating on the piezoelectric principle.

In Fig. 2 pressure-sensitive sensors 9a-d are illustrated at appropriate positions of an inner shoe 3.

According to a practicable embodiment, at least one sensor 9a can be positioned in the front sole section of the inner shoe 3, which front sole section is assigned closest to the ball of the toe or the forefoot section of a user when the sports shoe 1 is in use.

In addition, at least one pressure-sensitive sensor 9b can be positioned in the rear sole section of the inner shoe 3, which is assigned or can be assigned closest to the heel bone of a user.

Through the combined evaluation of the pressure signals based on or provided by the sensors 9a and 9b, conclusions can be drawn in terms of sensor technology, in particular about the weight distribution or the so-called balance of the user. The sensor-based detection of the weight distribution of the user in relation to the forefoot and / or heel bone is of increased importance and usefulness, especially in connection with ski boots, for the practice of alpine skiing, since it enables the respective weight distribution or dynamic weight shift of the user to be detected.

According to a further alternative or combinatorial embodiment, at least one pressure-sensitive sensor 9c can be provided in or on the inner shoe 3, which absorbs the pressure forces or loads acting on the lower leg or shin section of a user. Appropriately, this sensor 9c, as in FIG Fig. 1 shown schematically, positioned in a section of the sports shoe 1 closest to the front section of the cuff 6. According to the example, the at least one sensor 9c is formed directly in or on the tongue 10 of the inner shoe 3, as indicated by dash-dotted lines in FIG Fig. 1 , 2 was illustrated. As a result, the so-called template or the shift in the center of gravity of a user in the forward direction can be detected in a practicable manner.

According to an expedient measure, it can also be provided to provide at least one pressure-sensitive sensor 9d in the rear section of the upper of the inner shoe 3, as shown in FIG Fig. 1 , 2 indicated with dash-dotted lines. The rear section of the liner shaft is essentially assigned or assignable to the fibula of a user closest to it. In this way, so-called reserves or shifts in the center of gravity of a user in a rearward direction can be appropriately recorded.

The execution according to Fig. 2 represents configurations of the sensors 9a-d in the inner structure of the inner shoe 3. In particular, the sensors 9a-d are at least partially in the Material, in particular embedded in the plastic material of the inner shoe 3. Alternatively, it is of course also possible to provide at least one of the sensors 9a-d on the outer surface of the inner shoe 3 or on the inner side of the inner shoe 3 closest to the foot of a user so as to be in relatively direct contact with the foot or the sock User of the sports shoe 1 to stand.

The respective pressure forces between the user's foot and the sports shoe 1 or between the sports shoe 1 and the ground, for example a sports device coupled to the sports shoe 1, can thus be electronically or sensor-technically recorded via the at least one sensor 9a-d and subsequently by means of a evaluation electronics described are evaluated or monitored.

In order to be able to carry out this data evaluation or evaluation in an optimized manner, it is expedient if the sports shoe 1 has at least one radio communication interface 11. This radio communication interface 11 is provided for the wireless transmission of pressure signals or pressure-related data which have been recorded via the at least one pressure-sensitive sensor 9a-d. The radio communication interface 11 is provided for signal or data transmission in the short range, that is to say designed for a maximum transmission distance of up to 100 m, preferably of up to 3 m. It is useful if the radio communication interface 11 of the sports shoe 1 is designed for signal or data transmission according to the Bluetooth, ZigBee, NFC or WLAN standard. RFID communication systems are also conceivable in this context. It is essential that this radio communication interface 11 of the sports shoe 1 is compatible with a standardized radio communication interface 12 on at least one standardized electronic evaluation device 13. In particular, the communication interface 11 on the sports shoe 1 is designed for data communication with a corresponding communication interface 12 on an external, preferably mobile, electronic evaluation device 13. The signal or data transmission can take place unidirectionally starting from the communication interface 11 in the direction of the communication interface 12 of the evaluation device 13. However, bidirectional data communication is preferably provided between the shoe-side communication interface 11 and the external, evaluation-side communication interface 12, such as this in Fig. 1 was indicated by means of a double arrow. The electronic evaluation device 13 serves at least to evaluate the pressure conditions detected by the at least one pressure-sensitive sensor 9a-d or the electrical pressure signals derived therefrom. In particular, the electrical pressure signals of the at least one sensor 9a-d are transmitted in data-technical form to the electronic evaluation device 13 via the shoe-side communication interface 11 and processed or evaluated by means of this and signaled, in particular at least visualized, in a form that is practical for a user of the evaluation device 13.

The electronic, preferably mobile evaluation device 13 is preferably formed by a commercially available, mobile computing unit 14, in particular defined by a smartphone 15, as shown in FIG Fig. 5 was illustrated. Alternatively or in combination with a smartphone 15, it is also possible to use a standard tablet PC or a so-called wearable computer, for example in the form of a wristwatch. The radio communication interface 12 of these aforementioned electronic units, which is available as standard, is compatible with the radio communication interface 11 implemented on the sports shoe 1. In particular, the radio communication interface 11 on the sports shoe 1 is designed in such a way that it can establish a data communication link with at least one radio communication interface 12 of said mobile computing units 14, in particular with a radio communication interface 12 of a smartphone 15. The mobile computing unit 14, in particular the user's smartphone 15 - Fig. 5 - is in data communication with the communication interfaces 11 formed on each of the two sports shoes 1 of the user. This means that a data connection between the mobile computing unit 14, in particular the smartphone 15, of the user and the two sports shoes 1 worn by this user is or can be established. A two-channel radio connection can thus be provided between the pair of sports shoes 1 of the user and his smartphone 15.

It can be useful if the radio communication interface 11 on the respective sports shoe 1 is defined by a Bluetooth communication interface, which is connected to the corresponding, standard-implemented Bluetooth communication interface 12 of a commercially available mobile computing unit 14, in particular on a Smartphone 15, on a tablet PC, or on a wearable computer, for example in the manner of a wristwatch, is compatible.

How best from the Fig. 1 As can be seen, the at least one pressure-sensitive sensor 9a-d of the sports shoe 1 can be or is connected to an electronic signal processing device 16, in particular it is wired. This electronic signal processing device 16 is preferably arranged or can be positioned on the sports shoe 1 and serves, among other things, for conditioning or processing the electrical pressure signals provided by the at least one pressure-sensitive sensor 9a-d. The sensors 9a-d are connected or can be connected to a microcontroller 18 or a comparable electronic evaluation circuit within the signal processing device 16 via electrical line connections 17a-d.

It is also conceivable to provide the signal processing device 16 with at least one temperature and / or humidity sensor 19 ( Fig. 1 ) to be assigned, which transmits electrical signals corresponding to the prevailing temperature and / or humidity conditions via at least one line to the microcontroller 18 for processing or evaluation. As in Fig. 1 Shown schematically, such a temperature and / or humidity sensor 19 can preferably be positioned in the toe or metatarsal section of the sports shoe 1. The signal processing device 16 is then provided for the wireless transmission of the respective temperature and / or humidity data to the mobile computing unit 14, in particular to the smartphone 15, by means of which a visualization, monitoring and / or logging of the respective temperature and / or humidity values present in the sports shoe 1 can be made.

The pressure-sensitive sensors 9a-d can be designed as pressure / voltage converters, while an optional temperature and / or humidity sensor 19 can also be understood as a corresponding converter or converter circuit.

The electronic signal processing device 16 on the sports shoe 1 of a user is furthermore signal-technically coupled to the radio communication interface 11 already explained above or comprises the electronic signal processing device 16 this radio communication interface 11. According to a typical embodiment, as shown in Fig. 1 As is illustrated, the microcontroller 18 is connected via at least one data or signal line 20 to the radio communication interface 11, which is typically of modular design. To supply the electronic signal processing device 16 with electrical energy, in particular to supply energy to the various sensors and the microcontroller 18, at least one electrical energy supply source 21, in particular at least one battery or an electrochemical accumulator, is also formed on or in the signal processing device 16.

The signal processing device 16 further comprises at least one storage device for system-relevant data or operating states. The storage of such data can alternatively or in combination take place on the user, in particular by means of his mobile computing unit 14, such as in his smartphone 15, and / or in a storage device (cloud storage) accessible via a data network.

The electronic or electrotechnical components of the signal processing device 16 are preferably accommodated in a housing 22. In contrast, the pressure-sensitive sensors 9a-d in particular are positioned externally with respect to the housing 22 and via the electrical line connections 17a-d already mentioned - see FIG Fig. 2 - Either directly, but preferably via a plug interface 23 that can be activated and deactivated as required, wired or connectable to the electronic signal processing device 16. According to an expedient embodiment, the housing 22 of the electronic signal processing device 16 is arranged or can be positioned in the cuff area of the sports shoe 1, in particular on the back of the cuff 6, as shown in FIG Fig. 1 is exemplified. In this case, a holding device 24, for example a mounting bracket 25, can be provided, by means of which the housing 22 can be detachably attached in the vicinity of the upper collar section of the cuff 6, if necessary. The electronic signal processing device 16, in particular its housing 22, is preferably detachably held or mounted on or in the sports shoe 1, if necessary. As a result, among other things, a practical charging or regeneration of the energy supply source 21 and a simple maintenance of the electronic signal processing device 16 can be carried out. The shoe-side electronic signal processing device 16 or communication interface 11 and the electronic evaluation device 13 arranged peripherally for this purpose or the corresponding mobile computing unit 14 form an electronic evaluation or control system 26 - Fig. 1 , 5 - for the user of the sports shoe 1 and / or for authorized third parties. The corresponding control system 26 also provides a helpful tool for increasing customer satisfaction for sales or service companies of such sports shoes 1, in particular for sports goods retailers.

According to a practicable embodiment, a sports shoe 1, in particular a ski boot, is thus provided, which sports shoe 1 comprises a lower shoe section 27 for receiving the foot of a user and an upper shoe section 28 provided for receiving the lower leg section of this user. The upper shoe section 28 is connected to the lower shoe section 27, for example articulated, as shown in FIG Fig. 1 is illustrated. A sports shoe 1 of the generic type is thus designed like a boot or extends well beyond the ankles of a user.

The specified sports shoe 1 accordingly comprises a sensor arrangement 29 which has a plurality of pressure-sensitive sensors 9a-d arranged in a distributed manner. The sensors 9a-d are each fixedly connected or, if necessary, connectable to the electronic signal processing device 16, which is arranged or can be arranged directly on the sports shoe 1, via at least single-pole, in particular two-pole or multi-pole line connections 17a-d.

At least two sensors 9a, 9b of the sensor arrangement 29 are provided in or on a sole arrangement 30 of the sports shoe 1 that can be assigned closest to the sole of the foot of a user. At least one first sensor 9a is positioned in a forefoot section 31 of the sole arrangement 30 of the sports shoe 1 and at least one second sensor 9b is positioned in a heel section 32 of the sole arrangement 30. In relation to a longitudinal axis 33 of the sole, the forefoot section 31 can take up approximately a third of the sole length, while the heel section 32 also takes up approximately a third of the sole length.

It can be expedient if a single first sensor 9a is provided, which is arranged at least predominantly or entirely eccentrically to the sole longitudinal axis 33, in particular is positioned closer to the inside of the sports shoe 1, as is the case Fig. 2 is removable. As a result, relatively clear force measurements or pressure measurements can be made and meaningful conclusions can be drawn in a relatively efficient manner about the edging or guiding behavior of the user in relation to skis to be used in pairs.

Furthermore, it can be expedient to provide only a single second sensor 9b in the heel section 32 of the sole arrangement 30, which is positioned as centrally as possible in relation to the sole longitudinal axis 33, as shown in FIG Fig. 2 is indicated schematically. As a result, relatively good recording and evaluation results can be achieved despite the lowest possible construction or hardware costs.

The individual sensors 9a-d are connected or can be connected to the signal processing device 16 in an electrically conductive manner via single-pole or multi-pole line connections 17a-d. This electrical connection is either provided permanently or, if necessary, can be established and detached. The detection signals of the individual sensors 9a-d are preferably routed via separate electrical signal lines to the signal processing device 16 on the shoe side in order to be able to carry out a specific evaluation of the respective pressure or force relationships in the area of the sensors 9a-d.

The at least one first sensor 9a in the forefoot section 31 of the sole arrangement 30 is connected to the at least one second sensor 9b in the heel section 32 of the sole arrangement 30 via a multi-pole foil conductor 34a. This means that the line connection 17a, b between the first sensor 9a and the second sensor 9b of the sole arrangement 30 is implemented or implemented by means of a multi-pole foil conductor 34a. It is essential that the multi-pole foil conductor 34a is designed to be adjustable in length, in particular its length can be changed within certain limits if necessary, so that the multipole foil conductor 34a can be adapted with regard to a detection-optimized distance 35 between the at least one first sensor 9a and the at least one second sensor 9b is, in particular can be easily adapted to different sole lengths 36. This adaptability to various sole lengths 36 is preferably only useful or necessary in the course of the manufacturing process of the sports shoe 1 or the inner shoe 3. After the sensors 9a, 9b have been attached in the area of the sole arrangement 30, a change in the distance 35 between the sensors 9a and 9b is basically no longer necessary or no longer desired. By means of these measures, an adaptation or optimization of the sensor arrangement 29 within the sole arrangement 30 with regard to different shoe sizes or with regard to defined shoe size ranges can be achieved in an effective and advantageous manner. As a result, optimal sensor-related condition detection is possible and a cost-optimized structure can be supported at the same time, since a specific, structurally prefabricated sensor arrangement 29 can be used or used for a plurality of different sports shoes 1 with different sole lengths 36.

The same can apply to the further sensors 9c and / or 9d of the sensor arrangement 29 in or on the sports shoe 1. In particular, it can be provided that the at least one third or fourth sensor 9c, 9d in the upper shoe section 28 is connected to the at least one first or second sensor 9a, 9b on the sole arrangement 30 of the sports shoe 1 via a multi-pole foil conductor 34b or 34c. At least one of these multi-pole foil conductor tracks 34b, 34c between the upper shoe section 28 and the lower shoe section 27 can, if necessary, be designed to be adjustable in length. This length adjustability ensures that a distance 35b or 35c between the at least one third or fourth sensor 9c, 9d in the upper shoe section 28 and the at least one first or second sensor 9a, 9b on the sole arrangement 30 of the sports shoe 1 can be changed, in particular is adaptable to upper shoe sections 28 with different height dimensions 37 depending on the model. As a result, it is possible to ensure that the forces or pressure effects occurring in or on the sports shoe 1 are recorded in a manner that is optimized in terms of sensor technology. In addition, the most economical implementation of the corresponding sensor systems in a plurality of different sports shoes 1, which vary depending on the model or shoe size, can thereby be ensured. The manufacturing process of sports shoes 1 with the specified sensor system 29 can thereby be implemented more economically and at the same time more reliably.

Like them in Fig. 2 has been illustrated schematically, the foil conductor 34a, b, c is formed between at least two successive or serially connected sensors 9a, b, c, d by foil conductor sections 38 ', 38 ", which foil conductor sections 38', 38" with regard to their overlap width 39a, b, c are designed to be changeable or specifically changeable if necessary, so that sensors 9a, b, c, d which follow one another can be adapted to one another with regard to their spacing 35a, b, c. In particular, it can be provided that the film conductor 34a, b, c has a first film conductor section 38 'in a structurally permanent or fixed connection with the at least one first, second, third and / or fourth sensor 9a, b, c, d and at least one second Foil conductor section 38 ″ in a structurally permanent or fixed connection with the at least one first or second sensor 9a, b. In this context, it is particularly practical that a variable or adaptable overlap width 39a, 39b, 39c between the first foil conductor section 38 ' and the next associated second foil conductor section 38 ″ is available. In particular, this makes it possible to adapt the positions of the respective sensors 9a, b, c, d as optimally as possible to the respective sole length 36 and / or to the respective height dimension 37 of the sports shoe 1, preferably with the smallest possible variety or design variety printed sensor systems or sensor assemblies 29 to find sufficient. In this way, on the one hand, technical sensing advantages and on the other hand, economic advantages can be combined. In particular, at least one of the distances 35a, b, c can thereby be adapted as optimally as possible to the respective dimensions of the sports shoe 1 in which the sensor system is to be implemented. In particular, a correspondingly assembled or joined foil conductor track 34a, b, c can be adapted as required to a plurality of different sole lengths 36 or to different height dimensions 37 of upper shoe sections 28.

In the Fig. 3a, b an embodiment of a sensor arrangement 29, which is designed for implementation in or on a sports shoe, is shown. In the Figures 3a and 3b the front and rear sides of a sensor arrangement 29 comprising a total of four pressure-sensitive sensors 9a-d are illustrated.

According to the embodiment according to Fig. 3 a two-part sensor arrangement 29 is provided, which can be combined or put together to form a one-piece sensor arrangement 29 as required. As best from a synopsis of the Fig. 2 and 3rd As can be seen, it is useful if an end section 40 'of the first foil conductor section 38' and an end section 40 "of the second foil conductor section 38" with an overlap width 39a adapted as required - Fig. 2 - Are arranged one above the other and thereby build up or produce at least one electrical line connection between the first or third sensor 9a, c and the second or fourth sensor 9b, d in the respective overlap section 41a, b, c.

How best from the Fig. 3a, b As can be seen, according to an expedient embodiment, at least one adhesive surface 42 can be provided in the at least one overlap section 41a, on which preferably self-adhesive adhesive is formed. The at least one adhesive surface 42 can expediently be formed on at least one adhesive flap 43, which at least one adhesive flap 43 can be formed on the first and / or second foil conductor section 38 ', 38 ". The at least one adhesive flap 43 is relative to the first and / or second Foil conductor section 38 ', 38 "can be folded over or correspondingly folded over in the implementation state, in order to be able to ensure a stable, non-positive connection between the two foil conductor sections 38', 38".

As if from a synopsis of the Figures 3a and 3b As can be seen, electrical contact tongues 44 ', 44 "are formed in the end section 40' of the first foil conductor section 38 'and in the end section 40" of the second foil conductor section 38 ". As a result, several electrical signal paths are set up between the first foil conductor section 38 'and the second foil conductor section 38 ".

How best to look Figure 3b As can be seen, it is expedient if the multi-pole foil conductor 34a, b, c comprises a carrier foil 45 made of flexible plastic, at least in the sections between the sensors 9a-d, on which carrier foil 45 electrical conductor tracks 46 are printed. The pressure-sensitive sensors 9a-d are preferably also sensitive to them Carrier film 45 printed on. In particular, according to an expedient embodiment, it is advantageous if the at least one first or second sensor 9a, b is also attached, in particular printed, to this carrier film 45.

The illustrated embodiment of the sensor arrangement 29 also comprises a foil conductor track 34c, which represents a third foil conductor section. This foil conductor track 34c or the corresponding third foil conductor section extends between the at least one first sensor 9a and the at least one third sensor 9c. This third sensor 9c is preferably positioned in a tongue section 47 of the tongue 10 of the sports shoe 1 that can be assigned closest to the shin of a user.

The illustrated embodiment of the sensor arrangement 29 further comprises a foil conductor track 34b which defines a fourth foil conductor section which extends between the at least one second sensor 9b and the at least one fourth sensor 9d. In the implementation state of the sensor system 29, this fourth sensor 9d is positioned in a calf section 48 of the sports shoe 1 that can be assigned closest to the calf of the user.

The sensor arrangement 29 can also comprise a foil conductor track 34d which defines a fifth foil conductor section which extends between the at least one fourth sensor 9d and the central plug interface 23 of the sports shoe. It is advantageous if the plug interface 23 is formed per se by the film conductor 34d and for this purpose has a plurality of electrical contact tongues 49 in its end section, as shown in FIG Fig. 3a, b can be seen by way of example.

According to an expedient, in Fig. 2 The illustrated embodiment provides that the multipole film conductor 34a, b, c the at least one third sensor 9c in the tongue section 47 of the sports shoe 1, the at least one first sensor 9a in the forefoot section 31 of the sole arrangement 30, the at least one second sensor 9b in the heel section 32 of the The sole arrangement 30 and the at least one fourth sensor 9d in the calf section 48 of the sports shoe 1 mechanically connects or couples to one another in series. From a mechanical point of view, the individual sensors 9a-d are threaded in series via the multi-pole foil conductor 34a, b, c and joined together to form a one-piece sensor assembly.

In Fig. 4 a further exemplary embodiment of a sports shoe 1 embodied according to the invention, in particular an inner shoe 3 for a ski boot, is schematically illustrated.

In this case, at least one pressure- or force-sensitive sensor 9a, 9b is provided in the forefoot section 31 and in the heel section 32. In addition, at least one force- or pressure-sensitive sensor 9d is implemented in the calf section 48 of the sports shoe 1. The sensors 9a, b and d are serially connected to one another or coupled to one another in succession via the foil conductor tracks 34a, b. Foil conductor sections 38 'and 38 "are provided between the sensors 9a, b, which can be adapted with regard to their overlap width 39a to the positions of the sensors 9a, b that are considered to be optimal in each case.

In contrast, a film conductor 34b is provided in the area between the sensors 9b and 9d, which acts to compensate for length or deformation when the sports shoe 1 is used. In particular, it is provided that at least one of the sensors 9a-d is connected to the sports shoe 1 in a fixed position, in particular glued. At least one compensation section 50 is provided within the respective foil conductor tracks 34a, b which are connected to one another. According to the example, the compensation section 50 is formed between the two sensors 9b and 9d which are connected to the sports shoe 1 in a fixed position or fixed. The at least one compensating section 50 within the film conductor 34b serves to compensate or record changes in distance between at least two sensors 9a-d, in particular between the sensors 9b and 9d in the course of use and an associated, load-related elastic deformation of the sports shoe 1 this compensating section 50 enables a distance variation in the course of changes in the position of the user of the sports shoe 1, whereby overloading or excessive tensile stresses on the film conductor 34b are prevented.

According to the embodiment in Fig. 4 For example, this compensating section 50 can be formed by an S-shaped, curved or also meandering section of the film conductor 34b. Analogous to this, U- or Z-shaped courses of at least one film conductor 34a, b can also be implemented in order to be able to compensate sufficiently for at least one compensation section 50 for deformation-related changes in length during use of the sports shoe 1.

As best from a synopsis of the Figures 4 to 6 As can be seen, it can be expedient if the at least one compensating section 50 for the foil conductor track 34a, b is arranged at least partially within a recess 51 or a material clearance of the sports shoe 1. In particular, a corresponding compensation section 50 can be implemented within the sole arrangement 30 or within another boundary wall 52 of the sports shoe 1. The corresponding compensating sections 50 are sufficient to largely compensate for the changes in length in the foil conductors 34a, b that occur in the course of use-related elastic deformations of the sports shoe 1, without critical tensile stresses or overstretching of the foil conductors 34a, b occurring.

How best to look Fig. 5 As can be seen, a comb-like or grid-like support element 53 can also be provided within the compensation section 50. This support element 53 can be designed structurally independently or as an integral part of the sports shoe 1. The comb-like or lattice-like support element 53 is used to define or support a zigzag or undulating subsection of the film conductor 34b. In particular, the comb-like or lattice-like support element 53 can create relatively far-reaching compensation sections and thus prevent excessive stressing or kinking of the film conductor 34b.

How best to look Fig. 6 As can be seen, according to one embodiment it can also be provided that at least one spacing element 54 is formed in at least one deflection section of an S-shaped subsection of the film conductor 34a. As a result, a sufficiently extensive compensating section 50 can be created without causing excessive kinking or folding over of the foil conductor section 34a.

How further from a synopsis of the Figures 4 to 6 As can be seen, it is expedient if the film conductor 34a, b is firmly glued or sewn to the sports shoe 1 in relation to its longitudinal extent within fastening sections that are spaced apart from one another and is loosely held in intervening sections relative to the sports shoe 1. Also as a result, a compensatory behavior is achieved which is advantageous in order to prevent overstressing or excessive stretching of the foil conductor tracks 34a, b in the course of the intended use of the sports shoe 1.

How best to look Fig. 2 As can be seen, it can be provided in an advantageous manner that the multi-pole foil conductor 34a, b, c starting from the at least one third sensor 9c in the tongue section 47 of the sports shoe 1 via the instep section 55 and preferably via the toe section 56 of the sports shoe 1 to the at least one first sensor 9a in the forefoot section 31 of the sole arrangement 30, further via the sole center area of the sole arrangement 30 to the at least one second sensor 9b in the heel section 32 of the sole arrangement 30, and further via the heel ball section 57 of the sports shoe 1 to the at least one fourth sensor 9d im Calf portion 48 of the sports shoe 1 runs.

According to an expedient embodiment, it is provided that at least one of the film conductor tracks 34a, b, c comprises a carrier film 45 made of a polyurethane elastomer or a silicone material. Electrical conductor tracks 46 applied thereon, in particular printed on, can be formed by a printing ink containing silver or carbon particles. It can thereby be achieved that at least one of the foil conductor tracks 34a, b, c is designed to be elastically stretchable and resilient with respect to its longitudinal extension. In particular, an elastic extensibility of up to 10%, in particular of up to 25% in relation to the initial length or in relation to the unloaded idle state of a correspondingly constructed film conductor 34a, b, c can be achieved. Thus, in the sensor arrangement 29, a quasi-integral compensation section 50 for the relatively marginal changes in position of the sensors 9a-d that occur during use of the sports shoe 1 can be created simply and effectively.

The exemplary embodiments show possible design variants, whereby it should be noted at this point that the invention is not restricted to the specifically illustrated design variants of the same, but rather various combinations of the individual design variants with one another are possible and this possibility of variation is based on the teaching of technical action through the present invention in Ability of the person skilled in this technical field.

The scope of protection is determined by the claims. However, the description and the drawings are to be used to interpret the claims. Individual features or combinations of features from the different exemplary embodiments shown and described can represent independent inventive solutions. The task on which the independent inventive solutions are based can be found in the description.

For the sake of clarity, it should finally be pointed out that, for a better understanding of the structure, some elements have been shown not to scale and / or enlarged and / or reduced. <b> List of reference symbols </b> 1 Sports shoe 28 Shoe section (upper) 2 Bowl 29 Sensor arrangement 3rd Liner 30th Sole arrangement 4th Jig 31 Forefoot Section 5 Swivel bearing device 32 Heel section 6th cuff 33 Longitudinal axis of the sole 7th Forefoot shell 34a, 34b Foil conductor 8th Clamping device 34c, 34d Foil conductor 9a, 9b sensor 35a, 35b distance 9c, 9d sensor 35c, 35d distance 10 tongue 36 Sole length 11 Communication interface 37 Height dimension 12th Communication interface 38 ', 38 " Foil conductor sections 13th Evaluation device 39a, b, c Overlap width 14th mobile computing unit 40 ', 40 " End section 15th Smartphone 41a, b, c Overlap section 16 Signal processing device 42 Adhesive surface 17a, 17b Line connections 43 Glue flap 17c, 17d Line connections 44 ', 44 " electrical contact tongues 18th Microcontroller 45 Carrier film 19th Temperature and / or humidity sensor 46 47 electrical conductor tracks tongue section 20th Data or signal line 48 Calf section 21 Power source 49 electrical contact tongues 22nd casing 50 Compensation section 23 Connector interface (first) 51 deepening 24 Holding device 52 Boundary wall 25th Mounting bracket 53 Support element 26th Control system 54 Distancing element 27 Shoe section (lower) 55 Instep section 56 Toe section 57 Heel ball section

Claims (20)

1. A sports boot (1), in particular a ski boot for exercising ski sports,
   with a lower boot portion (27) intended to receive a user's foot and
   an upper boot portion (28) intended to receive the lower leg portion of this user, the upper boot portion (28) being connected to the lower boot portion (27),
   a sensor assembly (29) comprising multiple distributed pressure-sensitive sensors (9a-d), which are connected or can be connected via electrical cables (17a-d) to an electronic signal processing device (16),
   wherein at least two sensors (9a, 9b) of the sensor assembly (29) are provided on a sole assembly (30) of the sports boot (1), and
   wherein at least one first sensor (9a) is positioned in a front foot portion (31) of the sole assembly (30) and at least one second sensor (9b) is positioned in a heel portion (32) of the sole assembly (30),
   wherein
   the at least one first sensor (9a) in the front foot portion (31) of the sole assembly (30) is connected to the at least one second sensor (9b) in the heel portion (32) of the sole assembly (30) via a multipolar foil strip conductor (34a),
   wherein the multipolar foil strip conductor (34a) is designed so as to have a length adjustable as necessary, such that
   a distance (35a) between the at least one first sensor (9a) and the at least one second sensor (9b) can be adapted to various sole lengths (36) during the course of manufacturing of the sports boot (1),
   characterized in that
   the foil strip conductor (34a) comprises a first foil strip conductor portion (38') connected to the at least one second sensor (9b) and a second foil strip conductor portion (38") connected to the at least one first sensor (9a), and that an overlap width (39a) between the first foil strip conductor portion (38') and the second foil strip conductor portion (38") is designed so as to be changeable, so that an accordingly assembled foil strip conductor (34a) can be adapted to different sole lengths (36) as necessary.
2. The sports boot (1), in particular a ski boot for exercising ski sports,
   with a lower boot portion (27) intended to receive a user's foot and an upper boot portion (28) intended to receive the lower leg portion of this user, the upper boot portion (28) being connected to the lower boot portion (27),
   a sensor assembly (29) comprising multiple distributed pressure-sensitive sensors (9a-d), which are connected or can be connected via electrical cables (17a-d) to an electronic signal processing device (16)
   wherein at least one first or second sensor (9a, 9b) of the sensor assembly (29) is provided on a sole assembly (30) of the sports boot (1), and at least one third or fourth sensor (9c, 9d) of the sensor assembly (29) is provided in the upper boot portion (28) of the sports boot (1),
   characterized in that
   the at least one third or fourth sensor (9c, 9d) in the upper boot portion (28) is connected to the at least one first or second sensor (9a, 9b) on the sole assembly (30) of the sports boot (1) via a multipolar foil strip conductor (34b, c),
   wherein the multipolar foil strip conductor (34b, c) is designed so as to have a length adjustable as necessary, such that
   a distance (35b, c) between the at least one third or fourth sensor (9c, 9d) in the upper boot portion (28) and the at least one first or second sensor (9a, 9b) on the sole assembly (30) of the sports boot (1) can be changed as necessary, in particular adaptable to upper boot portions (28) with model-dependent different height dimensions (37) during the manufacturing of the sports boot (1),
   wherein the foil strip conductor (34b, c) comprises a first foil strip conductor portion (38') connected to the at least one third or fourth sensor (9c, 9d) and a second foil strip conductor portion (38") connected to the at least one first or second sensor (9a, 9b), and that an overlap width (39b, c) between the first foil strip conductor portion (38') and the second foil strip conductor portion (38") is designed so as to be changeable, so that an accordingly assembled foil strip conductor (34b, c) can be adapted to different height dimensions (37) of upper boot portions (28) as necessary.
3. The sports boot according to claim 1 or 2, characterized in that an end portion (40') of the first foil strip conductor portion (38') and an end portion (40") of the second foil strip conductor portion (38") with an overlap width (39a, b, c) that is adjusted as needed are arranged above each other and thereby continue or develop at least one electric line link in their overlapping portion (41a, b, c) between at least two sensors (9a-d) of the sensor assembly (29).
4. The sports boot according to claim 3, characterized in that at least one adhesive surface (42) with a self-adhesive substance is formed in the overlapping portion (41a, b, c).
5. The sports boot according to claim 4, characterized in that the adhesive surface (42) is formed on at least one adhesive flap (43) on the first and/or second foil strip conductor portion (38', 38"), which at least one adhesive flap (43) is or can be folded relative to the first and/or second foil strip conductor portion (38', 38").
6. The sports boot according to one of the preceding claims, characterized in that in both the end portion (40') of the first foil strip conductor portion (38') and in the end portion (40") of the second foil strip conductor portion (38"), electric contact blades (44', 44") are formed, which are positioned to overlap, such that at least one electrically conducting connection between the first foil strip conductor portion (38') and the second foil strip conductor portion (38") is created.
7. The sports boot according to one of the preceding claims, characterized in that the foil strip conductor (34a, b, c) is formed as a single piece at least between individual sensors (9a-d) of the sensor assembly (29) and has a Z-shaped fold, via which Z-shaped fold a distance (35a, b, c) between at least individual sensors (9a-d) of the sensor assembly (29) can be adapted to different sole lengths (36) and/or to model-dependent different height dimensions (37) of a sports boot (1).
8. The sports boot according to one of the preceding claims, characterized in that the foil strip conductor (34a, b, c) comprises a carrier film (45) made of plastic, onto which carrier film (45) electric conducting paths (46) are printed and at least the first or second sensor (9a, b) is printed.
9. The sports boot according to one of claims 2 to 8, characterized in that the foil strip conductor (34c) defines a third foil strip conductor portion that extends between the at least one first sensor (9a) and the at least one third sensor (9c), which third sensor (9c) is positioned in a tongue portion (47) of a tongue (10) of the sports boot (1) assignable closest to the shin of a user.
10. The sports boot according to one of claims 2 to 9, characterized in that the foil strip conductor (34b) defines a fourth foil strip conductor portion that extends between the at least one second sensor (9b) and the at least one fourth sensor (9d), which fourth sensor (9d) is positioned in a calf portion (48) of the sports boot (1) assignable closest to the calf of a user.
11. The sports boot according to one of claims 2 to 10, characterized in that the foil strip conductor (34d) defines a fifth foil strip conductor portion, which extends between the at least one fourth sensor (9d) and a connector interface (23) with a plurality of electrical contact blades (49).
12. The sports boot according to one of the preceding claims, characterized in that at least one of the sensors (9a-d) is connected so as to be fixed in position to the sports boot (1), in particular is glued, and at least one compensation portion (50) is formed in the foil strip conductor (34a-d) for compensation or absorption of changes in distance between at least two of the sensors (9a-d) during use and the resulting elastic deformation of the sports boot (1) caused by load.
13. The sports boot according to claim 12, characterized in that the compensation portion (50) is formed by a U-shaped, Z-shaped, S-shaped, arched, or meandering partial portion of the foil strip conductor (34a-d).
14. The sports boot according to claim 12 or 13, characterized in that the compensation portion (50) of the foil strip conductor (34a-d) is at least partially arranged in a recess or gap in the material of the sports boot (1).
15. The sports boot according to one of claims 12 to 14, characterized in that there is a comb- or lattice-like support element (53) in the compensation portion (50) to define or support a zigzag or wave-shaped partial portion of the foil strip conductor (34a-d).
16. The sports boot according to claim 13, characterized in that at least one distancing element (54) is formed in at least one redirection portion of a U-shaped or S-shaped partial portion of the foil strip conductor (34a-d).
17. The sports boot according to one of the preceding claims, characterized in that the foil strip conductor (34a-d) is glued or sewed to the sports boot (1) within distanced attachment portions with respect to its length extension, and that partial portions located between are loosely attached relative to the sports boot (1).
18. The sports boot according to one of claims 2 to 17, characterized in that the foil strip conductor (34a-c) serially connects the at least one third sensor (9c) in the tongue portion (47) of the sports boot (1), the at least one sensor (9a) in the front foot portion (31) of the sole assembly (30), the at least one second sensor (9b) in the heel portion (32) of the sole assembly (30) and the at least one fourth sensor (9d) in the calf portion (48) of the sports boot (1) in a mechanical sense.
19. The sports boot according to claim 18, characterized in that the foil strip conductor (34a-c) runs from the at least one third sensor (9c) in the tongue portion (47) of the sports boot (1) past the instep portion (55) and preferably past the toe portion (56) of the sports boot (1) to the at least one first sensor (9a) in the front foot portion (31) of the sole assembly (30), further on via the mid-sole area of the sole assembly (30) to the at least one second sensor (9b) in the heel portion (32) of the sole assembly (30) and on via the heel ball portion (57) of the sports boot (1) to the at least one fourth sensor (9d) in the calf portion (48) of the sports boot (1).
20. The sports boot according to one of the preceding claims, characterized in that at least one of the foil strip conductors (34a, b, c) comprises a carrier film (45) made of a polyurethane elastomer or a silicone material and comprises an electric conductor path (46) made of printing ink that contains silver or carbon particles on it, such that at least one of the foil strip conductors (34a, b, c) is made to elastically extend and contract with respect to its length extension.

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