EP3106051B1 - Shoe with electrical venting system - Google Patents

Description

Field of the invention

The present invention relates to a shoe with an electric ventilation device that provides air for air circulation in the shoe and thus directly to the foot of the user of the shoe.

Background of the invention

A shoe consists of two main parts, namely the upper part, called the shank, and the lower part, the floor. The shank may include an inner shank (chuck), intermediate shank (intermediate chuck) and outer shank (upper leather). The upper part of the upper includes the front leaf, if necessary with a tongue, the back of the heel and lateral quarters, which adjoin the heel seam. A shaft connected to an insole is called a mounted shaft. The floor may comprise a one-piece or multi-part outsole. Furthermore, the floor may be formed as a flat sole or heel sole.

US 2005/060906 A1 discloses: shoe, with a sole; an air pumping device which is provided at least partially in a region of the sole and is adapted to suck in relief of the sole during the walking movement of a user of the shoe air from outside the shoe and under load of the region of the sole during the walking movement of the user of the shoe for Venting ventilation of an interior of the shoe; and an electrically operable ventilation device, which is designed to ventilate the interior of the shoe.

Nowadays, shoes are known which are equipped in the sole with devices which are supposed to favor air circulation in the shoe, whereby the internal moisture in the shoe can be reduced in order to improve the foot comfort of the user of the shoe. So will in the WO 2012/126489 described a sole construction with an air pump device, which allows a good air ventilation. The in the in the WO 2012/126489 described sole construction comprises an air pumping device, for example in the form of a plastic pump reservoir. The air pumping device is compressed when a user's foot presses on it, which squeezes air out of the plastic pumping reservoir. If during the walking movement the plastic pump reservoir is again relieved of the foot, it expands and pulls in due to the negative pressure previously created air from the outside, which for the subsequent Ventilation of the shoe interior and thus the foot of a user is freshly available.

However, the known sole construction can only provide active air ventilation during the walking movement of a user. When standing or sitting, the active ventilation of the shoe interior does not work.

It is therefore the object of the present invention to provide a shoe with an effective ventilation device, in which an active supply of air required for air circulation in the shoe is made possible, in particular even outside a walking movement of a user of the shoe.

Description of the invention

The above object is achieved by a shoe according to independent claim 1. Advantageous developments of the shoe will become apparent from the dependent claims 2-7. The mechanically operable air pumping device is at least partially provided in an area of the sole and adapted to suck in air from outside the shoe while relieving the area of the sole during walking of a user and ventilating the area of the sole during the walking movement of the user for ventilation of an interior of the shoe to squeeze or eject. The electrically operable ventilation device is designed, in particular outside a walking movement of the user of the shoe to ventilate the interior of the shoe. The interior of the shoe can be defined by a shaft with an insole attached to the lower end, that is, by a mounted shaft. The interior of the shoe is adapted to receive a foot of the user of the shoe. The sole may be attached to a mounted shaft and may include a tread that contacts a committed ground during a walking motion of a user.

The venting can be done independently of the walking movement by means of the electrically operable ventilation device. On the other hand, the walking motion can be used to gain electrical energy that serves the operation of the electrically operable ventilation device (see also description below). The electrically operable ventilation device can provide air for ventilation, even if the user of the shoe does not make a walking movement, for example when the user of the shoe is standing or sitting. Thus, the comfort in the shoe even then by a Air ventilation can be increased if the air pump device is not actuated by the walking motion. Furthermore, the electrically operable ventilation device can amplify a ventilation provided by the air pump device.

The air pump device may be formed as a cavity or comprise a lung (a plastic pump reservoir formed as a separate entity). The lung may be fitted in a corresponding recess of the sole. The cavity may be formed between a recess of the sole and an insole of the shoe. The sole of the shoe may be formed integrally or in several parts with recesses on the upper surface, and the air pump device and / or the electrically operable ventilation device may be provided at least partially in such recesses.

The electrically operable ventilation device, a motor-driven fan (fan), for example, with an electronically controlled motor, or a motorized air pump, such as a motor-driven diaphragm diaphragm pump, and connected to the fan or the air pump energy storage, in particular a battery (accumulator ), respectively. A "battery" is understood here as a rechargeable storage for electrical energy, for example on an electrochemical basis. For example, a lithium-ion or a lithium-polymer battery can be used. The electrical energy stored in the energy store can be used to operate the electrically operable ventilation device.

The electrically operable ventilation device and / or the energy store may be located below or next to the air pump device. The energy store may alternatively be provided in the sole or in the upper of the shoe. An electrical connection can be provided between the energy store and the electrically operable ventilation device.

To charge the energy storage, a charging device ("energy harvester") for the energy store, in particular a device for converting kinetic energy into electrical energy, a device for converting solar energy into electrical energy or an inductive charging device (with a corresponding coil) may be provided in the shoe his. Also, the shoe can be an electrical connection (For example, a USB port), which is connected to the energy storage and over which the energy storage is rechargeable.

In general, the ventilation mode can be switched in the shoe and / or electronically controlled or regulated. Thus, a first switching device may be provided in the shoe, which is designed to switch the operation of the air pump device and / or electrically operable ventilation device of fresh air to circulating air and vice versa. When switching to circulating air, no fresh air is sucked in from outside the shoe by the air pump device or the electrically operable ventilation device, but the air pump device or the electrically operable ventilation device sucks in air from the inside of the shoe. In this context, at least one switchable valve can be provided (see also the description below); the first switching device may comprise a switchable valve. In this connection, a device for measuring a temperature and / or humidity inside and / or outside the shoe can furthermore be provided, wherein the first switching device is configured to control the operation of the air pump device or the electrically operable ventilation device in dependence on a signal output of the device for Measuring a temperature and / or humidity switch. An electronic controller can be provided which is designed to control the operation of the electrically operable ventilation device in dependence on a signal output of the device for measuring a temperature and / or humidity via the first and / or second switching device.

As described, the electrically operable ventilation device can serve for the ventilation of the shoe interior while the user is standing or sitting and thus the air pump device is not activated. The ventilation device or the motor-driven fan or the motor-driven air supply pump, for example, by means of a second switching device, which may be provided in or on the shoe, switched on and / or off. This second switching device may comprise a mechanically or electrically / electronically controlled switch. By the first and / or second switching device, the operation of the electrically operable ventilation device can be made variable. A user of the shoe can operate a mechanical switch to turn on / off the ventilation device. It may be in the shoe means for determining a state of deformation of the sole, the configured to output a signal based on the determined state of deformation of the sole. This device can thus detect whether or not a walking movement is performed. In this case, the second switching device may be configured to switch on and / or off the electrically operated ventilation device in response to the signal, optionally after a predetermined delay.

The first and / or second switching device can be operated via an electronic control. It may be provided here that the electronic controller can communicate with an external device, for example a mobile telephone or portable computer system, a wearable, etc., via a wireless communication module arranged in the shoe. On the external device can run an app by means of which the operation of the electrically operated ventilation device can be controlled via the electronic control.

Furthermore, the first and / or second switching device may be designed to switch the operation of the electrically operable ventilation device in response to a signal output of the device for measuring a temperature and / or humidity. For example, an electronic controller may cause the electrically operable ventilation device to be turned on when the temperature and / or humidity exceeds a predetermined threshold stored in the control electronics or a separate memory. The device for measuring a temperature and / or humidity can transmit the measured values wirelessly or via a plug contact to the electronic control. Thus, a sufficient ventilation of the shoe interior can be achieved if the air pump device is not or not sufficiently operated, so that they could ensure a satisfactory ventilation.

In general, the air guide may be made in the shoe and in the interior thereof via an air supply device connected to the air pumping device and the electrically operable ventilation device, and an air discharge device connected to the air pumping device and the electrically operable ventilation device. In this case, air can be conducted from outside the shoe to the air pump device and the electrically operable ventilation device via the air supply device and air from the air pump device via the air discharge device and the electrically operable ventilation means for ventilating the interior of the shoe are discharged. It can also be provided that the air supply device is connected directly to the electrically operable ventilation device and is completely dispensed with the mechanically actuated air pump device. It may be provided a bypass line for selectively bypassing the air pump device, so that fresh air from outside the shoe can pass directly through the air supply to the electrically operable ventilation device. The air supplied by the air pump device and electrically operable ventilation device via the air discharge device can be passed, for example, through the openings of a perforated insole into the interior of the shoe. According to alternative developments, the air supply device and / or air discharge device may comprise channels and / or tubes, for example in the channels. The air discharge device may comprise channels formed in the sole. The air supply device and / or air discharge device can be connected via valves to the air pump device and / or electrically operable ventilation device or they can contain valves.

In particular, a first valve may be provided, which is designed to allow air to pass only to the air pump device and / or ventilation device and / or a second valve, which is designed to pass air only away from the air pump device and / or ventilation device. Various air supply devices and / or air discharge devices may be provided for the air pump device and the ventilation device, or at least partially the same air supply devices and / or air discharge devices for the air pump device and the ventilation device may be provided.

According to a development, the shoe comprises a first air supply device, which is connected to the air pump device, and a second air supply device, which is connected to the electrically operable ventilation device. According to this development, the shoe further comprises an air discharge device, which is connected to the air pump device and the electrically operable ventilation device, wherein air from the outside of the shoe to the air pump means via the first air supply means and air from the inside of the shoe to the electrically operable via the second air supply means Ventilation device can be performed and Air can be provided by the air pumping device and the electrically operable ventilation device for ventilating the interior of the shoe via the air discharge device. The second air supply device may, for example, below the upper leather of the shaft of the shoe, be provided in the neighborhood. In the fresh air mode, air is guided from the outside of the shoe to the air pump device via the first air supply device, and air is conducted from the interior of the shoe via the second air supply device to the electrically operable ventilation device in the recirculation mode. Switching from fresh air mode to recirculating air mode and vice versa may involve switching a valve, for example an electromagnetic valve. This switchable valve may be in communication with the first air supply device and the second air supply device so that it allows air to pass from the first air supply device in the fresh air mode and air from the second air supply device to the air pump device and / or electrically operable ventilation device during the recirculation mode.

According to a development, the shoe comprises an air supply device which is connected to the air pump device, and a first air discharge device which is connected to the air pump device, wherein the electrically operable ventilation device is provided in the air discharge device or is in fluid communication therewith and air via the first air supply device can be guided from outside the shoe to the air pump device and air can be provided by the air pumping device and / or the electrically operated ventilation device for ventilating the interior of the shoe via the air discharge device. In this case, furthermore, a bypass line may be provided in connection with the first air supply device and the air discharge device and be configured to direct air from the first air supply device to the air discharge device to the air discharge device and the electrically operable ventilation device. Furthermore, in this case a second air supply device can be provided, via which air can be guided from the interior of the shoe to the electrically operable ventilation device. In this case, a further switchable valve can be provided, which can be switched so that it allows only air from the first or only air from the second air supply device. In recirculation mode, air, for example via the said bypass line or via the air pump device, can pass from the interior of the shoe to the electrically operable ventilation device and be led back into the interior of the shoe via the air discharge device. The shoe can do this a heating device, by means of which, for example, the guided into the shoe interior air can be heated. For example, the electrically operable ventilation device can have this heating device. In principle, provision can be made for air from the interior of the shoe to be heated by the heating device in recirculation mode and / or air from the outside in fresh air mode before ejection into the interior of the shoe.

In all the embodiments described above, the sole may be formed in one or more parts with recesses on the upper surface (facing the insole of a mounted shaft) and the air pumping device and the electrically operable ventilation device may be at least partially provided in such recesses. The sole may be provided as a sole body with recesses in at least one surface of the sole body. The sole body can be injection molded in one piece. Likewise, the sole can be molded directly onto the shaft. Preferably, the sole is made of soft and jump elastic material. Particularly suitable for this purpose are EVA (ethylene-vinyl acetate), (PU) polyurethane, molded or vulcanized rubber or TR (thermoplastic rubber) and other common sole materials. For example, the Shore hardness of these materials can be between 45 and 65 Shore A.

In all of the above-described examples of the present invention, the shoe may further include an air-intake device ("AirIntake") through which fresh air can be sucked in from outside the shoe. This air inlet device is suitable for attachment to or in part in a shaft of the shoe, and it may comprise air inlet and a device which is adapted to discharge water that penetrates through the air inlet, so that a large volume of fresh air can be sucked in, without the water / moisture / moisture is thereby passed into the shoe interior. The air inlet device can in this case be connected to the air supply device or first air supply device described above. The device adapted to vent water entering through the air inlet may include an outlet in fluid communication with the air inlet. Further, the air inlet means may comprise an insert comprising an air inlet port in fluid communication with the air inlet and an air duct in fluid communication with the air inlet port. The insert may include a water drain and the air duct and outlet may be in fluid communication with the water outlet, wherein the air inlet opening at a smaller distance than the water drain from the air inlet and in particular above the air inlet (ie further from the sole than this) may be located. Also, the air inlet opening may be located at a greater distance from the sole than the water drain, and the air inlet opening may be located at a greater distance from the sole than the air inlet.

The insert can be considered in a development as an element of the air inlet device, which is covered by a part of the air inlet device to the outside. Here, "outside" refers to a region of the air inlet device which, when attached to a shaft of a shoe, is farther from this shaft than an "inner" region of the air inlet device. Accordingly, an "upper" region is farther away from a sole thereof when the air inlet device is attached to a shoe than a "lower" region. Air and water can therefore first penetrate through the air inlet and then hit the depositor. While air can flow through the air duct and the air duct toward an air pumping device of the shoe to which the air inlet device is attached, water is discharged through the water outlet and the outlet. While air is sucked in through the air duct at the top, water drains downwards. Here, the water, depending on the design of the air duct of the insert, travel a certain way along the air duct of the insert until it runs over the water outlet to the outside. The air inlet opening may be located at a smaller distance than the water outlet from the air inlet and may in particular be positioned above the air inlet. Thus, air can easily pass from the air inlet to the air inlet port of the insert, while water can drain directly over the underlying water drain of the insert.

The air duct may be connected to the air inlet in the form of a siphon connection and / or the air duct of the insert may be connected in the form of a siphon connection to the air inlet and / or the air inlet opening in order to prevent water from entering the shoe via the air pump device and / or the electric operable ventilation device to avoid effective. Such a siphon connection has a partially U-shaped flow path for a fluid, in particular for the air entering the air inlet device. In particular, it can be provided that the air duct and / or the air duct of the insert a flow path (channel) having a U-shaped area, which has a smaller distance from the air inlet than to the above-mentioned outlet and / or water outlet, whereby a siphon effect can be achieved. This siphon action may result in air having a large volume corresponding to the volume of the air pumping device flowing down the air duct or air duct of the inserter toward an air pumping device provided in a shoe to which the air inlet device is attached on the other hand, which penetrates via the air inlet of the air inlet device, is deposited directly again via the outlet or the water outlet of the insert.

A combination of air pumping device, electrically operable ventilation device and air intake device as described above allows a particularly effective ventilation of the shoe interior.

Furthermore, a heating device can be provided for the air expelled into the interior, wherein the heating element is provided in particular as a ceramic heating element in the air feed pump or as at least one heating wire in the insole and / or on the outsole.

• Figur 1 zeigt Elemente eines Schuhs mit einer Lunge und einer Luftförderpumpe gemäß Ausführungsformen der vorliegenden Erfindung.
• Figur 2 zeigt Elemente eines Schuhs mit einer Lunge und einer Luftförderpumpe gemäß Ausführungsformen der vorliegenden Erfindung, wobei ein schaltbarer Umluft- und Frischluftbetrieb sowie ein Heizelement am Lüfter vorgesehen ist.
• Figur 3 zeigt eine Decksohle oder austauschbare Einlegesohle mit Heizdrähten und einem Temperatur- und Feuchtigkeitssensor.
• Figur 4 zeigt eine Decksohle mit einem Akku und einer Einrichtung zur Umwandlung kinetischer Energie in elektrische Energie.
• Figur 5 zeigt eine Lufteinlasseinrichtung, die Bestandteil eines erfindungsgemäßen Schuhs sein kann.
• Figur 6 zeigt eine weitere Ansicht der in Figur 5 gezeigten Lufteinlasseinrichtung sowie Strömungswege von Luft und Wasser.

Other characteristics and advantages of the invention will be apparent from the detailed but non-limiting description of embodiments shown with the aid of the attached drawings.

• FIG. 1 shows elements of a shoe with a lung and an air pump according to embodiments of the present invention.
• FIG. 2 shows elements of a shoe with a lung and an air pump according to embodiments of the present invention, wherein a switchable recirculation and fresh air operation and a heating element is provided on the fan.
• FIG. 3 shows a sock or replaceable insole with heating wires and a temperature and humidity sensor.
• FIG. 4 shows a sock with a battery and means for converting kinetic energy into electrical energy.
• FIG. 5 shows an air intake device, which may be part of a shoe according to the invention.
• FIG. 6 shows another view of the in FIG. 5 shown air inlet device and flow paths of air and water.

In the present invention, a shoe is provided with air pumping means and electrically operable ventilation means. This shoe allows ventilation of the inside of the shoe and thus of the foot of a user of the shoe in each state of movement, i. while walking, sitting, standing and lying down of the user. The air pump device may be mechanically operated during a walking movement of the user and through the same. The ventilation device can be operated at any time using previously stored and / or electrical energy generated during operation. In particular, depending on the embodiment, the air pumping device can direct fresh air into the interior of the shoe and the electrically operable ventilation device can direct fresh air from outside the shoe or air from within the shoe into the interior of the shoe.

FIG. 1 shows an embodiment of a shoe with an air inlet device 1, which is provided in the heel area, an air pump device in the form of a lung (a separately formed plastic reservoir) 5 and an electrically operable ventilation device in the form of an air feed pump 11. The air inlet device 1 may be provided in the form of a heel part which may be molded, glued or stitched to a heel region of a shaft of the shoe. The lung 5, when compressed as a result of a burden from the walking motion of a user of the shoe, can suck in air through the air inlet device 1 via the inlet valve 4 from outside the shoe. The sucked air can be guided or pressed via the outlet valve 6 and the air discharge device (air distribution element) 15, which may for example be formed as a channel in the sole 17 or may comprise plastic hoses with overhead openings. Inlet and exhaust valves 4 and 6 may be formed as one-way valves. In particular, the sucked air via the air discharge device 15 and discharge openings 16, for example a The insole provided above the air discharge device (the insole itself is in FIG. 1 not shown) are expelled inside the shoe. Here and in the further described embodiments, the air feed pump 11 may include or be replaced by a motor-driven fan. Alternatively, the air feed pump 11 may be formed as a diaphragm pump.

The air feed pump 11 is operated by an electric motor 10, which receives the required electrical energy from a battery 7 and is controlled by an electronic control unit 12. For charging the battery 7, a charging electronics 9 is provided. In the example shown, the charging of the battery 7 takes place by means of a device 8 for converting kinetic energy (the walking motion of a user of the shoe) into electrical energy, which may be provided below the lung 5 (ie closer to the sole 17). Any suitable means for obtaining electrical energy may be provided in or on the shoe. For example, an induction charging coil inductive charging device may be provided alternatively or in addition to the kinetic energy conversion device 8 for electrical energy. About a corresponding charging tray on which the shoe is placed, can be stored in the battery 7 via the inductive charging device electrical energy.

Furthermore, the shoe comprises a bypass line 2 for bypassing the lung 5. When the inlet valve 4 is closed, fresh air can pass directly via the bypass line 2 from the air inlet device 1 to the air feed pump 11. It should be noted that all of the valves described hereinbelow and hereinafter may be controllable, i. that closing and opening of the valves via the control electronics 12 or otherwise can be done. A user of the shoe can determine the ventilation mode via the control electronics 12. Thus, a wireless communication module 13 is provided which can communicate with an external device, such as a mobile phone of the user.

During a walking movement of a user of the shoe, the lung 5 is operated by relieving and loading the heel area. Outside a walking motion, for example when sitting, this is not possible. Then, a ventilation of the shoe interior using the electrically operable (operated) air pump 11 can take place. The control electronics 12 controls the operation of the air pump 11. So she can generally turn on and off the air pump 11 and about the speed of a fan and thus control the amount of air flow. The control by the control electronics 12 may, in accordance with a sensor (not in FIG. 1 shown), which may be integrated in the footbed of a sock of the shoe, provided measured data. The sensor may include a temperature and / or humidity sensor and transmit measurement data wirelessly or via a plug contact to the control electronics 12. For example, when a certain detected by the sensor temperature and / or humidity in the shoe interior, the control electronics 12, the air pump 11 or turn on a larger flow of air through the air pump 11 (for example, by increasing the speed of a fan) control. The control electronics 12 may be configured to turn on the air delivery pump 11 when a temperature value and / or humidity value measured by the sensor exceeds a preprogrammed limit, and may be configured to turn off the air delivery pump 11 when a temperature value and / or or humidity value measured by the sensor falls below a pre-programmed limit. As already mentioned, the air supply of the air feed pump 11 can be done bypassing the lung 5 via the bypass line 2.

About the control electronics 12, a user of the shoe can control the ventilation mode. He can make inputs using an external device, such as a mobile phone, and connected to the control electronics 12 wireless communication module 13. For example, the external device and the wireless communication module 13 may be configured to communicate with each other via Bluetooth or WLAN.

1. 1. Oberer und unterer Temperaturgrenzwert
2. 2. Oberer und unterer Feuchtigkeitsgrenzwert
3. 3. Ladezustand des Akkus und verbleibende Restenergie
4. 4. Schrittzähler
5. 5. Aktivitäts- und Inaktivitätszeiten des Nutzers
6. 6. Errechnung des Kalorienverbrauchs des Nutzers durch eine Gehbewegung
7. 7. Umschaltung von Außen - auf Umluft

For example, the user may use an app running on the external device to control the ventilation operation. The app can display the following settings and parameters and partially control the ventilation mode on the basic storage thereof via the control electronics 12:

1. 1. Upper and lower temperature limit
2. 2. Upper and lower humidity limit
3. 3. State of charge of the battery and remaining residual energy
4. 4th pedometer
5. 5. Activity and inactivity times of the user
6. 6. Calculation of the calorie consumption of the user by walking
7. 7. Switching from outside to circulating air

1. 1. Variation eines oberen und unteren Temperaturgrenzwertes
2. 2. Variation eines oberen und unteren Feuchtigkeitsgrenzwertes
3. 3. Zurücksetzen der unter 1. und 2. genannten Grenzwerte auf Werkseinstellung
4. 4. Direktes Ein- oder Ausschalten der Luftförderpumpe 11
5. 5. Umschaltung von Außen - auf Umluft und visa versa

In particular, the app can allow the user the following settings:

1. 1. Variation of an upper and lower temperature limit
2. 2. Variation of upper and lower humidity limits
3. 3. Resetting the limits specified under 1. and 2. to factory settings
4. 4. Direct on or off the air pump 11th
5. 5. Switching from outside to circulating air and visa versa

It can also be provided that during prolonged inactivity (no walking movement), which can be determined for example by the external device, the app asks if the air pump 11 should be turned on, and that the app emits a warning when the state of charge of the battery falls below a certain threshold.

It should be mentioned that the in FIG. 1 is provided in an alternative embodiment without lung 5, so that the air feed pump 11 is connected directly to the air inlet device 1.

In the FIG. 2 The embodiment shown differs from that used in FIG. 1 is shown, characterized in that optionally a recirculation or a fresh air operation is enabled. In particular, a switching device for switching from fresh air to circulating air or vice versa may be provided. When switching to fresh air, air can be sucked in from outside the shoe. This is not possible when switching to circulating air. It can also be provided that the switching device is switchable by means of a mobile phone app. For example, the mobile app can measure parameters, such as the outside temperature or humidity and turn on radio controlled in accordance with the measurement results switching device. The switching device may comprise one or more switchable valves.

As in FIG. 2 In one embodiment, a shoe that allows recirculation and fresh air operation includes, in addition to the elements of FIGS FIG. 1 embodiment shown a controllable, for example, electromagnetically controllable, valve 20 for switching from the recirculation to the fresh air operation and vice versa, and an additional air guide 21, for example in the form of a plastic tube, for the extraction of air from the shoe interior. The additional air guide 21 can run in the inner lining or between the upper leather and lining of the shaft, for example a quarter or the joint thereof, and can have openings in order to be able to guide air from the interior of the shoe. The lungs 5 and / or the air feed pump 11 can therefore suck air in the recirculation mode from the inside of the shoe via the air guide 21. About the air discharge means 15 and outflow openings 16, this air is then ejected back into the interior of the shoe.

In the fresh air mode, the valve 20 is switched so that air can be sucked in from the outside of the shoe by the lung 5 and / or the air feed pump 11 via the air inlet device 1. Switching the valve 20 from fresh air to recirculated air and vice versa can be effected by the control electronics 12 and / or an app running on an external device. The remaining operation with respect to switching on and off the air pump 11 may be that of FIG. 1 shown embodiment correspond.

Furthermore, a heating element 22 may be provided within or near the air delivery pump 11 to heat the air before it is fed into the interior of the shoe. When heated, the air is deprived of moisture, so that warm dry air is led into the interior of the shoe, which is advantageous at low outside temperatures. The above-mentioned app can also cause the switching on / off of the heating element 22.

Different in the FIGS. 1 and 2 shown elements may be provided in or on a insole or a replaceable insole of the shoe. In the in FIG. 3 As shown, a sock or interchangeable insole has a temperature and / or humidity sensor 14, an electrical contact 19 to the outsole, and heating wires 23 extending over the footbed 18 for heating the inside of the shoe. In the in FIG. 4 As shown, a sock has a temperature and / or humidity sensor 14 and heating wires 23 extending over the footbed 18 for heating the inside of the shoe. Furthermore, the insole has a wireless communication module 13, a charging electronics 9, an electronic control unit 12, a battery 7 and a device 8 for obtaining electrical energy, which is fed into the battery 7, on. The footbed 18 may be designed to be interchangeable.

The in the FIGS. 1 and 2 The shoe shown comprises an air inlet device 1. The interaction of the air inlet device 1 and the lung 5 or the electrically operated air pump 11 allows a very efficient and variable ventilation, as was not possible in the prior art. In the Figures 5 and 6 an air intake device 101 is shown, which is suitable for a shoe according to the invention. In principle, the air inlet device 101 may be provided at any suitable location at least partially above the sole of the shoe. For example, it may be provided in the lateral or rear upper collar of the shaft of the shoe, in the heel region of the shaft, in a lateral region of the shaft, or on a tab of the shoe. The air intake device 101 has the property of discharging water that enters through an air inlet of the air intake device. This water is therefore not sucked by an air pump device provided in the shoe and discharged into the interior of the shoe.

On the left side of the FIG. 5 the air intake device 101 is shown as a side sectional view and in the middle of the FIG. 5 as seen from the heel of a shoe to which the air inlet device 101 is attached shown. An exterior view of the assembled air intake device 116 is shown at the top right in FIG FIG. 5 shown. The air inlet device 101 comprises an air inlet 102a, via the air from the in the FIGS. 1 and 2 shown lung 5 or air supply pump 11 can be sucked. Furthermore, the air inlet device 101 comprises an outlet 102b, via which water, which optionally enters via the air inlet 102a, can be discharged outside the shoe. The air sucked in via the air inlet 102a is guided in an air duct 103 of the air inlet device 101.

Furthermore, an insert 104 is provided in the air intake device 101. This insert 104 has, as it is in FIG. 5 bottom right, an air inlet opening 105 and a branched air duct 106. Fresh air is thus sucked in via the air inlet opening 105, the air duct 106 and the air duct 103. Undesirably, water entering through the air inlet 102a is discharged directly through a water outlet 107 of the insert 104 and the outlet 102b.

Between the insert 104 and the air inlet 102a and the outlet 102b, a grid or mesh element 108 is provided in the embodiment shown, which can repel dirt. Within the air duct 103, a one-way valve 109 is optionally provided, to which a tubular air duct 110 is connected. The one-way valve 109 allows only an air flow from the air guide 103 to the hose-like air guide 110 and thus can the intake valve 4 in the FIGS. 1 and 2 replace or supplement shown embodiments. The air intake device 101 may also be formed without the valve 109.

The air intake device 101 of this embodiment enables the intake of large amounts of fresh air without water / moisture entering the shoe through the air inlet device 101. FIG. 6 shows two halves of the cut air inlet device 101, the section taken along the shaded area, and the possible air and water flows of the air inlet 101. The small arrows illustrate the air flow and the large arrows illustrate the water flow. Air flows through the air inlet 105 of the insert 104, the air guide 103, the air duct 106 of the insert 104 and the valve 109 in the tubular air guide 110 and can thus from a lung 5, as shown in the FIGS. 1 and 2 shown is sucked. A large volume of air corresponding to the pumping volume of the lung 5 or from the air feed pump 11 (see again the FIGS. 1 and 2 ) provided delivery volume can be so sucked through the air inlet device 101. On the other hand, water possibly entering through the air inlet 102a is discharged directly through the water outlet 107 and the outlet 102b. As can be seen, the air inlet 105 of the insert 104 should be located in the upper region of the air inlet 102a, or even slightly above the upper region of the air inlet 102a, whereby a siphon effect is reliably achieved, which reliably supports a separation of the water.

Although the present invention has been described with reference to specific embodiments, it should be understood that the embodiments are merely illustrative and not limiting of the scope of the invention. The method steps described can be carried out in any suitable order. It is any variations / modifications of and additions to the described embodiments possible. These variations, modifications and additions are within the scope of the invention as set forth in the following claims.

Claims (7)

1. Shoe having
   a sole;
   a mechanically operable air pump device (5) which is provided at least partially in an area of the sole and which is configured to suck in air from outside the shoe during unloading of the sole during the walking movement of a user of the shoe and to expel air for ventilation of an interior of the shoe during loading of the area of the sole during the walking movement of the user of the shoe so that said air pump device is operated by the walking movement of the user, wherein the mechanically operable air pump device is configured as a lung fitted into a recess of the sole or as a cavity formed in a recess of the sole; and
   an electrically operable ventilation device (11) which is configured to ventilate the interior of the shoe when the mechanically operable air pump device is not activated because the user does not execute a walking movement,
   wherein via an air feed device (1) which is connected to the air pump device and the electrically operable ventilation device, air can be guided from outside the shoe to the air pump device and the electrically operable ventilation device and
   wherein via an air removal device (15) which is connected to the air pump device and the electrically operable ventilation device, air can be guided from the air pump device and the electrically operable ventilation device into the interior of the shoe.
2. The shoe according to claim 1, in which the electrically operable ventilation device comprises a motor-operated fan or a motor-driven air conveying pump and an energy store (7) connected thereto.
3. The shoe according to claim 2, further comprising a charging device (8) for the energy store.
4. The shoe according to one of the preceding claims, comprising a switching device which is configured to switch on and/or switch off the electrically operable ventilation device.
5. The shoe according to claim 4, furthermore comprising an electronic controller and a device for measuring a temperature and/or moisture inside and/or outside the shoe and wherein the electronic controller is configured to control the operation of the electrically operable ventilation device by means of the switching device depending on a signal output of the device for measuring a temperature and/or moisture.
6. The shoe according to one of the preceding claims, further comprising an air inlet device (1) which is suitable for fastening on or partially in an upper of the shoe, an air inlet and an air guide in fluid communication with the air inlet and a device configured to release water which penetrates through the air inlet, and an outlet which is in fluid communication with the air inlet.
7. The shoe according to one of the preceding claims, which further comprises a heating device (22) for the air expelled into the interior.

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