DE102020124899A1 - Foot bath with light, especially blue light, as well as procedures for treating two feet - Google Patents

Abstract

A foot bath 2002 for irradiating parts of the foot with a light 2180 has a first tub 2010 and at least one light source 2210, 2210 run. The first trough 2010 is formed at least in some areas from a transparent material 2080 which has at least one trough light exit surface 2100, 2102 for light 2180 from the light source 2210, 2210. The first tub 2010 has a footwell 2008 for a pair of feet, at least two tub light exit surfaces 2100, 2102 at an angle to one another and at least one light entry surface 2110, 2112. The first tub as an inner tub and a second tub as an outer tub 2014, between which the light source 2210, 2210 is embedded, form parts of a housing 2006.

Description

The present invention deals with a foot bath with a light source by means of which selected parts of the foot can be irradiated with a light such as blue light (“blue light”) in a metered manner. The foot bath comprises a tub with a translucent area and at least one light source, preferably based on LEDs.

The present invention also deals with a method for irradiating two feet with light, in particular with blue light, in a suitable foot bath.

In other words, the present invention deals with a foot bath according to the preamble of claim 1 and a method for treating two feet according to the preamble of claim 17.

Technical area

Foot washing and foot baths are already documented in the Bible (see e.g. John, 13). It has been known since time immemorial that in order to improve the well-being of people with stressed feet, foot baths can be used for therapeutic measures. For some indications, dipping for a few minutes (e.g. less than 10 minutes) in warm water can relieve foot pain. Longer treatments often improve the effectiveness of the treatment. Many people can say that bathing for more than half an hour in specially prepared, well-tempered water can eliminate the discomfort caused by stressed feet, e.g. B. after long hikes or z. B. caused by an activity that lasts for hours while standing, such as waiting or serving in restaurants.

The footbaths that were originally made using bathing bowls have become more and more sophisticated over the years, as more and more variants have been created. It is now common to add various therapy devices and therapy facilities for foot treatment in addition to the actual water bath, which can be prepared in a bowl. Typical therapy supplements are to be briefly addressed on the basis of exemplary property rights.

In the US 6 568 000 B1 (Proprietor: HoMedics, Inc .; Patent Publication Date: May 27, 2003), various massage devices for a foot bath are described with which the blood flow to the feet is to be promoted by performing a massage with motor-driven rotating heads. The purpose of the rotational movement is to increase the blood flow to a foot exposed to the movement.

It is also known that compressed air can be blown into a foot bath with an air pump.

In addition to the massage devices mentioned above, the describes US 6 568 000 B1 also a foot bath, which is also equipped with a vibration device.

Infrared light sources can also be used to heat the feet, in short, light can be used to use the light waves incident on a foot to warm the skin of that foot.

With a single foot treatment in a separate pool z. B. the US 2010/0 324 611 A1 ( Applicant: Waverx, Inc .; Release date: December 23, 2010 ).

In all of the measures presented and the additional technical facilities compiled above, the primary objective is to make the handling of such water-filled foot bath facilities as simple as possible for a user who is not particularly trained. The usefulness of such a footbath can be increased in everyday use if, for example, similar to the description of DE 20 2017 102 521 U1 ( Owner: Beurer GmbH; Date of registration: May 29, 2017 ), the foot bath is equipped with a splash guard and a U-shaped handle bar.

If the various prior publications are summarized thematically, then footbaths are dealt with in those documents that have additional components, devices and facilities attached to the tub-like vessel or on this tub-like vessel that are supposed to be beneficial to the health of a user of such a footbath, e.g. B. by offering the user a pleasant treatment option.

In other words, the footbath device category now also includes numerous massage, treatment and well-being enhancement devices, through which such designs and such designs of footbaths can be made available that increase the effect of the footbath through additional physical or mechanical applications.

The publications compiled above are examples of how foot baths can be technically implemented. The attention when reading of the above footbath descriptions may be placed on the additional treatment devices. The discussions about these additional components, additional functions and additional implementations should equally be viewed as parts of the disclosure of the present description of the invention, so that the technical relationships of the additional functions do not have to be repeated again in the present description of the invention.

The well-being of a person can be impaired not only by higher loads and demands on the running apparatus of the person due to their feet, but also by diseases, especially of the feet. The medical literature lists numerous diseases of the feet, several of which are grouped under the terms “athlete's foot” and “nail fungus”. The keyword “athlete's foot” describes clinical pictures that are divided into at least three different forms of athlete's foot in the specialist literature, namely an infection of the spaces between the toes (interdigital: tinea pedis interdigitalis, interdigital mycosis), the most common form usually between toes four and five , an infection on the sole of the foot (squamous hyperkeratotic: tinea pedis, also tinea pedum) and an infection in the arch of the foot (vesicular-dyshidrotic). Other annoying, sometimes painful foot impairments are cracks, corneas and hyperkeratosis.

While on the one hand it can be seen from the patent literature that permanent stress on the legs and feet can be counteracted by water baths, other documents in the patent literature (above all) propagate dry foot baths that address one of the aforementioned clinical pictures (or several of the listed diseases ) dedicate. It can be concluded from this that many developers and manufacturers of foot baths differentiate between dry foot baths, if the person being treated has a diseased foot, and water foot baths, if the aim is to increase a wellness factor. However, combination devices are rarely presented in the patent literature.

State of the art

A foot bath intended to be used as a hydrotherapy device is in the CN 210 228 659 U (Owner: Huaxunyihao Guangzhou Health Maintenance Biological Tech Co. Ltd., date of registration: April 03, 2020). In the bottom and in the inner wall of a device body of the foot bath there should be water spray holes from which water should be sprayed onto acupuncture points on the legs, the legs belonging to feet placed in the foot bath. In the hydrotherapy device, the water should also be enriched with oxygen.

In addition to such footbaths, usually filled with water, so-called dry baths are also known. B. should be used advantageously in skin diseases.

According to the KR 101 720 894 B1 ( Owner: Kim Sang Woo et al .; Release date: March 30, 2017 ) the skin is dried with a stream of air in a tub in order to use drying, for. B. Fight athlete's foot. The continues to be advantageous KR 101 720 894 B1 exposure to green or blue-green light.

In the KR 102 017 987 B1 ( Owner: Oh Jae Hyun; Publication date: September 03, 2019 ) describes a device for a foot treatment in which feet can be treated by irradiation with invisible light. The device is also equipped with a fan to dry the feet. A humidity sensor measures the humidity inside a housing in which the feet are located. Settings of the device should be made with a control unit that can be influenced via a communication unit.

From the KR 101 656 407 B1 ( Owner: Univ Industry Foundation Yonsei Univ Wonju Campus; Release date: September 12, 2016 ) the result is a foot bath in which an irradiation wavelength can be selected with the help of suitable light filters.

A dry foot bath for the thermal treatment of feet, which is equipped with an electrical stimulator, is used in the KR 2020 0 043 554 A (Owner: Novumedical Corp .; Publication date: April 28, 2020). Through electrical muscle stimulation with adjustable frequencies, the muscles should be trained, pain alleviated and blood circulation improved.

In addition to direct light irradiation of the skin of the feet, however, according to the EP 3 060 189 B1 ( Owner: BSN medical GmbH; Publication date: May 09, 2018 ) Light can be used to release therapeutic substances in an immersion device, for which purpose a UV radiation source is to be used.

One system for treating a foot injury sustained by a person on a single foot is disclosed in the US 8 353 882 B1 (Owner: lyla Technologies, Inc; publication date: January 15, 2013). Part of the lower leg is to be introduced into the treatment chamber together with the foot. Then be the To close the treatment chamber. In the interior of the chamber z. B. water with antibacterial substances and oxygen are introduced; this with the aim of accelerating wound healing. The chamber also contains an array of diodes that emit ultraviolet light and an array of infrared light sources.

An LED array for treating athlete's foot is shown in the KR 101 777 166 B1 (Owner: Juoptores; publication date: September 11, 2017), which is supposed to generate ultraviolet light in the wavelength range between 100 nm to 300 nm and infrared light in the wavelength range from 600 nm to 900 nm.

In the WO 2020/050 536 A1 (Applicant: L & Meditech Co. Ltd .; Publication date: March 20, 2020) a tinea pedis treatment device is described in which both feet can be adjusted next to each other in separate chambers of the device, with LEDs arranged next to each other for the irradiation, the light in different Provide wavelength ranges are provided. Several exemplary embodiments are shown in the drawings, in which the toes in particular can be irradiated with light both from above and from below.

the US 2016/0 271 414 A1 (Owner: Pavel. V. Efremkin; publication date: September 22, 2016) deals with a treatment chamber for the treatment of foot, hand and nail diseases. The document lists four treatment steps that should be carried out simultaneously or alternately. In a first step, pathogenic germs are to be destroyed with high-energy radiation. In a second step, an aqueous solution, e.g. B. for the treatment of wounds, psoriasis and other skin diseases, the skin is washed. A third step is to use aqueous or gaseous substances to cool the skin and nails that have been warmed up by the treatment. In a fourth, optionally subsequent step, drying and thus removal of an applied solution should be carried out, in particular in order to improve the effect of the radiation and to avoid superficial overheating of the skin.

A foot bath according to the EP 1 818 038 A1 (Owner: SEB SA; publication date: August 15, 2007) is equipped with a projection in the middle so that one foot can be immersed in a bath on either side of the projection or footbridge. Light from a light source can emerge laterally from the web through a window. The light source can be equipped with a reflector. The radiated light should be beneficial to the relaxation of the user. For example, the window can be made of polycarbonate and part of the tank can be made of polypropylene. The size of the window should be between 1 cm ² and 10 cm ² . A multicolored luminescence diode is to be used as the light source, with which programs for generating color variations can be processed with the help of an electronic circuit. In one in the EP 1 818 038 A1 As an alternative declared embodiment, movable color filters are to be placed in front of a light source in order to produce color variations. It is also contemplated to use multiple light sources of different colors, e.g. B. LEDs with yellow, red and blue colors. The temperature of the bath should advantageously be displayed on the basis of the color tone of the light.

the EP 1 752 126 A1 ( Applicant: Body Detox AG; Release date: February 14, 2007 ) deals with an electrolysis foot bath system. A foot bath tub bottom of the foot bath should have a translucent area. A light therapy device, which is equipped with at least one light-emitting diode, should be located under this tub floor. It is also proposed, as a further equipment option, at the same place where the light therapy device is placed, to provide a magnet therapy device in the base plate of the foot bath. In addition, it is discussed in the document to manufacture the foot bath tub from opalized Plexiglas so that the floor appears white, but the light of the light therapy device can shine through for the therapeutic treatment. A patient should dip their feet into the water-filled tub so that their feet are as completely submerged as possible. An amount of water of 5 to 10 liters is sufficient for such a bathtub. The electrolysis foot bath system should also be equipped with a converter operating device.

Similar foot bathing devices with foot massage equipment and a blue light source were brought onto the market by Grundig Intermedia GmbH with the product designation FM8720 and with the product designation FM4020. These two products each differ in the arrangement of their blue light sources.

Attempts to increase the efficiency, the yield and also the uniform distribution of the light are known from other areas of technology. the EP 3 002 508 A1 (Applicant: Evonik Röhm GmbH; publication date: April 6, 2016), the EP 3 208 572 B1 (Patent owner: Texmag GmbH; patent publication date: 13.06.2018) and the WO 2016/142 065 A1 (Applicant: Rehau AG + Co; publication date: September 15, 2016) deal with light guide plates through which a light introduced into the light guide plate can be better distributed.

The two dissertations, on the one hand that of the Dipl.-Ing. Tobias Bockrocker with the title "Technology for light management in organic light-emitting diodes" and on the other hand that of Rolf Danzebrink with the title "Production and characterization of microstructured coatings using ink-jet and pad printing" show that microstructures can be used to decouple light from light-conducting bodies such as B. OLEDs, can be improved.

The aforementioned publications, brochures, treatises and written work and their names are considered to be fully incorporated into the present description of the invention. This is to avoid having to discuss again and again generally known relationships, such as the provision, heating and treatment of the footbathing water, but rather being allowed to regard these publications as also defined for the present invention by referring to those publications.

Task

The benefits of a foot bath should be particularly high. Ideally, a foot bath is designed in such a way that it can carry out multiple treatments and measures. The question therefore arises as to whether, based on the already known foot baths, a further development is possible which results in a further increase in the efficiency of a corresponding foot bath.

Description of the invention

The object according to the invention is achieved by a foot exposure bath according to claim 1; a suitable method for light irradiation can be found in claim 17. Advantageous developments can be found in the dependent claims.

A foot bath includes a space in which at least one foot of a user of the foot bath, advantageously both feet of the user, can be placed. The space is advantageously inside a tub. Such a tub can enclose the room. In this case the tub forms an outer boundary of the room.

Is the room designed in such a way that it contains a liquid such as B. a bath water, can be stored and kept leak-proof, it can also be referred to as a foot bathing room. In general, the room can also be referred to as a footwell. By adding “bath” to the term “foot bath room”, it can be expressed that the space for the feet, i.e. the foot space, is intended and designed for the creation of a foot bath.

The foot bathing room should advantageously be dimensioned so large that two feet, more precisely two feet of a person, can be placed in the foot bathing room. In addition, it should be possible to give a foot bath liquid into the room. The tub should therefore be liquid-tight, in particular waterproof. Soapy water can be poured into a waterproof tub. During operation, the foot bathing room is conveniently filled with a foot bathing liquid.

In addition, the foot bath offers at least one light source which is positioned in the foot bath for light introduction into the foot well. The light can illuminate at least part of a foot of the footbath user.

The light source should be able to emit light of a selected wavelength. To put it more precisely, it is a particularly advantageous light source if the light source can emit a (entire) spectrum of selected wavelengths. It is particularly advantageous if monochromatic light can be emitted by the light source at a (specific) point in time. Tests have shown that blue light is particularly advantageous or can be beneficial to the health of a user. It is therefore advantageous if the light source is able to emit blue light of a selected wavelength in the sense of monochromatic light.

Another component of the foot bath is a control unit. The foot bath includes a control unit. The control unit controls the operating current, i. H. the electrical current with which at least one light source can be operated. Several light sources can also be present in the foot bath for stronger lighting or targeted lighting. The control unit switches on the one or more light sources. The control unit can advantageously be designed in such a way that it can set the brightness, the intensity or other light parameters.

The foot bath is designed to enable treatment of at least one foot both by means of a foot bath liquid and by means of a light source.

The foot bath, into which a liquid such as soapy water can also be filled, is advantageously designed in a certain way. To this end, selected aspects are to be addressed.

In other words, the foot bath is designed to irradiate one or more selected parts of a foot with light composed of selected wavelengths. Light with selected wavelengths can be in the form of monochromatic light. One form of monochromatic light is blue light or blue light. The foot bath should - in one operating state - irradiate a part of the foot with light. For this purpose, the foot bath has at least one light source.

Various light-producing components come into consideration as light sources. LED strips that can be assembled to form LED arrays or can be electrically connected to one another in order to form one or more LED arrays are particularly advantageous. The (so-called classic) semiconductor LEDs, but also organic LEDs (OLEDs), can be used to emit blue light.

The footbath is advantageously a tub-in-tub system, that is, a first, in particular inner, tub is surrounded by a second, in particular outer, tub, so that the footbath is formed by a double-shell housing.

The inner tub is at least partially made of a translucent material. B. polymethyl methacrylate (PMMA) can be used. The light from the at least one light source can reach the interior of the foot bath through the translucent areas and locations of the inner tub.

The footwell is advantageously dimensioned so large that a pair of feet can be placed in the footwell. The pair of feet, when placed in the foot bath, is framed by the inner tub.

It is advantageous if the first trough has at least three trough light exit surfaces. These three tub light exit surfaces can be arranged at an angle to one another.

In addition, the inner tub should have a light entry surface through which light can enter the tub itself.

The first tub and the second tub result in a double-bottomed and a double-walled edging for a footwell that closes off at the bottom. The second tub encloses the first tub. A cavity is provided between the two tubs which can be used by the light source installed in the cavity. The light source is embedded between the two tubs, the inner tub and the second tub, which thus represents the outer tub to the first tub.

The light that comes from the light source is introduced into the inner tub via the light entry surface. The inner tub has selected areas where the light that passes through the inner tub can exit again.

With such a tub-tub system, it can also be said tub-in-tub system, it is possible, with an extremely small number of light sources or LEDs, to provide targeted lighting, in particular of foot areas, which pose an increased risk known from skin diseases.

If there are two feet in the foot bath, the foot bath having already been described in many aspects and respects by the statements made above, the control unit can activate the light or the light source. At a first point in time, light of a blue wavelength is emitted. The light with a wavelength that is assigned to the blue area is guided in sections inside the inner tub and exits the inner tub at selected points, preferably in the vicinity of the foot parts to be irradiated.

The exit of the light from the inner tub can be promoted by special structures on or in the inner tub. For example, microlens structures can be built into the surface of the inner tub at selected locations, e.g. B. be incorporated in the toe area or in the toe area. Other areas of the first tub can be configured to be opaque.

Conscious lighting control helps ensure that feet can be treated efficiently and effectively with less electrical energy.

Although the tub is filled with a fluid, various tests have shown that the fluid allows the blue light to pass (almost) unhindered to the areas to be treated on the foot or leg of the user of the footbath. If the fluid irradiation is briefly interrupted, i.e. if the fluid is at rest or if it is significantly calmer than in the fluid irradiation phases, no air inclusions in the fluid prevent the targeted propagation of the blue light. The change between irradiation phases and rest phases improves the irradiation on the area to be irradiated, e.g. B. on the inter-toe area.

Advantageous refinements and developments are set out below which, viewed individually, both individually and in combination, can likewise reveal inventive aspects.

In one embodiment, only a single LED array can be present. The LED array can be arranged on a bowl of the foot bath.

However, the LED array can also be one of several LED arrays. In the alternative embodiment, such a collection of LED arrays can be arranged on a shell of the foot bath in order to emit light from there as a light source.

The LED array (s) is / are used to supply light.

The carrier for the LED array (s) can be a shell of the foot bath, in particular an outer shell of the foot bath.

So it is B. possible that two LED arrays arranged next to each other are placed on the shell. Two LED arrays arranged next to one another are - in such a case - arranged inside the outer shell. If at least two LED arrays are present, one LED array can be provided to irradiate a left foot of a user, while the second LED array is provided to irradiate a right foot of a user with blue light.

It is particularly advantageous if an LED array is spatially designed in such a way that it comprises at least two blue light LEDs for each individual toe. Such an LED array is equipped with at least ten LEDs, two of which are each aligned for illuminating a toe or the adjacent area. The alignment of the LEDs should point to the space between the toes or to several spaces between the toes. This enables the space between the toes to be exposed.

Some skin diseases, such as B. Athlete's foot, like to attack the spaces between the toes. If the light irradiation is directed onto the spaces between the toes, the probability of the treatment being successful becomes greater or better or a more targeted and faster-acting treatment is made possible.

The LEDs of an LED array can also be arranged in such a way that individual LEDs are intended to illuminate the spaces between the toes, while other, so to speak second, LEDs are arranged to illuminate or illuminate a distal nail groove, an onychodermal band or a nail plate.

The foot bath can be designed in such a way that the light source is arranged on the other side of the tub. The tub itself should be translucent, at least in selected areas. This allows light to enter the tub, i. H. into the interior of the tub.

The light from the light source enters the tub on one side. In fact, a certain area in the foot bath room should be illuminated by the light. Thus, light from the light source should reach the foot bathing room through the tub, whereby the entry point and the exit point of the tub do not have to be directly opposite. The light entry can take place at a different point than the light exit on the side facing away from the light entry.

It is advantageous if the light source is arranged behind a first area, the trough being able to be subdivided into different areas. The light source should give light to the tub. The light from the light source that has entered the tub should emerge at an area in front of which - in the case of proper or normal and customary operation - a user's toes rest. The foot bath room has a toe area. In the case of some skin diseases in the foot area, it is particularly important if the tips of the toes are treated with monochromatic light, especially blue light. There is an area for toes in the foot bath. This area should be arranged or placed in such a way that the tips of the toes come to rest in front of the first area inside the foot bath. The tips of your toes should be immediately in front of the first area during regular operation.

In the case of light sources that work with directed light, a main beam direction of the light source can be determined. The light source shines a light of a selected wavelength in the main beam direction. At least some of this light should be oriented along a tub-bottom surface towards a heel-to-foot receiving area.

If there are two feet in a foot bath that can direct both blue light (a so-called “blue light”) and a jet of fluid onto at least one of the two feet, a control unit can process various types of control programs. A particularly suitable control program consists in shining blue light on the feet in a first time window and allowing the fluid that is used for the actual liquid bath to act in a radiation-like manner on at least one of the feet during a second time window. In such a case, the control unit works with alternating applications or the alternating use of blue light and a fluid jet. At a first point in time, blue light affects the foot. And a jet of fluid acts on the foot at a second point in time. The change between the applications can be carried out several times, so that after a light irradiation, with z. B. blue light, a certain phase takes place a fluid irradiation to the exposure to light, e.g. B. turn with blue light, connects.

From a further perspective, the following aspects can also be highlighted.

If the footbath is not only a light footbath, but also a (classic) footbath with a treatment liquid, such as well-tempered water (e.g. adjustable to the exact degree between 25 ° C and 42 ° C), then advantageously at least the first tub is the inner tub, a waterproof shell that holds the fluid, e.g. B. can hold back a foot bath fluid such as soapy water. In an alternative or additional embodiment or use of the foot bath, provision can also be made to prepare a liquid with essential oils as the foot bath liquid. Due to the different viscosities between ultrapure water, soapy water and various essential oils, it is particularly advantageous if the first tub is tight.

The first trough is advantageously designed, at least in some areas, in such a way that it can be used as a light guide body. The function of the light guide body can be used, for. B. to provide a heel area or a toe area with light.

A light entry surface of the first trough is designed for coupling in light from the light source. This is z. B. through a particularly clear window.

The first tub can also be equipped in selected areas with a surface that allows total reflection. The internal reflection in the first trough is such that the first trough performs a total reflection at these selected points. The light is passed on - thanks to total reflection.

The arrangement of at least one light inlet surface and of at least three light outlet surfaces can be carried out in such a way that the light inlet surface and the light outlet surfaces are all positioned differently from one another. The light entry surface is in a different area than the light exit surfaces. The various surfaces on the inner tub can be positioned offset from one another.

In order to ensure that total reflection actually takes place in the selected areas, the light entry surface can additionally be equipped with a polarization filter or a polaroid filter, e.g. B. be equipped with an input lens. The polarization filter or the polaroid filter covers the light entry surface. The polarization filter can be designed for selected wavelength ranges, e.g. B. pass through wavelengths from a wavelength range between 400 nm and 460 nm.

Further aspects are to be explained below.

The light source can be more than two, e.g. B. punctiform, light generating elements such as LEDs include. To clarify, it should be emphasized that when an LED array is referred to as a light source, similar structures with LEDs are also meant. If the term “LED” is used, it also means LED strips and LED sub-arrays, depending on the context. For example, an LED array can be a right foot array and an LED array can be a left foot array.

An LED array is a group of several LEDs that are arranged next to one another and aligned with their emission direction. A part of the body is to be irradiated through these LEDs.

In a first light emission state, all LEDs of the array can be switched on at the same time. In a second light emission state, a first group of LEDs can be switched on to emit light. A second group of LEDs can be switched to dark or off. In a third light emission state, the first group of LEDs can be switched to dark or off and the second group of LEDs can be switched on to emit light. In an advantageous embodiment, the first group and the second group can each emit light in a different wavelength range, such as B. Blue light and UV light.

An LED strip advantageously comprises at least three LEDs. LED strips can differ from LED strings in that the LEDs in an LED string can be controlled individually, ie independently of one another. Another name for such linear arrangements of LEDs is LED strips. LED strips can be used in which different LEDs follow one another in a linear sequence, such as blue light LED, UV-A-LED, UV-B-LED and UV-C-LED. Such a sequence can be continued with a blue light LED or an infrared LED or a repeating sequence. Another example of a suitable LED strip is an LED strip that has at least two blue light laser LEDs. If LED strips are used, at least two LED strips preferably form an LED array. Linear LED arrangements, such as strings, strips or ribbons, which are attached to a narrow, flexible circuit board, are particularly advantageous. The flexible circuit board can be placed against curvatures, such as concave bulges, of an LED carrier. This means that different light sources or LEDs can be used emitted light can be concentrated on a foot area such as a toe area. Continuing this design approach, it is also possible that several, z. B. three, differently oriented LED arrays are formed by parallel juxtaposed and bent or folded strands. Thus, for. B. three LED arrays can also be formed as substructures of continuous LED strips or LED strips, preferably several such linear LED groups are arranged next to one another. The light source from LEDs is formed in particular by the electrical or electronic interconnection of the LEDs or the LEDs arranged in groups.

The combinations and exemplary embodiments presented above can also be viewed in numerous other connections and combinations.

It is thus possible for LEDs of different types, a blue light LED, a UV-C LED and a white light LED to be combined to form an LED assembly.

Figure list

• 1 ein Fußbad mit einer flachen Wanne zeigt,
• 2 ein Fußbad mit einer tiefen Wanne zeigt und
• 3 ein weiteres Beispiel eines Fußbads mit einer tiefen Wanne zeigt, das für die Lichtbestrahlung der Füße mit einer geringeren Anzahl von LEDs auskommt als die Fußbäder von 1 und von 2.

The present invention can be understood even better if reference is made to the accompanying figures, which exemplify particularly advantageous design options without restricting the present invention to these, wherein

• 1 shows a foot bath with a shallow tub,
• 2 showing a foot bath with a deep tub and
• 3 shows another example of a footbath with a deep tub that manages with a smaller number of LEDs for illuminating the feet than the footbaths of FIG 1 and from 2 .

Figure description

One for irradiating two feet (in 1 not shown) trained foot bath 2 is in 1 shown. A foot bath designed for the irradiation of two feet 1002 that has a larger volume for a liquid than the foot bath 2 according to the 1 has is in 2 shown. And a foot bath suitable for irradiating two feet 2002 that compared to the foot baths 2 and 1002 (after 1 or after 2 ) manages with a smaller number of LEDs is in 3 shown. 1 , 2 and 3 are described collectively, with identical or highly similar components, parts, and components shown in the figures 1 , 2 and 3 are shown, each differ by the number 1000. Drawing in 2 Parts, components and parts shown can also be changed accordingly using the equivalent graphic elements, components and parts in 1 to be viewed as. In addition, graphically represented elements, components and assemblies that are in 2 can also be seen in 3 should be considered, provided that the same reference numerals, but increased or decreased by 1000, are on the lookout for. In other words, the footbaths depicted were to promote clarity 2 , 1002 , 2002 in the 1 , 2 and 3 The same reference numerals are used in each case. Different reference symbols have been entered for special features of the respective exemplary embodiments, so that explanations of the other figures may also be used to understand further, graphically illustrated design features of an exemplary embodiment shown in one figure.

Depending on the embodiment (see 1 until 3 ) of the foot bath 2 , 1002 , 2002 A first LED array serves as the light source or its operating state 190 , a second LED array 192 , a toe LED array, 194 , 1194 , 2194 , a footplate LED array 196 , 1196 , 2196 , a top of the foot LED array 198 , 1198 , 2198 , at least one first LED strip 210 , 210 ^l , 1210 , 2210 , 2210 ^l , at least a second LED strip 212 , 212 ^l , 1212 , 2212 , 2212 ^l , at least a third LED strip 214 , 214 ^l , 1214 , 2214 , 2214 ^l An LED string or an LED strip or a corresponding OLED surface can also be used as the LED strip, a blue-light LED arrangement 220 , at least one first blue light LED 222 , at least one second blue light LED 224 and / or at least one UV-C LED 236 .

The foot bath 2 can also be referred to as a foot adjuster. Several components of the foot bath 2 are in 1 shown side by side. The foot bath 2 includes a housing 4th , the end in a box-like body, the control unit 270 empties. On the control unit 270 is a supply cable 280 connected for supplying electrical energy from a power grid (not shown). In interior walls, like the interior wall 28 of the housing 4th , which can also be referred to as the outer housing, and in a base area at the foot 18th of the housing 4th is an LED carrier 14th integrated. In the LED carrier 14th are the first LED strings on the top, like the LED strings 212 , 212 ^l , insertable, with the LED strings 212 , 212 ^l UV-C LEDs, such as the UV-C LED 236 , exhibit. The first LED strings 212 , 212 ^l serve to irradiate the top of the foot (not shown), in particular the top of the toe. The first LED strands 212 , 212 ^l Opposite are second LED strings on the bottom side, such as the LED strings 214 , 214 ^l , arranged. The LED strands 214 , 214 ^l are each in their own receiving channel 24 insertable. Admissions like that Receiving channel 24 , are used to fix a single LED string at the side, such as the LED string 214 . The LED strings on the bottom 214 , 214 ^l each have a large number of blue light LEDs, like the blue light LEDs 222 , 224 , which are used to irradiate the underside of the foot or are oriented towards the underside of the foot. At right angles between the first LED strings 212 , 212 ^l and the second LED strings 214 , 214 ^l LED strips stretch like LED strips 210 , 210 ^l . For covering the LED strips 210 , 210 ^l , 212 , 212 ^l , 214 , 214 ^l serves a tub 10 , the envelope-like, made of a transparent or translucent material 80 is made, formed. The tub 10 has two foot rests 40 , 42 which are drawn by a line outline as recessed ground contact areas. In the recesses of the footrest 40 , 42 a therapeutic liquid for the feet can be introduced. The tub 10 prevented by its tightness and its stiff edge as a shell 6th leakage of the liquid.

Thus, the foot bath 2 , this in 1 what can be seen is a blue light LED arrangement 220 on, which is used for foot irradiation from three spatial directions. A toe LED array 194 , also called the tip-toe LED array 194 can be designated, has a light emission direction approximately parallel to the footrest 40 , 42 . A left side, separate from a right side half of the toe LED array 194 controllable array half can also be used as the first blue light LED array 190 are designated. Array halves can be controlled independently of one another. A light emission direction is understood to mean, in particular, a center axis of a light cone of an LED. A footplate LED array 196 is located under the foot rests 40 , 42 . Its light emission direction is approximately parallel to the toe-tip LED array 194 . Because the transparent material 80 Is compressible, can also be from a footbed 44 be spoken, that for the Fußstellflächen 40 , 42 is provided. That is, feet that stand up sink due to the weight of a person (not shown) on the footrest surfaces 40 , 42 - depending on body weight - approx. 1 centimeter, which results in a pleasant feel. The translucent tub 10 is out of the case 4th removable and can, for. B. if their light exit surfaces 100 , 102 , 104 dull or damaged must be replaced. A top of the foot LED array 198 is smaller than the footplate LED array 196 and arranged opposite this. In other words, there are LED arrays between the footprints 196 and top of foot LED array 198 the toes of two feet adjustable. A separately controllable half of the back of the foot LED array on the right 198 can be used as a second blue light LED array 192 are designated. The toe LED array 194 extends along an array spacing 188 between footplate LED array 196 and top of foot LED array 198 . The LED arrays 194 , 196 , 198 are sold separately in 1 drawn in to clarify their arrangement in space with respect to one another. The footplate LED array 196 , could be numbered as the third blue light LED array.

The footbath shown broken down into some components 1002 according to 2 has a housing 1004 that as an LED carrier 1014 serves and in the one bowl 1006 can be used. The foot bath 1002 has a control unit 1270 on that by a power cord 1280 is supplied with electrical energy. The shell 1006 is as an inner tub 1010 educated. The case 1004 points in its base 1018 groove-like depressions 1020 , 1022 on. In such groove-like depressions 1020 , 1022 are LED tapes, like the LED tapes 1210 , 1212 , 1214 , applicable. First LED strips 1210 are shorter than second LED strips 1212 . Second LED strips 1212 are shorter than third LED strips 1214 . This makes it possible to use LEDs more efficiently. The LEDs on the LED strips 1210 , 1212 , 1214 are equidistantly arranged blue light LEDs. Thirteen first LED strips, like the LED strip 1210 , together form a toe LED array 1194 . Fourteen second LED strips, like the LED strip 1212 , together form a back of the foot LED array 1198 . Nineteen third LED strips, like the LED strip 1214 , together form a footplate LED array 1196 . In an assembled state of the foot bath 1002 , this in 2 seen is the toe LED array 1194 , on which the spacer arrangement is to be explained, between an inner wall 1028 of the housing 1004 and an outer wall 1038 the inner tub 1010 that also called the first tub 1010 can be called embedded. The inner tub 1010 has an extension 1016 in one direction of extension 1026 that is greater than a tub depth 1016 ^l . About the tub depth 1016 ^l the side walls extend like a first side wall 1050 and a second side wall 1052 , from an approximately square tub floor area 1036 from up. The tub floor area 1036 has a size that is sufficient for two feet to stand up. From the bottom of the tub 1036 and the depth of the tub 1016 ^l the result is a voluminous foot bathing room 1008 for the absorption of a liquid. The foot bath room 1008 is from an inner wall of the tub 1054 and includes a pair of feet receiving area 1060 . The pair of feet receiving area 1060 takes up less than half the foot bath space 1008 so that a liquid filling up to half the depth of the tub 1016 ^l generally sufficient for bathing the feet. At the pair of feet receiving area 1060 include a toe receiving area 1030 from one in the extension direction 1026 spaced heel receiving area 1032 distinguishable. The tub floor area 1036 has rounded corners and edges that make cleaning easier.

A place for toes 1064 with associated spaces between the toes, such as the space between the toes 1066 , as well as a foot heel receiving area 1062 belong to the pair of feet reception area 1060 . A the tub floor area 1036 forming tub bottom 1034 is intended for a liquid-tight embedding of the foot surface LED array 1196 to train. To the transparent inner tub 1010 includes an attachable, transparent inner cover 1172 ^l that there in the direction of extension 1026 less than half the extension 1016 the inner tub 1010 , especially in the connection area liquid-tight, covers. Between a cover 1172 of the housing 1004 and the inner cover 1172 ^l is the arch of the foot LED array 1198 in an assembled state (not shown) of the foot bath 1002 hermetically sealed. Under the cover 1172 , 1172 ^l is the toe receiving area 1030 the first tub 1010 . Toes (not shown) can inter alia through an inner wall of the cover 1174 are irradiated through with blue light. The irradiation can also be carried out through the inner wall of the tub 1054 through and through the bottom of the tub 1034 take place through. The light is switched on via a remote control (not shown) or with the aid of sensors (also not shown) of the control unit 1270 possible. The case 1004 has conductor tracks (in the perspective according to 2 not visible) on the electrical connection of the LED arrays 1194 , 1196 , 1198 with the control unit 1270 to serve. The arch of the foot LED array 1198 and the toe LED array 1194 have an angle of attack 1202 to each other. A corresponding angle of attack, like the angle of attack 1202 , is between the toe-toe LED array 1194 and the footplate LED array 1196 available.

A foot bath 1002 has a partially translucent tub 1010 to accommodate two feet in a foot bath room 1008 on. At least one light source 1194 , 1198 is used to emit light with a selected wavelength. Through a control unit 1270 is an operating current of the light source 1194 , 1198 controllable so that light from the light source passes through the tub 1010 can shine in the foot bath room. The light source is behind a first area 1030 the tub 1010 arranged, in front of which there is an area for toes 1064 with the tip of your toes on at least one of your two feet. The light source 1194 , 1198 has a main direction of radiation for the light, which is along a tub bottom surface 1036 with the adjustment area to a foot heel receiving area 1062 is oriented towards the tub. In an advantageous method, blue light is applied to an area which is intended to accommodate a part of the foot. The control unit 1270 controls the blue light and a fluid irradiation in the foot bath in alternation with time.

In 3 is a foot bath 2002 shown that is an inner tub 2010 owns. The inner tub 2010 is as a light guide body 2160 educated. On the inner tub 2010 is a cover 2172 ^l can be put on, which also has a light guide body 2160 ^l includes. The light guide body 2160 , 2160 ^l consist of a transparent material 2080 , 2080 ^l . The transparent material 2080 , 2080 ^l has an absorption coefficient which is so low that over a distance of e.g. B. 1 meter of light of at least one wavelength range, such as an infrared light range, a red light range, a blue light range and / or a UV light range, can pass through with almost no attenuation (if the usual coupling losses are disregarded). The transparent material 2080 , 2080 ^l can also be called a glass-like material due to its optical properties. Internally 2012 the material of the tub body, such as the inner tub 2010 , light can propagate without absorption until it reaches a scattered area 2082 , 2082 ^l or a decoupling element (not shown) meets. The inner tub 2010 has first light entry surfaces, like the light entry surface 2110 on which a toe LED array 2194 can be arranged. The toe LED array 2194 consists of two first LED strips 2210 , 2210 ^l . For coupling light into the light guide body 2160 are the first two LED strips 2210 , 2210 ^l with a main emission direction, like the main emission direction 2260 , aligned. The LED strips shine more precisely 2210 , 2210 ^l Their light is directed in such a way that their respective main direction of emission crosses within a total reflection angle. Through multiple reflections in the light guide body 2160 the light spreads laterally and arrives as emitted light 2180 with a main emission direction, like the main emission direction 2182 , of the first light entry surfaces, like the first light entry surface 2110 , in the area of toe exposure areas 2106 . The main direction of radiation 2182 can also be used as the light exit direction 2182 are designated. The light 2180 is at the first tub light exit surface 2100 decoupled. Below the inner tub 2010 is a footplate LED array 2196 arranged the two third LED strips 2214 , 2214 ^l includes. The third LED strips 2214 , 2214 ^l are with a main direction of radiation 2260 ^l for coupling light into the light guide body from the bottom 2160 aligned. The third LED strips 2214 , 2214 ^l shine light towards each other. Lateral due to multiple total reflection in the light guide body 2160 will propagate light at light scattering nuclei, such as the light scattering nuclei 2082 , 2082 ^l , decoupled. Through the bottom of the tub 2034 or the tub floor area 2036 irradiation light thus passes through 2180 ^l with a main beam direction 2182 ^l off to the foot bath 2002 feet to be adjusted or the soles of their feet (not shown). The main direction of the beam 2182 ^l can also be used as the light exit direction 2182 ^l be called because it is a is the middle direction with which the light passes the light guide body 2160 leaves. Any light scattering core 2082 , 2082 gives its own main ray direction, like the main ray direction 2182 ^l and its own decoupling fraction of the incident light. Second light entry surfaces, such as the light entry surface 2112 , are laterally offset to the second tub light exit surfaces, such as the tub light exit surface 2102 . On an opaque surface 2154 the first tub 2010 no light can escape. In addition, a light outlet becomes the footwell 2008 through a covering layer 2150 prevented. Light that is inside 2012 the first tub 2010 , ie in their transparent material 2080 , spreads, can be evenly distributed in the footwell next to the covering layer 2008 or get to the feet (not shown). The feet are through a tub inlet opening 2176 through into the footwell 2008 collectable. One also as a light guide body 2160 ^l trained inner cover 2172 ^l is on top with a dorsal LED array 2198 combined. The arch of the foot LED array 2198 includes several blue light LEDs on two similar LED strips 2212 , 2212 ^l are arranged (in the illustration according to 3 covered). The LED strips 2212 , 2212 ^l are for the coupling of light through third light entry surfaces, such as the light entry surface 2114 , through into the light guide body 2160 ^l in, each with a main emission direction, like the main emission direction 2260 ^l , aligned. In the cover 2172 ^l incoming light spreads through its transparent material 2080 ^l laterally through multiple total reflection. The light is called irradiation light 2180 ^l coupled out with several main beam directions. One main beam direction 2182 ^l exits through the third tub light exit area and reaches each foot. A light emerges from the tub light exit surface 2104 the end. The light arrives at a foot and has a direction towards the toe exposure areas, such as the toe exposure area 2106 . The light is coupled out at different points. For decoupling at the third tub light exit surface 2104 existing microlenses are in the perspective view; as in 3 is shown obscured. The inner, first tub 2010 is together with the inner cover 2172 ^l and the LED arrays 2194 , 2196 , 2198 in one housing 2004 made of an elastic material can be used. The case 2004 is made of an elastic material.

The case 2004 is used as a second tub or outer tub 2014 designed and serves in particular as an LED carrier. In addition, the housing 2004 a reflector layer on the bottom 2152 to improve the light output for the irradiation of the feet. Also the inner tub 2010 is on its outer wall in the area of the toe-side rounded corners with a reflector layer as a light-reflecting surface 2156 Mistake. The bath inlet opening 2176 is a covering bridge area 2170 of the housing 2004 upstream. As an extension of the bridge area 2170 the case sits down 2004 boxy proceed to a control unit 2270 to include. A power cord goes there 2280 away.

A foot bath 2002 for irradiating parts of the foot with a light 2180 has a first tub 2010 and at least one light source 2210 , 2210 ^l on. The first tub 2010 is at least partially made of a translucent material 2080 formed, the at least one tub light exit surface 2100 , 2102 for light 2180 the light source 2210 , 2210 ^l having. The first tub 2010 has a footwell 2008 for a pair of feet, at least two trough light exit surfaces at an angle to one another 2100 , 2102 and at least one light entry surface 2110 , 2112 . The first tub as an inner tub and a second tub as an outer tub 2014 , between which the light source 2210 , 2210 ^l is embedded, form parts of a housing 2006.

The design options shown in the individual figures can also be combined with one another in any form. For example is a tub 1010 with their cover 1172 ^l instead of the tub 10 in the housing 4th according to 1 applicable. However, LED strips that are in 1 are shown with the foot bath 1002 , this in 2 shown can be combined. In addition, light guide bodies, such as the light guide bodies 2160 , 2160 ^l according to 3 , with the foot baths according to 1 respectively. 2 can be combined to e.g. B. using microlens optics to focus light on areas of the foot that are particularly susceptible to infections.

Based on the foot bath 2 or the foot bath 1002 or the foot bath 2002 Further advantageous embodiments are possible, depending on the desired method of treatment. A foot bath, be it as a pure light bath or as a light bath in combination with a liquid bath, such as an oil or water bath, can only be equipped with LED strips with blue light LEDs. Alternating blue-light LEDs and red-light LEDs can be arranged on the LED strips or they can each be used next to one another on an LED strip for a type of LED with LED strips of different light colors. The LEDs are preferably located on circuit board strips, so that such a light source can also be referred to as an LED strip for short. It is also possible to use infrared LEDs instead of red light LEDs in order to heat the feet better. Further advantageous embodiments have LED strips with UV LEDs on all light-emitting surfaces. Such a foot bath with UV-C LEDs is preferably combined with a foot bath bag or a foot bath cover (not shown) or used therein in order to prevent UV-C light from being shown to a viewer or a user e.g. Am the eyes fall. In addition to therapeutic skin improvements, UV light can also cause skin tanning.

It is thus possible to arrange even more LEDs, more generally speaking, more illuminants, on an LED carrier.

The design options shown in the individual figures can also be combined with one another in any form.

So it is possible to adjust the volume for the fluid, depending on the planned application.

List of reference symbols

2,1002,2002

Foot bath

4, 1004, 2004

Housing, especially double-shell housing

6, 1006

Shell, especially first shell

1008, 2008

Footwell, especially foot bathing room

10, 1010, 2010

Tub, in particular first tub, such as an inner tub

2012

Interior of the first tub, in particular the tub body

14, 1014, 2014

second tub, in particular LED carrier, such as an outer tub

1016

Extension of the tub

1016l

Tub depth

18, 1018

Floor space

1020

first groove-like depression

1022

second groove-like depression

24

Receiving channel

1026

Direction of extension

28, 1028

Inner wall

1030

first area of the tub, in particular the toe-receiving area

1032

second area of the tub, in particular the heel receiving area

1034.2034

Tub bottom

1036, 2036

Tub floor area

1038

Tub outer surface

40

first recess, in particular first footplate

42

second recess, in particular second footplate

44

Footbed

1050

first side wall

1052

second side wall

1054

Inner wall of the tub, in particular the inside of the tub

1060

Pair of feet receiving area

1062

Heel adjustment area or heel receiving area

1064

Toe positioning area

1066

Space between the toes

80, 2080, 2080l

transparent material

2082, 2082 '

Light diffuser

100, 2100

first tub light exit surface

102, 2102

second tub light exit surface

104, 2104

third tub light exit surface

2106

Toe exposure area

2110

first light entry surface

2112

second light entry surface

2114

third light entry surface

2150

Covering layer towards the footwell, especially light absorption surface

2152

Reflector layer, in particular a light reflection surface

2154

opaque surface of the first tub

2156

Reflector layer

2160, 2160l

Light guide body

2170

Bridge area, especially tub carrying handle

1172

cover

1172l, 2172l

inner cover

1174

Cover inner wall

2176

Bath inlet opening

2180, 2180, 2180l,

light

2182, 2182l,

Main beam direction

2182ll

188

Array spacing

190

first LED array

192

second LED array

194, 1194, 2194

Toe LED array

196, 1196, 2196

Foot surface LED array

198, 1198, 2198

Arch of the foot LED array

1202

Angle of attack

210, 210l, 1210,

first LED strip, like a first LED strip

2210, 2210l

212, 212l, 1212,

second LED strip, like a second LED strip

2212, 2212l

214, 214l, 1214,

third LED strip, like a third LED strip

2214, 2214l

220

Blue light LED arrangement

222

first blue light LED

224

second blue light LED

236

UV-C LED

2260, 2260l,

Main direction of radiation

2260ll

270, 1270, 2270

Control unit

280, 1280, 2280

Supply cables, in particular mains power cables

α

Interior angles, especially angles of attack further interesting details:

68

Bulge for splaying the toes

70

needle

72

Nub

74

mushroom

76

rod

84

Lens microstructure

86

Surface refractive index

90

Light reflection surface

92

Internal reflection

94

Guidance of light

116

optical filter, such as a birefringent filter or a polaroid filter

118

Entrance lens

130

Microlens array, such as an outcoupling lens array

132

Lens, especially microlens

134

Width of the lens

136

Diameter of the lens

138

Pitch of the lens array, in particular lens spacing

140

lateral direction

142

offset positioning, especially lateral distance

200

Sidewall LED array

230

Violet light LED, like a UV LED

232

UV-A LED

234

UV-B-LED

238

Multicolor LED

250

Laser LED, especially LED laser, like a coherent blue light source

272

Device of the control unit for comparing a weight sensor signal with a load threshold

282

electrical operating current

284

electrical operating current adapted to individual LEDs

300

Foot bath fluid

302

first fluid inlet nozzle

304

second fluid inlet nozzle

310

Fluid inlet nozzle feed line

320

pump

322

Storage tank

324

Flow system

330

Liquid volume

334

sterilizing light curtain

340

Care product dosing device

350

Stimulus generator

360

Massage body

370

Pair of electrodes

380

Electromagnet

390

first weight sensor

392

second weight sensor

400

left foot of a pair of feet

402

right foot of a pair of feet

404

Part of the foot, especially the heel

406

Foot area, especially instep

408

Part of the foot, in particular the sole of the foot

410

Part of the foot, especially the toe, such as Halux

420

Part of the foot, especially the tip of the toe

430

Foot area, especially distal nail furrow

432

Foot area, especially onychodermal tape

440

Foot area, especially nail plate

460

Foot area, especially toe joint

QUOTES INCLUDED IN THE DESCRIPTION

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

Patent literature cited

• US 6568000 B1 [0006, 0008]
• US 2010/0324611 A1 [0010]
• DE 202017102521 U1 [0011]
• CN 210228659 U [0017]
• KR 101720894 B1 [0019]
• KR 102017987 B1 [0020]
• KR 101656407 B1 [0021]
• KR 20200043554 A [0022]
• EP 3060189 B1 [0023]
• US 8353882 B1 [0024]
• KR 101777166 B1 [0025]
• WO 2020/050536 A1 [0026]
• US 2016/0271414 A1 [0027]
• EP 1818038 A1 [0028]
• EP 1752126 A1 [0029]
• EP 3002508 A1 [0031]
• EP 3208572 B1 [0031]
• WO 2016/142065 A1 [0031]

Non-patent literature cited

• Applicant: Waverx, Inc .; Publication date: December 23, 2010 [0010]
• Owner: Beurer GmbH; Date of entry: May 29, 2017 [0011]
• Owner: Kim Sang Woo et al .; Publication date: March 30, 2017 [0019]
• Owner: Oh Jae Hyun; Publication date: September 03, 2019 [0020]
• Owner: Univ Industry Foundation Yonsei Univ Wonju Campus; Publication date: September 12, 2016 [0021]
• Owner: BSN medical GmbH; Publication date: May 9th, 2018 [0023]
• Applicant: Body Detox AG; Publication date: February 14, 2007 [0029]

Claims (17)

Foot bath for irradiating parts of the foot with a light with a selected wavelength, preferably with a monochromatic light such as blue light, the foot bath having a first tub and at least one light source, such as an LED array composed of several LED strips or several electrically connected LEDs -Arrays, e.g. B. from blue light emitting LEDs such as OLEDs, LED lasers or laser LEDs, wherein the first tub is at least partially made of a translucent material such as polymethyl methacrylate, which has at least one tub light exit surface for light from the light source, and the first Tub encloses a footwell for receiving a pair of feet, characterized in that the first tub has at least two, preferably at least three, tub light exit surfaces at an angle to one another and at least one light entry surface, and the first tub and a second tub are parts of a double-shell housing, with between the first tub as an inner tub and the second tub as an outer tub, the light source is embedded, which is designed to introduce a light into the light entry surface. Foot bath after Claim 1 , characterized in that the first tub is part of a waterproof, in particular first, shell into which a foot bath fluid, such as soapy water or such a, z. B. aqueous, dilution with an essential oil, can be filled. Foot bath according to one of the preceding claims, characterized in that the first tub, at least in some areas, such as in a heel area or in a toe area, is designed as a light guide body, in particular the light entry surface of the first tub is designed for coupling light from the light source and the first tub is designed for internal reflection, such as total reflection in the first tub, for guiding light to the tub light exit surface, the light entry surface and the tub light exit surface preferably being positioned offset from one another with respect to an extension of the tub. Foot bath according to one of the preceding claims, characterized in that the light entry surface is equipped with a double-computing filter, a birefringent polarization filter, a polaroid filter and / or an input lens, in particular is covered by the polarization filter or a polaroid filter, preferably for a wavelength range between 400 nm and 460 nm. Foot bath according to one of the preceding claims, characterized in that a microlens array is present on one side of the first tub facing the footwell, through which light can be coupled out of the first tub, a lens of the microlens array preferably having a width or a diameter between 5 µm and 2000 µm, advantageously has a width or diameter between 10 µm and 50 µm with a pitch of less than 350 µm. Foot bath after Claim 5 , characterized in that the microlens array is made up of printed microlenses, produced e.g. B. by an ink jet printing process, e.g. B. by a pad printing process or z. B. by a screen printing process, or by a precision blank pressing process produced microlenses, in particular each equally spaced microlenses in the lateral direction, composed. Foot bath according to one of the preceding claims, characterized in that the second tub has at least one groove-like recess which represents a receiving channel for at least one LED strip, the groove-like recess preferably extending in a direction through the two light entry surfaces of the first tub in alignment are arranged in front of the recess. Foot bath according to one of the preceding claims, characterized in that there is a control unit at the front of the foot bath, which is connected to each individual LED of the light source to control a brightness and / or a color, whereby the control unit is a control unit for electrical operating currents adapted to individual LEDs is. Foot bath according to one of the preceding claims, characterized in that the first tub has a multilayer structure and / or is printed in areas with a covering layer towards the footwell. Foot bath according to one of the preceding claims, characterized in that the light source has at least one blue light LED and at least one UV LED, such as a UV-A LED, which can preferably be switched independently of one another in order to set an emission of light. Foot bath according to one of the preceding claims, characterized in that the second tub is made of a high-temperature plastic, such as a perfluoroalkoxy polymer (PFA), such as polyvinylidene fluoride (PVDF), such as a polyetherketone (PEK), such as a polyaryletherketone (PAEK), such as a polyetheretherketone (PEEK), such as a polytetrafluoroethylene (PTFE), such as a polyimide (PI), such as a polyamideimide (PAI), such as a polyetherimide (PEI), such as a polysulfone (PSU), such as a polyethersulfone (PESU) or such as a polyphenylsulfone ( PPSU), which carries a reflector layer on an inside, at least in some areas. Foot bath according to one of the preceding claims, characterized in that there is at least one second light entry surface on the first tub, which is connected to at least one of the tub light exit surfaces in terms of light conduction. Foot bath according to one of the preceding claims, characterized in that the first tub has a light-reflecting surface at least in some areas. Foot bath according to one of the preceding claims, characterized in that at least one of the tub light exit areas serves as a toe exposure area, a first light source serving as an irradiation light source for a distal toenail furrow and light from the light source exiting through at least that tub light exit area. Foot bath according to one of the preceding Claims 8 until 14th , characterized in that at least one weight sensor is installed in a tub bottom, preferably two weight sensors are installed, which is in electrical connection with the control unit, wherein the control unit comprises a device which, in response to a signal from a weight sensor, such as exceeding a load threshold or a pressure threshold that puts a light source into an active state. Foot bath according to one of the preceding claims, characterized in that there is at least one fluid inlet nozzle, preferably at least one fluid inlet nozzle for each foot, on an inner wall of the tub or on an inner wall of the cover, through which a pressurized and preferably temperature-controlled fluid, such as soapy water, into a pair of feet receiving area, can preferably be introduced through a sterilizing light curtain, such as a UV-C light curtain, or circulated by means of a pump, with a care agent dosing device actuated by the control unit being connected in particular to a fluid inlet nozzle feed line. Method for treating two feet in a foot bath, preferably a foot bath according to one of the preceding claims, characterized in that light with a blue wavelength switched on by a control unit inside a first tub is guided onto at least two tub light exit surfaces which are part of the first tub and differ from opaque surfaces of the first tub by microlens structures.

Images