EP3486382A1 - Actuation device for a sanitary device - Google Patents

Abstract

An actuating device (1) for a sanitary fitting for the purpose of triggering a function, wherein the actuating device (1) has a housing (2) with a front side (13) and a rear side (14) and a detection sensor (3) with a transmitter (4) and a receiver (5) for detecting a user, wherein the detection sensor (3) emits waves via the transmitter (4) and receives via the receiver (5). The detection sensor (3) is arranged in a cavity (6) of the housing (2), wherein the cavity (6) in the direction of said waves has a transmission region (7a) transparent to said waves; and wherein the housing (2) is formed such that it can be mounted with a gap (7b) to a mounting plane (ME) specified by the customer, which gap (7b) lies in relation to the said transmission region (7a) such that the transmitted as well as the to be received waves through the gap (7b) are guided.

Description

TECHNICAL AREA

The present invention relates to an actuator with user recognition according to the preamble of claim 1.

STATE OF THE ART

Actuator plates for user recognition have become known from the prior art. For example, the EP 3 031 989 such actuator plate, wherein sensors are arranged in a housing.

The EP 2 497 868 discloses another device for electrically triggering a water delivery, wherein the sensors monitor the space in front of the device over certain surface areas in the front.

The practical use of such actuation plates has also shown that the function can be far more dependent on the installation situation. In addition, malfunctions often occur because persons are detected who only pass the device and are not interested in triggering.

PRESENTATION OF THE INVENTION

Based on this prior art, the present invention seeks to provide an actuator with user identification for the purpose of triggering a function that overcomes the disadvantages of the prior art. A particularly preferred object is to provide an actuating device which allows a more reliable user identification.

This object is achieved by the subject matter of claim 1. Accordingly, an actuating device for a sanitary fitting is used for the purpose of triggering a function. The function may be, for example, triggering a flush or turning on a light, or starting a shower, or opening a water valve in an outlet fitting, or any other function. Said actuating device comprises a housing with a front side and a rear side and a detection sensor with a transmitter and a receiver for detecting a user. The detection sensor emits electromagnetic waves via the transmitter and receives via the receiver the electromagnetic waves reflected by the user. The detection sensor is arranged in a cavity of the housing, wherein the cavity in the direction of said electromagnetic waves has a transmission range which is transparent or permeable to the said electromagnetic waves. This means that the electromagnetic waves exit and exit the cavity via the transmission area. The housing has a side surface which extends in the direction of the surface normal to the front side at least partially between the front side and the rear side, wherein the transmission region is arranged in the region of the side surface or in the side surface.

In other words, the transmission range is substantially such that the electromagnetic waves leak over the side surfaces of the housing.

This has the advantage that the area to be detected is not an area in front of the front side, but another area, namely an area laterally, in particular below the actuator, whereby incorrect operations can be avoided.

The electromagnetic waves preferably pass through in the direction of a main direction through the transmission area. The expression "main direction" in the present case is understood to mean a direction in which the electromagnetic waves travel shortly after being transmitted by the transmitter antenna and in which the electromagnetic waves pass through the transmission region. After passing through the transmission area, the electromagnetic waves propagate based on the local conditions and the antenna characteristic. As explained below, the electromagnetic waves can move in a circularly polarizing manner, wherein the Main axis then essentially understood as an axis around which the electromagnetic waves rotate around.

With regard to a surface normal directed at right angles to the front surface, the main direction of the electromagnetic waves is substantially perpendicular to the surface normal.

By the term "actuator" is particularly understood an actuator plate for triggering a flush on a toilet or urinal, or a plate of an outlet fitting or a housing for a shower toilet or other sanitary device.

Typically, seen in the installed position, the side surface is oriented with the transmission range substantially in the vertical or the horizontal. Preferably, the electromagnetic waves are substantially downward or upward with respect to the housing.

The transmission region can be formed as a breakthrough in the housing or it can be made of a transparent or permeable to the electromagnetic waves material. It is also conceivable that the transmission region is partially formed as an opening in the cavity or in the housing and is partially made of a transparent material for the electromagnetic waves.

By the term "transparent" or "permeable" in connection with the transmission range is meant that the emitted and the receiving electromagnetic waves of the detection sensor can pass through the transmission range. The transmission range does not hinder these electromagnetic waves in their propagation.

The housing is preferably designed in such a way that it can be mounted with a gap to a mounting plane specified by the customer, which gap is situated in relation to the said through-beam region such that the electromagnetic waves are guided through the gap. It will be the transmitted and the received electromagnetic waves passed through both the transmission area and through the gap. The arrangement has the advantage that the users can be detected due to the arrangement of the transmission area and the gap, regardless of the installation situation, because the electromagnetic waves are not by elements that are in contact with the mounting plane or protruding therefrom, or by the actuator yourself, but can be reliably sent and received. That is, when installed, no elements of the mounting plane can obstruct the electromagnetic waves. In particular, the materialization of the mounting plane and the element installed behind the mounting plane can be arbitrary.

The term "gap" is understood to mean an opening or a breakthrough or a gap. Typically, the gap is open, that is formed without material filling. But it can also be provided with a material transparent to the electromagnetic waves material filling.

Preferably, the detection sensor is a high-frequency sensor whose frequency is in the range of 24 GHz to 24.25 GHz or 61 GHz or 76 GHz. Other sensors, such as optical or capacitive sensors can also be used.

A particularly preferred embodiment is characterized in that the transmitter has a transmitter antenna in the form of a patch antenna and / or that the receiver has a receiver antenna in the form of a patch antenna.

A "patch antenna" is understood to mean an antenna which extends essentially in one plane. Preferably, the extension of the patch antenna is formed transversely to the main direction of the electromagnetic waves substantially as a rectangle, in particular as a slender rectangle.

The term "main direction" in the context of the patch antenna means a direction in which the electromagnetic waves travel shortly after being transmitted from the transmitter antenna. This is typically within the cavity. Outside the cavity and after passing through the transmission range or, where appropriate, the gap, the electromagnetic waves propagate based on the local conditions and the antenna characteristic continues.

In this case, the transmission area preferably has an area which corresponds at least to the size of the patch antennas or which is smaller than the size of the patch antennas. The same can be said for the clear width of the gap.

Preferably, the patch antenna is circularly polarized such that the electromagnetic waves and the electromagnetic field are circularly polarized, so that the electromagnetic waves radiate circularly. The circularly polarized field has the advantage that the electromagnetic waves can also penetrate a transmission range or a gap which corresponds to half the wavelength or which is smaller than half the wavelength.

Preferably, said patch antennas of the transmitter and those of the receiver are substantially in a common plane.

Preferably, the cavity is not penetrated except in the transmission range for the said electromagnetic waves. This means that the said electromagnetic waves can only escape via the said transmission area.

According to a first variant, the cavity is provided, except in the transmission region, by a coating which is impermeable to said electromagnetic waves, wherein the coating is preferably an electrically conductive, in particular a metallic, coating. The coating ensures that the electromagnetic waves can leave the cavity exclusively via the transmission area.

According to a second variant, the wall of the cavity is formed, except in the transmission region, by a material which is impermeable to said electromagnetic waves.

Preferably, the transmission area and the gap are in the main direction of said seen electromagnetic waves, arranged substantially congruent to each other. This means that the shape and the extent of the gap and the transmission range are substantially equal to each other. In addition, the gap and the transmission area are substantially one above the other when viewed in the main direction. However, it is also conceivable that either the gap or the transmission range is greater than the transmission range or the gap.

That is, the main direction extends in the region of the transmission area and the gap substantially parallel to the mounting plane, wherein the electromagnetic waves emerge from the gap essentially in the main direction and then propagate correspondingly further in space.

Preferably, the transmission region and / or the gap are substantially rectangular and each have a length which corresponds to a multiple of the wavelength of the electromagnetic waves transmitted by the detection sensor.

Preferably, in a first embodiment, the transmission region and / or the gap has a width which corresponds to the wavelength of the electromagnetic waves transmitted by the detection sensor.

In a second embodiment, the transmission range and / or the gap has a width which corresponds to half the wavelength of the electromagnetic waves transmitted by the detection sensor. As a result, the space required in the actuator can be optimized accordingly. This embodiment is particularly advantageous when the above patch antenna, in particular with the circular polarization, is used.

In a third embodiment, the transmission area and / or the gap has a width which corresponds to a dimension smaller than half the wavelength of the electromagnetic waves transmitted by the detection sensor. As a result, the space required in the actuator can be further optimized. This embodiment is particularly advantageous when the above patch antenna, in particular with the circular polarization, is used.

• die besagte Kavität ist mit dem Durchstrahlbereich am Frontelement angeordnet;
• die besagte Kavität ist mit dem Durchstrahlbereich am Rückelement angeordnet;
• die besagte Kavität ist mit dem Durchstrahlbereich am Frontelement und am Rückelement angeordnet.

The housing preferably has a front element having the front side and a rear element having the rear side, which can be connected to one another. In particular, the front element and the rear element can be connected to one another via a latching connection or another mechanical connection. There are different variants with regard to the arrangement of the cavity conceivable:

• the said cavity is arranged with the transmission area on the front element;
• the said cavity is arranged with the transmission area on the rear element;
• the said cavity is arranged with the transmission area on the front element and on the rear element.

The front element preferably has actuating buttons for triggering a flush. In this embodiment, the flushing can be triggered manually, while with the detection sensor, another function, such as turning on a night light or the triggering of a shower toilet can be controlled.

In an alternative embodiment, the actuating device is part of an outlet fitting, which further comprises an outlet pipe.

Preferably, the transmission range is made of plastic, in particular of a thermoplastic, preferably with a relative permittivity or a dielectric conductivity of ε _r between 3 and 5. This permittivity is particularly advantageous if the Durchstahlbereich or the gap has a width which is half Corresponding to wavelength or which is smaller than half the wavelength, and when the above-mentioned patch antenna, in particular the circularly polarized patch antenna, is used.

Particularly preferably, the housing is viewed in the direction of the surface normal to the front side a rectangle or a square, extending from the front in the direction of the surface normal of the edge of the rectangle or the square, a side surface, wherein the transmission range or the gap in the region Side surface is arranged. This means that the main direction of the electromagnetic waves is essentially perpendicular to the surface normal. Especially in this arrangement, the width described above is advantageous because then the extension of the side surface smaller can be chosen.

Preferably, the extent of the side surface in the direction of the surface normal is many times smaller than the extent of the front side transverse to the surface normal.

Preferably, the actuating device further comprises at least one light source whose light can be emitted via the said transmission region or the gap or via a passage arranged separately from the transmission region.

The light source can be controlled by the signal provided by the detection sensor.

Particularly preferably, the light source is arranged on the same circuit board as the detection sensor.

An arrangement comprises an actuator as described above and a sanitary article, wherein both the actuator and the sanitary article are attached to said mounting plane, and wherein the transmission area or the possibly existing gap is directed against the sanitary article. The sanitary article is preferably a washstand, a toilet bowl or a urinal.

Further embodiments are given in the dependent claims.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1

eine perspektivische Explosionsdarstellung einer Betätigungsvorrichtung nach einer Ausführungsform der vorliegenden Erfindung;

Fig. 2

eine perspektivische Ansicht der Betätigungsvorrichtung nach Figur 1;

Fig. 3

eine Schnittdarstellung entlang der Schnittlinie III-III der Figur 2; und

Fig. 4

eine Detailansicht des Details Z nach der Figur 3;

Fig. 5

eine schematische Ansicht der Ausbreitung der elektromagnetische Wellen eines Erfassungssensors der Betätigungsvorrichtung nach der Figur 1; und

Fig. 6

eine perspektivische Ansicht einer Betätigungsvorrichtung nach einer weiteren Ausführungsform.

Preferred embodiments of the invention will be described below with reference to the drawings, which are given by way of illustration only and are not to be interpreted as limiting. In the drawings show:

Fig. 1

an exploded perspective view of an actuator according to an embodiment of the present invention;

Fig. 2

a perspective view of the actuator according to FIG. 1 ;

Fig. 3

a sectional view taken along section line III-III of FIG. 2 ; and

Fig. 4

a detailed view of the detail Z after the FIG. 3 ;

Fig. 5

a schematic view of the propagation of the electromagnetic waves of a detection sensor of the actuator according to the FIG. 1 ; and

Fig. 6

a perspective view of an actuator according to another embodiment.

DESCRIPTION OF PREFERRED EMBODIMENTS

In the figures, an actuating device 1 for a sanitary fitting is shown. The actuating device 1 serves for the purpose of triggering the triggering of a function in connection with a sanitary fitting. The function may, for example, be the initiation of flushing and / or the control of a sub-shower and / or the control of lighting and / or the actuation of a water valve in an outlet fitting and / or another sanitary function. The sanitary fitting is preferably a toilet or urinal or a vanity or other element.

In the FIGS. 1 to 5 is the actuator as the actuator plate and in the FIG. 6 shown as outlet fitting. The same parts are provided with the same reference numerals.

The actuating device 1 comprises a housing 2 with a front side 13 and a rear side 14. The front side 13 can be recognized by the user when installed. About the back 14, the actuator is in the installed state with a wall or a mounting frame or a part of the sanitary fitting in combination. Furthermore, the actuating device 1 comprises a detection sensor 3 with a transmitter 4 and a receiver 5. The detection sensor 3 is used to detect a user who uses the sanitary fitting. About the transmitter 4, the detection sensor 3 emits waves, which are then reflected at a user and received by the receiver 5 again. The detection sensor 3 may then detect a user based on the transmitted or received waves and output a corresponding signal. The signal then serves as a control signal for the triggering of said function.

The detection sensor 3 is mounted in a cavity 6 of the housing 2. Under a cavity 6 is understood in the present case, a receiving space which is arranged in or on the housing 2 and is provided by the housing 2. The cavity 6 has a transmission area 7a in the direction of said waves. The transmission area 7a is transparent to said waves. That is, the said waves can escape from the cavity 6 through the transmission area 7a. The transmission region 7a may be formed as an opening or it may be formed of a material which is transparent to the waves emitted by the detection sensor 3. This means that the waves can penetrate through the material to the outside.

In the embodiment shown, the cavity 6 is closed with a lid 21.

The housing 2 is in the preferred embodiment shown, as in FIGS Figures 2 and 4 shown, designed such that it can be mounted with a gap 7b to a mounting plane ME specified by the customer. The mounting plane ME is, for example, a tile-covered wall or the front side of a mounting frame or the surface of the sanitary fitting. The mounting plane ME is thereby represents the final state, that is, no elements are arranged, which are placed on the mounting plane ME. In this case, the gap 7b lies in the direction of the said transmission region 7a in such a way that the transmitted waves, as well as the waves to be received, are guided by the transmission region 7a through the gap 7b.

Of the FIG. 4 It will be apparent that from the detection sensor 3, the waves are emitted along a principal direction H and first pass through the transmission region 7a and then pass through the gap 7b. The arrangement of transmission area 7a and gap 7b has the advantage that the actuating device 1 can be used independently of the materialization of the on-site predetermined assembly level ME. In the field of application, it has been shown that the materialization of the mounting plane ME can be very versatile and under certain circumstances adversely affect the waves of the detection sensor or make it impossible to penetrate. In this respect, an actuator 1 is created due to the arrangement of the transmission area 7a and the gap 7b, which can be used in all applications.

The detection sensor 3 is preferably a high frequency sensor whose frequency preferably at 24 gigahertz.

The transmitter 4 has a transmitter antenna 8 and the receiver 5 has a receiver antenna 9. The waves are transmitted via the antennas. Both the transmitter antenna 8 and the receiver antenna 9 are formed substantially in the shape of a patch antenna. In this context, a patch antenna is understood to mean an antenna which preferably lies in a plane. In the embodiment shown, the transmitter antenna 8 and the receiver antenna 9 are located on a common printed circuit board, which in the FIG. 1 is shown. From this printed circuit board extends the main direction H, in which the waves transmitter 4 are emitted, substantially orthogonal to the plane in which the patch antennas lie.

The transmission area 7a has a surface which corresponds at least to the size of the transmitter antenna 8 and the receiver antenna 9 or the patch antenna. Likewise, the gap 7b has a clear width, which corresponds at least to the size of the transmitter antenna 8 and the receiver antenna 9 or patch antennas. This ensures that all waves that are emitted by the transmitter 4 and received by the receiver 5, unhindered escape from the cavity and the housing 2 and in turn can enter unhindered.

In connection with the wave propagation of the transmitter 4 is also on the FIG. 5 referring to which, the wave propagation is explained in more detail. The FIG. 5 schematically shows a part of the patch antenna, as well as the transmission area 7a and the gap 7b. In principle, the waves W propagate in the direction of the main direction H. This means that the electric field extends in the direction of the main direction H. The patch antenna polarizes the electric field in such a way that a circular polarization of the field is achieved. The circularly polarized field rotates with time around the axis of the main direction H. A kind of spiral is created, which rotates around the main axis H.

Typically, the antenna is chosen such that the electric field or waves extend in the direction parallel to the feed. Preferably, according to the preferred embodiment, the antennas are fed left and right. For half the time, the electric field is now aligned so that it is parallel or approximate is parallel to the gap, but during the other half of the time the electric field is perpendicular to the gap or approximately perpendicular. In this case, the waves can pass through the gap and radiate forward. In this case, the waves W will leave the gap.

Preferably, the cavity 6, except in the transmission area 7a, on a non-penetrable for said waves coating. In this case, substantially the entire interior of the cavity 6, except for the transmission area 7a, provided with the coating. If the lid 21 is present, the lid 21 is also provided on the cavity 6 side facing with a metallic coating. The coated insides bear the reference numeral 22. The lid may also be a metallic lid. Typically, the coating is a metallic coating. The coating provides the advantage that the waves emerge from the cavity 6 exclusively via the said transmission region 7a and thus focussing can be achieved. In addition, errors can be practically ruled out.

As from the detail view of the FIG. 4 2, the transmission region 7a and the gap 7b are essentially congruent when viewed in the main direction H of said waves. This means that the transmission area 7a and the gap 7b are superimposed in the main direction H such that a "clear width" is created for the waves through the transmission area 7a and the gap 7b, through which "clear widths" the said waves exit, or can enter. In this context, "clear width" means a clear width, which is transparent to the waves. Not necessarily this must be a "clearance" where no material is in the transmission area. However, as explained above in connection with the transmission range, the material must be permeable or transparent to the waves.

The transmission area 7a and the gap 7b have a substantially rectangular basic shape. The rectangular basic shape has a length which corresponds to a multiple of the wavelength of the waves transmitted by the detection sensor 3. The length L is in the FIG. 1 located.

The transmission area 7a and the gap 7b both have a width B, which at most corresponds to the wavelength of the waves transmitted by the detection sensor 3. It has proved particularly advantageous if the transmission region 7a and the gap 7b have a width which corresponds to half the wavelength of the waves transmitted by the detection sensor 3. As a result of this design, the gap 7b as well as the transmission area 7a can be selected as small as possible, which is advantageous for the total thickness of the actuating device 1, since it can be correspondingly minimized. The width B is in the FIG. 4 located. Typically, the width B is about 4 millimeters, but as mentioned, depending on the wavelength. The propagation of the waves described above makes it possible to create a comparatively thin gap 7b or a comparatively thin transmission area 7a.

With respect to the shape of the housing 2 can from the FIG. 1 be well recognized that viewed in the direction of the surface normal F on the front side 13, the housing 2 has the shape of a rectangle. The housing 2 may also have the shape of a square or another shape. From the front side 13 extends in the direction of the surface normal F a side surface 15, which is provided here essentially by the front element 10. The transmission area 7a or the gap 7b are arranged in the region of the side surface 15. That is, the main direction H, the waves from the detection sensor 3 is perpendicular to the surface normal F and substantially parallel to the mounting plane ME. Typically, in the installed position, the housing is then arranged so that the main direction H is oriented downwards in the direction of gravity, so that a user setting himself to a toilet or approaching a urinal can be recognized. In this context, it should be mentioned that the waves after exiting the gap 7b not only in the main direction H but as in the FIG. 3 also indicated moving away from the mounting plane ME ..

The extension B of the side face 15 is a multiple smaller in the direction of the surface normal F than the extension of the front face 13 transversely to the surface normal F.

As can be well recognized by the figures, the housing 2 has a front element 10 having the front side 13 and a rear element 11 having the rear side 14. The two elements 10, 11 are connected to one another via a latching connection 18. In the embodiment shown, the said cavity 6 lies with the transmission region 7a on the rear element 11. An arrangement on the front element 10 or a joint provision of the cavity 6 between the front element 10 and the rear element 11 would also be conceivable. The gap 7b is created by the spaced arrangement of the front element 10 to the mounting plane ME.

Next, the front element 10 has at least one, here two, actuating button 12 for triggering a flushing. In the embodiment shown, actuating device 1 also has a light source 16, the light of which can be emitted via said through-beam region 7a or the gap 7b. That is, in the embodiment shown, the light source 16 is controlled by the signal of the detection sensor 3, while the flushing are triggered manually via the operation buttons 12. The actuating device 1 shown here thus essentially serves as an actuating device 1, with which, for example, a night light can be provided. In other embodiments, it is conceivable to dispense with the operation buttons 12 and to use the signal of the detection sensor for the initiation of the flushing. In yet another embodiment, it would be conceivable to also arrange the operation keys and to use the signal of the detection sensor for starting or triggering a sub-shower.

The light source 16 is preferably disposed on the same conductive plate as the detection sensor 3. In the illustrated embodiment, the light source 16 is located to the left of the detection sensor 3 and the patch antennas of the detection sensor 3, respectively. In this case, the light of the light source 16 is coupled into an optical waveguide and decoupled again in the region of the slit 7B. The light guide bears the reference numeral 19.

Of the FIG. 4 can be well recognized with respect to the gap 7 that this is provided by the fact that the front element 10 is present on the rear element 11 and this does not overlap. It is created between a rear edge 20 of the front element 10 and the mounting plane ME of the corresponding gap 7a.

Next can of the FIG. 4 Well recognized that parts of the back element 11 extend through an opening 23 of the mounting plane ME through. In this sectional view it is also shown that the mounting plane ME is the front side of a wall structure 24.

In the FIG. 6 is, as mentioned, the actuator 1 shown in connection with an outlet fitting. Identical parts are provided with the same reference numerals. Here extends from the front side 13, a faucet 25, which is arranged instead of the operation buttons according to the embodiment in the other figures. The installation of the corresponding sensor parts is symbolized by the dashed lines.

LIST OF REFERENCE NUMBERS

1 actuator 19 optical fiber 2 casing 20 rear edge 3 detecting sensor 21 cover 4 transmitter 22 coated inside 5 receiver 23 opening 6 cavity 24 wall structure 7a Through beam area 25 water tap 7b gap H main direction 8th transmitting antenna D expansion 9 receiver antenna ME mounting level 10 front element e level 11 return element F surface normal 12 operating keys B width 13 front L length 14 back W waves 15 side surface 16 light source 17 passage 18 locking connection

Claims (15)

Actuating device (1) for a sanitary fitting for the purpose of triggering a function, wherein the actuating device (1) comprises a housing (2) with a front side (13) and a rear side (14) and a detection sensor (3) with a transmitter (4) and a receiver (5) for detecting a user,
wherein the detection sensor (3) emits waves via the transmitter (4) and receives waves via the receiver (5),
the detection sensor (3) being disposed in a cavity (6) of the housing (2), the cavity (6) having, in the direction of said electromagnetic waves, a transmission area (7a) transparent to said waves, and
wherein the housing (2) has a side surface (15) which extends at least partially between the front side (13) and the rear side (14) in the direction of the surface normal (F) of the front side, wherein the transmission region (7a) in the region of the side surface (15 ) or in the side surface is arranged. Actuating device (1) according to claim 1, characterized in that the housing (2) is designed such that it can be mounted with a gap (7b) to an on-site predetermined mounting plane (ME), which gap (7b) in such a way to said transmission area ( 7a) is that the transmitted as well as the waves to be received through the gap (7b) are guided. Actuating device (1) according to claim 1 or 2, characterized in that the detection sensor (3) is a high-frequency sensor whose frequency is preferably in the range of 24 GHz to 24.25 GHz or at 61 GHz or at 76 GHz. Actuating device (1) according to one of the preceding claims, characterized in that the transmitter (4) has a transmitter antenna (8) in the form of a patch antenna and / or that the receiver (5) has a receiver antenna (9) in the form of a patch antenna , Actuating device (1) according to claim 4, characterized in that
that the transmission region (7a) has an area which corresponds at least to the size of the patch antennas, or which is smaller than the size of the patch antennas; and or
that the gap (7b) has a clear width which corresponds at least to the size of the patch antennas or which is smaller than the size of the patch antennas; and or
that said patch antennas lie substantially in a common plane (E); and or
that the patch antenna is circularly polarized. Actuating device (1) according to one of the preceding claims, characterized in that the cavity (6), except in the transmission region (7a), is non-penetrable for the said electromagnetic waves,
wherein the cavity (6) is provided, except in the transmission area (7a), by a coating which is not penetrable for the said waves, wherein the coating is preferably designed to be electrically conductive; or
wherein the wall of the cavity (6) is formed, except in the transmission area (7a), by a material which is impermeable to said waves. Actuating device (1) according to any one of the preceding claims, characterized in that the transmission region (7a) and the gap (7b) seen in the main direction (H) of said waves, are substantially congruent. Actuating device (1) according to one of the preceding claims, characterized in that the transmission region (7a) and / or the gap (7b) is substantially rectangular and preferably have a length (L) which is a multiple of the wavelength of the detection sensor (3 ) corresponds to transmitted electromagnetic waves. Actuating device (1) according to one of the preceding claims, characterized in that the transmission region (7a) and / or the gap (7b) has a width (B) which corresponds to the wavelength of the electromagnetic waves sent from the detection sensor (3); or that the transmission region (7a) and / or the gap (7b) has a width which corresponds to half the wavelength of the electromagnetic waves transmitted by the detection sensor (3); or that the transmission region (7a) and / or the gap (7b) has a width which corresponds to a dimension smaller than half the wavelength of the electromagnetic waves transmitted by the detection sensor (3). Actuating device (1) according to one of the preceding claims, characterized in that
that the housing (2) has a front side (13) exhibiting a front element (10) and the back (14) exhibiting return element (11) which are connected to each other, wherein said cavity (6) with the through-beam region (7a) on Front element (10) is arranged;
or that said cavity (6) is arranged on the back element (11) with the transmission region (7a);
or that the said cavity (6) with the transmission area (7a) is arranged on the front element (10) and on the rear element (11). Actuating device (1) according to claim 10, characterized in that the front element (10) actuating buttons (12) for triggering a flushing. Actuating device (1) according to one of the preceding claims 1 to 9, characterized in that the actuating device is part of an outlet fitting, which further comprises an outlet pipe. Actuating device (1) according to one of the preceding claims, characterized in that the transmission region (7a) consists of plastic, in particular of a thermoplastic, preferably with a relative permittivity of ε _r , between 3 and 5, and / or that the expansion ( D) of the side surface (15) in the direction of the surface normal (F) is a multiple smaller than the extension of the front side (13) transversely to the surface normal. Actuating device (1) according to one of the preceding claims, characterized in that the actuating device (1) further comprises at least one light source (16) whose light over said transmission area (7a) or the gap (7b) or via a separate from the transmission area (7a) arranged passage (17) can be issued. Arrangement comprising an actuating device according to one of the preceding claims and a sanitary article, wherein both the actuating device and the sanitary article are attached to said mounting plane, and wherein the transmission region (7a) and / or gap (7b) is directed against the sanitary article.

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