EP3992382B1 - Use of a shower device designed to be mounted on a bowl - Google Patents

Description

The present invention relates to a shower device that can be mounted on a bowl, in particular a toilet bowl.

In particular, a mobile shower device is intended, which is only temporarily mounted on the bowl in order to implement an abdominal shower function for a user sitting above the bowl or on the bowl during assembly. For this purpose, the shower device has a fastening area with a fastening device. It also contains a shower arm with a shower nozzle therein, the shower arm of course being connected to the fastening device.

Such a shower device is already known from the DE 2 410 717 A1 . Regarding the state of the art, reference is first made to DE 41 32 350 A1 , which is the basis of the preamble of claim 1. In this document, a telescopic shower arm is extended by the water pressure, whereby when the water pressure is applied, a ball valve closes, which later provides ventilation in favor of the return movement of the shower arm when the water pressure drops. Reference is also made to the EP 3 141 668 A1 , the EP 1 988 225 A1 and the WO 2014/170465 A1 .

On this basis, the invention addresses the problem of specifying a shower device that is improved in terms of functional properties.

First, according to the invention, a telescopic mechanism of the shower arm is provided, with which the shower nozzle provided at or near a distal end of the shower arm is extended further away from the fastening device and/or can be moved deeper into the bowl. In this telescopic mechanism, at least two telescopic elements are provided, a first of which essentially accommodates the second in the retracted state. The second telescopic element can be partially moved out of the first telescopic element when extended, thereby increasing the length of the shower arm.

Of course, which is particularly preferred, a total of three telescopic elements can be provided (or even more), with a third telescopic element being accommodated or moved within the second telescopic element in the same way as was just described for the first and second telescopic elements.

Such telescopic mechanisms are known from permanently and permanently installed shower arm devices in shower toilets. In connection with a mobile shower device, there is also the advantage of being able to move the shower nozzle relatively far from the edge of the bowl into the bowl with a relatively compact design and thus achieve a favorable starting point for the shower jet to be directed at certain areas of the body. On the other hand, the shower arm can remain compact and short when retracted and is therefore less prone to contamination. The telescopic members are usually essentially cylindrical telescopic elements.

Furthermore, according to the invention, a shower water guide is provided for dispensing shower water when the shower arm is not extended. Preferably it is a shower water guide in a first (proximal) telescopic element, preferably as a guide, in the wall of which such as a channel-like depression or a closed channel actually formed in the wall of the first telescopic element. In addition, when the telescopic mechanism is retracted, shower water, e.g. B. on a seal between the first and a second contained therein Telescopic element of the telescopic mechanism is guided past. This shower water can then leak through further leaks, for example through a distal annular gap between the two telescopic elements run outside. The shower arm can therefore release water when retracted, which can be used advantageously in various ways.

According to the invention, a gap between the first and second telescopic elements can be rinsed in this form before and/or after the shower arm is or has been extended.

According to the invention, the contents of the water pipe can alternatively or additionally be supplied in this form by a water heater, e.g. B. in the base device, are already ejected up to the shower nozzle before the actual showering process, so that the user does not come into contact with this already cold shower water. This can be done by initially working with a lower water pressure so that the shower arm does not extend yet, and this water pressure is only increased afterwards, i.e. after the cleaning and cold water removal process.

A very similar design option concerns a space between the second telescopic element and a third telescopic element possibly contained therein. In this case, the shower nozzle in particular can be used to access this intermediate space, which can be arranged within the second telescopic element when the telescopic mechanism is in the retracted state. The water can then penetrate into this space via the shower nozzle and e.g. B. can be delivered via a similar annular gap as just described (here between the second and third telescopic elements) or via an additional opening provided in this distal area.

In any case, it is preferred that the shower water supply is deactivated by extending the shower arm, i.e. the shower water is no longer lost to any significant extent through annular gaps or the like when the shower arm is extended. This can happen as a result of a sealing element being placed during or at the end of the extension.

In particular, the second telescopic element (and, if present, preferably also the third) can have a step towards the outside, i.e. in the radial direction, at a proximal end, and a sealing ring resting thereon. When extending, the sealing ring then comes into contact with a counter surface at the distal end of the first telescopic element (or the second, if we are talking about extending the third telescopic element), whereby a seal occurs. The exemplary embodiment illustrates this.

In the exemplary embodiment, when the shower arm is fully extended, the shower water can only exit via the (at least one) shower nozzle. The exemplary embodiment shows that in particular the lateral channel recess on the inside of the first telescopic element is then virtually short-circuited because it no longer offers a path to the outside.

Furthermore, the shower nozzle can preferably have a swirling chamber, which generates rotating water flows during the actual showering process (not necessarily also during the rinsing processes just described) and enables a swirl-like shower jet. For better understanding, reference can be made to the file EP 2 628 546 the same applicant who explains this shower nozzle principle.

In a variant that is particularly suitable for the invention, an electric motor that is common in other shower devices for toilets is dispensed with, but a driven movement of the telescopic mechanism is still used, namely with the help of the water pressure of the shower water. This can be a supply line pressure, possibly initially or always moderated by an intermediate valve, or the pressure of a water pump. The retraction movement can then z. B. via a return spring that counteracts the extension movement, for example a coil spring provided in the shower arm.

Often, when installed on the edge of a bowl, the shower device should protrude slightly downwards from this edge into the bowl opening, for which purpose the shower arm, but also other parts of the shower device, can serve. On the other hand, it is advisable to design the fastening device so that it can be attached to the edge of a bowl, in particular as a flat fastening device for a flat area of the edge of the bowl. The part of the shower device located in the area of installation on the edge of the bowl is referred to here as the fastening area. Between this and the shower arm, the shower device has a bending area, in which in particular a water pipe of the shower device for supplying the shower attachment to the shower arm and the shower nozzle changes direction by more than 20° downwards.

The aim is to design the shower device as flat as possible, especially in the bend area, i.e. the area where the direction of the water pipe changes (with regard to the flow direction of the water), because the shower device is therefore particularly unobtrusive and can be accommodated particularly conveniently under a toilet seat or the like can be. Even without a toilet seat, a flat design doesn't add much bulk. The terms “fastening and buckling area” are to be understood spatially and not necessarily related to connected or separate components.

Accordingly, it is preferably provided that the water pipe in the bend area of the shower device has, on the one hand, a dimensionally stable flow cross section and is therefore not caused by, for example. B. the resting on a bend in the edge of the bowl can already be deformed, on the other hand this flow cross section is designed to be flat, i.e. is designed to be shorter in the vertical direction (relative to the installed position of the shower device) than perpendicular to it in the horizontal direction (and of course perpendicular to the direction of flow). In this sense “flat” are e.g. B. a transversely elliptical flow cross section or a transversely rectangular one or transitions between them (rectangles with rounded corners and the like).

The flatter flow cross-section allows a flat design of the shower device in this kink area, while still having a favorable flow cross-section in order to avoid excessive line resistances. In addition, the dimensional stability prevents the flow cross-sectional area from being flattened too much.

Preferably, the statement for the flat flow cross section also applies to a downstream area, for example up to a transition into the shower arm, where the increasing distance from the edge of the bowl means there is more overall height anyway is possible. The flow cross section naturally refers to an area perpendicular to the direction of flow.

A flexible water pipe part is preferably provided upstream of the bend area. There is less risk of flattening and a flexible water pipe part makes it easier to connect the shower device to a supply of shower water, for example to the basic device described in more detail below. The transition can e.g. B. done with a connection piece provided by the dimensionally stable water pipe part, onto which a hose is or is attached as a flexible water pipe part.

The connecting piece can preferably already have a flat flow cross section in the above sense. In this way, a corresponding cross-sectional shape is impressed on the flexible water pipe part, at least in the area of the connecting piece, whereby the hose can have a circular cross-section for reasons of simplification (in the unloaded state). For example, if it is flattened a little on the edge of a flat toilet bowl, it won't do any harm.

With regard to simple production and/or good cleaning options, it can be advantageous to connect the shower arm to the rest of the shower device in a latching manner and, accordingly, to be able to dismantle it in a latching manner. Then e.g. B. a more or less cylindrically shaped shower arm is snapped into a corresponding receptacle and thus also connected to it with regard to the water flow, the shower arm being removed without the need to dismantle the entire shower device and z. B. can be cleaned separately. Even if the entire shower installation is to be removed for cleaning purposes, cleaning is easier with the shower arm separated and certain areas are more accessible. The exemplary embodiment illustrates this.

In this context, the part held in place does not necessarily have to be the complete shower arm, but the base can, so to speak, already contain a piece that could be referred to as a shower arm part. This does not fundamentally change the above advantages. The telescopic mechanism, however, should be completely part of the part that can be removed.

In the fastening area already explained and in the bend area, the shower device can have a one-piece plastic part that contains the already mentioned locking connection device for the shower arm. In a preferred variant, this plastic part can make up the entire shower device in addition to the shower arm, with the exception of an element carrying the fastening surface, if present, and a flexible water pipe part, as long as it is attached to the bowl (i.e. with the exception of the base device). The transition between the dimensionally stable water pipe part and the flexible water pipe part can also be realized on the shower arm, as in the exemplary embodiment. This makes construction simple and cost-effective.

The shower arm, in particular as a structural unit that can be assembled and dismantled in a snap-in manner, can have a connection for a flexible water pipe part on a side opposite the shower nozzle. This can in particular be the connection piece already described with a preferably flat flow cross section. The downstream water pipe part with a dimensionally stable flow cross-section is then flat in the flow cross-section in any case in the bend area and preferably beyond that.

As the exemplary embodiment illustrates, this water pipe part then opens into an interior of the telescopic mechanism of the shower arm, the cross-sectional shape of which (perpendicular to the direction of movement of the telescopic mechanism) is determined by the telescopic members and their displaceability and is accordingly larger than the flow cross section of the upstream water pipe. In this respect, the shower arm (in the sense of a cylinder or telescopic mechanism) can have an extension as an extension on the upstream side, which ends in the connection, in particular the connection piece. The connecting piece can already be located in the fastening area, in particular between two adhesive pads.

In a preferred embodiment, the shower device discussed here is to be attached to the (toilet) bowl and connected via a water pipe to a supply device that houses other technical devices, in particular those with a larger space requirement. In particular, a water heater can be provided in this basic device, in particular an instantaneous water heater. The base device can in turn have a water tank with a water pump or, less preferably, a connection for connecting to a water pipe network, such as another hose for connecting to a tap. In this respect, a shower device that is as small and compact as possible with the elements that make sense at this point is then attached in the area of the actual bowl.

This attachment can z. B. via a downward-facing flat fastening surface, the shower device also being designed to be as flat as possible in the fastening area, e.g. B. relative to a length (parallel to the flow direction of the water in the water pipe) of the shower device in the fastening area at most 20%, preferably 15% high.

This means that the shower facility can be used in this area, for example. B. can be accommodated under a toilet seat, even without special adjustment of this seat, for example in the form of an increase compared to the toilet bowl.

The attachment can be done in various ways, for example by snapping or clamping with the creation of a positive fit with the edge of the bowl, by gluing, using suction cups and the like. The use of at least one adhesive pad, i.e. a flat cushion, has proven to be particularly advantageous, which preferably adheres to a smooth bowl surface without leaving any residue, for example on the surface, using a large number of microscopic suction devices a sanitary ceramic. This solution is residue-free (in contrast to adhesives), simple and easy to clean, and can also be implemented flat (in contrast to clamping devices or conventional suction cups) and, after simple cleaning, e.g. B. running water can be used many times. So can e.g. B. if cleaning is due anyway, the adhesive pad must also be cleaned before the shower device is installed the next time. A commercially available example is the Fischer brand “Vacuum Pad”.

A plurality of adhesive pads can leave space available in between for guiding a water pipe that has to be taken into account in terms of the overall height. In the exemplary embodiment, there are two adhesive pads and the flexible water pipe part runs between them, so that the overall heights do not add up.

Furthermore, the invention also relates to the use of the shower device for combination with the basic device.

Figur 1

eine perspektivische Ansicht einer erfindungsgemäßen Duscheinrichtung von unten links, und zwar einschließlich eines Stücks eines flexiblen Wasserleitungsteils;

Figur 2

die Ansicht aus Figur 1, jedoch mit entferntem Duscharm und ohne den Wasserleitungsteil aus Figur 1;

Figur 3

eine weitere perspektivische Ansicht der Duscheinrichtung von schräg oben hinten, jedoch ohne den flexiblen Wasserleitungsteil;

Figur 4

eine perspektivische Ansicht auf die Duscheinrichtung aus Figur 1, jedoch aus ungefähr entgegengesetzter Richtung und mit eingefahrenem Duscharm;

Figur 5

in Figur 4 entsprechender perspektivischer Ansicht den in Figur 2 fehlenden Duscharm in eingefahrenem Zustand;

Figur 6

den Duscharm aus Figur 5 in ausgefahrenem Zustand und als perspektivische Schnittdarstellung;

Figur 7

den Duscharm entsprechend Figur 6, jedoch in einer Schnittansicht;

Figur 8

eine Darstellung entsprechend Figur 7, jedoch in eingefahrenem Zustand des Duscharms;

Figur 9

eine perspektivische Gesamtansicht eines Basisgeräts zu der Duscheinrichtung aus den Figuren 1-8;

Figur 10

eine Unteransicht des Basisgeräts aus Figur 10 und

Figur 11

eine Darstellung des unteren Teils des Basisgeräts aus Figur 9 bei teilweise abgebautem Gehäuse.

The invention is explained in more detail below using an exemplary embodiment. This shows:

Figure 1

a perspective view of a shower device according to the invention from the bottom left, including a piece of flexible water pipe part;

Figure 2

the view Figure 1 , but with the shower arm removed and without the water pipe part Figure 1 ;

Figure 3

another perspective view of the shower device from diagonally above at the rear, but without the flexible water pipe part;

Figure 4

a perspective view of the shower facility Figure 1 , but from approximately the opposite direction and with the shower arm retracted;

Figure 5

in Figure 4 corresponding perspective view in Figure 2 missing shower arm when retracted;

Figure 6

the shower arm Figure 5 in extended state and as a perspective sectional view;

Figure 7

the shower arm accordingly Figure 6 , but in a sectional view;

Figure 8

a representation accordingly Figure 7 , but with the shower arm retracted;

Figure 9

a perspective overall view of a basic device for the shower device from the Figures 1-8 ;

Figure 10

a bottom view of the base device Figure 10 and

Figure 11

a representation of the lower part of the base device Figure 9 with the housing partially dismantled.

Figure 1 shows a shower device according to the invention with a shower arm 1, which is shown here in an extended state, i.e. with telescopic elements 8 and 9 protruding from the rest of the shower device on the right. The shower arm 1 is held in a locking manner in an otherwise largely one-piece plastic part 2, which is in Figure 2 is shown without the shower arm 1 for comparison. Also shows Figure 1 another flexible water pipe part 23 on the left edge, although only partially. This leads over a certain length from the actual use position of the shower device (on the edge of a toilet bowl) to a base device standing on the floor next to the toilet according to the Figures 9-11 .

To attach the plastic part 2, two adhesive pads are attached as a fastening device in a fastening area 3 on an underside of the plastic part 2. With these the shower facility can be removed Figure 1 pressed flat onto the flat edge of a standard toilet bowl and then sticks there. If the edge of the bowl and the adhesive pads 4 are sufficiently clean, many microscopic suction devices come into effect on the underside of the adhesive pads 4. This means that the shower facility can be removed at will and without leaving any residue and may need to be cleaned before reassembly.

The fastening area 3 is in the left part of the Figure 1 recognizable flat area, which merges in a bend area 5 into a deep holding device 6 which forms a locking device for holding the shower arm 1. This holding device 6 has (seen in the axial direction of the shower arm 1) essentially an inverted U-shape that is open at the bottom, compare Figure 2 and 3 , whereby it covers the shower arm 1 like a roof upwards and to the sides. The reference number 7 denotes locking projections for holding the shower arm 1; there is also one in the Figures 1 and 2 Opening pointing to the right for the telescopic elements 8 and 9 of the shower arm 1 narrows slightly downwards, as above all Figure 2 shows.

Between the two adhesive pads 4 there is a gap in which the flexible water pipe part 23 runs, and at one in the Figures 3 , 5-8 easily recognizable connecting piece 10 is connected to a rear part of the shower arm 1. For this purpose, the flexible line part 23 is simply pushed onto the connector 10, whereby this connector 10 has a highly elliptical cross-sectional shape, compare especially that Figures 3 and 5 , which forces the flexible shower water pipe part 23. Incidentally, if the overall height is a significant problem, the flexible water pipe part 23 can also be pressed somewhat flat between the flat structures holding the adhesive pads 4 in the fastening area 3.

The connecting piece 10 leads via a rigid water pipe part 11 into the first telescopic element 12, namely the actual cylinder part 12 of the shower arm 1, in which the telescopic elements 8 and 9 are also accommodated in the retracted state, compare Figures 5 and 8th . The rigid water pipe part 11 runs at an angle to the horizontal or the direction of the connecting piece 10, the angle according to Figures 7 and 8th between approximately 45° and 60° (depending on whether the upper or lower limit is considered). The rigid water pipe part 11 widens and leads the shower water into the cylinder part already mentioned, with the corresponding rear boundary of this cylinder part being designed obliquely and thus the Lower wall of the rigid water pipe part 11 continues in a certain sense, compare Figure 7 and 8th .

The rigid water pipe part 11 also has a flat-elliptical flow cross section downstream of the connecting piece 10, which is evident from the Figures 5-7 expands in the transition into the cylinder part. In any case, there is a flat flow cross section with an approximately elliptical shape upstream of the bend region 5, in the bend region 5 and also a little further downstream from it.

This means that shower water can be supplied to the shower arm 1 via the flexible water pipe part 23, which in turn is held on the toilet bowl with the plastic part 2 via an adhesive connection, but can be released from this plastic part 2 in a snap-locking manner. Accordingly, the shower arm 1 can be removed without completely dismantling the shower device and z. B. be cleaned. Furthermore, the separation into the two snap-connected parts, namely the shower arm 1 and the plastic part 2, has advantages in terms of production technology.

Incidentally, the plastic part 2 that actually holds the shower arm 1 as a holding device bends downwards at a clear angle compared to the fastening area 3, compare Figure 2 , and thus already gives the shower arm 1 its axial orientation diagonally downwards. In addition, the plastic part 2 largely protects the shower arm 1 from dirt when it is retracted, compare Figure 4 .

As already mentioned, the shower arm 1 has a telescopic mechanism with two movable telescopic elements 8 and 9, the cylinder part forming the first telescopic element 12, which accordingly accommodates the second telescopic element 8 (which accommodates the third telescopic element 9). The Figures 6 and 7 compared to the Figures 5 and 8th show the extended and retracted state, with the Figures 6 and 7 one between the rear sloping wall of the cylinder part on the one hand and a holding arm 13 in the third telescopic element 9 on the other hand shows a tensioned coil spring as a return spring 24. This counteracts the water pressure supplied via the water pipe, so that the retraction and extension of the shower arm can be controlled using the water pressure.

The second and third telescopic elements 8 and 9 have radial steps towards the outside at their respective proximal ends, which are designated by reference numbers 14 and 15 and each carry an O-ring for sealing. As the Figures 6 and 7 show, this sealing occurs in the extended state by resting against an inward-pointing radial collar at the respective distal end of the first and second telescopic elements 12 and 8, respectively. When retracted, however, this seal does not exist. Rather, an in Figure 7 and Figure 8 recognizable channel depression as a shower water guide 16, which is actually distributed three times over the circumference, the proximal radial projection 14 and leads water past it into the intermediate space 17 ( Figure 8 ) between the cylinder part, i.e. the first telescopic element 12, and the second telescopic element 8.

In addition, one leads into the Figures 6-8 Easily recognizable shower nozzle 18 water into an intermediate space 19 between the second telescopic element 8 and the third telescopic element 9. The water from the first-mentioned intermediate space 17 can pass through a distal annular gap within the radially inward-pointing distal collar of the cylinder part, but above all via an in Figure 8 Small opening marked 20 in the lower area of the annular gap emerges. This opening 20 is covered in the retracted state by a downward-pointing nose 21 at the distal end of the third telescopic element 9. The water from the gap 19 exits in a similar manner through the distal annular gap between the second telescopic element 8 and the third telescopic element 9.

So if there is a certain water pressure that is not yet sufficient to extend the shower arm 1, the spaces 17 and 19 and thus the Corresponding surfaces of the telescopic elements are rinsed. This also applies while driving out. If the water pressure is not abruptly switched off at the end of a shower, this also applies to the start-up and any period afterwards.

The Figures 6 to 8 Incidentally, show a swirl chamber 22 below and upstream of the shower nozzle 18, which relates to the prior art EP 2 628 546 is referred to and which is connected to an internal cavity located proximally in the third telescopic element 9 (and incidentally the internal cavities in the second and the first telescopic element), namely via a short axially extending channel piece.

The already described nose 21 at the distal end of the third telescopic element 9 also serves as a stop when retracting because it comes into contact with the distal end of the second telescopic element 8 at the bottom, namely in a niche specially provided for this purpose, compare Figure 1 . In addition, the nose 21 is long enough so that e.g. B. in the event of a jam or without water pressure, the shower arm 1 can also be extended manually. To do this, simply pull the nose 21 with a finger.

For the supply of those in the Figures 1-8 Shower device shown and explained above is a base device 30 according to Figures 9-11 responsible, which together provides a set as a mobile solution for upgrading an ordinary toilet into a shower toilet.

Figure 9 shows a water tank 31 with a substantially cuboid shape, which is placed on a base part 32 and covered at the top by a lid 33. The water tank 31 can consist of transparent or translucent material and display the water level. If necessary, it can simply be lifted upwards using two recessed grips, one of which is in Figure 9 visible and numbered 34, serve. After lifting the lid 33, the water tank 31 can then be filled, placed back on the base part 32 and closed again with the lid 33 become. Without the lid, the water tank is around 16.5 cm high and can therefore easily be placed under a tap, for example. B. to keep in a sink.

The base part 32 also essentially has a cuboid shape. It has no external switches or other controls other than what is mentioned below Figure 10 is explained. If the in Figure 9 If the visible housing cover is removed, the view will be as shown in Figure 11 , which is not explained in all details.

In any case, there is a central elastomer element 35, for which the housing cover has a central recess and into which a valve of the water tank 31 engages. Inside the elastomer part 35 you can see a central pin 36 with which the valve of the water tank 31 is automatically opened (and closed again when lifted). Furthermore, the elastomer part 35 is made in one piece with a hose 37 which leads to the water pump 38. The water pump 38 is mounted in a vibration-insulated manner to reduce noise and is connected to a water heater 39 in a manner not shown.

Figure 11 shows a lever 40 pointing approximately vertically upwards in front of the water heater, which has a second lever arm, not shown here, which is close to the floor and runs approximately at right angles to it. The second lever arm can have an in Figure 10 Push button 41 shown above can be pushed upwards and is articulated with its end opposite the transition (to the second arm). Accordingly, pressing the button 41 leads to an inward movement of the in Figure 11 shown vertical arm of the lever 40, which activates an electrical button hidden behind it and triggers the reset function of an overheating protection of the instantaneous water heater 39.

Incidentally, the base part 32 contains an electronic control 42 and some other parts that are not particularly relevant to the understanding of the present invention. The controller 42 has an interface according to the “Low Energy Bluetooth” standard and can z. B. can be addressed via an app on a mobile phone. This allows the user to do so without touching the base device 30 operate the shower function and also program the control 42. Only the reset function with the mechanical button 41 is an exception here.

Figure 10 shows a bottom view of the base part 32 Figure 9 . In addition to the button 41 already mentioned, there is a connecting piece 43 for one not shown here and in Figure 1 with its other end visible flexible water pipe part 23, which has a length of z. B. can have over a meter to ensure a flexible arrangement of the base device Figure 9 next to the toilet bowl. The water pipe leading to the nozzle 43 is in Figure 11 numbered 44 and leads from the instantaneous water heater 39.

You can also see in Figure 10 an electrical connection cable whose extension area and plug are omitted and which bears the symbol 45. This cable is wound around a flat pin 46, which is inserted into Figure 10 with its lowest section and slightly enlarged compared to the "remaining part" behind it. Accordingly, the remaining part of the cable 45 lies behind the visible surface, but is wrapped around a remaining part of the pin 46 approximately corresponding to the central oval 47. At the same time, the visible part of the pin 46 forms a stand and ensures that the in Figure 9 visible lower edge of the base part 32 hovers approximately 3 mm above the floor.

Claims (15)

1. Shower device for mounting on a bowl, in particular a WC, which shower device has

   a mounting portion (3) comprising a mounting device (4) for mounting on the bowl, and

   a shower arm (1) having a shower nozzle (18) provided therein for jetting shower water onto the abdomen of a user of the shower device,

   wherein the shower arm (1) comprises a telescopic mechanism having a first telescopic member (12) and a second telescopic member (8) for extending the shower arm (1) and for moving the shower nozzle (18) away from the mounting portion (3),

   wherein the shower device is adapted to actuate the telescopic mechanism by a water pressure of the shower water for extending the shower arm (1), and to retract the telescopic mechanism by a return spring (24) without water pressure or when the water pressure of the shower water is too low,

   and wherein the shower arm (1) has a shower water guide (16) in the shower arm (1), via which shower water guide (16) shower water is discharged when the shower arm (1) is not extended,

   characterised in that the shower device is adapted to operate initially at a water pressure at which the shower arm does not yet extend, so that a gap between the first (12) and the second telescopic element (8) of the telescopic mechanism can be flushed and/or the contents of the water conduit from a water heater to the shower nozzle (18) can be expelled, and in that the water pressure is increased only after this cleaning and/or cold water discharge operation.
2. Shower device according to claim 1, which is designed such that the shower water guide (16) becomes inactive by the shower arm (1) being extended.
3. Shower device according to any one of the preceding claims, wherein the shower water guide (16) is provided in the first telescopic element (12) of the telescopic mechanism, preferably as a lateral channel recess in an inner side of the first telescopic element (12), wherein shower water can be discharged via the shower water guide (16) when the shower arm (1) is not extended outside the further second telescopic element (8) of the telescopic mechanism accommodated in the first telescopic element (12).
4. Shower device according to claim 3, which has a distal annular gap between the first telescopic element (12) and the second telescopic element (8) and/or an opening additionally provided in a distal region, for the draining of the shower water.
5. Shower device according to any one of the preceding claims, wherein a swirl chamber (22) is provided upstream of the shower nozzle (18) for generating rotating water flows in the shower nozzle (18).
6. Shower device according to any one of the preceding claims, designed so that, when the shower arm (1) is not yet extended, shower water emerges via the shower nozzle (18) into an intermediate space (19) between an inner surface of the second telescopic element (8) and an outer surface of a third telescopic element (9) of the telescopic mechanism.
7. Shower device according to claim 6, which has a distal annular gap between the third telescopic element (9) and the second telescopic element (8) and/or an opening additionally provided in a distal region, for draining the shower water.
8. Shower device according to any one of the preceding claims, comprising a radial step (14) outwardly and a sealing ring resting there against at a proximal end of the second telescopic element (8) of the telescopic mechanism and, when a third telescopic element (9) is present, a further radial step (15) outwardly and a sealing ring resting there against at a proximal end of the third telescopic element (9).
9. Shower device according to one of the preceding claims, which has a water conduit for supplying the shower water to the shower nozzle (18), which conduit has a dimensionally stable flow cross-section at least in a bend area (5) between the mounting portion (3) and the shower arm (1) and which, with respect to the flow direction of the water from the mounting portion (3) to the shower arm (1), undergoes a change of direction of at least 20° in the bend area (5), downwards with respect to the mounted position, the flow cross-section being shorter in the vertical direction than in the horizontal direction at least in the bend area (5) with respect to the mounted position.
10. Shower device according to claim 9, comprising a flexible water conduit part (23) of the water conduit connected to the water conduit part with the dimensionally stable flow cross-section in the bend area (5), upstream thereof with respect to the flow direction.
11. Shower device according to claim 10, in which the flexible water conduit part (23) is connected to a connection piece (10) of the water conduit part with the dimensionally stable flow cross-section in the bend area (5), which connection piece (10) has a flow cross-section which is flatter in the vertical direction than in the horizontal direction, the flexible water conduit part (23) otherwise having a circular flow cross-section in the unloaded state.
12. Shower device according to one of the preceding claims, which has a latching connection device (7) for latching retention of the shower arm (1).
13. Shower device according to claim 9 and claim 12, comprising, in the mounting portion (3) and in the bend area (5) together, a one-piece plastic part (2) which further comprises the snap-in connecting means (7), namely in one piece at most with the exception of an element supporting a mounting surface of the mounting device (4), for example an adhesive pad, and a flexible water conduit part (23), if present.
14. Combination of a shower device according to any one of claims 10 to 13 and a mobile base unit (30) for supplying the shower device, which base unit (30) comprises a water heater (39) and preferably a water tank (31) with a water pump (38), and is connected to the flexible water conduit part (23) of the shower device.
15. Combination according to claim 14, wherein the base unit (30) is adapted to operate at a lower water pressure at the beginning of a shower and at a higher water pressure thereafter, wherein during the lower water pressure water standing in water conduit paths is expelled through the shower water guide (16) and during the higher water pressure shower water heated by the water heater (39) of the base unit (30) is expelled through the shower nozzle (18).

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