WO2018041399A1

WO2018041399A1 - Device for actuating a discharge valve of a wc flush tank

Info

Publication number: WO2018041399A1
Application number: PCT/EP2017/001023
Authority: WO
Inventors: Jürgen Burkhardt; Christian Koch
Original assignee: GROHEDAL Sanitärsysteme GmbH
Priority date: 2016-08-29
Filing date: 2017-08-29
Publication date: 2018-03-08
Also published as: EP3526412B1; EP3526412A1

Abstract

The invention relates to a device for actuating a discharge valve (19) of a WC flush tank (1), comprising at least one push-button (23, 25; 81) that, when manually push-actuated, sets the discharge valve (19) to an open position in which a quantity of flushing water can flow out of the discharge connector (5) of the WC flush tank (1). According to the invention, the device has at least one control valve (43) which can be actuated by the push-button (23, 25; 81) and is arranged in a control line (35) connected to a water supply grid. When the push-button (23, 25) is manually push-actuated, a volumetric flow rate (rh) of water can be set by means of the control valve (43), said volumetric flow rate of water being used to actuate the discharge valve (19).

Description

Device for actuating a drain valve of a toilet cistern

The invention relates to a device for actuating a drain valve of a toilet cistern according to the preamble of claim 1.

A toilet cistern has in common practice a connected to the water supply mains filling valve and a drain valve. About the example, float-controlled filling valve, the toilet cistern can be filled to a predetermined level with water. The drain valve is usually constructed of a drain pipe mounted on the bottom side drain pipe and a stroke adjustable overflow pipe. The overflow tube in its closed position closes a flow passage through the discharge nozzle. By a user-side pressure actuation of a pushbutton, the overflow pipe can be strokeverstellver in its open position in which a flushing water can flow out of the drain pipe of the toilet cistern. The pushbutton is in a conventional toilet cistern via a mechanical linkage in operative connection with the overflow pipe.

In contrast to this, from EP 1 719 846 A2 a generic waste fitting is known, in which the pushbutton is not connected to the overflow pipe via a mechanical linkage but via a pneumatic system. The pneumatic system has a first bellows positioned on the pushbutton, which is connected via a pneumatic line to a second bellows positioned on the overflow pipe. With a pressure actuation of the push button, the first bellows is compressed and thus generates an overpressure which can be acted on the second bellows. Due to the pressurization of the second bellows expands, whereby the overflow pipe is adjusted to its open position. The above pneumatic system is both space-consuming and component-intensive. The realization of the pneumatic system is therefore associated with a high cost and perform complicated assembly technology.

CONFIRMATION COPY The object of the invention is to provide a device for actuating a drain valve of a toilet cistern, which in comparison to the prior art space-reduced and reduced component realized. The object is solved by the features of claim 1. Preferred embodiments of the invention are disclosed in the subclaims.

According to the characterizing part of claim 1, the device has at least one control valve which is actuated by the push-button and is arranged in a control line connected to a water supply network. When manual pressure actuation of the pushbutton by means of the control valve, a water flow rate is adjustable, with which the drain valve is controlled.

In departure from the above prior art can be dispensed with according to the invention in the pneumatic system on a bellows, the hubverstellt the overflow pipe at a positive pressure. Rather, the pneumatic system according to the invention has exactly one pneumatic actuator which can be acted upon by a negative pressure for the stroke adjustment of the overflow pipe. The waste set may also have a vacuum unit which is fluidically connected to the pneumatic actuator. In a user-side activation, the vacuum unit generates a negative pressure acting on the pneumatic actuator to perform a stroke adjustment of the overflow pipe.

The pneumatic system may be realized as a bellows, a piston-cylinder unit or as a membrane lifting system. By way of example, the membrane lifting system can have at least one working chamber which can be subjected to negative pressure and which is delimited by a deformable membrane. The deformable membrane can be connected to the overflow pipe. At a negative pressure acting on the working chamber, the membrane may deform and stroke the overflow tube accordingly. In terms of a particularly simple as well functional design, the pneumatic actuator may be a bellows, which contracts like an accordion when subjected to a negative pressure and in an accordion-like manner pulls apart (ie expanded) at a negative pressure relief. In a technical implementation, the vacuum unit may be water-bearing, that is, a vacuum nozzle or a water jet pump. The vacuum nozzle / water jet pump can be connected via a vacuum line to the pneumatic actuator. If the vacuum nozzle / water jet pump is water-conducting, therefore, air is sucked out of the pneumatic actuator, that is, generates a negative pressure in the pneumatic actuator.

The above water-conducting negative pressure unit can have a throttle point with a flow cross-sectional constriction between its water inlet side and its water outlet side in the manner of a Venturi nozzle. The vacuum line may preferably open at the throttle point in the flow channel of the vacuum unit.

A space-reduced and compact arrangement of the pneumatic system according to the invention is advantageous. Against this background, the pneumatic actuator (that is, for example, the bellows) in the waste set-up direction can be arranged in particular in alignment above the overflow pipe. The pneumatic actuator can preferably be connected to the overflow pipe via a rigid connecting element, which, for example, extends the overflow pipe coaxially upwards. Alternatively and / or additionally, viewed in the drain assembly high direction, the vacuum unit can be arranged in particular in alignment above the pneumatic actuator, whereby a particularly space-reduced design of the pneumatic system is achieved.

The water-conducting vacuum unit may be connected at its water inlet side to a control line which is connectable to the water supply network. Preferably, the control line from a leading to a filling valve of the toilet cistern supply line branch. In this case, the already existing line pressure for the negative pressure generation in the vacuum unit is used without any additional external energy (for example, the user's pressure or electrical energy) would be required. The water-bearing vacuum unit can open with its water outlet directly into the interior of the toilet cistern.

The above embodiment variant is particularly advantageous in a toilet repair measure in which the water supply to the toilet cistern is shut off at an angle valve in preparation. In this case, the water supply to the toilet cistern and to the vacuum unit is interrupted. In a conventional toilet cistern, where the push button is connected to the drain valve via a mechanical linkage, the installer must empty the toilet cistern before starting the repair in order to avoid an outflow from the toilet cistern in the event of unintentional push button actuation , According to the invention, such a precautionary emptying of the toilet cistern can be omitted for the following reason: Because of the angle valve shut-off, no water can be passed through the control line, so that the vacuum unit can not generate any negative pressure. The drain valve thus remains reliably closed even in the event of unintentional actuation of the pushbutton.

As already mentioned above, the negative pressure unit can be activated on the user side. In the case of a water-conducting vacuum unit can be arranged for this purpose in the negative pressure unit leading control line, that is, upstream of the water-conducting vacuum unit, a user-actuated control valve. By a user-side actuation of the control valve, the guided through the vacuum unit water flow rate can be adjusted, which in turn correlates with the negative pressure generated in the vacuum unit. By way of example, the control valve may be a time-controlled actuation valve, for example a so-called self-closing valve. In a technical implementation, the control valve may comprise a control piston which is lift-adjustable in a valve housing. The control piston can be adjusted by means of at least one user-operable pushbutton. In its non-actuated position, the control piston is spring-biased to a closed position in which a spool valve disk is in sealing engagement with a valve seat fixed to the housing, thereby closing a flow path through the control valve. When a pressure actuation of the pushbutton via a Tastenhubweg the control piston is moved against the spring biasing force in its open position. In the control piston open position of the flow path is released by the control valve, whereby the water-conducting vacuum unit is flowed through with water. In a pressure relief of the push button, however, the control piston is reset under the action of the spring biasing force on a Rückstellhubweg back to its closed position.

The length of the above Tastenhubweges of the pushbutton correlates with a reset time interval within which the control piston is reset after a push-button discharge back to its closed position. Within the reset time interval, the water-carrying vacuum unit flows through the water volume flow and a negative pressure is generated, which acts on the pneumatic actuator. This means that the key travel length has a direct influence on the flushing water quantity flowing out of the toilet cistern. To set a maximum possible Tastenhubweges of the pushbutton and thus to set a flushable amount of flushing the user-side pushbutton can be assigned a Hubeinstellglied that sets the maximum Tastenhubweg the pushbutton and thus the reset time interval. In a technical embodiment, the waste set may have a first pushbutton, upon actuation of which a large amount of flushing water flows out of the toilet cistern, and a second pushbutton, upon actuation of which a small amount of flushing water is expelled from the toilet bowl. Cistern flows out. Depending on the operation of the first or second push button, the user can thus determine the amount of flushing water.

The two pushbuttons can be connected to the control piston in a force-transmitting manner, in particular, for example with the interposition of a cross-beam, in such a way that the second push-button remains in its rest position during the pressure actuation of the first push-button. The Tastenhubweg traveled by one of the pushbuttons is thus identical to the piston stroke traveled by the control piston. Each of the two pushbuttons is preferably assigned a respective Hubeinstellglied, with the aid of which the maximum possible Tastenhubwege the first and second push buttons are independently adjustable. By means of such a control valve different amounts of flushing water can be variably adjusted.

The push button described above is only pressure actuated, i. only axially parallel to the housing axis arranged adjustable in the push button housing. In an alternative alternative embodiment, the pushbutton can be designed as a pressure and rotatable rotary pushbutton, with the simple operation of the desired flushing amount is variable. The rotary pushbutton is designed so that the available Tastenhubweg is variable or adjustable in a rotary operation. In contrast, in the pressure actuation of the rotary pushbutton, the drain valve is adjustable in the open position to drain the set flushing volume.

The rotary actuation and the pressure actuation of the rotary pushbutton can take place consecutively. In this case, the user first sets by rotary operation the available Tastenhubweg (that is, the desired flushing amount) and starts in a subsequent operation step by pressing the flushing. In this way, the desired purge amount is adjustable in a simple operating philosophy between a minimum and maximum amount (that is, for example, between 1 liter and 9 liters). Alternatively, the rotary actuator and the pressure actuation also take place simultaneously, ie be performed superimposed on each other.

In a technical implementation of the above invention, the at least one Hubeinstellglied be rotationally coupled to the rotary pushbutton. In a non-pressure-actuated rest position of the rotary pushbutton, the Hubeinstellglied can be spaced by the Tastenhubweg of a rotationally fixed control contour. When pushing the rotary pushbutton, the Hubeinstellglied proposes exhausting the Tastenhubweges against the rotationally fixed control contour. By means of the rotary actuation of the rotary pushbutton about the axis of rotation of the axial distance, that is, the available Tastenhubweg, between the Hubeinstellglied and the rotationally fixed control contour is varied.

In a preferred embodiment, the rotary pushbutton can be rotatably mounted in a rotationally fixed manner to a building wall mounted push-button housing about a housing axis and stroke adjustable. The non-rotatable control contour can be formed directly in the button housing in this case.

Preferably, the probe housing can be designed as a hollow cylinder, wherein the rotary pushbutton can be arranged within the hollow cylindrical probe housing. The button housing can be mounted by way of example via a latching connection to a wall-mounted decorative panel. The rotary pushbutton can be arranged radially inside the hollow-cylindrical pushbutton housing. Its Hubeinstellglied can be realized as a control cam, which can protrude example, radially outward, in a housing-fixed link guide, which is exemplified on the inside of the hollow cylindrical button housing.

When a push-button operation of the rotary pushbutton, the control cam of the rotationally coupled with the rotary pushbutton Hubeinstellgliedes strike against the rotationally fixed control contour of the housing fixed link guide. An axial movement, that is a lifting movement of the Rotary pushbutton can be defined in this case between the rotationally fixed control contour and one of which axially spaced axial stop of the housing-fixed slotted guide. In contrast, a rotational movement of the push-push button by means of circumferential rotary stops of the slotted guide may be limited.

In the above construction, in a non-pressure-actuated rest position of the rotary pushbutton, the following situation arises: Thus, in this case, the control cam, i. pressed with the rotary pushbutton Hubeinstellglied, pressed with a first stop surface under the action of the spring biasing force against the axial stop of the housing-fixed link guide. Conversely, the control cam is released from the axial stop of the housing-fixed link guide in a pressure actuation of the rotary pushbutton and suggests this with a second stop surface against the control contour of the housing-fixed slotted guide. The peripheral rotary stops of the housing-fixed slotted guide also clamp a rotation angle about which the rotary pushbutton can be actuated to a maximum degree of rotation.

By way of example, the axial stop of the housing-fixed slide guide can have a contact surface cooperating with the control cam of the stroke adjusting member, which contact surface lies completely in a transverse plane perpendicular to the housing axis. This means that in the case of a rotary actuation of the not yet depressed rotary pushbutton no additional stroke adjustment of the rotary pushbutton takes place.

In contrast to the above axial stop the slotted guide cooperating with the control cam of the Hubeinstellglieds contact surface of the housing-fixed control contour take an arbitrarily adapted circumferential course to provide depending on the rotational position of the rotary pushbutton different sized Tastenhubwege available. In a first preferred variant, the contact surface of the housing-fixed control contour can be continuous in an oblique plane inclined to the housing axis. In this case, the contact surface of the housing-fixed control contour extends steplessly and smoothly in the circumferential direction. tung. Alternatively, the contact surface of the housing-fixed control contour can have stepped or offset partial surfaces in the axial direction. In addition, the contact surface of the control contour may have one or more elevations, which can be perceived in a rotational actuation of the already depressed rotary pushbutton as over-pressure by the user pressure points. In this way, different rotational positions of the rotary pushbutton can be perceived haptically by the user. In the case of a control contour with several elevations, the intermediate areas bounded by the elevations can be perceived as segmentations. In one embodiment variant, the contact surface of the axial stop fixed to the housing can have at least one surface structure, for example a raised portion or depression. In a rotational actuation of the non-depressed rotary pushbutton, the survey / depression can be perceived haptically and / or acoustically as a pressure point that can be overrun by the user. Alternatively, at least one segmentation can be perceived by the user when implementing the housing-mounted axial stop with several elevations / depressions.

In a specific embodiment, a push-button support member may be rotatably mounted and adjustable in height within the hollow cylindrical button housing. The push-button support part can be made somewhat disc-shaped, with a view-side cap of the rotary pushbutton mounted thereon in a rotationally fixed manner. On the other hand, on the axially opposite side, the control piston can be mounted in a pressure-transmitting and rotationally fixed or rotationally coupled manner. With regard to the smoothest possible rotary actuation of the rotary pushbutton, it is preferred if a rotational decoupling is present between the probe carrier part and the control piston. In this way, it is ensured that during a rotary actuation of the rotary pushbutton of the control piston is not rotated, but rather this is stationary. The above-mentioned Hubeinstellglied (ie the control cam) can also be directly on the probe support member, for example, uniform material and integrally formed. In a technical implementation, the rotary pushbutton, in particular its probe carrier part, and the pushbutton housing, in which the rotary pushbutton is mounted rotatably and stroke adjustable, have cooperating elevations and / or depressions. These can be haptically and / or audibly perceptible in the case of a rotary actuation of the rotary pushbutton, in each case as a pressure point which can be over-rotated by the user. Possibly. several surveys / depressions may be perceived by the user as at least one segmentation.

The advantageous embodiments and / or further developments of the invention explained above and / or reproduced in the subclaims can be used individually or else in any desired combination with one another except, for example, in the case of unambiguous dependencies or incompatible alternatives.

The invention and its advantageous embodiments and further developments and advantages thereof are explained in more detail below with reference to drawings.

Figure 1 in a rough schematic partial sectional view of a toilet cistern with a filling valve and a drain valve;

FIG. 2 is a detailed view of a structural unit comprising a vacuum nozzle and a bellows;

Figure 3 is a sectional view taken along the section plane A-A of Figure 1;

Figures 4 and 5 are views corresponding to the figure 3 with actuated first push-button and actuated second push-button;

Figures 6 and 7 are views showing the pneumatic system in a negative pressure of the bellows; 8 shows a pneumatic system of the toilet cistern according to a further embodiment; FIGS. 9 and 10 show a further embodiment of a waste fitting;

Figures 11 and 12 are different views of a rotary pushbutton according to another embodiment; Figure 13 is a view corresponding to Figure 12 in a sectional view;

Figure 14 in an enlarged partial perspective view also a sectional view of the rotary pushbutton; Figure 15 is a side sectional view of the rotary pushbutton, in which the valve housing and the control piston are omitted;

Figures 16 and 17 each have a button housing and a button-carrier part in isolation. In the figure 1 is a built-in a toilet cistern 1 expiration set with associated

Pneumatic system 21 shown. The drain fitting has the Spülkastenboden 3 to a drain pipe 5, which is not shown in flow communication with a toilet bowl. The discharge nozzle 5 rests with a radially widened circumferential annular shoulder 7 (FIG. 7) on the opening edge region of a bottom-side outlet opening of the cistern bottom 3. The annular shoulder 7 of the downcomer 5 is extended upward with a circumferential housing wall 9 formed thereon, in which throughflow openings 11 (FIG. 1 or 7) are formed, which are uniformly distributed in the circumferential direction. Radial inside and coaxial with the housing wall 9, a stroke-adjustable overflow pipe 13 is arranged, with its radially outer Valve plate 15 (Fig. 1 or 7) rests on a formed on the annular shoulder 7 valve seat 17 liquid-tight. The circulation pipe 13 forms, together with the discharge nozzle 5, a drain valve 19 which can be actuated via the pneumatic system 21 by push buttons 23, 25, which are delimited by a decorative plate 24 in FIG. 1 and installed in a building wall 28. During a pressure actuation of the push buttons 23, 25, the circulation pipe 13 is stroke-adjusted by means of the pneumatic system 21 from a closed position shown in FIG. 1 into an open position (FIGS. 6 and 7).

In the toilet cistern 1, a filling valve 27 is also installed, with which the toilet cistern 1 is filled to a predetermined level with water. The filling valve 27 is connected on the inlet side to a supply line 29 leading to the water supply network. In addition, the filling valve 27 is controlled by means of a float 32, which is arranged height-adjustable on an inlet pipe 34. As is further apparent from the figure 1 or 2, the pneumatic system 21 as a pneumatic actuator 31 has a bellows and vacuum unit as a vacuum nozzle 33. The vacuum nozzle 33 is constructed in the manner of a Venturi nozzle and connected on the inlet side to a control line 35 which branches off from the supply line 29. In the control line 35, a control valve 43 is arranged, which can be actuated via the user-operable pushbuttons 23, 25. In the case of a pushbutton actuation, a water flow path from the supply network to the vacuum nozzle 33 is opened in the control valve 43 and the latter is flowed through by a water volume flow m (FIG. 3 or 6). In this way, a negative pressure is generated in the vacuum line 37, with which the bellows 31 is contracted. The vacuum nozzle 33 opens into the interior of the toilet cistern 1. The vacuum nozzle 33 has between its Wassereinlass- and Wasserauslassseite a throttle point with a Strömuhgsquerschnitts constriction at which a vacuum line 37 opens into the nozzle channel of the vacuum nozzle 33. The vacuum nozzle 33 and the bellows 31 are under Forming of a unit B (Fig. 2) directly connected to each other. For this purpose, the vacuum nozzle 33 in the figure 2, a connection piece 39, through which the vacuum line 37 leads. On the connection piece 39 of the vacuum nozzle 33, a pipe extension 41 of the bellows 31 is pushed and optionally fixed thereto by means of a fixing clamp, not shown. The bellows 31 is coupled in Fig. 2 with its remote from the pipe socket 41 bellows bottom 45 to a connecting rod 47, which in turn is attached to the upper end of the overflow pipe 13.

The control valve 43 shown in FIG. 3, together with a pushbutton housing 49, in which the two pushbuttons 23, 25 are arranged, likewise form a structural unit. In FIG. 3, the control valve 43 has a control piston 53 which is lift-adjustable in a valve housing 51. The control piston 53 is connected with the interposition of a cross-beam 55 force-transmitting with the two push buttons 23, 25. In the non-use position shown in FIG. 3, the control piston 53 is spring-biased by means of a spiral spring 57 into a closed position. In the closed position shown in Figure 3, the control piston 53 with its valve plate 59 in sealing engagement with a housing-fixed valve seat 61, whereby the flow path is closed by the control valve 43.

The first and second pushbuttons 23, 25 are adjustable in an open position by way of maximum possible key strokes hi, h ₂ against the spring biasing force generated by the spiral spring 57 (FIG. 4 or 5). In the open position, the flow path through the control valve 43 is released. At a pressure relief of each pressed pushbutton 23, 25 of the push button 23, 25 is restored under the action of the spring biasing force of the coil spring 57 back to its closed position.

To set the above-mentioned Tastenhubwege hi, h ₂ , the control valve 43 has two Hubeinstellglieder 63, 65 which are arranged adjustable in a stroke direction in the button housing 49. Each of the stroke adjusting members 63, 65 is in each case assigned to one of the pushbuttons 23, 25. assigns. With the help of Hubeinstellglieder 63, 65, a maximum possible Tastenhubweg hi, h _{2 of} the pushbutton 23, 25 can be adjusted. The Hubeinstellglieder 63, 65 act as depth stops that limit the stroke of each pushbutton 23, 25. In the event of a pushbutton relief taking place after the pushbutton actuation, the control piston 53 automatically returns to its closed position under the action of a spring force, namely within a reset time interval. Within the reset time interval, the flow path through the control valve 43 remains open, so that further a water volume flow m is passed through the vacuum nozzle 33 and thereby a negative pressure is generated. The length of the reset time interval correlates with a Tastenhubweg length. That is, with a large key stroke length, the return of the pushbutton 23, 25 takes longer than with a shorter key stroke length. Accordingly, at a large Tastenhubweg length a larger amount of flushing water flow out of the toilet cistern 1 than at a smaller Tastenhubweg length.

By separate settings of Hubeinstellglieder 64, 65 thus each of the push buttons 23, 25 each have their own, flowing out of the toilet cistern 1 flushing water amount can be assigned. By way of example, upon actuation of the first pushbutton 23, a small amount of flushing water can flow out of the toilet cistern 1. In contrast, upon actuation of the second pushbutton 25, a larger amount of flushing water can flow out of the toilet cistern 1.

With regard to a compact, space-saving design of the pneumatic system 21, according to the figures, the bellows 31 in the waste set-up direction are positioned in alignment above the overflow pipe 31. In addition, the vacuum nozzle 33 is positioned approximately in alignment above the bellows 31. FIG. 8 shows a further development of the pneumatic system 21 shown in the preceding figures. In contrast to the preceding figures, a bellows guide 67 is additionally provided in FIG. 8 in order to ensure perfect contraction and expansion of the bellows 31. The bellows guide 67 has a hollow cylindrical, cup-shaped bellows housing 69 which is rotationally symmetrical to a housing axis G and is fixed with its cup bottom 71 to the vacuum nozzle 33. On the outer circumference of the bellows housing 69 guide channels 73 are formed, in which guide pins 75 are guided axially parallel to the housing axis G. The guide pins 75 are attached via transverse webs 77 on the connecting rod 47.

In FIGS. 9 and 10, in contrast to the preceding exemplary embodiments, an additional third pushbutton 26 is provided, which is delimited by the decorative plate 30 together with the other two push buttons 23, 25. With a pressure actuation of the third pushbutton 26, a mean amount of flushing water can flow out of the toilet cistern 1. The third pushbutton 26 is, as well as the other two pushbuttons 23, 25, with the interposition of the crossbeam 55 force-transmitting in conjunction with the control piston 53. In addition, the third pushbutton 26 is associated with a Hubeinstellglied not shown, with which the maximum possible Tastenhub the third Pushbutton 26 is adjustable. As can be seen from FIG. 10, each of the stroke adjusting members is assigned an adjusting wheel 79, which can be rotationally actuated by the user. By means of a rotary actuator, the respectively associated Hubeinstellglied can be adjusted.

FIGS. 11 to 17 show a further exemplary embodiment in which the pushbuttons 23, 25, 26 are replaced by a single rotary pushbutton 81, which is delimited by the decorative plate 24 in FIG. 11 and in the building wall (FIG. 1). is installable. The rotary pushbutton 81 is both pressure and rotatable. In a pressure actuation by a Tastenhubweg h ₃ (Figure 13), the drain valve 19 (Figure 1) is moved to its open position. In addition, in a rotary operation of the rotary pushbutton 81 of the Tastenhubweg h ₃ (Figure 13) can be varied or adjusted.

The structure of the rotary pushbutton 81 shown in FIGS. 11 to 17 is described below. For example, the rotary pushbutton 81 has a face-side cap 83 (FIGS. 12 to 14) which is fixed on the top side of a disc-shaped pushbutton carrier part 85 is mounted. In addition, the control piston 53 is screwed with its upper end of the piston on the probe support member 85. The control piston 53 is guided coaxially with the housing axis G (FIG. 12 or 13) through an upper valve housing part 87 (FIG. 13 or 14) of the control valve 43 and with its valve plate 59 in sealing engagement with the valve seat 61 fixed to the housing From Fig. 13 shows. In the state shown in FIG. 13, the flow path through the control valve 43 is closed.

The valve housing part 87 is rotatably mounted in the figure 13 on an underside of the probe housing 49. The push button housing 49 is designed in accordance with the figure 16 in approximately hollow cylindrical, with a step-like upward flared cylinder wall, in accordance with the figure 16 a total of four uniformly circumferentially distributed receiving pockets 89 are formed. These are in the figure 12 or 13 in latching connection with corresponding locking tabs 91 of the decorative plate 24. The cap 83, the probe support member 85 and the control piston 53 form a movement-coupled in the stroke direction unit B (Fig. 13), in the figure 13 on the coil spring 57 is spring-biased upward against an axial stop 93 (eg, FIG. 12 or 16) described later in the key housing 49. For this purpose, the spiral spring 57 with its lower spring base is supported on the outside mounted on the valve housing part 87 fixed to the housing and with its upper spring base with the interposition of a rotary decoupling disk 106 against the button support member 85 is supported.

In contrast to the preceding embodiment, the two Hubeinstellglieder 95 are not installed as separate elements in the probe housing 49 in Figures 11 to 17, but but rather rotatably coupled with the rotary pushbutton 81. The Hubeinstellglieder 95 are presently realized as two with respect to the housing axis G diametrically opposed control cam. Each of the control cams 95 is engaged with window-like gate guides 97 formed in the cylinder wall of the keytop housing 49. Each of the slotted guide 97 is approximately wedge-shaped in the circumferential direction (eg, FIG. 12) and formed with the already mentioned above axial stop 93 and with a control contour 99, which define a stroke in the axial direction. In addition, each of the slide guides 97 circumferentially opposite rotary stops 101, which define a maximum angle of rotation of the rotary pushbutton 81.

In the figure 12 or 14 of the rotary pushbutton 81 is shown in a non-pressure-actuated rest position. It follows that the control cam 95 is pressed with an upwardly facing first stop surface 102 (Fig. 17) under the action of the spring biasing force of the coil spring 57 against the upper axial stop 93 of the housing-fixed slide guide 97. In this non-pressure-actuated rest position of the rotary pushbutton 81 (FIG. 12), the control cam 95 is spaced apart by the key stroke h ₃ from the control contour 99 of the sliding guide 97 fixed to the housing. In the case of a pressure actuation of the rotary pushbutton 81, the control cam 95 is released with its first stop surface 102 from the axial stop 93 of the slotted guide 97, and the control cam 95 comes into abutment with the corresponding contact surface 105 (FIG. 17) with its second stop surface 103 (FIG. Fig. 16) of the control contour 99 of the housing-fixed slotted guide 97th

According to FIG. 12, the axial stop 93 of the slide guide 97 which is fixed to the housing lies with its contact surface in a transverse plane Q perpendicular to the housing axis G. In contrast, the contact surface 105 (FIG. 16) of the control contour 99 lies in a slanted oblique plane S.

(Figure 12), wherein the contact surface 105 of the control contour 99 extends smoothly and continuously in the circumferential direction. In this way, the available Tastenhubweg h _{3 can be} varied simply by a rotary actuation of the rotary pushbutton 81, starting from a minimum Tastenhubweg h ₃ , as provided in the figure 12. When the rotary pushbutton 81 is rotated in a clockwise direction, the control cam 95 is displaced in the direction of the opposite rotary stop 101, as a result of which the available key stroke h _{3 increases} to a maximum value.

LIST OF REFERENCE NUMBERS

1 toilet cistern

3 cistern floor

5 drain connection

7 ring shoulder

9 housing wall

11 flow openings

13 overflow pipe

15 valve plates

17 valve seat

19 drain valve

21 pneumatic system

24 decorative plate

23, 25, 26 Pushbuttons

27 filling valve

28 building wall

29 supply line

30 decorative panel

31 bellows

32 swimmers

33 vacuum nozzle

34 inlet pipe

35 control line

37 vacuum line

39 connecting piece

41 pipe socket

43 control valve

45 bellows bottom 47 connecting element

49 push button housing

51 valve housing

53 control spool

55 crossbar

57 spiral spring

59 spool valve disk

61 housing-resistant valve seat

63, 65 Hubeinstellglieder

ΙΪΊ Water volume flow

G housing axis

67 bellows guide

69 bellows housing

71 pot bottom

73 guide channels

75 guide pins

77 crossbars

79 adjusting wheels

81 rotary pushbutton

83 cap

85 button carrier part

87 Valve housing part

89 receiving pockets

91 locking tabs

93 axial stop

95 control cams

97 Sliding guide

99 control contour 101 rotation stops

102 first stop surface

103 second stop surface

105 contact surface of the control contour 99

106 turn-off disc

Q transverse plane

S inclined plane

B motion-coupled unit in the stroke direction

Claims

claims

Device for actuating a drain valve (19) of a toilet cistern (1), with at least one pushbutton (23, 25, 81), in whose manual pressure actuation the drain valve (19) is adjusted to an open position, in which a flushing water quantity from the outlet pipe (5) of the toilet cistern (1) can be flowed out, characterized in that the device has at least one control valve (43) which can be actuated with the pushbutton (23, 25; 81) and in a control line connected to a water supply network (35) is arranged, and that in the manual pressure actuation of the pushbutton (23, 25, 81) by means of the control valve (43), a water flow rate (rh) is adjustable, with which the drain valve (19) is controllable.

Device according to Claim 1, characterized in that the control valve (43) has a control piston (53) which can be adjusted in height in a valve housing (51), which can be adjusted by means of at least one user-operable pushbutton (23, 25, 26; 81) and into a closed position is spring-biased, in which a spool valve plate (59) in sealing engagement with a housing-fixed valve seat (61) and a flow path through the control valve (43) closes, and which control piston (53) at a pressure actuation of the pushbutton (23, 25, 26 81) via a Tastenhubweg (hi, h ₂ ; h ₃ ) is adjusted against the spring biasing force in its open position, in which the flow path through the control valve (43) is released, and at a pressure relief of the pushbutton (23, 25, 26) is reset under the action of the spring biasing force back into its closed position, and that in particular the length of the Tastenhubwegs (hi, h ₂ , h ₃ ) with the length of a backrest ell-time interval correlates, within which the control piston (53) is reset after a push-button discharge back to its closed position, within the reset time interval, the negative pressure unit (33) with the water flow rate (m) flows through and a negative pressure is generated. Apparatus according to claim 2, characterized in that the user-operable pushbutton (23, 25, 26, 81) of the control valve (43) is associated with a stroke adjusting member (63, 65, 95) with which a maximum possible key stroke (hi, h ₂ h ₃ ) of the pushbutton (23, 25, 26, 81) and thus the reset time interval is adjustable.

Device according to one of the preceding claims, characterized in that at least one first pushbutton (23), upon actuation of which a small amount of flushing water flows out of the WC cistern (1), and a second pushbutton (25) is provided, upon actuation of which a large push button Rinse water amount from the toilet cistern (1) flows out, and that in particular a third push-button (26) is provided, upon actuation of a medium amount of flushing water from the toilet cistern (1) flows out.

Device according to one of the preceding claims, characterized in that the drain valve (19) consists of a cistern (1) mounted drain port (39) and a stroke-adjustable overflow tube (13) is constructed, which in its closed position a flow passage through the discharge nozzle (5). closes, and that in particular the overflow pipe (13) cooperates with a pneumatic actuator (31), with the overflow pipe (13) is adjustable in its open position at a pressurization, in which the amount of flushing water from the outlet pipe (5) of the toilet cistern ( 1) can be flowed out, and that in particular for the stroke adjustment of the overflow pipe (13), the pneumatic actuator (31) can be acted upon by a negative pressure, and that the drain fitting has a water-conducting vacuum unit (33) which is connected to the pneumatic actuator (31) and in a user-side activation acting on the pneumatic actuator (31) Unterdr uck generated.

Apparatus according to claim 5, characterized in that the pneumatic actuator (31) is realized as a bellows, a piston-cylinder unit or a membrane-lifting system having at least one pressurizable working chamber, the is limited on a deformable membrane, which is in communication with the overflow pipe (13), and in particular that the vacuum unit (33) is a water-flowable vacuum nozzle or water jet pump, which is connected to a vacuum line (37) with the pneumatic actuator (31), and that air can be sucked out of the pneumatic actuator (31) when the vacuum nozzle (33) or water jet pump flows through it.

Device according to one of claims 5 or 6, characterized in that the pneumatic actuator (31) contracts under a negative pressure in a stroke direction, under stroke adjustment of the overflow pipe (13) in its open position, and that the pneumatic actuator ( 31) at a negative pressure relief pulls under stroke adjustment of the overflow pipe (13) in its closed position and in particular under the action of gravity.

Device according to one of claims 1 to 3, characterized in that the pushbutton is a pressure and drehbetätigbarer rotary pushbutton (81), and that in particular in the pressure actuation of the rotary pushbutton (81), the drain valve (19) adjustable in the open position is and at the rotary actuation of the Tastenhubweg (h ₃ ) is variable or adjustable.

Apparatus according to claim 8, characterized in that for adjusting the Tasten- stroke (h ₃ ), the at least one Hubeinstellglied (95) is rotationally coupled to the rotary pushbutton (81), and that the Hubeinstellglied (95) in a non-pressure-actuated rest position of Rotary pushbutton (81) by a distance which is identical to the Tastenhubweg (h ₃ ) is spaced from a rotationally fixed control contour (99), and that the Hubeinstellglied (95) in the pressing operation of the rotary pushbutton (81) with exhaustion the Tastenhubwegs (h ₃ ) abuts against the rotationally fixed control contour (99). Apparatus according to claim 9, characterized in that by rotational actuation of the rotary pushbutton (81) about an axis of rotation (G) of the distance, that is the Tastenhubweg (h ₃ ) between the Hubeinstellglied (95) and the rotationally fixed control contour (99) is variable , and that in particular the rotary pushbutton (81) in a non-rotatable, in particular wall-mountable push-button housing (49) about a housing axis (G) is rotatably mounted and adjustable in stroke, and that the non-rotatable control contour (99) on the button housing (49). is trained.

Device according to one of claims 9 or 10, characterized in that with the rotary pushbutton (81) rotatably coupled Hubeinstellglied (95) is a control cam which abuts against the rotationally fixed control contour (99) at a pressure actuation of the rotary pushbutton (81) , and / or that the non-rotatable control contour (99) is part of a, in particular housing-fixed link guide (97), and that a key stroke of the rotary pushbutton (81) is limited to a stroke between the control contour (99) and an axial stop ( 93) of the slotted guide (97) is defined, and that in particular a rotational movement of the rotary pushbutton (81) is limited to a rotational angle which is clamped between circumferential rotary stops (101) of the slide guide (97).

Apparatus according to claim 11, characterized in that in a non-pressure-actuated rest position of the rotary pushbutton (81) of the control cam (95) with its first stop surface (102) under the action of Federvorspannkraft against the axial stop (93) of the housing fixed guide (97) presses ,

Device according to one of claims 11 or 12, characterized in that at a pressure actuation of the rotary pushbutton (81) of the control cam (95) with its first stop surface (102) out of contact with the axial stop (93) of the housing fixed guide (97) , and that in the push operation of the rotary pushbutton (81) the control cam (95) is pressed with its second stop surface (103) against the control contour (99) of the housing-fixed slide guide (97).

Apparatus according to claim 11 to 13, characterized in that the axial stop (95) of the housing fixed guide (97) with its, with the control cam (95) cooperating contact surface throughout in a housing axis (G) perpendicular transverse plane (Q), and / or that the housing-fixed control contour (99) with its, with the control cam (95) cooperating contact surface (105) has an arbitrarily adapted circumferential course, depending on the rotational position of the rotary pushbutton (81) different sized Tastenhubwege (h ₃ ) available in particular, and that in particular the contact surface (105) of the housing-fixed control contour (99) is continuous in an inclined to the housing axis (G) inclined plane (S), or that the contact surface (105) of the housing-fixed control contour (99) graduated to each other in the axial direction or offset Partial surfaces has.