Abstract:
A sanitary outlet insert ( 1 ) which can be mounted on the water outlet of a sanitary outlet fitting, comprising a flow rate regulator ( 2 ) or a flow limiter that has an adjusting element ( 3 ) which regulates or limits the flow area in cooperation with a counter element ( 3 ′). The aim of the invention is to easily adapt said outlet insert to the prevailing on-site water pressure and/or to the corresponding application in a simple manner. According to the invention, this is achieved in that the flow area of the flow rate regulator ( 2 ) or the flow limiter can be preselected or varied by an axial change of the relative position of the adjusting element ( 3 ) and the counter element ( 3 ′); in that additionally a handle is provided on the outlet end face ( 7 ) of the outlet insert ( 1 ), said handle being designed as a pushbutton; and in that an adjusting movement on the handle can be converted into a relative axial movement of the adjusting element ( 3 ) and the counter element ( 3 ′) by means of a pushbutton mechanism.

Description:
BACKGROUND 
       [0001]    The invention relates to a sanitary outlet insert, which can be mounted on the water outlet of a sanitary outlet fitting, having a flow rate regulator or flow limiter that has an adjusting element which regulates or limits the flow cross section of the flow rate regulator or flow limiter in interaction with a counterelement, wherein a handle is provided on the outlet end of the outlet insert for the purpose of changing the relative position of the adjusting element and the counterelement, said handle being designed as a pushbutton, and wherein an adjusting movement at the handle can be converted into a relative movement of the adjusting element and the counterelement by means of a pushbutton mechanism. 
         [0002]    Many standards already envisage limiting the quantity of water flowing out of an outlet fitting per unit time. Moreover, it may also be necessary to limit the flow line in order to ensure that the jet of water flowing out of the outlet fitting does not splash. Sanitary outlet inserts of the type mentioned at the outset which have a flow rate regulator or a flow limiter have therefore already been provided. 
         [0003]    However, since the manufacturers of outlet fittings do not know the water pressure at the site of installation, and since this water pressure depends on the type of installation, e.g. on the use of pressure-increasing “booster pumps” or on water tanks installed on the roof, it is often necessary to supply a number of spare jet regulators designed for different flow rates for the outlet fittings, which are generally supplied on a trans-regional basis, it being possible to use these regulators selectively, depending on the on-site water pressure. However, providing a number of spare jet regulators, of which ultimately only one will be used, is associated with a considerable outlay. 
         [0004]    Since many standards stipulate limiting the flow rate and since limiting the flow rate may also be necessary in order to ensure that the jet of water flowing out does not splash, omitting such jet regulators is not a solution either. 
         [0005]    The prior art already includes various outlet inserts that can be used in the water outlet of a sanitary outlet fitting and, in addition to a jet regulator and/or a screen attachment, comprise a flow rate regulator or a flow limiter, the function of which is to limit the flow rate or to regulate the flow rate to a maximum value depending on the pressure. Although it is possible to reduce water consumption effectively with the aid of such outlet inserts, rapid filling and a correspondingly high volume flow is desirable for certain applications, e.g. when filling a pot or a water bucket. 
         [0006]    FR 2 907 874 A has already disclosed a sanitary outlet insert of the type mentioned at the outset which can be mounted on the water outlet of a sanitary outlet fitting. In the housing interior of its housing, the previously known outlet insert has a rotatably mounted valve body, which has three intersecting channels opening at the circumference of the valve body. The previously known outlet insert has an annular pushbutton, which projects beyond the outlet end of the housing. In this arrangement, a manual pressure actuation of the pushbutton can be converted by means of a pushbutton mechanism into a stepwise turning movement of the valve body, such that the channel openings opening at the circumference of the valve body can be brought into overlap with an inflow-side inlet opening or with closed segments of the housing. Through the stepwise preselectability of the channel openings, which are oriented in the inflow or outflow direction, the flow cross section can be reduced in steps or completely shut off with the aid of the previously known outlet insert. However, regulation of the quantity of water flowing through per unit time to a maximum flow rate in a pressure-dependent manner is neither envisaged nor possible in the previously known outlet insert. 
         [0007]    WO 2009/079821 A has already disclosed a shutoff valve which can be inserted instead of a commercially available jet regulator into a sleeve-shaped outlet nozzle that can be mounted on the water outlet of a sanitary outlet fitting. The shutoff valve already known from WO 2009/079821 A has a pushbutton which projects beyond the outlet end of the shutoff valve and with the aid of which a pushrod guided in an axially movable manner in the interior of the housing of the shutoff valve can be moved counter to the force of a restoring spring. The pushrod is of two-part design and has an inner rod part and an outer rod part, which are screwed together by means of a screw thread in such a way that the axial length of the pushrod can be changed. A water accumulation ring designed as a flexible hollow body, which can be filled with water via a bypass channel by the water flowing through the shutoff valve, is held on the pushrod. By means of manual pressure actuation of the pushbutton, which projects on the outflow side, the previously known shutoff valve is moved into the open position thereof. In the open position, the water accumulation ring is increasingly filled as time progresses, until the amount of water in the water accumulation ring is such that the change in hydraulic forces triggers the actuating movement of the shutoff valve back into the closed position. The shutoff valve already known from WO 2009/079821 A is provided for public washrooms. In that context, the previously known shutoff valve offers not only the advantage that the pushbutton, which is situated in the outflowing stream of water, is thus continuously cleaned but also that the shutoff valve moves into its shutoff position automatically after a preselectable time interval. Here, the time interval specified for the open position of the shutoff valve can be preselected by changing the length of the pushrod. 
       SUMMARY 
       [0008]    It is the object to provide a sanitary outlet insert of the type mentioned at the outset in which the flow rate can be adapted easily to the on-site water pressure and/or to the respective application, and it should preferably also be possible to use the outlet insert in existing outlet fittings, in particular without the need to replace the outlet nozzle. 
         [0009]    In the case of the sanitary outlet insert of the type mentioned at the outset, the solution to this problem according to the invention consists, in particular, in the fact that the flow cross section of the flow rate regulator or flow limiter can be preselected or varied between a high flow rate and at least one flow rate that is reduced relative to the latter by an axial change of the relative position of the adjusting element and the counterelement, and that the outflow end of the outlet insert has a central through opening, through which the pushbutton passes. 
         [0010]    The outlet insert according to the invention can be inserted into the water outlet of a sanitary outlet fitting in order to enable the flow rate to be adapted to the on-site water pressure or to the application which is the occasion for the drawing operation. For this purpose, the outlet insert according to the invention has a flow rate regulator or flow limiter that has an adjusting element which regulates or limits the flow cross section of the flow rate regulator or flow limiter in interaction with a counterelement. In order to be able to preselect or vary the flow cross section of the flow rate regulator or flow limiter, which cross section determines the flow rate, by an axial change of the relative position of the adjusting element and the counterelement, a handle is provided on the outlet end of the outlet insert. In this arrangement, an adjusting movement at the handle is converted into an axial relative movement of the adjusting element and the counterelement. In order to be able to change or adapt the flow rate of the outlet insert according to the invention quickly and easily, this handle is designed as a pushbutton which passes through a central through opening provided at the outlet end of the outlet insert. In this arrangement, an adjusting movement at the handle can be converted into an axial relative movement of the adjusting element and the counterelement by means of an actuating or pushbutton mechanism. With the aid of this actuating or pushbutton mechanism, the flow rate of the outlet insert according to the invention can be switched from a setting with a defined flow rate to at least one setting with a flow rate that differs from the latter simply by exerting pressure on the handle designed as a pushbutton. Since the outlet insert according to the invention is designed as a sanitary insert unit, said unit can also be designed in such a way that the outlet insert can also be substituted retrospectively for a conventional jet regulator insert in the already existing outlet fittings without the need to replace the existing outlet nozzle as well. 
         [0011]    A preferred development according to the invention envisages that the pushbutton mechanism has a thruster sleeve, by means of which the relative position of the adjusting element and the counterelement can be changed and that the thruster sleeve has at least one sliding tooth with an oblique surface, which oblique surface interacts with a circumferential stepped set of teeth, such that a pressing movement applied to the pushbutton counter to a restoring force can be converted into an axial sliding/turning movement of the sliding tooth, which, during this process, slides into the next step of the stepped set of teeth. The pushbutton, the thruster sleeve with the at least one sliding tooth, which has an oblique surface, and the stepped set of teeth, which interacts with the oblique surface on the sliding tooth, thus form a pushbutton or actuating mechanism which corresponds to the actuating mechanism of a conventional retractable ballpoint pen. 
         [0012]    In order to be able to provide a plurality of pre-selectable flow cross sections or flow rates by means of the outlet insert according to the invention, it is advantageous if the stepped set of teeth is of two- or multi-step design. 
         [0013]    In this case, a simple and advantageous embodiment according to the invention envisages that, in one step of the two- or multi-step stepped set of teeth, the adjusting element is arranged outside an operative position provided in the region of the counterelement. If the adjusting element is within at least one operative position provided in the region of the counterelement, the adjusting element and the counterelement can interact in such a way that the flow rate of the outlet insert according to the invention can be regulated or limited. If, on the other hand, the adjusting element is arranged outside an operative position provided in the region of the counterelement, the adjusting element and the counterelement cannot interact, and it is thus possible to provide a setting with a flow rate that is higher than the above, for example. 
         [0014]    An actuating mechanism which saves space and can also be accommodated in the insert housing of the outlet insert according to the invention, and which can be produced with little outlay and embodied in a functionally reliable manner, envisages that the thruster sleeve is guided in a guide sleeve, which bears the circumferential stepped set of teeth at one end edge of the sleeve or on the inner circumference of the sleeve. 
         [0015]    A preferred embodiment according to the invention envisages that the outflow-side end wall of the insert unit has a grille, net or hole structure and that the guide sleeve is formed integrally or secured on the end wall. If the outflow-side end wall of the outlet insert has a grille, net or hole structure, the jet of water emerging from the outlet insert according to the invention can be shaped and formed into a homogeneous jet of water which does not splash, for example. 
         [0016]    To ensure that the thruster sleeve can be guided in an axially movable and, at the same time, rotatable manner and hence that a pressing movement on the pushbutton can be converted into an axial sliding/turning movement of the at least one sliding tooth projecting from the thruster sleeve, a preferred development according to the invention envisages that the thruster sleeve is guided in a guide sleeve, which bears the circumferential stepped set of teeth at one end edge of the sleeve or on the inner circumference of the sleeve. 
         [0017]    The restoring force, which also acts on the pushbutton, can be provided by embodying at least one individual component of the individual components provided in the actuating mechanism with spring-type elasticity and/or by means of an elastomeric restoring element. In addition or instead, it may be advantageous for the restoring force to be embodied as a restoring spring. 
         [0018]    A particularly space-saving and functionally reliable embodiment according to the invention envisages that the restoring spring passes through the thruster sleeve. 
         [0019]    Movement of the pushbutton of the outlet insert according to the invention in the axial direction by pressure actuation can be accomplished particularly well if the pushbutton is guided movably in the guide sleeve. 
         [0020]    In order to be able to shape the jet of water emerging from the outlet insert according to the invention in an effective manner into a homogeneous jet of water which does not splash and, if appropriate, is also gently effervescent, a preferred development according to the invention envisages that a jet regulator is arranged downstream of the flow rate regulator or the flow limiter. 
         [0021]    A particularly functionally reliable and fault-free embodiment according to the invention, which at the same time can also be embodied in a very space-saving manner, envisages that the flow rate regulator is arranged in the insert unit between the outflow-side jet regulator and an inflow-side screen attachment. 
         [0022]    To ensure that the restoring spring can apply its restoring force in an effective manner to the actuating mechanism within the outlet insert according to the invention, one embodiment according to the invention envisages that the restoring spring is supported on the thruster sleeve and/or on the screen attachment. 
         [0023]    If a jet regulator is provided in the outlet insert according to the invention, it can be designed as an unaerated jet regulator. However, in order to aerate the jet of water emerging from the outlet insert according to the invention and hence to be able to shape it into a gently effervescent jet of water, an embodiment in which the jet regulator is designed as an aerated jet regulator is preferred. 
         [0024]    In the case of an outlet insert of this kind comprising an aerated jet regulator, it is advantageous if the jet regulator has a jet divider which divides the inflowing water into a multiplicity of individual jets to be aerated. 
         [0025]    A particularly simple, compact and quiet embodiment according to the invention envisages that the jet divider is designed as a perforated plate. 
         [0026]    However, in order to be able to aerate the individual jets produced in the jet divider of the outlet insert according to the invention well and effectively, even at low water pressures, a development according to the invention is preferred in which the jet divider is designed as a diffuser, which has an annular wall with through openings, and in which a deflecting surface is formed on the annular wall, said deflecting surface deflecting the inflowing water to the through openings. 
         [0027]    In order to be able to draw the ambient air into the outlet insert according to the invention and mix it there with the individual jets produced by the jet divider, it is advantageous if the jet regulator has a jet regulator housing with a housing subregion which, between itself and the diffuser, bounds a through channel, if the through channel tapers at least in one or more regions in the direction of flow, and if the through openings open into the through channel. Since, in this embodiment, the through channel bounded between the housing and the diffuser tapers in the direction of flow, the individual jets produced in the diffuser are accelerated in such a way that, in accordance with Bernoulli&#39;s equation, a reduced pressure is generated on the outflow side of the through channel, causing the ambient air to be drawn into the jet regulator of the outlet insert according to the invention. 
         [0028]    In order to be able to produce the individual parts of the outlet insert according to the invention in as simple a manner as possible and in order to reduce the outlay associated with the production of the outlet insert according to the invention, it is advantageous if the jet regulator has a jet regulator housing with at least two releasably connectable housing parts. 
         [0029]    The jet of water emerging from the insert unit can be shaped particularly effectively into a jet of water which is homogeneous and does not splash if the jet regulator has a jet regulator housing, into the housing interior of which at least one inserted part having a hole, grille or net structure can be inserted, said inserted part acting as a jet shaping part. 
         [0030]    The adjusting movement exerted on the pushbutton can be transmitted particularly effectively to the adjusting element if the adjusting element is guided in such a way as to be axially adjustable. 
         [0031]    It can be advantageous if the pushbutton is produced from a transparent or semitransparent material in order to indicate the selected pressure level. 
         [0032]    In order to avoid unintentional incorrect actuations or unwanted interference with the outlet insert according to the invention, it may be advantageous if the pushbutton is provided in such a way in a set-back position on the outlet insert that the pushbutton can only be actuated with the aid of an actuating tool. 
         [0033]    Another embodiment according to the invention envisages that, to actuate the pushbutton mechanism, the pushbutton must preferably be pushed into the outlet insert, in particular beyond the plane formed by the outlet end of the outlet insert, e.g. by means of the tip of the fingernail. In this advantageous embodiment too, unintentional incorrect actuations of the outlet insert are avoided. Moreover, the recessed pressure point prevents the screen attachment supporting the pressure mechanism from being protected from overloading by the application of an impermissibly large adjusting force or an over-long adjustment travel. 
         [0034]    A preferred development according to the invention envisages that the flow rate regulator has a throttling body made of flexible material, which, between itself and at least one regulating profile provided on a circumferential wall, delimits at least one control gap, the passage cross section of which changes under the pressure of the water flowing through, and that the flow cross section of the flow rate regulator can be preselected or varied by an axial change of the relative position of the throttling body and the regulating profile. 
         [0035]    It can be expedient here if the adjusting element carries the throttling body or the at least one circumferential wall having a regulating profile. 
         [0036]    In order to be able also to preselect various flow rates, if required, it is expedient if the circumferential wall bearing the regulating profile bounds a flow cross section which tapers in or counter to the direction of flow, and/or if the regulating profile has flow grooves or molded flow recesses, which are oriented in the direction of flow and the clear flow cross section of which tapers or widens. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0037]    Developments according to the invention will emerge from the following description in conjunction with the claims and the drawing. The invention is described in greater detail below with reference to preferred illustrative embodiments. 
           [0038]    In the drawing: 
           [0039]      FIG. 1  shows an outlet insert, illustrated in a longitudinal section, which can be mounted in the water outlet of a sanitary outlet fitting and, between an inflow-side screen attachment and an outflow-side jet regulator, has a flow rate regulator, the flow rate of which can be preselected in steps at a handle designed as a pushbutton projecting beyond the outflow side of the outlet insert, 
           [0040]      FIG. 2  shows the outlet insert from  FIG. 1  in a different operating position from that in  FIG. 1 , 
           [0041]      FIG. 3  shows the outlet insert from  FIGS. 1 and 2  in an exploded illustration of individual components, 
           [0042]      FIG. 4  shows the outlet insert from  FIGS. 1 to 3  in a perspective partial longitudinal section, 
           [0043]      FIG. 5  shows an outlet insert shown in a longitudinal section, which is of comparable design to the outlet insert illustrated in  FIGS. 1 to 4 , wherein the outflow-side jet regulator belonging to this outlet insert here has a diffuser as a jet divider instead of a perforated plate, 
           [0044]      FIG. 6  shows the outlet insert from  FIG. 5  in a different operating position from that in  FIG. 5 , 
           [0045]      FIG. 7  shows the outlet insert from  FIGS. 5 and 6  in an exploded illustration of individual components, 
           [0046]      FIG. 8  shows an outlet insert of comparable configuration to that in  FIGS. 5 to 7 , which here has a flow limiter instead of a flow rate regulator, 
           [0047]      FIG. 9  shows the outlet insert from  FIG. 8 , likewise illustrated in a longitudinal section, in a different operating position from that in  FIG. 8 , 
           [0048]      FIG. 10  shows the outlet insert from  FIGS. 8 and 9  in an exploded illustration of individual components, 
           [0049]      FIG. 11  shows an outlet insert formed by an inflow-side screen attachment, an outflow-side jet regulator and an interposed flow rate regulator in a longitudinal section, wherein here preselection of the flow rate of the flow rate regulator is not accomplished through the ability to adjust the throttling body axially in its position relative to a regulating profile but, on the contrary, through the fact that the control core serving as an adjusting element, which carries the circumferential wall with the regulating profile, can be adjusted axially between two operating positions, and wherein here the control core is illustrated in an operating position in which it is deactivated relative to the throttling body, 
           [0050]      FIG. 12  shows the outlet insert from  FIG. 11 , likewise illustrated in a longitudinal section, in a different operating position from that in  FIG. 11 , in which the control core can interact with the throttling body, 
           [0051]      FIG. 13  shows the outlet insert from  FIGS. 11 and 12  in an exploded illustration of individual components, 
           [0052]      FIGS. 14 to 18  show an outlet insert comparable to that in  FIGS. 1 to 4  in various longitudinal sections, in which outlet insert the flow rate can be adjusted between four different levels, wherein  FIGS. 14 to 18  show the outlet insert in a sequence during an actuating process, 
           [0053]      FIG. 19  shows the outlet insert from  FIGS. 14 to 18  in an exploded illustration of individual components, 
           [0054]      FIG. 20  shows a longitudinal section of an outlet insert that can be inserted into an outlet nozzle and is likewise designed as an insertable cartridge, which outlet insert has, between the inflow-side screen attachment and the outflow-side jet regulator, an interposed flow rate regulator, in which the control core, which interacts with the flexible throttling body, has multiple, in this case two, control core subregions, for example, which have different effective diameters and/or differently acting regulating profiles, such that the flow rate regulator can be adjusted between a corresponding number of operating positions with different flow rates, 
           [0055]      FIG. 21  shows the outlet insert from  FIG. 20 , likewise shown in a longitudinal section, in the operating position that differs from  FIG. 20 , and 
           [0056]      FIG. 22  shows the outlet insert from  FIGS. 20 and 21  in an exploded illustration of individual components. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0057]    Various embodiments  1 ,  5 ,  8 ,  11 ,  14  and  50  of a sanitary outlet insert are illustrated in  FIGS. 1 to 22 . The outlet inserts  1 ,  5 ,  8 ,  11 ,  14 ,  50  can be inserted into an outlet nozzle (not shown here), which can be mounted on the water outlet of a sanitary outlet fitting (likewise not shown). While the outlet inserts  1 ,  5 ,  11 ,  14  and  50  have a flow rate regulator  2 , a flow limiter  2 ′ is provided in the outlet insert  8  shown in  FIGS. 8 to 10 . The flow rate regulators  2  and the flow limiter  2 ′ have an adjusting element  3 ,  4 ,  6  or  38 , which interacts with a counterelement  3 ′,  4 ′,  6 ′ or  38 ′. While it is the function of the flow rate regulators  2  to regulate the flow cross section to a maximum flow rate (volume flowing through per unit time) independent of the water pressure, the flow limiter  2 ′ is intended merely to limit the flow cross section and reduce the flow rate accordingly. 
         [0058]    It will be apparent from  FIGS. 1 to 22  that a handle is provided on the outlet end  7  of the outlet insert  1 ,  5 ,  8 ,  11 ,  14 . Here, an adjusting movement at the handle is converted into an axial relative movement of the adjusting element  3 ,  4 ,  6 ,  38  and the counterelement  3 ′,  4 ′,  6 ′,  38 ′. The handle is designed as a pushbutton  9 , which projects beyond the outlet end  7  of the outlet insert  1 ,  5 ,  8 ,  11 ,  14 ,  50  and can be moved axially on the outlet insert  1 ,  5 ,  8 ,  11 ,  14 ,  50  in a direction toward the latter, against the restoring force of a restoring spring  44 , by exerting pressure. 
         [0059]    The relative position of the adjusting element  3 ,  4 ,  6 ,  38  and the counterelement  3 ′,  4 ′,  6 ′,  38 ′ can be adjusted by means of a thruster sleeve  10 . This thruster sleeve  10 , which is part of a pushbutton mechanism, has sliding teeth  12 , which are spaced apart around the outer circumference of the thruster sleeve  10 . The axial end face of the sliding teeth  12  which faces the pushbutton  9  is in each case designed as an oblique surface  13 , which interacts with a corresponding counterbevel  15  on a stepped set of teeth  16 . This stepped set of teeth  16  is provided on the inner circumference (cf.  FIGS. 13 and 21 ) or on the axial end wall (cf.  FIGS. 1 to 10 ,  14  to  19 ) of a guide sleeve  17 , in which the thruster sleeve  10  is guided in an axially movable manner. The oblique surfaces  13  of the sliding teeth  12  can slide along the counterbevels  15  of the guide sleeve  17  in such a way that a pressing movement applied to the pushbutton  9  counter to the restoring force can be converted into an axial sliding/turning movement of the sliding teeth  12 , which slide into the next step of the stepped set of teeth  16  during this process. 
         [0060]    From  FIGS. 1 to 22  and, in particular, from the time sequence in  FIGS. 14 to 18 , it can be seen that the pushbutton  9  has a sleeve-shaped front end region, which bears a set of teeth  18  running around in a crown shape. When pressure is exerted on the sleeve-shaped front end region of the pushbutton  9 , which end region is guided between the inner circumference of the guide sleeve  17  and the outer circumference of the thruster sleeve  10 , the crown-shaped set of teeth  18  thereof is pushed forward toward the sliding teeth  12  of the thruster sleeve  10  until said teeth lift off from the counterbevels  15  on the guide sleeve  17 . In this case, the crown-shaped set of teeth  18  of the pushbutton  9  is offset in such a way relative to the counterbevels  15  on the guide sleeve  17  and to the sliding teeth  12  on the thruster sleeve  10  that, after lifting off from the stepped set of teeth  16 , the sliding teeth  12  simultaneously also perform a turning movement, which may be reinforced by the restoring element if required, and after returning the pushbutton  9  to the initial position, can engage in the next step of the stepped set of teeth  16 . 
         [0061]    The stepped set of teeth  16  is of two- or multi-step design. In this case, each stepped set of teeth  16  has a step sequence which is repeated in the circumferential direction in such a way that the sliding teeth  12 , which rotate further in one direction with each actuating operation, move further up the step sequence step by step and, after reaching the highest step, fall back into the initial step. 
         [0062]    Here, the outflow-side end wall  19  of the outflow inserts  1 ,  5 ,  8 ,  11 ,  14 ,  50 , which is provided at the outflow end  7 , is designed as a hole structure, which has through flow holes  20  similar to honeycomb cells, for example. The outflow-side end wall  19  has a central through opening  43 , through which the pushbutton  9  passes. The through opening  43  provided on the end wall  19  is surrounded by the guide sleeve  17 , which can be formed integrally (cf.  FIGS. 7 and 10 ) or secured releasably (cf.  FIGS. 3 ,  4 ,  19 ) on the jet regulator or diffuser (cf.  FIGS. 20 and 21 ) or on the end wall  19 . 
         [0063]    In  FIGS. 1 to 22 , it can be seen that a screen attachment  21 , in particular a conical screen attachment  21 , the function of which is to filter out dirt particles carried by the water, is arranged upstream of the flow rate regulator  2  or the flow limiter  2 ′. Arranged downstream of the flow rate regulator  2  or the flow limiter  2 ′ is a jet regulator  22 , the function of which is to shape the outflowing water into a homogeneous jet of water which does not splash. Here, the jet regulator  22  of the outlet inserts  1 ,  5 ,  8 ,  11 ,  14 ,  50  is designed as an aerated jet regulator and has a jet divider, which divides the inflowing water into a multiplicity of individual jets which are to be aerated. While the jet divider of the outlet inserts  1 ,  14  is designed as a perforated plate  23 , the jet divider of outlet inserts  5 ,  8 ,  11 ,  50  is designed as a diffuser  24 . The diffuser  24  has an annular wall  25 , which has through openings  26  uniformly spaced apart in the circumferential direction. A deflecting surface  27  is formed integrally on the annular wall  25  and deflects the inflowing water to the through openings  26 . The aeration openings  29  provided in the jet regulator housing  28  of the outlet inserts  1 ,  5 ,  8 ,  11 ,  14 ,  50  open into a through channel  30  running round in a ring shape, which is provided between the diffuser  24  and the adjacent housing subregion of the jet regulator housing  28 . This through channel  30  tapers in the direction of flow in such a way that the individual jets produced in the diffuser  24  undergo an acceleration, which produces a reduced pressure in that subregion of the housing interior of the jet regulator housing  28  which follows the through channel  30 , causing the ambient air required to aerate the individual jets to be drawn into the interior of the housing. Since the individual jets produced by the perforated plate  23  produce a comparable reduced pressure, the aeration openings  29  through which the ambient air can enter the interior of the housing are provided in the housing wall of the jet regulator housing  28 . The end wall  19 , which in this case has a hole structure, simultaneously provides the jet regulator  22  with a flow straightener, the function of which is to shape the individual jets aerated in the interior of the housing into a homogeneous and gently effervescent overall jet. 
         [0064]    As will be clear from the Figures, the flow rate regulator  2  or the flow limiter  2 ′ is integrated as a component part into the jet regulator housing  28  of the outlet inserts  1 ,  5 ,  8 ,  11 ,  14  and  50 . 
         [0065]    It goes without saying that it is also possible, instead of the jet aerator illustrated here, for a laminar or unaerated jet regulator, a flow straightener or some other jet shaping device to be arranged downstream of the flow rate regulator  2  or the flow limiter  2 ′. 
         [0066]    The flow rate regulators  2  provided in the outlet inserts  1 ,  5 ,  11 ,  14  and  50  have an annular throttling body  31  made of flexible material. Between itself and a regulating profile  32  provided on a circumferential wall, the throttling body  31  delimits a control gap  33 . Since, with increasing pressure, the throttling body  31  is increasingly deformed and pressed into the regulating profile  32 , the passage cross section of the control gap  33  is modified by the pressure of the water flowing through. While the regulating profile of the outlet inserts shown in  FIGS. 1 ,  5  and  11  has an approximately constant cross section, such that, in these outlet inserts, the throttling body can be switched into only two operating positions relative to the regulating profile, either in or out of use,  FIG. 14  shows by way of example an embodiment in which the circumferential wall bearing the regulating profile  32  tapers in or counter to the direction of flow and/or in which—as in FIG.  14 —the grooves or similar molded recesses  34  forming the regulating profile  32 , said grooves or recesses being oriented in the direction of flow, widen in or counter to the direction of flow, making it possible, through axial adjustment of the relative position of the adjusting element  3 ,  4  and the counterelement  3 ′,  4 ′, to vary the flow cross section of the flow rate regulator  2  in stages if required. Whereas, in outlet inserts  1 ,  5 ,  14 , the adjusting element  3 ,  4  carries the flexible throttling body  31 , the adjusting element  6  in outlet inserts  11 ,  50  bears the regulating profile  32  on its outer circumferential wall, and the regulating profile  32  is surrounded by the throttling body  31 , which is secured axially in the flow rate regulator  2 . 
         [0067]    The adjusting element  3  of outlet inserts  1  and  14 , which carries the throttling body  31 , is designed in the form of a spoked wheel, wherein guide webs  35  of the flow rate regulator housing  36  pass through the spoke openings  37  in such a way that the adjusting element  3  is guided in the outlet insert  1 ,  14  in a manner which prevents relative rotation but allows axial movement. 
         [0068]    The outlet insert  1  shown in  FIGS. 1 to 4  can be adjusted between a “low” setting, shown in  FIG. 1 , with a reduced flow rate and a “boost” or “high” setting, shown in  FIG. 2 , with a higher flow rate, in which the adjusting element  3  carrying the throttling body  31  is arranged outside an operative position provided in the region of the counterelement  3 ′. 
         [0069]    Whereas outlet insert  1  has a perforated plate  23  as a jet divider in its jet regulator  22 , outlet insert  5 , which is likewise of two-step design, has a diffuser  24  as a jet divider, which produces a greatly reduced pressure even at low water pressures in order to draw the ambient air required to aerate the water into the interior of the housing of the jet regulator  5 . It will be clear from  FIG. 7  that, in outlet insert  5 , the front end region of the thruster sleeve  10 , said front end region facing the flow rate regulator  2 , is simultaneously designed as the adjusting element  4  carrying the throttling body  31 . 
         [0070]    The outlet insert  8  corresponds to the outlet insert  5  with the exception of the absence of a throttling body in the outlet insert  8 . In the case of the outlet insert  8 , the adjusting element  38  itself therefore acts as the flow limiter  2 ′, which narrows the flow cross section to the jet regulator in the “low” setting shown in  FIG. 9 , while this flow cross section is held open relative thereto in the “boost” or “high” setting shown in  FIG. 8 . 
         [0071]    In the case of the two-step outlet insert  11 , the adjusting element  6  bearing the regulating profile  32  can be switched between the “boost” or “high” setting shown in  FIG. 11  and the “low” setting shown in  FIG. 12  in such a way, with the adjusting element  6  being arranged outside an operative position provided in the region of the counterelement  6 ′ in the “boost” setting. 
         [0072]    The outlet inserts  14 ,  50  are of multi-step design. From the stepped set of teeth  16 , it can be seen that the outlet insert  14  has four steps, which are distinguished from one another by different flow rates. The outlet insert  14  thus allows switching between the operating positions in the manner of a revolver. Since the outlet insert  14  offers a plurality of operating positions, which can be preselected if required, the outlet insert  14  can also be used as a “universal” jet regulator, which can be adapted to any water pressure in the water systems of the various regions and markets simply by pressure operation. 
         [0073]    In the case of the outlet insert  50  shown in  FIGS. 20 to 22 , the regulating core, which is designed as an adjusting element  6  and can be adjusted axially by means of the pushbutton mechanism and can be fixed in the selected operating position, has two regulating core subregions, which bear regulating profiles  32  with different effects and/or—as in the present case—which have different effective diameters. Since the flow rate regulator  2  of the outlet insert  50  has two regulating core subregions which differ in this way and which each interact, in one of the operating positions, with the throttling body  31  acting as a counterelement  6 ′, one of the two flow rates available can be selected at the pushbutton  9 . 
         [0074]    In  FIGS. 1 to 19 , it can be seen that the jet regulator housing  28  has a recess on the inflow side thereof, into which the housing  36  of the flow rate regulator  2  or the housing  40  of the flow limiter  2 ′ can be inserted by means of a housing part  39 , here designed in the manner of a flange, in a way which allows it to be releasably connected and, in particular, releasably locked. The screen attachment  21 , which has a smaller outside diameter than housing subregion  39 , is, for its part, held on the inflow side of the flow rate regulator  2  or the flow limiter  2 ′ in a way which allows it to be releasably connected and, in particular, releasably locked. 
         [0075]    As will be apparent from  FIGS. 20 and 21 , in the case of outlet insert  50  the screen attachment  21  and the housing subregion associated with the flow rate regulator  2  are connected integrally to one another to give a single component  52 , which component  52  can be locked releasably in the jet regulator housing  28  in such a way that the jet divider, here designed as a diffuser  24 , is also simultaneously secured in the interior of the housing. As can be seen in  FIGS. 20 to 22 , a support element  51  in the form of an annular washer, on the circumferential edge region of which, which projects on the inside, the flexible throttling body  31  rests, is arranged between component  52  and the inflow-side end edge of the diffuser  24 . 
         [0076]    In the case of the outlet inserts  1 ,  5 ,  8 ,  11 ,  14 ,  50  illustrated here, the flow rate can be switched from a setting with a lower flow rate to at least one setting with a higher flow rate and vice versa, simply by exerting pressure on the handle designed as a pushbutton  9 , in accordance with the revolver principle. In this way, the outlet inserts  1 ,  5 ,  8 ,  11 ,  14 ,  50  can be adapted easily and with little effort to the on-site water pressure and/or to the respective application.