Valve switching device, valve and sanitary shower

Abstract

A valve switching device comprising a valve closing element (1) movable along a switching path (SW) between an initial position (AP) and an end position, a user-operated control element (2) with which the valve closing element is actuated, and a spring-elastic return element that applies a return force (RF) to the valve closing element along the switching path in the direction of the initial position, as well as a valve equipped therewith and a sanitary shower with such a valve. According to the invention, the spring-elastic return element is a leaf spring element (2). The leaf spring element is formed integrally with at least one part (1a) of the valve closing element (1) adjacent to the leaf spring element.Additionally or alternatively, the restoring force along the switching path exhibits a multi-stage force-displacement characteristic, with a first force-displacement curve in a first sub-section of the switching path and a second force-displacement curve, different from the first, in a second sub-section of the switching path. Applications include, for example, sanitary hand showers.

Description

[0001] The invention relates to a valve switching device according to the preamble of claim 1, also referred to herein as a generic valve switching device, as well as to a valve equipped therewith and a sanitary shower with such a valve.

[0002] The generic valve switching device includes a valve closing element movable along a switching path between an initial position and an end position, a user-operated control element with which the valve closing element is coupled for actuation, and a spring-elastic return element that applies a return force to the valve closing element along the switching path in the direction of the initial position.

[0003] The operating element allows the user to move the valve closing element, typically from one instantaneous valve position to another, thereby moving the valve switching device into different switching positions in which the equipped valve performs different associated valve functions. The spring force of the spring-elastic return element holds the valve closing element in its initial position, which usually corresponds to an associated valve position, or biases it towards its initial position.

[0004] The movement path of the valve closing element, referred to here as the switching path, between the initial position and an end position of the switching path, represents, depending on the design of the valve switching device, either the entire movement path of the valve closing element from the valve position corresponding to the initial position to another valve position, or only a part of this movement path between the initial position and the other valve position. In other words, the movement of the valve closing element along the switching path can be preceded, followed, and / or superimposed by a further movement of the same element.

[0005] Valve switching devices of this and similar types, and valves equipped with them, are known in a wide variety of designs. In sanitary engineering, for example, they are used...

[0006] These valves are used in fluid outlet fittings, and especially water outlet fittings such as taps, mixer taps, and shower heads in bathrooms, showers, and kitchens. They typically serve to allow the user to control the supplied fluid, for example, by using a diverter valve to variably distribute the supplied fluid to multiple downstream fluid channels, by using a shut-off valve to selectively close or open a downstream fluid channel, by using a flow control function to variably regulate the amount of dispensed fluid (e.g., continuously), and by using a mixing function to variably regulate the mixing ratio of two or more supplied fluids, such as colder and warmer water (e.g., continuously). These valve switching devices are also used outside of plumbing to control the flow of water or other fluids in a desired manner.

[0007] Patent EP 2 213 918 B1 discloses a generic valve switching device for a sanitary shut-off or diverter valve, wherein the spring-elastic return element is formed by a helical compression spring which is supported on one side by the disc-shaped valve closing element and on the other side by a stationary valve body wall and presses the valve closing element against a valve seat formed by a further valve body wall. The valve closing element is axially and rotationally movable, and the valve switching device has a switching mechanism by which the valve closing element can be cyclically switched between several valve positions, which correspond to different stable rotational positions of the valve closing element relative to the stationary valve seat.

[0008] German patent application EP 2 865 447 A1 discloses a generic valve switching device and a valve equipped therewith in the form of a hand shower diverter unit for a sanitary or kitchen hand shower. In this valve switching device, the spring-elastic return element is formed by an annular diaphragm element, which is integrally formed with the valve closing element made of an elastomeric material and is held at its periphery against a stationary valve body part. The valve closing element is arranged to be axially movable between two valve positions, in which it rests against one of two opposing valve seats, with the diaphragm element being inverted by this axial movement of the valve closing element.

[0009] The invention is based on the technical problem of providing a valve switching device of the type mentioned above, which offers further advantages over the prior art mentioned above, in particular with regard to low manufacturing costs and / or improved switching functionality and / or optimized haptic feedback for the user, as well as a valve equipped with such a device and a sanitary shower with such a valve.

[0010] The invention solves this problem by providing a valve switching device with the features of claim 1, a valve with the features of claim 14, and a sanitary shower head with the features of claim 15. Advantageous embodiments of the invention are specified in the dependent claims, the wording of which is hereby incorporated by reference into the description. This includes, in particular, all embodiments of the invention resulting from the combinations of features defined by the cross-references in the dependent claims.

[0011] According to the invention, the spring-loaded return element of the valve switching device is a leaf spring element. The use of a leaf spring element for the spring-loaded return element, which effects or at least assists the return of the valve closing element to its initial position, offers specific advantages for the valve switching device in this context. Leaf spring elements are also relatively simple to manufacture and can be produced in a wide variety of versions if required.

[0012] According to a first aspect of the invention, the leaf spring element is formed integrally with at least one part of the valve closing element adjacent to the leaf spring element. This measure minimizes the manufacturing effort for the valve switching device. In this case, the leaf spring element is formed integrally with at least the part of the valve closing element adjacent to it, preferably integrally with the entire valve closing element, and consequently does not need to be manufactured and assembled as a separate component independent of the valve closing element.

[0013] In alternative designs, the leaf spring element can be manufactured separately and mounted on the valve closing body, or the leaf spring element can be connected not to the valve closing body but to a wall located near the valve closing body, e.g., formed integrally with it or manufactured separately and mounted to it, and thus held stationary on this wall, i.e., not moving with the valve closing body. In this case, the valve closing body can be rotatably mounted on the leaf spring element if required.

[0014] In further alternative embodiments, the leaf spring element can be connected to the user-operated control element, in particular formed integrally with it, so that the spring action of the leaf spring element is provided directly by the control element, which in this case is movably designed. Such a movable control element can, for example, be designed as a push button. In this case, too, it can be provided, if required, that the valve closing element is rotatably mounted on the leaf spring element.

[0015] According to a second aspect of the invention, which is implemented in corresponding embodiments of the invention additionally or alternatively to the first-mentioned aspect, the restoring force of the leaf spring element along the switching path of the valve closing element exhibits a multi-stage force-displacement characteristic. This force-displacement characteristic comprises at least a first force-displacement profile in a first sub-region of the switching path and a second force-displacement profile, different from the first, in a second sub-region of the switching path.

[0016] This measure enables the provision of multi-stage switching functionality, i.e., multi-stage switching behavior, of the valve switching device and differentiated, graduated haptic feedback for the user. The restoring force of the leaf spring element, as a function of the valve closing element's travel, differs in the second part of the travel from that in the first part due to the different force-displacement curves. This can be used, in particular, to assign different valve functionalities to the two travel segments and / or to provide the user with differentiated haptic feedback as to whether the valve closing element is currently in the first or second travel segment during actuation.This is because the user must overcome the restoring force of the leaf spring element to move the valve closing element along its switching path, and therefore feels the restoring force acting at any given moment as haptic feedback. This can, for example, make it easier for the user to decide whether to continue moving the valve closing element after moving it along the first or second switching path segment, or whether to hold it in the position reached at the end of the respective switching path segment, or to allow it to return to its original position by releasing the control element.

[0017] In certain designs, the force-displacement characteristic for the restoring force of the leaf spring element is two-stage, meaning the switching travel of the valve closing element is divided into two adjacent switching travel segments. In other designs, the force-displacement characteristic has three or more stages, meaning that in addition to the first and second segments, the switching travel comprises one or more further segments in which the force-displacement curve of the restoring force of the leaf spring element differs from the force-displacement curve of the adjacent switching travel segment(s), depending on the switching travel of the valve closing element. The force-displacement curves can be freely defined as desired, i.e., arbitrarily, to suit the application, for which the leaf spring element is designed accordingly.In particular, these can be essentially linear force-displacement curves, as are typical for leaf spring elements and other spring elements in their linear spring travel range, whereby the linear force-displacement curves differ in their characteristic slope, i.e., in how much the restoring force changes for a given spring travel.

[0018] In a further development of the invention, the leaf spring element is designed as a compression spring element. This represents a variant implementation that proves advantageous for many applications of the valve switching device with regard to manufacturing effort and functionality. Alternatively, the leaf spring element can also be designed, for example, as a tension spring element.

[0019] In a further development of the invention, the leaf spring element is formed in one piece with at least the part of the valve closing element adjacent to the leaf spring element. This enables relatively simple manufacturing of the leaf spring element together with the valve closing element or a part thereof, e.g., from plastic, which can in particular be a deformable but sufficiently rigid plastic material so that the leaf spring element fulfills its required leaf spring function, whereby it is spring-elastic and deformable or bendable. Alternatively, the leaf spring element can be manufactured in one piece from a metal material together with at least an adjacent part of the valve closing element, or as a separate component made of a plastic or metal material, separate from the valve closing element.

[0020] In a further development of the invention, the switching path is designed as a translational switching path. This means that the valve closing element moves or shifts along the switching path in a straight line. Depending on requirements and application, this translational movement can be the sole component of the valve closing element's movement, or it can be superimposed with another component, such as a rotary movement. In alternative embodiments, the switching path can, for example, be designed as a rotary path along which the valve closing element rotates. Alternatively, the switching path can be a deflection path of the valve closing element along a curved line.

[0021] In a further development of the invention, the first force-displacement curve and the second force-displacement curve are essentially linear curves that connect at a junction. Such linear force-displacement curves are advantageous for valve switching devices in many applications and can be implemented relatively easily using the leaf spring element. By connecting the two linear force-displacement curves at the junction, the user can receive haptic feedback, via a corresponding change in the restoring force of the leaf spring element at the junction, indicating that the valve closing element is at the transition between the two adjacent switching travel segments. In this case, the two linear force-displacement curves differ in the slope of their characteristic curves; that is, in one case, the restoring force increases more sharply with increasing travel of the valve closing element than in the other case.In alternative configurations, at least one of the two force-displacement curves may have a non-linear profile, or the first and second force-displacement curves may not be directly connected but separated by one or more intermediate force-displacement curves. The latter necessitates the presence of one or more additional associated switching path sub-sections besides the first and second switching path sub-sections.

[0022] In a further development of the invention, the valve closing element is rotatably arranged and axially movable with an axial movement component that forms the switching path. This embodiment is suitable, for example, for valve switching devices that have several valve positions in which the valve closing element is located in corresponding different rotational positions, e.g., in contact with a valve seat. The rotational movement component moves the valve closing element from one rotational position to another, while the axial movement component forms the aforementioned switching path of the valve closing element and can, for example, be used to lift the valve closing element axially from a valve seat, then rotate it, and return it to the valve seat. Likewise, the axial movement component can be used within a conventional switching device for the cyclical switching of the valve closing element in a combined axial and rotational movement.In alternative designs, the valve closing element is, for example, purely axially movable or purely rotatable.

[0023] In a further development of the invention, the leaf spring element is rotationally fixed to the valve closing element and has a pivot bearing component. This embodiment is particularly suitable for cases where the movement of the valve closing element consists of a rotary motion or at least includes a rotary motion, e.g., combined with an axial motion. Due to the rotationally fixed coupling, the leaf spring element rotates together with the valve closing element, and the pivot bearing component of the leaf spring element can serve to rotate the assembly of valve closing element and leaf spring element. In alternative embodiments with a rotatable valve closing element, the leaf spring element is arranged in a stationary position, e.g., on a wall of a valve body, wherein the valve closing element is rotatable relative to the leaf spring element.

[0024] In one embodiment of the invention, the valve switching device has a wall located at a distance from the valve closing element, on which a counter-bearing element is formed that rotates together with the rotary bearing element. In this embodiment, the rotary bearing element and the counter-bearing element form a rotary bearing for the valve closing element and the leaf spring element which is non-rotatably connected to it. The wall provided with the counter-bearing element can, for example, be a wall of a valve body in or on which the valve closing element and the leaf spring element are arranged.

[0025] In a further development of the invention, the valve closing element has a disc-shaped closing part, from one of whose main faces an actuating pin projects, which is coupled to the user-operated control element. This represents a favorable implementation of the valve closing element for many applications. The disc-shaped closing part of the valve closing element can, for example, be used to interact with a corresponding annular or disc-shaped valve seat to provide the desired valve functionality. The user can actuate the valve closing element by appropriately actuating the control element via the actuating pin. In alternative embodiments, the valve closing element can be shaped differently, e.g., as a piston-shaped valve closing element or as a disc-shaped body that has a different actuating interface instead of the actuating pin, e.g.,a magnetic element for magnetic actuation of the valve closing body.

[0026] In one embodiment of the invention, the leaf spring element is connected to the other main side of the disc-shaped locking part. This represents an advantageous arrangement of the leaf spring element for many applications. The actuating pin is located on one side of the disc-shaped locking part of the valve body, and the leaf spring element on the other side. The actuating pin and the leaf spring element can therefore be designed independently of each other to fulfill their respective required functions, without the actuating pin having to be considered in the design of the leaf spring element, and vice versa. In alternative embodiments, the leaf spring element and the actuating pin can be arranged on the same side of the disc-shaped locking part if this is advantageous for the respective applications.It is also possible that the leaf spring element is arranged on or connected to the actuating pin.

[0027] In one embodiment of the invention, the actuating pin and / or the leaf spring element are arranged concentrically with respect to a longitudinal axis of the valve closing element, which also serves as the axis of rotation for the valve closing element. This represents an advantageous arrangement of the actuating pin or the leaf spring element for many applications where rotational mobility of the valve closing element is required, whereby the valve closing element is rotatable about its own longitudinal axis. This longitudinal axis typically runs perpendicular to the plane of the disk-shaped closing part of the valve closing element. The concentric position of the actuating pin and / or the leaf spring element offers advantages with regard to manufacturing and assembly, as well as with regard to the function to be performed. In alternative embodiments, the actuating pin and / or the leaf spring element can be arranged off-center with respect to the axis of rotation of the valve closing element if this offers advantages for the respective applications.

[0028] In one embodiment of the invention, the pivot bearing part of the leaf spring element is arranged in an end region of the leaf spring element facing away from the disc-shaped closing part of the valve closing body. This allows the assembly of leaf spring element and valve closing body to be rotatably mounted on the side of the leaf spring element facing away from the disc-shaped closing part of the valve closing body, for example, on the aforementioned wall of a valve body or a valve housing body. Alternatively, the leaf spring element can, for example, have a pivot bearing part on a side facing the disc-shaped closing part of the valve closing body.

[0029] In one embodiment of the invention, the valve switching device comprises a switching mechanism for cyclically and rotaryly switching the valve closing element between several valve positions, wherein the actuating pin is coupled to the switching mechanism. This is a known configuration of the valve switching device with a switching mechanism, which also offers advantages for the present valve switching device in applications where the valve closing element is to be cyclically switched between several valve positions, corresponding to different rotational positions of the valve closing element, by rotation. In this case, the actuating pin can be used to couple the valve closing element to the switching mechanism.In alternative designs, the valve closing element is connected to the switching device via a different conventional coupling means instead of via the actuating pin, or the valve switching device is implemented without a switching device, particularly in applications where the valve closing element is not switched cyclically by rotation, but is moved between its different valve positions in another way, e.g. by a back and forth movement.

[0030] In a further development of the invention, the leaf spring element includes a leaf spring ring, which has a closed or open ring shape and whose ring plane is parallel to the switching path. This represents an optimal design of the leaf spring element for many applications of the invention. The leaf spring element consists solely of the leaf spring ring or, alternatively, includes one or more additional components if these are otherwise useful. By arranging the leaf spring ring with its ring plane parallel to the switching path, the leaf spring ring can optimally fulfill its spring action, which consists of acting on the valve closing element along the switching path in the direction of its initial position with its spring or restoring force. In alternative embodiments, the leaf spring ring is arranged in a different position, or the leaf spring element is designed differently, e.g., in a spring plate shape instead of a spring ring shape.

[0031] In one embodiment of the invention, the leaf spring ring has a circular or oval base shape, the extent of which parallel to the switching path is no greater than that perpendicular to the switching path. The leaf spring ring thus shaped provides a restoring force characteristic for the valve closing element that is advantageous for many applications of the invention. Given a specific material selection and dimensioning of the leaf spring ring, the restoring force exerted on the valve closing element can be adjusted or selected to be softer and more sensitive the greater its extent perpendicular to the switching path is compared to its extent parallel to the switching path. In alternative embodiments, a different base shape can be chosen for the leaf spring ring if this proves advantageous, e.g., a polygonal ring shape.

[0032] In one embodiment of the invention, the leaf spring ring is connected to the valve closing element via a central spacer pin at its closing element side. This allows the leaf spring ring to be positioned so that, in its initial position, one side of it maintains a distance from the valve closing element that can be selected by the length of the spacer pin. This allows the leaf spring ring to initially yield freely elastically during actuation of the valve closing element along its switching path and, after a certain switching path length, to come into contact with the valve closing element. This alters the bending behavior of the leaf spring ring and thus the force-displacement characteristic of the restoring force exerted by the leaf spring ring on the valve closing element. This is particularly useful for implementing the multi-stage force-displacement characteristic of the restoring force of the leaf spring element.In alternative designs, the leaf spring ring is connected to the valve closing body in a different way, i.e. without such a central spacer pin, e.g. directly adjacent to a disc-shaped closing part of the valve closing body.

[0033] In one embodiment of the invention, the leaf spring ring has a meandering structure in a portion facing away from the valve closing element, with a distance from the valve closing element and / or from the portion facing the closing element that meanders parallel to the switching path. This design of the leaf spring ring proves to be very advantageous for providing an optimal single- or multi-stage force-displacement characteristic for the restoring force exerted by the leaf spring element on the valve closing element. The meandering structure provides the leaf spring ring with favorable, spring-elastic compliance and, if required, facilitates the provision of a multi-stage force-displacement characteristic for the restoring spring force with two or more different force-displacement profiles.In alternative embodiments, the part of the leaf spring ring facing the closing element, rather than the part facing away from the closing element, has such a meandering structure, or the leaf spring ring is formed without such a meandering structure, e.g. as a purely circular or elliptical, oval spring ring.

[0034] The valve according to the invention comprises a valve body having a valve chamber and a valve seat adjacent to the valve chamber, and the valve switching device according to the invention. The valve closing element of the valve switching device is arranged in the valve chamber and is movably held on the valve body from at least a first valve position to a second valve position, and interacts with the valve seat to control the fluid flow. The initial position of the valve closing element is the first valve position, and the switching path forms at least part of the movement of the valve closing element from the first to the second valve position.Through these measures, the valve according to the invention offers a correspondingly advantageous switching behavior for the user in order to set the desired valve function, such as selectively closing and opening a fluid path and / or selectively switching the fluid flow from at least one fluid path to at least one other fluid path and / or variably mixing two or more fluids.

[0035] The sanitary shower according to the invention comprises a shower body with a fluid inlet area, which includes at least one fluid inlet for supplying a shower fluid, a fluid outlet area, which includes at least one fluid outlet for dispensing the shower fluid, and a fluid channel structure for guiding the shower fluid from the fluid inlet area to the fluid outlet area, and the valve according to the invention, which can be operated by the user to control the dispensing of the shower fluid through the sanitary shower in the desired manner. The valve can preferably be arranged in the shower body.

[0036] Equipping the shower head with the valve according to the invention allows the user to optimally control the dispensing of the shower fluid. The shower head in question can be, in particular, a hand shower in a shower room, at a bathtub, or at a kitchen sink; alternatively, it can be any other type of shower head, such as a rain shower or side shower in a shower room.

[0037] Advantageous embodiments of the invention are illustrated in the drawings. These and further embodiments of the invention are explained in more detail below. The drawings show: Fig. 1 a longitudinal sectional view of an embodiment of the sanitary shower according to the invention, which is equipped with an embodiment of the valve according to the invention, which has an embodiment of the valve switching device according to the invention, Fig. 2 a detailed view of area II of Fig. 1with the valve switching device in a starting position, Fig. 3 the view of Fig. 2 with the valve switching device at the transition from a first to a second switching stage, Fig. 4 the view of Fig. 2 with the valve switching device at the end of the second switching stage, Fig. 5 a perspective view of the valve closing element, operating element and leaf spring element of the valve switching device in the initial position, Fig. 6 a perspective view of the valve closing element and the leaf spring element in the initial position, Fig. 7 a side view of the valve closing element and the leaf spring element in the initial position, Fig. 8 a top view of the valve closing element and the leaf spring element in the initial position, Fig. 9 a perspective view of the valve closing element and the leaf spring element analogous to Fig. 6 with the leaf spring element in a first modified embodiment, Fig. 10 a side view of the valve closing body and the leaf spring element of Fig. 9 , Fig. 11 a perspective view of the valve closing body and the leaf spring element analogous to Fig. 6 with the leaf spring element in a second modified version, Fig. 12 a side view of the valve closing body and the leaf spring element of Fig. 11 , Fig. 13 a perspective view of the valve closing body and the leaf spring element analogous to Fig. 6 with the leaf spring element in a third modified version, Fig. 14 a side view of the valve closing body and the leaf spring element of Fig. 13 , Fig. 15 a perspective view of the valve closing body and the leaf spring element analogous to Fig. 6 with the leaf spring element in a fourth modified embodiment, Fig. 16 a side view of the valve closing body and the leaf spring element of Fig. 15 , Fig. 17 the side view of Fig. 16 in an operating position at the transition from a first to a second switching stage, Fig. 18 the side view of Fig. 16at the transition from the second to a third switching stage, Fig. 19 the side view of Fig. 16 at the transition from the third to a fourth switching stage, Fig. 20 the side view of Fig. 17 at the end of the fourth switching stage and Fig. 21 a force-displacement characteristic curve diagram of the restoring force of the leaf spring element as a function of the switching distance for a design of the leaf spring element according to the Figs. 15 to 20 .

[0038] As can be seen from the figures, which illustrate advantageous exemplary embodiments of the valve switching device according to the invention, the valve according to the invention equipped therewith, and the sanitary shower according to the invention equipped with such a valve, the valve switching device according to the invention comprises a valve closing element 1, a user-operated control element 2 coupled to the valve closing element 1, and a spring-elastic return element in the form of a leaf spring element 3. The valve closing element 1 is located along a switching path SW, in which Fig. 2 , 7 and 21 For example, between a starting position AP, into Fig. 2 and 21 exemplified, and an end position EP, in which Fig. 4 and 21 As an example, the leaf spring element 3 is movable. The leaf spring element 3 exerts a restoring force RF on the valve closing element 1 along the switching path SW. Figs. 2 to 4and 21 As an example, in the direction of the starting position AP.

[0039] In corresponding embodiments, the leaf spring element 3 is formed integrally with at least one part 1a of the valve closing element 1 adjacent to the leaf spring element 3. More specifically, in the examples shown, the valve closing element 1 and the leaf spring element 3 are formed as a single component.

[0040] In corresponding embodiments, as in the examples shown, the Figs. 1 to 8 and 15 to 20The restoring force RF of the leaf spring element 3 along the switching path SW of the valve closing element 1 exhibits a multi-stage force-displacement characteristic. This multi-stage force-displacement characteristic comprises at least a first force-displacement curve KW1 in a first sub-section SW1 of the switching path SW and a second force-displacement curve KW2, different from the first, in a second sub-section SW2 of the switching path SW, as shown in the characteristic curve diagram of Fig. 21 specified.

[0041] In corresponding implementations, the leaf spring element 3, as in the examples shown, is designed as a compression spring element, i.e., it is subjected to compression when the valve closing element 1 is moved along the switching path SW from its initial position AP towards the end position EP. Alternatively, the leaf spring element 3 can, for example, be designed as a tension spring element.

[0042] In advantageous embodiments, the leaf spring element 3 is formed integrally with at least one part 1a of the valve closing element 1, preferably made of a plastic material. This part 1a of the valve closing element 1 is a portion of the same adjacent to the leaf spring element 3. In the examples shown, the leaf spring element 3 is formed integrally with the valve closing element 1, not just with a portion of it. Alternatively, instead of a plastic material, the leaf spring element 3 and the valve closing element 1, or at least the portion 1a adjacent to it, can be made of a metal material.

[0043] In advantageous implementations, the switching path SW, as in the examples shown, is designed as a translational switching path, i.e., the valve closing element 1 is moved translationally along the switching path SW. The movement of the valve closing element 1 can consist solely of this translational displacement movement, or the valve closing element 1 can be moved in a more complex movement between its valve positions, where the translational switching path forms one of several motion components of this more complex adjustment movement of the valve closing element, e.g., a combined rotary and linear movement. In particular, the translational movement of the switching path SW can, as in the examples shown, be an axial movement of the valve closing element 1 parallel to a longitudinal axis thereof.

[0044] In advantageous embodiments, as in the examples shown and in Fig. 21As illustrated, in cases with multi-stage force-displacement characteristics, the first and second force-displacement curves KW1, KW2 are essentially linear characteristic curves that join each other at a kink point KP. Such linear curves are generally easy to implement with spring elements, such as the leaf spring element 3, since spring elements inherently exhibit a linear force-displacement characteristic over a relatively large spring travel. In this case, the first and second force-displacement curves KW1, KW2 differ in their characteristic curve slope. In the example shown, Fig. 21The slope, and thus the increase in spring force RF with a given shift travel increment, is greater for the second force-displacement curve KW2, and therefore in the second shift travel sub-range SW2, than for the first force-displacement curve KW1 or in the first shift travel sub-range SW1. At the inflection point KP, the user receives haptic feedback, due to the corresponding change in the restoring force behavior of the leaf spring element 3, indicating that they are at the transition between the two associated shift travel sub-ranges SW1 and SW2. Fig. 21 symbolized by a vertical first boundary line G1.

[0045] In advantageous embodiments, the valve closing element 1, as in the examples shown, is rotatably arranged and axially movable with an axial movement component forming the switching path SW. In the examples shown, a longitudinal center axis of the valve closing element 1 acts as the axis of rotation DA for the rotary movement component of the valve closing element 1.

[0046] In certain embodiments, the leaf spring element 3 is rotationally fixed to the valve closing element 1 and has a pivot bearing part 4, as is the case in the examples shown. Specifically, in the examples shown, the leaf spring element 3 and the valve closing element 1 are formed as a single unit, thus simultaneously providing a rotationally fixed connection between these two components. The pivot bearing part 4 on the leaf spring element 3 can be used to mount the assembly of leaf spring element 3 and valve closing element 1 to a stationary part of the valve switching device so that it can rotate freely.

[0047] In certain embodiments, the valve switching device has a wall 5 located at a distance opposite the valve closing element 1, on which a counter-bearing part 6 is formed that rotatably interacts with the pivot bearing part 4 of the leaf spring element 3. In this case, the assembly consisting of the leaf spring element 3 and the valve closing element 1 can be rotatably mounted on this wall 5. This wall can, for example, be that of a valve body or valve housing body.

[0048] In advantageous embodiments, the valve closing element 1, as in the examples shown, has a disc-shaped closing part 1c, from one of whose main faces an actuating pin 1b projects, which is coupled to the user-operated control element 2. With the disc-shaped closing part 1c, the valve closing element 1, as thus designed, can fulfill its intended valve functionality by controlling the fluid flow in the respective valve. For this purpose, the valve closing element 1 can be actuated by the user via its actuating pin 1b by appropriately manipulating the control element 2. In particular, the valve closing element 1, with its disc-shaped closing part 1c, can interact with one or more corresponding valve seats in such a way that a supplied fluid is shut off or directed differently in the various valve positions of the valve closing element 1.

[0049] In corresponding embodiments, the leaf spring element 3, as in the examples shown, is connected to the other main side of the disc-shaped closing part 1c of the valve closing body 1, i.e., the leaf spring element 3 and the actuating pin 1b are located on opposite sides of the disc-shaped closing part 1c. This spatially separated arrangement allows the two components to be designed independently of each other; i.e., the actuating pin 1b does not restrict the design possibilities for the leaf spring element 3, and conversely, the actuating pin 1b can be freely designed according to its requirements without the leaf spring element 3 requiring any restrictions in this regard.

[0050] In corresponding embodiments, the actuating pin 1b, as in the examples shown, is arranged concentrically to a longitudinal axis of the valve closing element 1, which acts as the axis of rotation DA for a corresponding rotational movement of the valve closing element 1. Alternatively, or, as in the examples shown, additionally, the leaf spring element 3 is arranged concentrically to the longitudinal axis of the valve closing element 1, which acts as the axis of rotation DA for the valve closing element 1. As already mentioned, in the examples shown, the longitudinal center axis of the valve closing element 1 acts as said axis of rotation DA. This axis runs perpendicular to the disc-shaped closing part 1c, i.e., it forms a normal direction to a plane of the disc-shaped closing part 1c.

[0051] In corresponding implementations, the pivot bearing part 4 of the leaf spring element 3 is arranged, as in the examples shown, in an end region 3a of the leaf spring element 3 facing away from the disc-shaped closing part 1c of the valve closing body 1. In corresponding applications, this enables a simple pivot bearing arrangement for the assembly consisting of the leaf spring element 3 and the valve closing body 1.

[0052] In advantageous embodiments, the valve switching device, as in the examples shown, includes a switching device 7 for cyclically switching the valve closing element 1 between several possible valve positions, wherein the actuating pin 1b is coupled to the switching device 7. Switching devices with this functionality are known per se and therefore require no further explanation here. They are based, for example, on a switching mechanism similar to that found in conventional ballpoint pen mechanisms; see also the prior art mentioned at the beginning. For coupling with the switching device 7, the actuating pin 1b in the examples shown is provided at its free end region with an associated switching profile 7a, which interacts with a corresponding switching profile 7b that is formed as a further part of the switching device 7 on the operating element 2, as is particularly evident in Fig. 5 evident.

[0053] In advantageous embodiments, the leaf spring element 3, as in the examples shown, includes a leaf spring ring 8 which has a closed or open ring shape and whose ring plane RE is parallel to the switching path SW. Specifically, the Figs. 13 and 14 One embodiment shows an open leaf spring ring 8; in the other embodiments shown, the leaf spring ring 8 is closed. The ring plane RE, i.e., the plane formed by the ring shape, is shown in the top view of Fig. 8 as the intersection line of the ring plane RE with the drawing plane and forms in the side views of the ensemble of leaf spring element 3 and valve closing body 1 according to the Fig. 7, 10 , 12, 14 and 16 to 20The plane of the drawing. The translational switching path SW in these examples is parallel to a corresponding plane direction of the ring plane RE. This means that the leaf spring ring 8 is deformed in its ring shape by the movement of the valve closing element 1 along the switching path SW, i.e., it provides the restoring force RF by compressing its ring shape.

[0054] In corresponding implementations, the leaf spring ring 8, as in the examples shown, has a circular or oval basic shape, the extent of which parallel to the shift path SW is no greater than perpendicular to the shift path SW. Specifically, in the examples shown, the extent parallel to the shift path SW is smaller than perpendicular to it. This is exemplified in Fig. 7 illustrated. There, the expansion parallel to the switching path SW is designated as expansion AP, the expansion of the leaf spring ring 8 perpendicular to the switching path SW as expansion AS.

[0055] In advantageous embodiments, the leaf spring ring 8, as in the examples shown, is connected to the valve body 1 via a central spacer pin 9 at a closing element-side part 8a. This allows the leaf spring ring 8 to exhibit spring-like compliance relative to the valve closing element 1 or its disc-shaped closing part 1c, at least in a corresponding portion of the overall movement of the valve closing element 1 along the switching path SW. Due to its deformation, the leaf spring ring 8 can reduce its initial distance from the valve closing element 1 or its disc-shaped closing part 1c, provided by the central spacer pin 9, in its lateral region and come into contact with the valve closing element 1, whereupon the restoring force RF can change its behavior.In other words, this measure can provide a transition from the first to the second force-displacement curve KW1, KW2 for the restoring force behavior of the leaf spring ring 8.

[0056] In advantageous embodiments, the leaf spring ring 8 has a meandering structure 19 in a part 8b facing away from the closing element, with a distance from the valve closing element 1 and / or from the part 1a on the closing element side that meanders parallel to the switching path SW. Figs. 1 to 8 Figures 15 to 20 show corresponding embodiments with such meander structure 19. The meander structure 19 enables an elastic deformation behavior of the leaf spring ring that is advantageous for many applications of the valve switching device and is particularly well suited to providing a multi-stage force-displacement characteristic with two or more stages for the restoring force RF of the leaf spring ring 8 along the switching path SW.

[0057] The Figs. 1 to 4Figure 1 illustrates an embodiment of a sanitary shower according to the invention, here by way of example a hand shower. As can be seen, the sanitary shower comprises a shower body 14 with a fluid inlet area 15, which in the illustrated embodiment includes a fluid inlet 15a for supplying a shower fluid; in alternative embodiments, it includes several fluid inlets for supplying several shower fluids. Furthermore, the shower body 14 comprises a fluid outlet area 16 with at least one fluid outlet 16a for dispensing the shower fluid, in the illustrated example in the form of a plurality of spray-forming jet outlet openings, as well as a fluid channel structure 17 for guiding the shower fluid from the fluid inlet area 15 to the fluid outlet area 16.

[0058] Furthermore, the sanitary shower includes a valve 18 in an embodiment according to the invention, which in turn is equipped with a valve switching device 13 in an embodiment according to the invention and serves for user-operated control of a shower fluid supplied to the sanitary shower and discharged by it as a corresponding shower jet. Specifically, the valve 18 includes a valve body 10, which has a valve chamber 11 and a valve seat 12 adjacent to the valve chamber 11. The valve closing element 1 of the valve switching device 13 is arranged in the valve chamber 11 and is movably held on the valve body 10 from at least a first valve position to a second valve position, thereby cooperating with the valve seat 12 to control the fluid flow.The first valve position is formed from the starting position AP of the valve closing element 1, and the switching path SW forms at least part of the movement of the valve closing element 1 from the first to the second valve position.

[0059] Valve 18 can be used, for example, for sanitary showers that are designed to dispense shower fluid in one of several different spray patterns. As is known in the art, these spray patterns can differ, for example, in spray intensity and / or in their spray pattern or in the spatial distribution of the respective spray outlet openings.

[0060] For the application shown in the sanitary shower, the valve switching device 13 can, for example, be configured such that the valve closing element 1 is cyclically switched between several valve positions by a combined axial and rotary movement. For example, there can be four valve positions, each differing by a 90° rotation of the valve closing element 1. To switch from one valve position to the next, the valve closing element 1 is lifted axially from the valve seat from its current rotary position by a translational stroke along the switching path SW and then lowered back onto the valve seat, whereby the valve closing element 1 is additionally rotated by the required angle.Depending on requirements and system design, this rotary movement can occur during and / or after the axial lifting movement and / or between the lifting and lowering movements and / or during the axial lowering movement, preferably not before the lifting movement and not after the lowering movement, in order to avoid rotating the valve closing element 1 in contact with the valve seat 12.

[0061] In the sanitary shower application shown, the operating element 2 is a push button which, in the case shown, is arranged on the underside of a shower head part of the shower body 14 and is held or guided axially on the shower body 14.

[0062] In the exemplary embodiment of the Figs. 1 to 8The leaf spring element 3, as mentioned, is formed as a closed leaf spring ring 8 with a meandering structure 19, extending laterally at a slight distance, provided by the central spacer pin 9, from the disc-shaped closing part 1c of the valve closing body 1. In this embodiment according to the Figs. 1 to 8The leaf spring ring 8 provides the restoring force RF along the switching path SW in the aforementioned two-stage force-displacement characteristic, with the first force-displacement curve KW1 in the first switching path section SW1 and the different second force-displacement curve KW2 in the second switching path section SW2. For this purpose, the meander structure 19 in this example has an upward-pointing and a downward-pointing meander arc on each of the two sides extending transversely from the longitudinal center axis of the valve closing element 1 or the axis of rotation DA. Here, the directions upward and downward refer to those parallel to the switching path SW, with the upward direction denoting the direction in which the valve closing element 1 moves from its initial position AP towards the switching path end position EP. The detailed views of the Figs. 2 to 4 illustrate the valve functionality made possible by this.

[0063] Fig. 2Figure 1 shows the valve switching device with the valve closing element 1 in its initial position AP with its disc-shaped closing part 1c in contact with the valve seat 12. The leaf spring ring 8, with its restoring force RF, holds the valve closing element 1 pressed against the valve seat 12. When the user presses the push button and thereby moves the valve closing element 1 axially, Fig. 2 upwards, and lifts it with its disc-shaped closing part 1c from the valve seat 12, the leaf spring ring 8 begins to deform flexibly, initially primarily by moving with its closing-body-side part 8a in the lateral area towards the disc-shaped closing part 1c of the valve closing body 1, until it comes into contact with it, as in Fig. 3 shown.

[0064] Subsequently, the disc-shaped closing part 1c of the valve closing element 1 blocks this elastic evasive movement of the leaf spring ring 8, so that the further compliant deformation of the leaf spring ring 8 essentially consists of the part 8b facing away from the closing element with the meandering structure 19 moving towards the part 8a on the closing element side of the leaf spring ring 8 until it comes into contact with the closing element side part 8a with a lowermost part of its meandering structure 19, as shown in Fig. 4 shown. Due to the changed bending behavior of the leaf spring ring 8, the force-displacement characteristic of the restoring force RF it provides changes accordingly. This means that the restoring force RF of the leaf spring ring 8 along the switching travel section SW1 of the valve closing element 1 from the initial position AP according to Fig. 2 into the intermediate position according to Fig. 3the first force-displacement curve KW1 and in the subsequent, second switching path sub-area SW2 of the valve closing element 1 from the intermediate position according to Fig. 3 into the final position according to Fig. 4 which exhibits a different second force-displacement curve KW2 than the first. In the intermediate position of Fig. 3 The user receives haptic feedback upon reaching this position. In relevant system applications, they can then decide whether to continue pressing the control element 2 or the push button, or to stop at this point. As soon as the user releases the control element 2 or the push button, the leaf spring ring 8 pushes the valve closing element 1 back until its disc-shaped closing part 1c rests against the valve seat 12 again.

[0065] In the final position EP of Fig. 4Further axial movement of the valve closing element 1 is generally undesirable, which is why this is counteracted by appropriate system design, such that further movement would only be possible with a very high force. The user thus receives haptic feedback that the desired end position EP of the valve closing element's switching path SW has been reached.

[0066] The Figs. 9 to 12Figure 1 illustrates two variants regarding the design of the closed ring shape for the leaf spring ring 8, in these cases without the meandering structure 19. These designs are particularly suitable for applications where a single-stage force-displacement characteristic of the restoring force RF of the leaf spring ring 8 along the switching path SW of the valve closing element 1 is expedient or sufficient. In these designs, the leaf spring ring 8 has a substantially elliptical or oval basic shape, the minor semi-axis of which is parallel to the switching path SW and the major semi-axis of which is oriented perpendicular to the switching path SW. The deformation of the leaf spring ring 8 during movement of the valve closing element 1 along the switching path SW therefore occurs primarily by compression along the minor semi-axis of the oval shape. This can be achieved, for example, by a slightly wavy profile of the ring shape, as in the exemplary embodiment shown in Figure 2. Figs. 9 and 10, or by a differently modified course compared to the non-wavy course in the embodiment of the Figs. 11 and 12 to influence the restoring force behavior of the leaf spring ring 8 in a desired way, in particular with regard to linearity and slope in the characteristic curve diagram of the force-displacement curve.

[0067] The Figs. 13 and 14Figure 1 illustrates a variant design with an open ring shape of the leaf spring ring 8. In this design, the leaf spring ring 8 has a ring section 20a on the closing element side and two spring arms 20b, 20c on the opposite ring section. Each spring arm is connected at one end to a free end of the closing element-side ring section 20a via an associated bending joint 21a, 21b, and extends obliquely upwards towards each other from its free end. When the valve closing element 1 moves along the switching path SW, the spring arms 20b, 20c can move elastically inwards, thereby providing the linearly increasing restoring force RF. Depending on requirements, the open leaf spring ring 8 in this variant can be designed with a single-stage or two-stage force-displacement characteristic. For the two-stage force-displacement characteristic, the leaf spring ring 8 can, for example, be designed with a single-stage or two-stage force-displacement characteristic.such that it is designed so that it first primarily yields elastically with its ring part 20a on the closing body side, until this comes into contact with the disc-shaped closing part 1c of the valve closing body 1, after which the spring arms 20b, 20c are primarily deformed, which then represents the second stage of the force-displacement characteristic.

[0068] The Figs. 15 to 20 Illustrating one embodiment in which the leaf spring ring 8 is closed and its part 8b facing away from the closing element is provided with the meander structure 19, wherein in this example the meander structure 19 differs from that in the embodiment of the Figures 1 to 8additional meandering arcs. More precisely, in this case, the meandering structure 19 has, on each of the two sides extending transversely from the longitudinal center axis of the valve closing element 1 or the axis of rotation DA, an outer upward-pointing meandering arc 19a1 and an inner upward-pointing meandering arc 19a2, as well as an outer downward-pointing meandering arc 19b1 and an inner downward-pointing meandering arc 19b2. This design of the meandering structure 19 enables the provision of at least four-stage force-displacement characteristics for the restoring force RF of the leaf spring ring 8. Figs. 17 to 20 Illustrating different bending positions of the leaf spring ring 8 when the valve closing element 1 is moved along the switching path SW. Fig. 21 The characteristic curve diagram illustrates the force-displacement characteristic, which can be at least four stages, for this and functionally similar embodiments.

[0069] The Figs. 15 and 16The assembly of valve closing element 1 and leaf spring ring 8 for this embodiment of the leaf spring ring 8 in the initial position AP is illustrated. Fig. 21 The origin of the abscissa in the characteristic curve diagram is marked, along which the switching travel SW is plotted, while along the ordinate the restoring force RF of the leaf spring element 3 or leaf spring ring 8 is plotted. As shown Fig. 21 As can be seen, the restoring force RF of the leaf spring ring 8 on the valve closing element 1 in this initial position AP already has a relatively small value, not zero. This means that the valve closing element 1 is pre-tensioned into its initial position AP by the leaf spring ring 8, e.g., in contact with a valve seat, such as the valve seat 12 in the exemplary embodiment of the Figs. 1 to 4 .

[0070] When, during operation, the valve closing element 1 is moved from its initial position AP along the switching path SW, the leaf spring ring 8 initially yields elastically primarily with its closing element-side part 8a until its side regions come into contact with the disc-shaped closing part 1c of the valve closing element 1. This spring behavior corresponds to that of the leaf spring ring 8 in the embodiment shown in the Figs. 1 to 8 , i.e. the ensemble of valve closing body 1 and leaf spring ring 8 is located in the first switching path sub-area SW1 with the first, linear force-displacement curve KW1.

[0071] Fig. 17Figure 1 shows the assembly of valve closing element 1 and leaf spring ring 8 when the leaf spring ring 8, with its closing element-side portion 8a, has come into contact with the disc-shaped closing part 1c of the valve closing element 1. As the valve closing element 1 continues to move, this changes the restoring force behavior of the leaf spring ring 8, specifically the slope of the still essentially linear force-displacement curve, as also shown above in the exemplary embodiment of the Figs. 1 to 8 for the leaf spring ring 8 there. In other words, the aforementioned second shift path section SW2 then has the second, linear force-displacement curve KW2, which differs from the first and has a modified characteristic curve slope; in the example shown, specifically with a larger characteristic curve slope. As already mentioned and in Fig. 21As shown, the first and second force-displacement curves KW1, KW2 connect via the inflection point KP, which is located at the transition from the first to the second switching path sub-area SW1, SW2 symbolized by the first boundary line G1.

[0072] As the valve closing element 1 moves further along the second switching path section SW2, the leaf spring ring 8 then, in the exemplary embodiment, Figs. 15 to 20 primarily with a laterally outer area of ​​its meander structure 19, until the meander structure 19 with its two outer, downward-pointing meander arcs 19b1 comes into contact with the closing body-side part 8a of the leaf spring ring 8. Fig. 18The assembly of valve closing element 1 and leaf spring ring 8 is shown in this state. As these outer downward-pointing meander arcs 19b1 come into contact with the closing element-side part 8a of the leaf spring ring 8, the restoring force behavior of the leaf spring ring 8 changes again when the valve closing element 1 continues to move along the switching path SW. More precisely, the force-displacement curve changes from the second linear force-displacement curve KW2 to a third force-displacement curve KW3, which is again essentially linear, but has a steeper characteristic curve slope, as shown in Fig. 21 to recognize. The third force-displacement curve KW3, which is accordingly associated with a third sub-section SW3 of the switching path SW, connects at a second inflection point KP2 to the second force-displacement curve KW2, which is located at the transition from the second to the third switching path sub-section SW2, SW3, in Fig. 21 represented by an associated second boundary line G2.

[0073] As the valve closing element 1 moves further along the switching path SW, the leaf spring ring 8 bends primarily in the area of ​​the two inner upward-pointing meander arcs 19a2 such that their curvature increases, i.e., they fold increasingly together. In the Figs. 18 and 19 This bending behavior is represented by the reduction of an associated curvature angle α of the upward-pointing inner meander arcs 19a2. Fig. 19 Figure 1 shows the assembly of valve closing element 1 and leaf spring ring 8 in a state where the upward-pointing inner meander arcs 19a2 can no longer be folded further, i.e., the associated curvature angle α has reached a minimum value. This state represents the endpoint of the third force-displacement curve KW 3 or the third switching-displacement sub-range SW3.

[0074] As the valve closing element 1 continues to move along the switching path SW, the bending behavior of the leaf spring ring 8 changes again. Specifically, the leaf spring ring 8 then yields elastically primarily because the inner upward-pointing meander arcs 19a2 perform a kind of rolling movement, in which their outer flank is supported by the outer downward-pointing meander arc 19b1, which rests against the closing element-side part 8a, and their inner flank moves against the switching path SW, i.e., in Fig. 19 downwards, they are pulled. Correspondingly, the angle of curvature of the inner downward-pointing meander arcs 19b2 decreases. This again changes the force-displacement curve, i.e., the previous third force-displacement curve KW3 transitions into a different fourth force-displacement curve KW4, which is essentially linear but has a steeper slope than the third force-displacement curve KW3, as shown in Fig. 21 illustrated. The movement of the valve closing element 1 along the switching path SW is then consequently located in a fourth switching path sub-area SW4 adjoining the third switching path sub-area SW3, with the transition into Fig. 21 with a third boundary line G3, at which a third inflection point KP3 of the force-displacement curve from the third to the fourth force-displacement curve KW3, KW4 is located.

[0075] Fig. 20 The ensemble of valve closing element 1 and leaf spring ring 8 is illustrated at the end of the fourth switching path section SW4 or at the end of the fourth force-displacement curve KW4. For this embodiment, this represents the endpoint EP of the movement of the valve closing element 1 along the switching path SW. In this state, the meander structure 19, with its inner downward-pointing meander arcs 19b2, also comes into contact with the closing element-side part 8a of the leaf spring ring 8, as shown in the figure. Fig. 20This is evident. Further deformation of the leaf spring ring 8 is then only possible with significantly higher force and is preferably not intended for the normal operation of the valve switching device.

[0076] As explained, this allows for the use of the implementation variant of Figs. 15 to 20For valve actuation by the user, a four-stage force-displacement characteristic is provided, according to which the user experiences an increased restoring force or has to apply an increased actuating force in each subsequent switching stage. The transition from one switching stage to the next, i.e., from one to the next sub-section of the switching path SW, is haptically indicated to the user by the inflection points KP, KP2, KP3 of the force-displacement curve. In the examples shown, all force-displacement curves are essentially linear. In other embodiments of the invention, one or more of the force-displacement curves may be non-linear if this offers advantages for related applications. The leaf spring element 3 is then designed accordingly to provide such a non-linear force-displacement curve.

[0077] In the illustrated embodiments, the leaf spring element 2 is formed integrally with the valve closing element 1. In alternative embodiments not shown, the leaf spring element 3 is manufactured separately from the valve closing element 1 as an independent component and is then connected to the valve closing element 1. In other embodiments not shown, the leaf spring element 3 is stationary on an associated wall of the valve switching device or the valve, such as the aforementioned wall 5, either by being formed integrally with this wall or by being attached to the wall as an independent component. In this case, the valve closing element 1 can be rotatably mounted or guided on the leaf spring element 3 if a rotational movement of the valve closing element 1 is required.In other embodiments of the invention, the leaf spring element 3 is connected to the operating element 2, either by being formed as a single unit with it or by being attached to it. In this case as well, the valve closing element 1 can be rotatably mounted or guided on the leaf spring element 3 if required.

[0078] In the illustrated embodiments, the leaf spring element 2 acts directly on the valve closing element 1 with its restoring force RF. In alternative embodiments of the invention, the leaf spring element 2 acts directly on the operating element 2 with its restoring force RF and indirectly on the valve closing element 1 via the latter.

[0079] As the illustrated and further embodiments described above clearly demonstrate, the invention provides a valve switching device that can be manufactured with comparatively little effort, has advantageous switching functionalities that can be optimally adapted to many applications, and offers the user convenient haptic feedback during the switching process initiated by the user. In addition, the invention provides a valve and a sanitary shower head with corresponding advantages, in that the valve is equipped with such a valve switching device and the sanitary shower head has such a valve.

[0080] It is understood that the valve according to the invention can be used not only in sanitary showers, but also in other applications wherever there is a need for a valve that is equipped with a valve switching device which has the aforementioned advantageous switching functionalities.

Claims

1. Valve switching device, in particular a sanitary valve switching device, comprising: - a valve closing element (1) movable along a switching path (SW) between an initial position (AP) and an end position (EP), - a user-operated control element (2) with which the valve closing element (1) is coupled for actuation, and - a spring-elastic return element which applies a return force (RF) to the valve closing element (1) along the switching path (SW) in the direction of the initial position (AP), characterized by the fact that- the spring-elastic return element is a leaf spring element (3), - wherein the leaf spring element (3) is formed in one piece with at least one part (1a) of the valve closing element (1) adjacent to the leaf spring element (3) and / or - wherein the return force (RF) along the switching path (SW) has a multi-stage force-displacement characteristic with a first force-displacement curve (KW1) in a first sub-area (SW1) of the switching path (SW) and with a second force-displacement curve (KW2) different from the first in a second sub-area (SW2) of the switching path (SW).

2. Valve switching device according to claim 1, further characterized by the fact that- the leaf spring element (3) is designed as a compression spring element and / or - the leaf spring element (3) is formed in one piece with at least the part (1a) of the valve closing element (1) adjacent to the leaf spring element (3) and / or - the switching path (SW) is designed as a translational switching path and / or - the first force-displacement curve (KW1) and the second force-displacement curve (KW2) are essentially linear curves that connect at a kink point (KP), and / or - the valve closing element (1) is arranged to be rotatable and axially movable with an axial movement component forming the switching path (SW).

3. Valve switching device according to claim 1 or 2, further characterized by the fact that the leaf spring element (3) is rotationally fixed to the valve closing body (1) and has a rotary bearing part (4).

4. Valve switching device according to claim 3, further characterized bya wall (5) located at a distance opposite the valve closing body (1), on which a counter bearing part (6) is formed which rotates together with the rotary bearing part (4).

5. Valve switching device according to one of claims 1 to 4, further characterized by the fact that the valve closing body (1) has a disc-shaped closing part (1c) from one of whose main sides an actuating pin (1b) protrudes, which is coupled to the user-operated control element (2).

6. Valve switching device according to claim 5, further characterized by the fact that the leaf spring element (3) is connected to the other main side of the disc-shaped locking part (1c).

7. Valve switching device according to claim 5 or 6, further characterized by the fact that the actuating pin (1b) and / or the leaf spring element (3) is arranged centrally to a longitudinal axis of the valve closing element (1) which acts as a rotation axis (DA) for the valve closing element (1).

8. Valve switching device according to one of claims 5 to 7, further characterized by the fact that the pivot bearing part (4) of the leaf spring element (3) is arranged in an end region (3a) of the leaf spring element (3) facing away from the disc-shaped closing part (1c) of the valve closing body (1).

9. Valve switching device according to one of claims 5 to 8, further characterized by a switching device (7) for cyclically, rotatingly switching the valve closing element (1) between several valve positions, wherein the actuating pin (1b) is coupled to the switching device (7).

10. Valve switching device according to one of claims 1 to 9, further characterized by the fact that the leaf spring element (3) includes a leaf spring ring (8) which has a closed or open ring shape and whose ring plane (RE) is parallel to the shift path (SW).

11. Valve switching device according to claim 10, further characterized by the fact thatthe leaf spring ring (8) has a circular or oval basic shape, the extent of which parallel to the shift path (SW) is not greater than perpendicular to the shift path (SW).

12. Valve switching device according to claim 10 or 11, further characterized by the fact that the leaf spring ring (8) is connected to the valve closing body (1) via a central spacer pin (9) with a closing body-side part (8a).

13. Valve switching device according to one of claims 10 to 12, further characterized by the fact that the leaf spring ring (8) in a part (8b) facing away from the closing element has a meandering structure (19) with a distance from the valve closing element (1) and / or from the part (8a) on the closing element that is parallel to the switching path (SW).

14. Valve, in particular a sanitary valve, comprising - a valve body (10) having a valve chamber (11) and a valve seat (12) adjoining the valve chamber (11), and - a valve switching device (13) according to one of claims 1 to 13, - wherein the valve closing element (1) is arranged in the valve chamber (11) and is movably held on the valve body (10) at least from a first valve position to a second valve position and interacts with the valve seat (12) to control fluid flow, - wherein the initial position (AP) of the valve closing element (1) forms the first valve position and the switching path (SW) forms at least a part of the movement of the valve closing element (1) from the first to the second valve position.

15. Sanitary shower, in particular a sanitary hand shower, comprising - a shower body (14) with a fluid inlet area (15) comprising at least one fluid inlet (15a) for supplying a shower fluid, a fluid outlet area (16) comprising at least one fluid outlet (16a) for dispensing the shower fluid, and a fluid channel structure (17) for guiding the shower fluid from the fluid inlet area (15) to the fluid outlet area (16) and - a valve (18) according to claim 14 for user-operated control of the dispensed shower fluid.

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