EP1449594A1 - Dispenser for dispensing fluid medium from a container - Google Patents

Abstract

Dispenser (1) for dosed discharge of a liquid medium from a container comprises a manually operated pivot lever (28) that is pivoted toward the dispenser housing against a restoring force. During the pivoting movement the quantity of medium to be dispensed is transported into a discharge chamber and at the same time a spring element (21) coupled to the pivot lever is tensioned. When a sufficient pivot position of the pivot lever is reached, the spring element is released with an explosive-like pressure drop or is released for a controlled pressure drop on unloading the pivot lever. The spring element is coupled to an element (13) defining the discharge chamber so that during its release the element reduces the volume of the discharge chamber and the medium is transported from the discharge chamber to a discharge opening.

Description

The invention relates to a dispenser for metered dispensing one in a container located liquid medium, with a manually operated actuator, on its operation a certain amount to be given Medium is sucked out of the container and dispensed.

Such dispensers are known per se, they serve for example for dispensing small amounts of a perfume, hair sprays, etc. Such donors, mostly have an atomizer, are usually during the spraying process with a finger pressed or pulled. As a rule, an actuator to press, which causes the medium to be delivered over the atomizer is dispensed. During pressing becomes a spring strained for the subsequent aspiration and at the same time the spray pressure for the Delivery of a few bar, usually up to a maximum of 3 bar by the relative speed, with which the actuator is pressed generated. This process takes place because the medium in a partially filled with air receptacle is and sucked in via a connected to the dispenser tube is, preferably in a vertical position. In horizontal position or vice versa In the vertical position, air is sucked in, so delivery is not possible.

In known dispensers, the fineness of the atomization and thus the Uniformity of application and application of the medium on the one hand the atomizer used, but on the other hand primarily from the discharge pressure from. A high discharge pressure leads to a finer atomization and thus for a more homogeneous application and application, a droplet formation, for example on the skin or in the hair and the like is largely avoided. Known dispensers but as described only allow the generation of a very low discharge pressure too.

The invention is based on the problem to provide a dispenser, a Release with high discharge pressure for manual operation allows.

To solve this problem is in a dispenser of the type mentioned provided according to the invention that a manually operated pivot lever is provided, which is pivotable against a restoring force to the dispenser housing is, during which pivoting movement the amount of medium to be dispensed promoted in a dispensing chamber and at the same time a motion coupled with the pivot lever Spring element is tensioned, which when reaching a sufficient Einschwenkstellung the pivot lever for explosive relaxation is released or by relieving the pivot lever to the controlled Relaxation is released, wherein the spring element with a discharge chamber limiting element is so motion-coupled that at its relaxation reduces the element volume of the dispensing chamber while dispensing the medium from the dispensing chamber to a dispensing opening is taken. With "actuation" of the pivot lever is present meant the pivoting of the pivot lever to the dispenser housing.

The dispenser according to the invention provides an operation in such a way that at Actuation of the pivot lever initially with him directly or indirectly motion coupled Spring element is stretched. It is about this so an energy storage "charged", which later used defined and the actual Levy can be "unloaded". This is done according to a first invention alternative only when the swivel lever has been moved far enough and one release the spring element causing Einschwenkstellung is achieved. This spring element is now again with an output chamber delimiting element directly or indirectly motion coupled. Relax now the spring, so this element is taken along, during this entrainment movement the delivery chamber into which the medium to be dispensed previously during the preceding Operation of the pivot lever was promoted, is reduced. It So occurs during the quasi-explosive relaxation of the spring element a piston-like reduction of the delivery chamber. During this relaxation and thus downsizing, the medium is pumped out of the delivery chamber.

According to a second alternative of the invention, the delivery by a manual caused relief of the pivot lever can be obtained. Will the pivot lever Relieves something, it pushes the restoring force back from the case, the Spring element can relax, which as in the first alternative, the Reduced volume of the discharge chamber and delivered previously aspirated medium becomes. Depending on how quickly the pivot lever is relieved, relaxed The spring element is faster or slower, allowing a controlled, too Any interruptible delivery is possible.

The dispenser according to the invention thus initially allows introduction of the dispensed Medium into the delivery chamber, where it absorbed virtually unpressurized is, the spring element is taut, but acts, as the coupling with the pivot lever retained, not yet on the medium. this happens only when the spring element is released. It is obvious that the discharge pressure adjusted by appropriate design of the spring element can be. The greater the spring force, the higher the pressure. The medium is at high pressure via the atomizer or dispenser delivered, there is a very fine atomization and homogenization, which is advantageous.

The pivot lever is expediently counter to the restoring force of a spring element, preferably a simple leaf spring movable. This pivoting lever is suitably in a position close to the housing by means of a Slider lockable, which slider simultaneously opens the discharge opening and excludes what prevents pollution. In this way, the Swivel lever then, when the dispenser is not needed, "parked" near the housing become. In this case, the pivot lever may be spring-loaded such that it upon actuation of the slider by the restoring force of the spring element in one of Spender housing protruding, his movement enabling operating position is moved. The pivot lever is thus in a simple way when needed by actuation of the slide and simultaneous opening of the discharge opening turned to the outside, he is only turn to the dispenser housing to operate to press.

In a particularly advantageous embodiment of the invention, it is further provided that the element bounding the dispensing chamber is motion-coupled to the pivoting lever in such a way is that upon actuation of the pivot lever, the dispensing chamber is moved magnifying. The enlargement of the delivery chamber leads to a negative pressure in the delivery chamber, the suction of another Liquid from the container causes.

During operation of the pivot lever is also a with the pivot lever motion-coupled longitudinally movable displacer in the container guided, whereby an overpressure in the container is effected. The negative pressure in the Dispensing chamber on the one hand and the pressure in the container on the other hand lead to that the medium in the container in a leading to the dispensing chamber Suction channel and is sucked or pressed into the discharge chamber.

Upon actuation of the pivot lever so the discharge chamber, due to the inevitably preceding earlier relaxation of the spring its minimum Has increased size, resulting in simple, direct or indirect motion coupling of the swing lever with the delimiting element that the brings the piston effect described above, is realized. At the same time, while this movement to the chamber enlargement with the pivot lever also moved directly or indirectly motion-coupled displacer and in the Container, that is guided in the medium to be dispensed. This is an overpressure produced in the container, through which the medium into a suction channel leading to the chamber and is pushed over this into the chamber.

So here is a simultaneous movement of several parts when the pivot lever is moved. It may expediently the limiting the dispensing chamber Element be connected to the displacer. In the displacer is the intake passage itself, that is, the displacer is a kind of hollow cylinder, in which the medium is conveyed from below, where the displacement piston passing through the intake passage to the discharge chamber delimiting element extends from where a secondary channel to Dispensing chamber leads.

The spring element itself is expediently with one end on the displacer piston at a local storage section and at the other end stable in position arranged a spring holder. About this a motion coupling is so realized that at a tensioning of the spring element at the same time also the displacer and due to the coupling of the displacer with the Delivery chamber delimiting element also moves this. Vice versa of course, a same motion coupling when relaxing the spring element realized here are also displacer and the chamber limiting Element taken while relaxing the spring.

For simultaneous movement is further provided according to the invention that the Pivoting lever at least one at one of the displacer or at the discharge chamber limiting element provided projecting cam attacking Section is provided, during a movement of the pivot lever the cam and thus the element and the displacer at the same time Tension of the spring element moves. So it is a takeaway mimic from the cam on the one hand and provided on the pivot lever section provided, on the other hand, the cause of the movement of the whole internal intake and Abgabemimik is.

In the first alternative of the invention, the above-mentioned cam is reached the releasing Einschwenkstellung released, so that the spring element itself can relax. In the second alternative, the cam also slides when relaxing of the spring element along the section. The section on the Guide the pivot lever have a curved surface, with which he at a Movement slides along a position-fixed guide section along. During this Movement takes the portion of the pivot lever with the cam, about what the Abgabemimik, so the chamber limiting element, the displacer and the spring element are pressed down, the spring element is stretched and the medium is sucked.

The coupling of the pivot lever with the above cam is present in particular in view of the achievable discharge pressure of particular importance to. It has already been explained that the achievable discharge pressure directly with the achievable bias of the spring element is related. It is too Take into account that a particularly high preload when manually operated only by a corresponding gear ratio is possible. This gear ratio is present from the coupling between the pivot lever and made the cam. For this purpose, the above-mentioned section of the Swing lever one - possibly additional - curve surface.

In a particularly preferred embodiment, the above-mentioned cam surface a corresponding slope, which in the actuation of the pivot lever in Engagement with the cam comes. The flatter the slope is designed, the higher is the achievable preload at the same operating force. This is it possible, with the same operating force, the bias of the spring element and thus increase the achievable delivery pressure almost arbitrarily. It is obvious that such a gear ratio with an extension the actuation path is bought.

For reasons of safe guidance, it is expedient if the pivot lever two above-mentioned sections are provided, which are connected to two opposing one another Cams on the displacer or on the discharge chamber delimiting Attack element. The one or more sections can be at a or two arranged on the pivot lever and into the interior of the dispenser housing be provided for cross-arms. The arms are in the case at Pressing the swing lever inserted, via the curve guide described above then the cams are moved down.

As described, the introduction or suction of the medium takes place during actuation, So when pivoting the pivot lever. The actual media delivery takes place when the dispensing chamber limiting element depending on the design is moved explosively or controlled for chamber reduction. To avoid that in this case the medium in the dispensing chamber is pushed back into the container, according to the invention at the discharge chamber delimiting element provided a valve over which the medium in the discharge chamber is promoted, and in a reduction of the discharge chamber closes the intake passage and a reflux during the medium delivery prevented. It is therefore a simple check valve. The intake channel, as described first passes through the displacer sets continue in the displacement piston located on the chamber-limiting element, where the valve is provided so that a simpler, more straightforward and safe to open and to be closed medium path to the discharge chamber is realized. there the valve may be a ball valve with a ball received in a ball seat be, which by a short piece, z. B. about 0.5 mm between a suction channel opening position and closing position is movable.

As described, the dispensing chamber may be in its volume during the aspiration process enlarged and reduced during the dispensing process, which is realized via the movable element limiting the delivery chamber. This requires to provide a further chamber part, which in contrast stable in position is. For this purpose, according to the invention in the substantially hollow cylindrical the delivery chamber delimiting element a more stable, the delivery chamber otherwise limiting use provided. The insert has a needle-shaped Part on, the form-fitting in the discharge chamber limiting element is arranged. In this case, the insert has a discharge opening, in particular leading to a nozzle discharge channel for auszubringende from the dispensing chamber Medium up.

The discharge chamber limiting element is thus quasi-cylindrical, in this attacks the needle-shaped part of the insert, both are against each other movable. The dispensing chamber is about to change during movement Realized space between the element and the insert. From the use leads the above discharge channel to a discharge opening, where expediently a micro nozzle, which allows extremely fine atomization. Under use Such a micro nozzle in conjunction with the very high discharge pressure can achieve an extremely fine atomization of the liquid medium.

In view of the considerably high producible delivery pressures, it is expedient if the dispensing chamber limiting element and possibly the at least partially needle-shaped insert of metal, in particular aluminum or stainless steel. However, it is also conceivable to use plastic parts, if the spring element is designed so that pressures in the lower area produce the above-mentioned pressure interval, which also a plastic version still withstood.

In a further development of the invention can be provided that preferably as Coil spring formed spring element received in a pen holder is, wherein the coil spring and the spring holder from the displacer piston or the delivery chamber limiting element are interspersed.

As described, the displacer piston upon actuation of the pivot lever led into the container for volume reduction and then at Relax the spring element pulled out of this again. This is it expedient to provide a positionally fixed longitudinal guide for the displacer, which has a sealing member for sealing off sealing element to Avoid getting media past the displacer during this movement is pulled out of the container.

Furthermore, a valve element leading to the container interior can be provided, is sucked into the container interior via the air when the displacer piston is pulled out of the container interior when relaxing the spring element. It Thus, air is continuously sucked into the container.

The dispenser according to the invention expediently comprises a housing from an upper and a lower housing portion, preferably attached to the pen conveniently via notches or the like are.

Fig. 1

eine Explosionszeichnung eines erfindungsgemäßen Spenders,

Fig. 2

eine erste Perspektivdarstellung des zusammengebauten Spenders aus Fig.1,

Fig. 3

eine zweite Perspektivdarstellung des zusammengebauten Spenders aus Fig. 1,

Fig. 4

eine Frontansicht im Schnitt des Spenders aus Fig. 2 in geschlossener Stellung,

Fig. 5

eine Seitenansicht im Schnitt des Spenders aus Fig. 2 in geschlossener Stellung,

Fig. 6

eine Ansicht entsprechend Fig. 5 mit nach außen geschwenktem Schwenkhebel und

Fig. 7

den Spender aus Fig. 6 nach Bewegen des Schwenkhebels bis kurz vor der Freigabestellung.

Further advantages, features and details of the invention will become apparent from the embodiments described below and with reference to the drawings. Showing:

Fig. 1

an exploded view of a dispenser according to the invention,

Fig. 2

a first perspective view of the assembled dispenser of Figure 1,

Fig. 3

2 is a second perspective view of the assembled dispenser of FIG. 1;

Fig. 4

1 is a front view in section of the dispenser of FIG. 2 in the closed position,

Fig. 5

3 is a side view in section of the dispenser of FIG. 2 in the closed position,

Fig. 6

a view corresponding to FIG. 5 with swung outwardly pivoted lever and

Fig. 7

the dispenser of Fig. 6 after moving the pivot lever until shortly before the release position.

Fig. 1 shows a dispenser 1 according to the invention in an exploded view. Shown is an upper housing part 2 and a lower housing part 3, which is the overall housing of the dispenser 1 form. The upper housing part 2 at its upper-side opening connected downstream is a nozzle unit 4, consisting of a not shown in detail Mikrosprühdüse that in the at least partially needle-shaped insert. 5 is integrated. At this insert 5 of the micro-spray nozzle is associated with a nozzle holder 6. The preferably designed in metal nozzle holder 6 is a Union nut 7, preferably also made of metal, secured. The nozzle unit 4 is arranged in a received in the upper housing part 2 holding part 8, the the upper side has an opening 9 enabling the medium output. Further is a slider 10 is provided which is used to open and close the opening 9 and the opening 11 in the upper housing part 2 and for locking and releasing the Swing lever 28 is used.

The insert 5 has a cylindrical - needle-shaped - part 12, on the in Connection with the element 13, the discharge chamber is formed, in the brought later described container 26 liquid located is before it is launched. The needle-shaped part 12 of the insert 5 is inserted into the hollow cylindrical member 13 from above positively. While the insert 5 is fixed, the element 13 is movable in this regard. in the Element 13 is a valve - check valve - comprising a ball 14 at the bottom End provided, wherein the ball 14 is held by a spring 15 and over Sealing and retaining rings 16 is sealed and held. The spring 15 holds the ball 14th with low height clearance. On the top side, the sealing and retaining rings 16 on the Element 13 via the preferably likewise made of metal nut 17th attached. The element 13 is made - after it together with the insert 5 or the needle-shaped part 12 forms the discharge chamber, which is a high pressure must withstand - also preferably made of metal.

The insert 13 in turn is in a displacer 18, the hollow cylinder is formed, used. The displacer 18 has an intake passage inside 39 on. He engages in the installed position in the container 26, so that via the intake passage 39 to be dispensed through the displacer 18 to the ball valve in the element 13 and this in the formed discharge chamber is eligible. This will be discussed in more detail below.

On the upper side 18 are two oppositely arranged on the displacer Cam 19 is provided, via which the vertical movement of the displacer 18th realized in connection with the actuator to be described later. Furthermore, an abutment flange 20 for a spring element 21 in the form of a Coil spring provided, which coil spring in a spring holder 22, the is penetrated by the displacer 18, is received. The torsionally stable storage the displacement piston 18 via two projecting lugs 23, the engage in corresponding receptacles on the spring holder 22. The penholder 22 serves as described on the one hand for receiving the spring element 21, on the other he also serves a mounting option for the Gehäusober- and - Lower part 2, 3 to create, both on him on any configured detent connections etc. are held. The spring holder 22 also has front and rear Wall sections 24, which are used to close recesses 25 in the lower housing part 3 serve.

Downstream of the pen holder 22 is a container 26. The container 26 itself is via twisting or latching projections 27 provided with the spring holder 22 Engagement projections cooperate, fixed or interchangeable in the lower housing part 3 used.

The operation of the dispenser 1 via an actuating element in the form of a Swing lever 28, in a suitable swivel mount or storage 29th on the lower housing part 3 against the force of a spring 30, here a helical spring, is held. On the pivot lever 28 are formed on two arms sections 31 provided on the one hand via corresponding cam surfaces of abutments 37 are guided in the upper housing part 2 and on the other hand with the projecting Cams 19 cooperate on the displacer 18 to this when pressing of the pivot lever 28 to press down. This will be explained later. At the sections 31 two release openings 32 are further provided, by the two cams 19 with sufficient further movement of the pivot lever 28 are released again and the spring element 21 is relieved. Finally, a recess 33 is provided into which a locking portion 34 on Slider 10 for holding the pivot lever 28 in a folded, close to the housing Position intervenes. Furthermore, two arms 35 are provided with latching hooks 36, engage behind the corresponding abutment sections on the spring holder 22 and the Limit unfolding movement of the pivot lever 28.

Figs. 2 and 3 show the dispenser 1 according to the invention in the assembled Condition, in which case the pivot lever 28 is folded outward. The slider 10 is pushed down, the locking portion 34 of the recess 33rd pulled out, so that the pivot lever 28 by the action of the spring 30th limited by the latch hooks 36 to the outside works. The upper opening 11 is open. In the closed, locked position, as shown in Figs. 4 and 5 is, the pivot lever 28 is in direct contact with the housing base 3, over the slider 10, it is locked. For releasing the pivot lever 28 the slider 10 is to push down, which causes the pivot lever 28 via the spring 30 at an angle of approximately 12 ° about its lower pivot point is pressed to the outside in the position shown in Fig. 2 and 3. This Position is limited by the fact that the latching hooks 36 strike.

If now the defined amount of liquid to be dispensed, then the Swing lever 28 pressed to the housing. This causes the upper camming surfaces the sections 31 on fixed abutments 37 on the holding part. 8 glide along. The undersides 38 of the sections 31 also form cam surfaces. These cam surfaces 38 are configured such that the cams 19 and with them, the displacer 18 are pressed down into the container 26. This is shown in FIGS. 6 and 7.

In a preferred embodiment, the coupling between the cam surfaces 38 acts and the cam 19 as a gear ratio. This means in the present case that with low manual actuation force causes a high force on the cam 19 can be, so that as a result, with a low manual operating force one high bias of the spring element 21 can be achieved.

In a further preferred embodiment, the cam surfaces 38 are substantially wedge-shaped, so that the desired translation and thus the desired Bias is adjustable over the wedge angle. It was in general Part of the description already explains that the amount of bias of the Spring element 21 is the cause of the amount of the achievable discharge pressure. With the above gear ratio, it is possible with manual operation almost to reach any delivery pressures.

During the above operation of the pivot lever 28 from the position in Fig. 6 in the position in Fig. 7 are simultaneously a series of parts movements, which will be discussed below.

4, the element 13 is fixed in the piston-type displacement piston 18 recorded. Will now starting when pressing the pivot lever 28 from the position in Fig. 6, the displacer 18 due to the cam coupling pressed down, the element 13 is taken along at the same time. The element 13 becomes relative to the needle-shaped part 12 of the insert 5 moved, which is positional, that is, it is relative to the needle-shaped part 12, the positively received in the element 13, pulled down. It will between the lower end of the needle-shaped part 12 and the inner wall of the element 13 a discharge chamber is formed or enlarged, the larger is pushed, the further the displacer 18 down or the Swivel lever 28 is pressed. The enlargement of the discharge chamber causes a negative pressure in the discharge chamber and as a result, a suction of the medium from the container 26.

By the movement of the displacer 18 in the container 26 whose Volume reduced, which leads to the fact that an overpressure is formed, which causes the medium contained in the container 26 in addition to the intake passage 39 is pressed in the displacer 18.

The above intake passage 39 opens into a further intake passage 40 in the element 13, which intake passage 40 via the ball valve or the ball 14 is opened and can be closed. When inserting the displacer 18 presses the medium from below against the ball 14, this moves slightly upwards, the intake passage 40 is opened, the medium may enter the forming delivery chamber, which is enlarged piece by piece with the lever movement sucked or be pressed. This can therefore be filled the delivery chamber become.

Simultaneously with the movement of the displacer 18, the spring element 21 tense. This is the upper side as described against the abutment flange Stored 20 of the displacer 18, the other end, it rests in the position-stable pen 22. When moving the displacer 18 down is also the Abstützflansch 20 moves downward, the spring element 21 is compressed and curious. The movement of the pivot lever 28 for filling takes place until the lower sides 38 lie with their ends on the cam 19.

To release the pivot lever 28 is now a little further from that shown in Fig. 7 Position (about 2 ° to the housing near end position) to move. This causes the sections 31 a little further relative to the cam 19th be moved. The openings 32 reach the area of the cams 19, these are released and can through the openings 32 back up be brought into the area above the sections 31. However, the cams 19 are released, the spring element 21 is no longer locked, that is it can relax. During this explosive relaxation, the Displacer 18 abruptly pulled upwards out of the container 26. With he is also the element 13 catapulted upward, which is between him and the needle-shaped part 12 of the insert 5 trained discharge chamber is suddenly reduced in volume. The medium there is, after the check valve by means of the ball 14 down to the intake passage 40th closes, pressed into the discharge channel 42 of the insert 5, from where it is to the micro nozzle arrived and delivered. This position is shown in Fig. 5, where the spring element 21 is relaxed again (although there the slider 10 is closed which would be naturally open during actuation).

The needle-shaped part 12 of the insert 5 is cylindrical and has as described the discharge channel 42. The discharge channel 42 opens on the upper side in the actual Jet recording. The diameter of the needle-shaped part 12 corresponds the diameter of the cylindrical cavity in element 13, so that both fit into each other in a form-fitting manner. In the position shown in Fig. 6 is the Element 13 as far as possible pushed over the needle-shaped insert 12. Now, the pivot lever 28 is actuated and the displacer 18 and with him When the element 13 moves, the element 13 becomes downwardly from the needle-shaped one Part 12 of the insert 5 deducted. Between the bottom of the needle-shaped Part 12 of the insert 5 and the over the check valve or its ball 14 limited lower element portion and the inner wall of the element 13 is thereby continuously increasing the delivery chamber open, in the via the intake passage 40 and the check valve, the medium is conveyed. Conversely, the movement takes place when ejecting. By relieving the spring element 21, the element 13 in turn on the needle-shaped part 12 of the insert 5 is pushed, the underside of the needle-shaped part 12 of the Insert 5 wanders down in the hollow cylindrical space, the discharge chamber decreases, the check valve is closed, that in the delivery chamber located medium is at high pressure via the open discharge channel 42 after pushed outside. Both the insert 5 and the element 13 are expediently in view of the high prevailing pressures not in plastic, but designed for example in aluminum or stainless steel.

With the release takes place due to the withdrawal of the displacer 18th from the container 26 a negative pressure generation in the container 26. This leads to that air is sucked into the container 26 via a sealing element 43. Will now relieves the pivot lever 28, it will be on the spring 30 back into the in Fig. 6 brought home position shown, a re-loading and dispensing process can to be started. For the container 26 are customary, from the prior Technique known versions, also with drag piston or in collapsible Execution.

The pressure with which the medium is expelled, by appropriate Design of the spring element 21 can be adjusted. The higher the spring force, the higher the pressure. Because of the existing gear ratio, it is now possible, even at a low manual operating force high bias the spring element as a result and to achieve a high discharge pressure. The handling remains easy despite these extremely high pressures, they can with done by a hand, since the two processes "suction" (ie the filling of Discharge chamber) and "discharge" (ie the discharge under relaxation of the Spring element) run separately from each other. Using a microspray system can be done an extremely fine delivery.

The high-pressure dispenser according to the invention can be used for liquid media in the areas Technology, cosmetics and pharmacy are used. He is inexpensive can be produced with few parts. After the spring element 21 is not with the medium comes in contact, it can be manufactured inexpensively.

Claims (27)

Dispenser for the metered dispensing of a liquid medium contained in a container, with which a certain amount of medium to be dispensed is sucked and discharged from the container, characterized in that a manually actuated pivot lever (28) is provided, which pivots against a restoring force to the dispenser housing is, during which pivotal movement conveyed the amount of medium to be dispensed into a dispensing chamber and at the same time with the pivot lever (28) motion-coupled spring element (21) is tensioned, which is released upon reaching a sufficient pivoting position of the pivot lever (28) for explosive relaxation or by Relief of the pivot lever (28) is released for controlled relaxation, wherein the spring element (21) with a delivery chamber delimiting element (13) is coupled in such a way that when it relaxes the element (13) the volume of the discharge chamber and thereby reducing the medium from of the Dispensing chamber is taken to a discharge opening to take off. Dispenser according to claim 1, characterized in that the pivoting lever (28) against the restoring force of a spring element (30) is movable. Dispenser according to claim 2, characterized in that the pivot lever (28) can be locked in a position close to the housing by means of a slide (10) by means of which the dispensing opening can be reversibly closed at the same time. Dispenser according to claim 3, characterized in that the pivot lever (28) is spring-loaded in such a way that it is moved upon actuation of the slide (10) by the restoring force of the spring element (30) in a projecting from the dispenser housing, its movement enabling operating position. Dispenser according to one of the preceding claims, characterized in that the dispensing chamber delimiting element (13) is coupled to the pivoting lever (28) in such a way that it is moved during an actuation of the pivoting lever (28) enlarging the dispensing chamber during which actuation with the displacement lever (28) movement-coupled displacer (18) is guided into the container (26), whereby the medium is pressed into a leading to the discharge chamber suction channel (39) and into the discharge chamber. Dispenser according to claim 5, characterized in that the dispensing chamber limiting element (13) with the displacer (18) is connected. Dispenser according to one of claims 5 or 6, characterized in that the spring element (21) with one end on the displacement piston (18) on a bearing portion (20) and with the other end is stored in a stable position on a spring holder (22). Dispenser according to one of claims 5 to 7, characterized in that the suction channel (39) extends through the displacer piston (18) and the dispensing chamber delimiting element (13). Dispenser according to one of claims 5 to 8, characterized in that on the pivot lever (28) at least one on a on the displacer piston (18) or on the discharge chamber delimiting element (13) provided projecting cam (19) engaging portion (31) is provided, in a movement of the pivot lever (28) the cam (19) and thus the element (13) and the displacer (18) moves with simultaneous tension of the spring element (21). Dispenser according to claim 9, characterized in that the portion (31) has a cam surface with which it slides along a positionally fixed guide portion (37) during a movement. Dispenser according to claim 9 or 10, characterized in that the portion (31) has a - possibly additional - cam surface (38), that the cam surface (38) is engageable with the cam (19) and that the coupling between the Curve surface (38) and the cam (19) acts as a gear ratio. Dispenser according to claim 11, characterized in that the cam surface (38) is configured substantially wedge-shaped. Dispenser according to one of claims 9 to 12, characterized in that the section (31) releases the cam (19) for relaxation of the spring element (21) upon reaching the sufficient pivoting position. Dispenser according to one of claims 9 to 13, characterized in that two sections (31) are provided which engage two opposing cams (19) on the displacer piston (18) or on the element (13). Dispenser according to one of Claims 9 to 14, characterized in that the section or sections (31) are provided on one or two arms arranged on the pivot lever (28) and engaging in the interior of the dispenser housing. Dispenser according to claim 5 and optionally according to one of claims 6 to 15, characterized in that on the dispensing chamber delimiting element (13) a valve - check valve - is provided, via which the medium is conveyed into the discharge chamber, and in the reduction the discharge chamber closes the intake passage (39) leading to the discharge chamber and prevents backflow during delivery of the medium. Dispenser according to claim 16, characterized in that the valve is a ball valve with a ball seated in a ball seat (14). Dispenser according to one of the preceding claims, characterized in that in the substantially hollow cylindrical element (13) delimiting the dispensing chamber a positionally stable insert (5) delimiting the dispensing chamber at the end is provided with a dispensing channel (42) leading to the dispensing opening, in particular a nozzle. for the medium to be dispensed from the dispensing chamber is positively arranged, wherein the element (13) is moved with respect to the insert (5) for changing the dispensing chamber volume. Dispenser according to one of the preceding claims, characterized in that the dispensing chamber limiting element (13) and optionally the insert (5) are made of metal. Dispenser according to one of the preceding claims, characterized in that the spring element (21) designed as a helical spring is accommodated in a spring holder (22), wherein the helical spring and the spring holder (22) from the displacer piston (18) or the element bounding the dispensing chamber (22). 13) is interspersed. Dispenser according to one of the preceding claims, characterized in that a position-fixed longitudinal guide for the displacement piston (18) is provided, which has a sealing piston (18) towards sealing sealing element (43). Dispenser according to one of the preceding claims, characterized in that a leading to the container interior valve element is provided, is sucked through the air into the container interior, when the displacer (18) is pulled out of the container interior during relaxation of the spring element (21). Dispenser according to one of the preceding claims, characterized in that it comprises a housing consisting of an upper and a lower housing portion (2, 3), which are preferably fastened to the spring holder (22). Dispenser according to one of the preceding claims, characterized in that the container (26) is a substantially dimensionally stable container (26) or a deformable container (26), in particular a tube. Dispenser according to one of the preceding claims, characterized in that fastening means (27) are provided for releasably securing a container (26) containing the medium to be dispensed. Dispenser according to claim 25, characterized in that the fastening means comprise a threaded portion onto which the container can be screwed. Dispenser according to claim 25, characterized in that the fastening means (27) comprise a receptacle in the manner of a bayonet closure, with which the container (26) can be latched.

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