EP3541719A1

EP3541719A1 - Discharge head for a liquid dispenser and liquid dispenser having such a discharge head

Info

Publication number: EP3541719A1
Application number: EP17803841.0A
Authority: EP
Inventors: Tobias Baumann
Original assignee: Aptar Radolfzell GmbH
Current assignee: Aptar Radolfzell GmbH
Priority date: 2016-11-17
Filing date: 2017-11-10
Publication date: 2019-09-25
Anticipated expiration: 2037-11-10
Also published as: DE102016222682B3; CN109963791A; US20200055643A1; KR20190084958A; CN109963791B; US11077993B2; EP3541719B1; KR102502821B1; WO2018091377A1

Abstract

Discharge heads (10) for liquid dispensers (100) are known. Such a discharge head (10) of the type in question has a housing (20) and a coupling device (24) for attaching to a liquid store (90). Said discharge head also has a discharge opening (38), through which liquid can be discharged into a surrounding atmosphere, and an outlet channel (30), which extends from a inlet region (32) facing the liquid store (90) to the discharge opening (38) and by means of which the discharge opening (38) can be supplied with liquid. In order to throttle the liquid to be discharged, in particular for the purpose of discharging drops, the discharge head (10) has a throttle device (34) in the outlet channel (30), which throttle device has a throttle channel (50; 60; 70) for reducing the liquid pressure and/or the liquid flow of the liquid flowing through the throttle device (34). According to the invention, the throttle device (34) is designed as a switchable throttle device (34), in the case of which a minimum free cross-section of the throttle channel (50; 60; 70) can be changed between a throttling state and an open state in such a way that liquid flowing out toward the discharge opening (38) is subjected to a greater throttling effect by virtue of the throttling state of the throttle channel (50; 60; 70) and the liquid flowing back in toward the inlet region (32) is subjected to a lesser throttling effect by virtue of the open state.

Description

Discharge head for a liquid dispenser and liquid dispenser with such a discharge head

AREA OF APPLICATION AND PRIOR ART

The invention relates to a discharge head for a liquid dispenser and a liquid dispenser with such a discharge head. It is preferably a dispensing head or a liquid dispenser for dispensing cosmetic or pharmaceutical liquids in the form of drops.

Generic liquid dispensers and their discharge heads are usually designed to dispense liquid, which is supplied in a predetermined liquid flow range and / or pressure range, in the desired shape, ie for example in the form of individual drops. However, if the liquid dispenser is supplied with liquid that is delivered directly by the user, a well-defined supply pressure or supply liquid flow can not be guaranteed. For example, a user may squeeze a squeeze bottle much more than intended.

In a generic liquid dispenser, a throttling device is therefore provided in the outlet channel, that is to say a partial section within which, for example, a sufficiently high friction in the liquid and between the liquid and walls is caused by narrow diaphragms, in order to sufficiently reduce a high fluid pressure. Especially in the context of the already mentioned drop dispensers, this plays an important role, since it can only be ensured by such throttling that the pressurization of the liquid by the user does not cause a discharge jet instead of drops.

However, such a throttle device is also problematic in some respects. In particular, it may undesirably prevent liquid from the outlet channel from being sucked back into the liquid reservoir after completion of the discharge operation by the negative pressure created in the liquid storage. While the differential pressure between the liquid reservoir and an environment when discharging can be well above 1 bar, the negative pressure for sucking back liquid from the outlet channel into the liquid reservoir can never be more than 1 bar in principle. Practically he is much lower. TASK AND SOLUTION

The object of the invention is therefore to further develop a generic discharge head in such a way that, on the one hand, it permits a throttled discharge of liquid, in particular in the form of drops, and yet reliably makes it possible to empty or partially empty the discharge channel in the direction of the liquid store after completion of the discharge process.

It is proposed to solve this problem, a discharge head having a housing and a coupling device for attachment to a liquid storage. Furthermore, the discharge head has a discharge opening, through which liquid can be discharged into a surrounding atmosphere, and an outlet channel which extends from an inlet region pointing in the direction of the liquid storage to the discharge opening and by means of which the discharge opening can be supplied with liquid , on.

The discharge head has a throttle device in the outlet channel with a throttle channel for reducing the liquid pressure u and / or the liquid flow of the fluid flowing through the throttle device. According to the invention, the throttle device is designed as a switchable throttle device in which a minimum free cross-section of the throttle channel between a throttle state and a release state is variable. As a result, liquid flowing out in the direction of the discharge opening is subject to a higher throttling effect than liquid flowing back in the direction of the inlet region. The design according to the invention thus provides that the throttle device during the discharge of liquid performs a higher throttling, thus the liquid withdraws a higher proportion of the given by overpressure in the liquid storage energy, as it is the case after completion of the discharge in the subsequent sucking back of liquid. The change between the throttle state with strong throttling and the release state with only slight throttling preferably takes place automatically, so that the user need not consider any further measures beyond his normal handling steps for a liquid dispenser.

One possibility for the design of a switchable throttle device is the provision of an elastically deformable wall section in the throttle device, which is displaced by a pressure difference or operating parameters associated therewith, and thus affects the throttle passage throttling to various degrees. Of advantage, however, is a design in which the throttle device has a throttle body displaceable in the throttle passage between a release position and a throttle position. This throttle body is preferably an inherently rigid body, which is usually made of a plastic that is customary in the dispenser area and which, depending on its position, influences the flow resistance caused by the throttle device. A due to lack of orientation requirement advantageous shape of such D rosse Ikörpers is that of the spherical throttle body.

Relative to an upright position of the discharge head of the throttle body is preferably arranged in its release position and in its throttle position at different heights. The throttle body is so freely movable in such a design between the release position and the throttle position that he occupies the throttle position in an upright position on the one hand and in an opposite overhead position on the other hand in a case of gravity, the release position and gravity in the other case, the throttle position.

In this embodiment, it is thus provided that the throttle body changes its position within the throttle channel due to gravity or at least also due to gravity. The liquid dispenser and with him the discharge head in an upright position, wherein the discharge usually has upwards and a bottom of the liquid storage for setting down the dispenser facing down, the throttle body falls to its lowest possible Stellu ng, which also represents its release position , It can thus greatly reduce the flow resistance for the recirculating liquid from the outlet channel. If the dispenser and the dispensing head are in an overhead position in which the bottom of the liquid reservoir points upwards and / or the discharge opening points downwards, then the throttle body falls in the opposite direction into its lowest possible position, which in this orientation of the Donor is the throttle position. Here, the throttle body causes an increase in the flow resistance by leaving only a smaller partial cross section of the throttle channel for the flow of leaking fluid.

So that the throttle body does not float, it preferably has a higher density than the liquid stored in the liquid reservoir.

The throttle body can also be arranged in the throttle channel such that it displaces in the direction of its throttle position through the liquid flowing out through the throttle device is and / or that it is displaced by the liquid flowing through the throttle device in the direction of its release position.

In this described embodiment, the throttle body is arranged such that it is automatically entrained, as it were, by the liquid flow pointing in one or the other direction and thereby occupies its end position, the throttle position or the release position. The throttle body is for this purpose in particular preferably displaceable between a throttle position and a release position, which are spaced apart in the flow direction of the liquid.

This technique makes it possible to dispense with the above-described different height of the throttle position and the release position of the throttle body. Preferably, however, the discharge head is designed such that the displacement of the throttle body is both due to gravity and due to the flow conditionally changed. As a result, it is achieved particularly reliably that the throttle body assumes the throttle position during the discharge of liquid and the release position during the sucking back of liquid. Especially with highly viscous liquids such as lotions and creams, it is an advantage if both the weight and the liquid pressure rectified effect the displacement of the throttle body.

Preferably, the throttle channel, which is in particular preferably designed as an elongated channel, at the end and preferably at the two opposite end faces an inflow opening and an outflow opening. The throttle body is arranged both in a release position and in its throttle position between this inflow opening and this outflow opening.

In addition, the throttle channel preferably has at least one side opening, in particular in a jacket region of a cylindrical outer wall of the throttle channel, the throttle body being arranged in the throttle position between the side opening and the outflow opening and wherein the throttle body arrangement in the release position not between the side opening and the discharge opening is arranged.

This design accordingly provides that the liquid path of the liquid is divided into two from the liquid reservoir to the outflow opening of the throttle passage pointing in the discharge direction during discharge. On the one hand, liquid can penetrate into the throttle channel through the inflow opening, in particular preferably on the front side. On the other hand, it can penetrate through the described at least one side opening into the throttle channel. Such a design is therefore of Advantage, since the throttle body is pulled out by transfer in its release position as it were from the flow path of the back to the liquid flowing out of the outlet. By the front-side inflow opening, however, the throttle body is force-loaded and displaced reliably in the direction of its throttle position with renewed discharge of liquid. In a preferred embodiment, the throttle device has an elastically deflectable spring device, by means of which dererder throttle body is subjected to force in the direction of its release position or in the direction of its throttle position.

The named spring device can act either in the direction of throttle position or in the direction of the release position. If it acts in the direction of the throttle position, it is ensured to a particularly high degree that the throttle body assumes the throttle position particularly reliably after the liquid has been sucked back into the fluid reservoir. In particular, this is advantageous because it prevents this, that upon actuation of the liquid dispenser first a short period of time remains until the throttle body has taken its throttle position and while liquid can escape in unthrottled type. When a force is applied to the throttle body in the direction of its release position by means of the spring device is ensured to a greater extent that the throttle body does not, for example, due to the stickiness of the liquid to be discharged, remains in its throttle position, thus preventing a sucking back of the liquid from the outlet channel.

The spring device may be formed in particular as a plastic spring, preferably as a helical spring made of plastic. Furthermore, the spring device may be formed integrally with the throttle body.

The avoidance of metal as a material for the spring device is considered to be advantageous due to the risk of corrosion. In addition, plastic springs are usually cheaper. A particularly simple design can be achieved if both the one-piece design between the spring device and the throttle body and the plastic design are realized.

The throttle channel may preferably be limited to the outside by an outer wall, in particular in elongated and cylindrical, preferably circular cylindrical shape. If one or more of the above side openings are provided, this preferably breaks through the shell-like outer wall. The throttle body is disposed within the throttle passage, wherein the throttle body and the outer wall of the throttle passage have corresponding stop surfaces, by which the throttle body is secured in the throttle passage. The outer wall defines the throttle channel to the outside and is preferably frontally opposite to each other from the outflow opening and the inflow opening. By the abutment surfaces of the throttle body is preferably secured positively within the throttle channel. Preferably, an insertion bevel is assigned to the abutment surfaces, so that the throttle body can be pressed under deflection of the abutment surfaces during assembly in the throttle channel, but then safely protected against slipping out.

The outer wall of the throttle channel may, in particular, have a plurality of deflectable webs extending in a longitudinal direction of the throttle channel, preferably three or four webs, at the end of which, in particular, preferably the abutment surfaces for the throttle body are provided.

The use of a plurality of webs, in particular the use of three or four webs, results in that the throttle body is reliably guided in the throttle channel. In addition, the areas between the webs serve as a side opening in the sense described above. The use of insulated webs also means that they can be deflected independently of each other, so that a design in that the throttle body can be introduced under deformation of the webs in the throttle channel, comparatively easy falls.

In the outlet channel, an outlet valve is preferably provided, which closes at a low pressure difference, but bi-directionally opens at sufficient overpressure or negative pressure in the liquid storage, so that it not only allows a discharge at sufficient overpressure, but also does not prevent the return of liquid in the liquid storage , An inventive discharge head is intended to allow the aeration of the liquid reservoir via the outlet channel.

The liquid dispenser encompassed by the invention for dispensing liquid, in particular for dispensing cosmetic or pharmaceutical liquids, has a dispensing head of the type described above with a dispensing opening for dispensing liquid into a surrounding atmosphere. It also has a liquid storage, which is connected by a releasable coupling device or a one-piece design with a housing of the discharge head.

The liquid dispenser is preferably designed as a drop dispenser. In particular, in such a drop dispenser, it is important to restrict the liquid before discharge, so that the drop formation can be reliably. However, even here the reliable suck back of the medium from the outlet channel of great relevance, since a once filled with dried medium outlet channel just due to the throttling effect can hardly be pressurized enough to rid this again of dried medium.

The liquid storage may in particular be a squeeze bottle or a Tu be.

The internal volume of a liquid reservoir for a liquid dispenser according to the invention is preferably less than 300 ml, preferably less than 100 ml, in particular preferably less than 50 ml.

The liquid storage is filled according to the intended application two preferably with a cosmetic or pharmaceutical liquid.

BRIEF DESCRIPTION OF THE DRAWINGS

Further advantages and aspects of the invention will become apparent from the claims and from the following description of preferred embodiments of the invention, which are explained below with reference to the figures.

Fig. 1 shows a liquid dispenser according to the invention in an overall view.

Fig. 2 and 3A to 3C show a first embodiment of the liquid dispenser in a sectional view and its throttle device when using the liquid dispenser.

Fig. 4 and 5A to 5C show a second Ausführu ngsbeispiel the liquid dispenser in a sectional view and its throttle device when using the liquid dispenser.

6 and 7 and 8A to 8C show a second embodiment of the liquid dispenser in a sectional view and its throttle device in a perspective view and when using the liquid dispenser.

DETAILED DESCRIPTION OF THE EMBODIMENTS 1 shows a liquid dispenser 100 according to the invention. The latter has, as a main component, a liquid reservoir 90 in the manner of a squeeze bottle, which is subjected to a force in the region of actuating surfaces 92 for purposes of discharge. On the liquid storage 90, a discharge head 10 is placed, the housing 20 consists of two components 22 and 26. The component 26 is an applicator tip, at the distal end of which a discharge opening 38 is provided, which is surrounded by a drop formation surface 26A in the form of a spherical cap. To secure the liquid dispenser from drying out, a cap 110 is provided.

FIG. 2 shows a first exemplary embodiment of the liquid dispenser 100 in a cutaway view. Like the embodiments described below, the dispenser has the said liquid reservoir 90, to which the housing 20 with the base component 22 and the applicator component 26 is fastened. To m purposes of Aufrastens the base member 22 has a coupling device 24. Alternatively, a one-piece design would be conceivable. Between the base member 22 and the Applikatorbauteil 26 is a one-piece valve member of an exhaust valve 36 is clamped with its edge region.

This valve component is provided in an outlet channel 30, which extends from a liquid-storage-side inlet region 32 through a throttle device 34 and said outlet valve 36 to the discharge opening 38.

Upon application of force to the liquid reservoir 90 in the overhead position of the liquid dispenser 100 with downwardly directed discharge opening 38, the liquid passes from the inlet region 32 through the throttle device 34 and the outlet valve 36 to the discharge opening 38 and is discharged there in droplet form. As soon as the discharge has been completed and the user terminates the application of force to the liquid reservoir 90, a negative pressure occurs in the liquid store and the liquid from the outlet passage is intended to be sucked back into the liquid store.

Said throttle device 34 is designed to sufficiently restrict the discharge of liquid in such a way that the delivery of a continuous jet is prevented and instead the desired drop delivery takes place. When sucking back, however, should not or less throttled, so that the liquid as completely as possible can get back into the liquid storage 90. The structure described here is basically identical for all three embodiments described below.

The throttle device 34 of the first embodiment of FIGS. 2 to 3C consists of only two components, namely an outer wall 51 which is approximately cylindrical and surrounds a throttle channel 50, and a throttle body 50 arranged in the throttle body 52, in the case of this embodiment is designed as a spherical body.

The operation of the throttle device 34 will be explained with reference to FIGS. 3A to 3C.

Fig. 3A shows an initial state. When the liquid dispenser 100 is not used and is standing upright as shown in FIG. 2, the throttle body 52 rests against abutment surfaces 51B at the distal end of the throttle channel 50, which are formed on the inside of the outer wall 51 at the distal end. These abutment surfaces 51 B opposite insertion chamfers 51 C are provided, which have allowed during assembly, the throttle body 52 in the throttle channel 50 u nter deflection of three Au ßenwandungsstege 51 A of the outer wall 51 introduce.

If use now begins from the state of FIG. 3A, the user brings the dispenser into an overhead position so that the throttle device 34 assumes the position of FIG. 3B. The D rosse Ikörper 52 thereby falls due to gravity to the opposite, proximal end of the throttle channel 50, where the outflow opening 50B is provided. However, if gravity is too low to spend the throttle body 52 in the position of FIG. 3B due to too small a difference in density between the throttle body 52 and the surrounding liquid, this will be achieved at the latest by the applied pressure in the fluid and its flow.

As can be seen from the dotted lines in Fig. 3B, the passageway through the fluid restriction passage 50 toward an outflow port 50B is now significantly narrowed. The throttle body 52 fills for the most part the cross section of the throttle channel 50 immediately before the outflow opening 50B and thus causes a strong throttling of the liquid. Even with strong application of force to the liquid reservoir 90, the user thus drips as desired.

After the end of the discharge process, the dispenser is returned to its upright position of FIG. As can be seen in Fig. 3C, the throttle body 52 now falls back to the distal end of the Throttling channel 50 in the region of the inflow opening 50A, so that liquid from the outlet channel is sucked in due to the negative pressure in the liquid reservoir 90 back into this problem. The backflowing liquid assists in this displacement of the throttle body 52.

Although the spherical throttle body 52 still occupies the same space in the constant cross section of the throttle channel 50. However, the back-flowing liquid can now pass back into the liquid reservoir 90 through side openings 50C provided between the deflectable outer wall webs 51A with only slight restriction.

In the embodiment according to FIGS. 4 to 5C, the throttle device is designed somewhat differently.

As can be seen with reference to FIGS. 5A to 5C, the outer wall 61 of the throttle device 34 is here designed very similar to the previous variant. In turn, it has spaced apart longitudinally extending outer wall webs 61A with end abutment surfaces 61B and insertion bevels 61C. As a result, a throttle body 62 is secured in the throttle channel 60.

Notwithstanding the foregoing embodiment, the throttle body 62 is formed here as a disc-shaped throttle body and also integrally connected to a spring means 64 in the form of a plastic coil spring, on whose throttle body 62 opposite side an abutment disc 65 is provided.

The procedure according to the sequence described with reference to FIGS. 3A to 3C leads to the following behavior here. In the upside-down position during discharge, as shown in FIG. 5B, the thin body 62 is pressed against the proximal end of the throttle channel 60, thereby blocking most of the outflow opening 60B. The liquid can thus reach the discharge opening 38 only in strongly throttled form and thus is reliably dispensed here in drop form.

After completion of the discharge operation, however, the throttle body 62 is deflected by the liquid as it is sucked back from the outlet channel 30 through the liquid in the manner illustrated in FIG. 5C, so that the throttling effect is markedly reduced. Thus, much of the liquid can be reliably sucked out of the outlet channel 30 through the restrictor 34 back into the liquid storage 90. In this case, it leaves the throttle device through the side openings 60C, since an end-side inflow opening in this variant is permanently closed by the rear disk 65. However, this could also be designed with an opening be to facilitate the exchange of liquid between the throttle channel 60 and the liquid storage 90.

In the exemplary embodiment according to FIGS. 6 to 8C, the throttle device 34 likewise has a throttle passage 70, which extends from an inflow opening 70A to an outflow opening 70B. In this throttle channel 70, in turn, a D rosse Ikörper 72 is provided, which as in FIGS. 8A to 8C can be seen, which is displaceable by means of sliding sleeves relative to the housing 20 and the outer wall 71. As can be seen from the illustration of FIG. 7, on the inside of the outer wall 71 there is provided a conical surface 71D, which is interrupted in the region of three recesses 71E. The correspondingly also partially conical throttle body 72 is as in the embodiment of FIGS. 4 and 5 by a spring device 74, in this case preferably designed as a metallic coil spring, in the direction of its release position, shown in Fig. 8A, subjected to a force.

In a discharge, as shown in FIG. 8B, the throttle body 72 is subjected to force in the region of its end face 72A and thereby pressed into the position of FIG. 8B, in which the conical-sectioned faces of the outer wall 71 and the throttle body 72 abut one another issue. Therefore, a liquid flow can still occur during discharge by the Durchbrechu 71E shown in Fig. 7. In Fig. 8B, this is illustrated by the dotted line. The liquid flow is greatly throttled and thus suitable for the drop delivery. After the end of the dispensing operation, even before the dispenser is returned to its upright position, the throttle body 72 is urged by the spring means 74 back into its position of Figs. 8A and 8C, so that, as shown by the dotted lines, the Liquid can be sucked out of the outlet channel at low flow resistance back into the liquid reservoir.

Claims

claims

A dispenser head (10) for a liquid dispenser (100) having the following features: a. the discharge head (10) has a housing (20), and b. the discharge head (10) has a coupling device (24) for attachment to a liquid reservoir (90), and c. the discharge head (10) has a discharge opening (38) through which liquid can be dispensed into a surrounding atmosphere, and d. the discharge head (10) has an outlet channel (30) which extends from an inlet region (32) pointing in the direction of the liquid reservoir (90) to the discharge opening (38) and by means of which the discharge opening (38) can be supplied with liquid, and e. the discharge head (10) has a throttling device (34) with a throttling channel (50; 60; 70) for reducing the liquid pressure and / or the liquid flow of the liquid flowing through the throttling device (34), characterized by the following feature : f. the throttling device (34) is designed as a switchable throttling device (34) in which a minimum free cross section of the throttle channel (50; 60; 70) is variable between a throttle state and a release state such that liquid flowing out in the direction of the discharge opening (38) the throttle state of the throttle passage (50; 60; 70) is subject to a higher throttling action, and that the liquid flowing back toward the inlet section (32) is subject to a smaller throttle effect by the release state.

2. Discharge head (10) according to claim 1 with the following additional feature: a. the throttle device (34) has a throttle body (52; 62; 72) displaceable in the throttle passage (50; 60; 70) between a release position and a throttle position.

3. discharge head (10) according to claim 2 with the following additional feature: a. based on an upright position of the discharge head (10), the throttle body (52) is arranged in its release position and in its throttle position at different heights, and b. the throttle body (52) is so freely movable between the release position and the throttle position that he assumes the release position and gravity in the other case, the throttle position in an upright position on the one hand and in an opposite overhead position on the other hand in a case of gravity.

4. discharge head (10) according to any one of claims 2 or 3 with the following additional feature: a. the throttle body (52; 62, 72) is disposed in the throttle passage (50; 60; 70) such that it is displaced toward the throttle position by the fluid flowing through the throttle means (34) and / or through the throttle means flowing liquid is displaced in the direction of its release position.

5. Discharge head according to one of claims 2 to 4 with the following additional features: a. the throttle channel (50) has an inflow opening (50A) and an outflow opening (50B) at the end, the throttle body (52) being arranged both in a release position and in its throttle position between inflow opening (50A) and outflow opening (50B), and b , the throttle passage (50) has at least one side port (50C), the throttle body (52) being disposed in the throttle position between the side port (50C) and the exhaust port (50B), and wherein the throttle body (52) is not disposed when placed in the release position between the side opening (50C) and the outflow opening (50B) is arranged.

6. Discharge head (10) according to one of claims 2 to 5 with the following additional feature: a. the throttling device (34) has an elastically deflectable spring device (64; 74) by means of which the throttle body (62; 72) is subjected to force in the direction of its release position or in the direction of its throttle position, preferably with at least one of the following additional features: b. the spring device (64; 74) is designed as a plastic spring, preferably as a helical spring made of plastic, and / or c. the spring device (64) is formed integrally with the throttle body (62).

7. Discharge head (10) according to one of claims 2 to 6 with the following additional feature: a. the throttle channel (50; 60; 70) is bounded outwardly by an outer wall (51; 61; 71), and b. the throttle body (52; 62; 72) is disposed within the throttle passage (50; 60; 70), and c. the throttle body (52; 62; 72) and the outer wall (51; 61; 71) of the throttle passage (50;

60; 70) have corresponding abutment surfaces (51B, 61B, 71B) by which the throttle body is secured in the throttle passage (50; 60; 70).

8. Discharge head according to one of the preceding claims having at least one of the following features: a. the throttle body (52) is spherical, and / or b. the outer wall (51; 61) of the throttle passage (50; 60) has a plurality of deflectable outer wall webs (51A, 61A) extending in a longitudinal direction of the throttle passage, at the end thereof the stopper faces (51B, 61B) for the throttle body (52; ) are provided.

9. Discharge head (10) according to one of the preceding claims with the following additional feature: a. the discharge head (10) has an outlet valve (36) in the outlet channel (30) downstream of the throttling device (34) which opens as a function of the upstream overpressure, wherein the outlet valve (36) preferably has at least one of the following features: b. the outlet valve (36) closes automatically in a pressure interval between a defined input-side negative pressure and an input-side overpressure and opens when the defined negative pressure is exceeded and when the defined overpressure is exceeded, and / or c. the outlet valve (36) is formed of an elastic material and has an upstream curvature, in which a valve opening closable valve openings is provided so that with increasing input side pressure until reaching an input side limit overpressure, the valve pressure increasingly pressed against each other.

Liquid dispenser (100) for dispensing liquid, in particular for dispensing cosmetic or pharmaceutical liquids, having the following features: a. the liquid dispenser (100) has a dispensing head (10) having a discharge opening (38) for dispensing liquid into a surrounding atmosphere, and b. the liquid dispenser (100) has a liquid reservoir (90) which is connected by a releasable coupling device (24) or a one-piece design to a housing (20) of the discharge head (10), characterized by the feature: c. the discharge head (10) is designed according to one of the preceding claims.

11. A liquid dispenser (100) according to claim 10 having at least one of the following additional features: a. the liquid dispenser (100) is designed as a drop dispenser, and / or b. the liquid reservoir (90) is designed as a squeeze bottle or tube, and / or c. an internal volume of the fluid reservoir (90) is less than 300 ml, preferably less than 100 ml, more preferably less than 50 ml and / or d. the liquid reservoir (90) is filled with a cosmetic or pharmaceutical liquid.