Liquid dispenser and method for producing a liquid dispenser

Description

[0001] The invention relates to a method for producing a liquid dispenser and to a liquid dispenser that can be produced in particular by means of this method.

[0002] Such a liquid dispenser, which can be manufactured using the method according to the invention, is typically used for dispensing pharmaceutical or cosmetic liquids. It has a liquid reservoir for storing the liquid prior to dispensing, as well as a discharge opening through which the liquid can be discharged into the environment in one direction.

[0003] The suitable shape of the discharge opening and the discharge structure surrounding the discharge opening and in particular located downstream of it depends on the type of dispenser and in particular on the desired form of application.

[0004] Typically, the production of a liquid dispenser takes place using plastic injection molding, at least with regard to some or most of the individual parts. This means that plastic in liquid form is introduced into a cavity formed by a usually two-part mold, where it cools and solidifies and the mold is then opened so that the resulting plastic component can be removed. Unless special measures are taken, such as the use of so-called sliders, this form of production is accompanied by the requirement that the resulting plastic component remains demoldable when the mold is opened, i.e. is free of undercuts that make it difficult or impossible to separate one of the mold halves providing the cavity. This requirement means that the components of the liquid dispenser and in particular the plastic component through which the dispensing opening passes are subject to certain requirements.Their shape is limited, and in particular, a shape that not only tapers from a parting plane between the mold halves but also widens in places is difficult to implement. In the case of a liquid dispenser, this limits the possibilities for shaping the aforementioned discharge structure in the area of ​​the discharge opening.

[0005] US 2022 / 105524 A1 discloses a liquid dispenser, in particular a droplet dispenser, in which the outer component of the dispensing head is preferably manufactured by injection molding.

[0006] US 2019 / 366376 A1 discloses a method for manufacturing a guide element for a fluid dispensing pump. The method involves a plastic injection molding process for producing a base body and subsequent shape correction by applying mechanical force to create the final shape of the element. TASK AND SOLUTION

[0007] The object of the invention is to provide a manufacturing method relating to a liquid dispenser and a liquid dispenser which can be manufactured by means of this method, wherein the manufacturing method is intended to offer a high degree of flexibility in terms of shaping in the region of the discharge opening at low cost.

[0008] For this purpose, a method is proposed for producing a liquid dispenser with a liquid reservoir and a discharge opening through which liquid can be discharged into the environment in a discharge direction.

[0009] Specifically, the invention relates to the production of a housing component through which the discharge opening passes and which has a surrounding discharge structure forming the discharge opening and / or adjoining the discharge opening for influencing a discharge characteristic of the discharge opening. The housing component can be an outer housing component which, in addition to the discharge opening, also has coupling means such as an internal thread or a locking edge for coupling to a liquid dispenser. However, the housing component can also be a smaller housing component that is connected to other housing components to form an outer surface of a discharge head.

[0010] The discharge structure of the housing component surrounds the discharge path and influences the discharge characteristics, particularly through its shape downstream of the narrowest cross-section of the discharge path. In particular, the discharge structure can be designed for the purpose of droplet formation in such a way that escaping liquid adheres to the discharge structure until it detaches itself in the form of a single droplet due to gravity.

[0011] According to the invention, the housing component, through which the discharge opening passes, is manufactured by first producing a base body by plastic injection molding in a mold. Preferably, a mold is used that forms a cavity with two mold halves, thus not having any slides or the like for producing a more complex shape. However, the use of slides is also possible in a method according to the invention. Preferably, however, they do not take place in the area of ​​the discharge structure.

[0012] In particular, the base body of the housing component, i.e. the housing component in an intermediate state after primary forming by plastic injection molding, has a shape in which the component tapers in both directions starting from a separation boundary between the two mold halves and does not have any widenings that form undercuts that could make demolding from the mold more difficult.

[0013] After completion of the plastic injection molding, a second step involves applying mechanical force to the as yet unfinished discharge structure, which leads to a deformation of the base body and thus to the formation of the discharge structure with its final shape.

[0014] According to the invention, it is therefore provided that the housing component with the discharge opening is initially manufactured in a conventional manner by plastic injection molding and that the discharge structure is then plastically deformed in order to thereby influence the discharge characteristics through the discharge opening.

[0015] The resulting housing component is typically combined with other components, in particular with a component forming the liquid reservoir and other components of a discharge head, for example, valve or pump components, which, however, do not have any significant special features in the context of the invention. In particular, the discharge head, which is provided with the housing component with a discharge opening produced according to the invention, can comprise an additional outer housing, which has an opening, in particular at one end, into which the housing component designed as a liquid dispensing part is inserted.

[0016] The method according to the invention offers two main advantages: Firstly, housing components can be manufactured with an end widening and the resulting undercut without the need for a particularly complex casting mold, for example with separate movable slides.

[0017] Secondly, different discharge structures can be created without requiring different molds. Instead, a single mold is used for two different discharge structure shapes. After the base body has been manufactured by injection molding, differently shaped discharge structures are created by applying different forces to the originally identical discharge structures, each of which exhibits different discharge characteristics. Accordingly, it is proposed, in particular, to produce housing components with different discharge structures starting from identical base bodies.

[0018] It is preferred that the mechanical force is applied by means of a punch that presses against the discharge structure after the primary forming process. In particular, this can be a metallic punch that is part of the production system and automatically acts on the discharge structure during the manufacturing process with defined force / displacement parameters. The force can preferably be applied by a punch that is advanced toward the base body in the main extension direction of the discharge opening and presses against the discharge structure from the inside or, in particular, from the outside, in particular being pressed against the base body against the subsequent discharge direction of the liquid.

[0019] The punch or other element for the purpose of applying force according to the invention can, in particular, have an expanding shape, so that it comes into contact with the discharge structure as it approaches it and then increasingly expands it as it continues to advance. The shape of the discharge structure of the base body prior to the deformation taking place in the second step is preferably already provided with an internally conical shape or, if appropriate, also with an internally cylindrical shape, which is then expanded in the second step, in particular by means of the aforementioned expanding punch or other force-applying element.

[0020] It is preferably provided that at a distal end of the discharge structure, the widening taking place in the second step widens the cross section of a clear inner diameter by at least 10%, preferably by at least 20%.

[0021] The goal of applying force is to permanently change the dispensing structure, i.e., plastic deformation of the plastic material. To achieve this, the force is preferably applied to a heated component. Depending on the plastic used, the temperature of the component during deformation is preferably at least at the Vicat softening temperature. For most plastic materials, this temperature is between 60°C and 160°C. The process is generally suitable for all plastics commonly used in liquid dispensers.

[0022] The application of force to a heated component can be achieved, in particular, by applying force to the discharge structure using the punch while the base component is still warm after injection molding. Alternatively or additionally, the application of force can also be performed directly using a heated punch. In particular, the punch can be equipped with a heating element for this purpose.

[0023] In addition to using the remaining heat after injection molding and using a heated punch, it is of course also possible to heat the basic component as a whole in a separate heating step after injection molding in order to then apply the force in the heated state.

[0024] Heating the dispensing structure during force application, particularly the use of a heated plunger for the purpose of applying the force, also offers the advantage of reducing or eliminating burrs remaining from the injection molding process in the area of ​​the dispensing opening. This is a significant advantage, especially in the production of an eye-dropper dispenser.

[0025] The application of force to the discharge structure and the associated deformation does not necessarily have to be carried out by means of a separate tool such as the aforementioned stamp, but can also be carried out by an element of the liquid dispenser itself. In particular, it can be provided that the mechanical application of force and the associated deformation take place by means of a protective cap of the liquid dispenser. For this purpose, the protective cap has an expanded structure on its inside that tapers from the outside towards the discharge opening. This expanded structure is adapted to the preliminary shape of the discharge structure of the base body after the primary forming process in such a way that this discharge structure is expanded in a cup-like manner.

[0026] Such a procedure facilitates the method because the second step, the deformation of the discharge structure, is accompanied by the step of assembling the cap. Preferably, the protective cap is a separate second component from the housing component, which in particular is preferably manufactured separately. After the primary forming of the housing component with the discharge structure and, if appropriate, joining of this housing component with other housing components such as a liquid reservoir or valve or pump components, the protective cap is then fitted. During the fitting of the protective cap, force is applied to the discharge structure and, in particular, causes it to expand radially. In particular, the discharge structure is preferably heated at this time in order to achieve the desired plastic deformation of the discharge structure by means of the protective cap and the expansion structure provided thereon.By using the protective cap as an element influencing the dispensing structure, dispensers of the same construction can be provided with different dispensing structures using different protective caps.

[0027] In addition to the aforementioned manufacturing method, the invention also relates to a liquid dispenser, which can be manufactured in particular according to this method. Particularly preferably, it is a drop dispenser for dispensing discrete individual drops. Such a drop dispenser has a dispensing structure that has a droplet formation surface in the area of ​​the dispensing opening, on which the dispensed liquid accumulates. Only when the liquid quantity required for one droplet has been reached does this droplet detach from the dispensing structure due to gravity.

[0028] A liquid dispenser according to the invention has a liquid reservoir and a discharge opening through which the liquid can be dispensed into the environment in a discharge direction. The discharge opening is preferably provided on a discharge head designed for coupling to a liquid dispenser. The liquid dispenser can be designed in particular as a pump dispenser or as a squeeze bottle dispenser. In the case of a pump dispenser design, the dispenser has a pumping device with a pump chamber that is provided with a valve on the inlet and outlet sides and that can be actuated by means of an actuating handle, in particular by means of a button provided on the side of a housing of the discharge head, in order to discharge liquid from the pump chamber and to suck in new liquid from the liquid dispenser. In the case of a squeeze bottle dispenser, no pumping device is provided.Instead, the pressure is applied by elastically compressing the liquid dispenser as a whole, thereby forcing the liquid toward the discharge opening. In both the case of a pump dispenser and a squeeze bottle dispenser, it is preferable to have a discharge valve directly upstream of the discharge opening, which opens when excess pressure is applied, thus allowing the liquid to be dispensed.

[0029] The liquid dispenser comprises a housing component, in particular an outer housing of a dispensing head or a liquid dispensing part inserted therein, which is penetrated by the dispensing opening and which has a dispensing structure forming the dispensing opening and / or adjoining the dispensing opening. This dispensing structure, which in particular forms the aforementioned droplet formation surface and can be provided downstream of the dispensing opening, serves to influence the dispensing characteristics. The aforementioned droplet formation is an example of this. However, the dispensing structure could also have a different shape, for example, to generate a liquid jet.

[0030] The special feature of the liquid dispenser according to the invention is that the dispensing structure has a circumferential recess on its outer side. Compared to a cross-section of the dispensing structure at a downstream distal end, the cross-section of the dispensing structure in the region of the circumferential recess is reduced in the manner of a constriction. In the case of a drop dispenser, the distal end above the preferably has an outer diameter of at least 1 mm and / or a maximum of 3 mm, preferably with an outer diameter of at least 1.5 mm and / or a maximum of 2.5 mm. In the region of the circumferential recess below, the outer diameter is preferably at least 10% smaller, preferably at least 20% smaller.

[0031] The exact diameter at the distal end for droplet dispensing depends on the desired drop volume, taking into account the liquid, its viscosity, and density, as well as the properties of the dispensing structure material. The diameter should be selected so that a drop of the desired volume can form and, upon reaching this volume, reliably detaches from the dispensing structure and the cup shape preferably provided here due to gravity. The method according to the invention makes it possible to produce dispensing structures with a shape ideally adapted to the liquid, starting from basic components of the same shape after injection molding by subsequent deformation and, in particular, widening of the distal end of the dispensing structure.

[0032] The cup shape, resulting from the circumferential recess below the distal end of the dispensing structure, leads to advantageous geometric conditions at the upper edge of the cup to prevent the liquid from escaping from the interior of the dispensing structure during droplet formation. On the outside of the dispensing structure, it preferably has an external widening region that continuously widens in the dispensing direction and extends from the circumferential recess to the distal end of the dispensing structure. An angle between a surface of the external widening region, i.e., a straight line lying in the plane of the widening region, and the dispensing direction is preferably more than 20°, particularly preferably more than 30° or 40°.

[0033] Preferably, the flat or internally conical droplet formation surface formed by the discharge structure is delimited on the outside at the distal end of the discharge structure by a separation edge that impedes the escape of the liquid. In particular, the separation edge can be designed with a radius of curvature of more than 0.05 mm, in particular more than 0.1 mm, to prevent injuries caused by the separation edge.

[0034] The dispensing structure in the recess area is preferably burr-free. Burrs in the dispensing structure area should be avoided, as they pose a hazard, especially for medications that are applied to the eyes. If a sharp-edged burr comes into contact with the eye, it can cause injury.

[0035] The absence of burrs in the area of ​​the recess can be achieved, in particular, by the method described above. While the molding of a discharge structure with a circumferential recess using conventional technology has only been possible by arranging the parting line between the mold halves in the area of ​​the recess or by using a mold with slides, the method according to the invention allows the circumferential recess to be created using the described two-stage process, i.e., by producing the basic shape without a recess in a first injection molding step, which is then formed by widening the discharge structure above the recess.

[0036] The discharge structure preferably has a cup-shaped widening in respective widening regions on the outside and inside. Preferably, an angle between a surface of the outside widening region and the discharge direction is smaller than an angle between a surface of the inside widening region and the discharge direction. The cup-shaped wall of the discharge structure preferably becomes thinner toward the distal end.

[0037] As already described above, it is possible to use the manufacturing method according to the invention in such a way that the plastic deformation of the discharge structure takes place starting from the basic shape using the protective cap as a force-applying element.

[0038] A liquid dispenser according to the invention therefore preferably has a removable and replaceable protective cap that covers the dispensing opening when in place and on the inside of which an expanded structure is provided, which, when the protective cap is in place, rests against an inside of the dispensing structure. Because the shape of the dispensing structure is determined during production by means of the expanded structure, the expanded structure and the inside of the dispensing structure lie particularly flush against one another when the protective cap is in place. This is also an advantage because it allows liquid residues to be very reliably expelled from the dispensing structure during later use when the protective cap is replaced after use of the liquid dispenser.

[0039] It may be advantageous if the housing component penetrated by the discharge opening and the protective cap, or at least its expansion structure, are made of different plastic materials. In particular, the expansion structure can be made of a harder material and / or a material with a higher softening temperature.

[0040] The deformation of the discharge structure that occurs during the initial application of the protective cap or during use of the stamp is at least partially plastic, resulting in a permanent deformation. However, it can also be provided and achieved through suitable process parameters, in particular a suitably selected temperature, that the deformation is partially elastic, so that the discharge structure is under elastic tension when the protective cap is in place.

[0041] The protective cap should preferably not be a simple plug-in cap, but rather a form-fitting cap that prevents removal. This can be achieved, in particular, by a locking edge on the protective cap or by designing the protective cap with a thread for coupling to the outer housing of the discharge head.

[0042] The discharge opening and discharge structure of the liquid dispenser typically have a rotationally symmetrical shape. However, this is not mandatory. It can also be advantageous to provide a non-rotationally symmetrical shape, for example, a polygonal cross-section or a cross-section with discrete bulges around the circumference. In the case of a drop dispenser, this can influence the separation tendency of a drop. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Further advantages and aspects of the invention emerge 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 a sectional view. Fig. 2 shows the area of ​​the discharge opening of the liquid dispenser in an enlarged view. Fig. 3 und 4 show the use of the liquid dispenser in different orientations. Fig. 5A bis 5F show the method for manufacturing a liquid dispensing part 14 of the dispenser 10. Fig. 6 shows a liquid dispenser manufactured using a partially alternative process. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0044] Fig. 1 shows a liquid dispenser 10 extending longitudinally along a main extension axis 2, in this case, by way of example, a drop dispenser. The liquid dispenser 10 has a dispensing head 11, to which a liquid reservoir 12 is coupled by means of a snap-in connection. A pumping device 16 is provided within the dispensing head 11. This pumping device can be actuated via an actuating pushbutton 17 provided laterally on the outer housing 13 of the dispensing head 11. When actuated, this pumping device draws liquid from the liquid reservoir 12 and conveys it toward a dispensing opening 30. Fig. 2 shows the area of ​​the discharge opening 30 in an enlarged view.

[0045] The discharge opening 30 is part of a liquid dispensing part 14. This is attached to an inner component 18 of the dispenser 10 and limits the liquid path to the discharge opening 30. It has a sleeve-shaped section that projects through an opening in the outer housing 13 and at the end of which a discharge structure 40, which will be explained below, is provided.

[0046] Within the fluid discharge part 14, a valve body 19 is provided, which is pressed toward the discharge opening 30 by a coil spring 20 and closes the discharge opening 30 in a closed state. Only when the fluid pressure in an area between the pump device 16 and the discharge opening 30 has reached a sufficient pressure level does the outlet valve open by displacement of the valve body 19 against the spring force of the coil spring 20, allowing fluid to escape.

[0047] Out of Fig. 2 The discharge structure 40 is clearly visible in the area of ​​the discharge opening 30. The discharge structure 40 refers to the geometry of the areas of the liquid discharge part 14 surrounding or adjoining the discharge opening 30, which influence the shape of the discharge.

[0048] In the present case, this is a discharge structure 40 designed for the discharge of drops. The discharge structure is rotationally symmetrical to the main extension axis 2 and has a substantially cup-shaped configuration, which is primarily defined by an inner expansion region 52 that widens in the direction of discharge direction 2A and an outer expansion region 50 that also widens in the direction of discharge direction 2A.

[0049] A circumferential recess 42 is provided on the outside. This is a kind of constriction from which the liquid dispensing part 14 widens in both directions.

[0050] How Fig. 3 As illustrated, the inner widened area 52 forms a droplet formation surface 44. Liquid discharged through the discharge opening 30 initially accumulates in the area of ​​this widened area 52 until the droplet thus formed has reached a mass that separates it from the discharge structure 40 due to gravity. The widened area 52 and the end face of the discharge structure 40 together form a droplet formation surface 44.

[0051] The circumferential recess 42 allows the illustrated angle B to be provided on the outer side of the distal end of the liquid dispensing part 14. This angle B, which is preferably smaller than the angle A provided between the main extension axis 2 and the inner widened region 52, is advantageous for preventing the liquid from collecting not only in the widened region 52 and on the end face, but also from reaching the outer widened region 50 around the distal outer edge. This ensures that the amount of liquid in a drop 100 deviates from the intended amount of liquid.

[0052] Fig. 4 It is clear that angle A plays an even greater role when the drop dispenser is held at an angle during drop dispensing. If this is the case, the tendency of the liquid to move from the inner drop formation surface 44 to the outer expansion area 50 increases. The larger the angle A, the less critical such an inclination is with regard to achieving a uniform drop volume.

[0053] The described shape of the discharge structure 40 cannot be easily achieved by plastic injection molding.

[0054] Fig. 5A bis 5F show a possible process for producing the liquid dispensing part 14.

[0055] First, a base body 14' is produced. This is done by plastic injection molding. A molding tool 200 with two mold halves 202A and 202B is used, as shown in Fig. 5A The two mold halves 202A, 202B form the Fig. 5B a cavity 204, which has the negative shape of the base body 14'. Liquid plastic is injected into this cavity 204, as in Fig. 5C is shown.

[0056] After the plastic has solidified, the mold 200 is opened and the base body 14' can be removed. As can be seen from the Fig. 5A As can be seen, both mold halves 202A, 202B are shaped in such a way that no undercuts arise that could prevent demolding of the base body 14'. This can therefore be removed without deformation.

[0057] Fig. 5D shows the base body 14' after injection molding. Since the separation line 206 is located away from the Fig. 5D The still provisional discharge structure 40' is free of burrs.

[0058] Based on the state of the Fig. 5D A second step of manufacturing the liquid dispensing part 14 follows. A punch 220, which has a conical tip, is now fed from the outside and in the direction of the main extension axis 2, as shown in Fig. 5E shown.

[0059] As in Fig. 5F As shown, this punch 220 pushes the preliminary discharge structure 40' outward, thereby plastically deforming it. In particular, the base body 14' may be heated at this time, either due to the preceding injection molding step or due to a separate subsequent heating step. This increases the tendency of the discharge structure 40 to undergo plastic deformation. In addition to or as an alternative to a prior heating of the base body 14', it is also conceivable to heat the punch 220 itself.

[0060] The temperature to be selected depends on the plastic used. Preferably, the temperature is above the softening temperature of the respective plastic. In the case of polypropylene, for example, this temperature is approximately 150°C.

[0061] As soon as the plastic deformation has taken place, the plunger 220 can be removed again. What remains is the now completed liquid dispensing part 14, the discharge structure 40 of which already in Fig. 2 The cup-shaped widening allows for particularly precise dosing, as the volume of the dispensed drops varies only slightly.

[0062] Fig. 6 shows an alternative design. The special feature here is that the liquid dispensing part 14 is initially left in the shape of the base body 14', and the plastic deformation is effected by a protective cap 60.

[0063] For this purpose, the protective cap 60 has an expanded structure 62 on its inner side. Preferably, the protective cap as a whole, or at least the expanded structure 62, is made of a harder material or a material with a higher softening temperature compared to the material of the liquid dispensing part 14.

[0064] When the protective cap 60 is first placed on the dispenser, preferably screwed on by means of a thread, this expansion structure 62 presses as in the case of Fig. 5A bis 5F The plunger 220 there pushes the discharge structure 40 outward and causes a plastic deformation. This deformation preferably also occurs under the influence of heat. In particular, the liquid discharge part 14 can be at least partially heated when the protective cap 60 is placed on it.

Claims

1. Method for manufacturing a fluid dispenser with the following features: a. the fluid dispenser (10) has a fluid store (12) and a delivery opening (30) through which the fluid can be discharged to the environment in a delivery direction (2A), and b. the fluid dispenser (10) has a housing component (14) through which the continuous delivery opening (30) is made and which has a delivery structure (40) forming the delivery opening and / or adjoining the delivery opening (30), for influencing a delivery characteristic, c. the housing component (14) having the continuous delivery opening (30) is manufactured in that firstly a base body (14') is manufactured by plastic injection moulding in a casting mould (200) and then, in the region of a provisional delivery structure (40') of the base body (14'), a mechanical force is applied to deform the provisional delivery structure (40') and hence create a definitive delivery structure (40).

2. Method according to Claim 1 with the following further feature: a. the mechanical force is applied by means of a protective cap (60) of the fluid dispenser which, on the inside, has a widening structure (62) which tapers from the outside in the direction of the delivery opening and is adapted to the provisional form of the delivery structure (40') of the base body (14') such that this is widened in the manner of a cup.

3. Method according to Claim 1 or 2 with the following further feature: a. the mechanical force is applied by means of a die (220), preferably a metallic die (220).

4. Method according to Claim 3 with the following further feature: a. the mechanical force is applied by means of a heated die (220) and / or after heating of the housing component (14), wherein the temperature of the die (220) or housing component (14) preferably corresponds at least to the Vicat softening temperature of the material of the housing component (14).

5. Fluid dispenser (10), in particular in the form of a droplet dispenser, with the following features: a. the fluid dispenser (10) has a fluid store (12) and a delivery opening (30) through which the fluid can be discharged to the environment in a delivery direction (2A), and b. the fluid dispenser (10) has a housing component (14) through which the continuous delivery opening (30) is made and which has a delivery structure (40) adjoining the delivery opening (30) and surrounding a discharge path, for influencing a delivery characteristic, characterized by the following further feature: c. the delivery structure (40) has a circumferential groove (42) on its outside.

6. Fluid dispenser (10) according to Claim 5 with the following further features: a. the fluid dispenser (10) is formed as a droplet dispenser, and b. the delivery structure (40) forms a droplet formation surface (44) on which fluid discharged through the discharge opening (30) adheres to form a droplet (100) until the droplet (100) detaches under force of gravity, preferably with the following additional feature: c. the droplet formation surface (44) has an outer diameter of at least 1 mm and / or at most 3 mm, preferably an outer diameter of at least 1.5 mm and / or at most 2.5 mm.

7. Fluid dispenser (10) according to Claim 5 or 6 with the following further feature: a. the droplet formation surface (44) is delimited on the outside by a breakaway edge (46), wherein the breakaway edge (46) is formed with a curvature radius of more than 0.05 mm, in particular more than 0.1 mm.

8. Fluid dispenser (10) according to any of Claims 5 to 7 with the following further feature: a. the delivery structure (40) has on the outside an external widening region (50) which widens constantly in the delivery direction (2A), preferably with the following additional feature: b. an angle (B) between a surface of the external widening region (50) and the delivery direction (2A) is more than 20°, preferably more than 30°, in particular preferably more than 40°.

9. Fluid dispenser (10) according to any of Claims 5 to 8 with the following further feature: a. the delivery structure (40) has on the inside an internal widening region (52) which widens in the delivery direction (2A), preferably with the following further feature: b. an angle (B) between a surface of the external widening region (50) and the delivery direction (2A) is smaller than an angle (A) between a surface of the internal widening region (52) and the delivery direction (2A).

10. Fluid dispenser (10) according to any of Claims 5 to 9 with the following further features: a. the fluid dispenser (10) has a removable and refittable protective cap (60) which covers the delivery opening (30) when fitted, and b. the protective cap (60) has an inwardly pointing widening structure (62) which lies against an inside of the delivery structure (40) when the protective cap (60) is fitted, preferably with at least one of the following additional features: c. the protective cap (60) is formed as a screw cap, and / or d. the delivery structure (40) is held under elastic tension by the widening structure (62) when the protective cap (60) is fitted.

11. Fluid dispenser (10) according to any of Claims 5 to 10 with the following further feature: a. the delivery opening (30) and / or the delivery structure (40) has a shape deviating from rotational symmetry.

12. Fluid dispenser (10) according to any of Claims 5 to 11 with the following further feature: a. the fluid dispenser (10) is configured as a pump dispenser and has a manually actuatable pump device (16) with a pump chamber and with an inlet valve and an outlet valve, or b. the fluid dispenser (10) is configured as a squeeze bottle dispenser and has as a fluid dispenser a squeeze bottle which can be compressed manually for delivery purposes.

13. Fluid dispenser (10) according to any of Claims 5 to 12 with at least one of the following further features: a. the fluid store (12) is filled with a pharmaceutical fluid, and / or b. the fluid store (12) has an internal volume of less than 200 ml, in particular less than 100 ml.