DE202008018073U1 - Dispenser for a liquid - Google Patents

Abstract

Dispenser (1) for a liquid (7) comprising a tank (2) with a storage space (6) for the liquid (7) and a metering unit (3), characterized in that the metering unit (3) has a channel (11) , Which has an inlet (13) and an outlet (14), the channel (11) in its cross-sectional area (DK) over at least one longitudinal section through at least one metering element (DE; 12, 82) arranged in the channel (11) a gap (28) can be reduced.

Description

The invention relates to a dispenser for a liquid according to the preamble of claim 1.

From the WO 03/084362 A1 is a liquid media dispenser known. Such donors as they, for example, the local 5 In the case of low-viscosity media, such as, for example, penetrating oil or nail polish remover, the tendency is to lead to unwanted leakage.

The invention has for its object to develop a dispenser that is inexpensive to produce and reliably prevents leakage of larger quantities of the medium even with low viscosity media or liquids.

This object is achieved on the basis of the features of the preamble of claim 1 by the characterizing features of claim 1 or claim 16. In the dependent claims advantageous and expedient developments are given.

The liquid dispenser according to the invention provides a metering unit which has a channel which has an inlet and an outlet, wherein the channel can be reduced in its cross-sectional area (DK) to at least one gap on at least one longitudinal section through a metering element arranged in the channel , In such a dispenser adapted to the properties of the liquid gap is inexpensive to produce, since this is produced by two compared to the gap large-sized components. Such components can be produced with much less effort than a channel with an extremely small diameter. The core of the invention is thus a dispenser for low-viscosity liquids, which comprises a cost-effectively manufacturable micro-gap as a central component.

According to the invention, it is provided to seal the inlet of the channel with respect to a storage space through a membrane and to make the membrane permeable to the liquid from the storage space to the inlet of the channel. By pre-switching a simple membrane in front of the economically producible gap or the inlet of the gap, an undesirable leakage of the storage space can effectively prevent, since the membrane retains the liquid present in the storage space of the gap. Thus, the gap is supplied only with replenishment of liquid when a pressure is exerted on the liquid, which presses them through the membrane. The core idea of the membrane is thus a dispenser for low-viscosity liquids, which is sealed off by a membrane acting as a pressure-controlled valve with respect to the liquid present in the storage space as long as the liquid is not exerted by human or mechanical force on the wall of the tank increased pressure on the membrane becomes.

According to the invention, the membrane has a self-closing opening, which is formed by at least one slot. Such a membrane is inexpensive to produce. Furthermore, such a membrane can also be produced from materials which are resistant to aggressive liquids. Due to the thickness of the membrane and / or the slot length and / or the number of slots and / or intersecting slots this is easily adaptable to liquids of different properties and in particular different viscosity.

According to the invention, it is also provided to hold the membrane by a conical section of the metering element or a shoulder formed on the metering element against the base body in front of the inlet of the channel. This makes it possible to dispense with a separate fastening component for the membrane.

In particular, the invention provides mobility of the membrane on the metering element and in the longitudinal direction of the metering element. Movement in the direction of the channel is producible by increasing a pressure of the liquid. As a result, it is also possible to use rigid materials for the membrane, since this does not have to deform in order to open and close a gap in the region of the gap.

According to the invention it is provided to form the membrane with a resilient and peripheral edge web. With such an edge web can both achieve an effective seal against the body as well as realize sufficient spring properties.

According to the invention it is also provided to form the membrane of an elastically resilient sealing ring or O-ring and an annular disc. This allows a cost-effective production, since sealing rings in a variety of sizes are available as standard components and for the annular disc, a cost-effective material can be used, since this does not have to have any resilient or elastic properties.

Furthermore, the invention provides, the shell of the tank in at least a portion of flexible and thus depressible form, in order to increase a pressure in the storage space of the tank by a finger pressure. Such a tank is opposite a tank with mechanical or through Propellant driven pumping device or conveyor particularly inexpensive to produce.

According to the invention, it is provided to form a chamber between the membrane and the inlet of the channel. Such a pre-chamber allows bulging of individual lobes of the membrane in the direction of the channel and thus prevents unwanted sealing of the inlet of the channel through the membrane when the liquid is pressed out of the storage space.

The invention also provides for closeability of the outlet of the membrane. As a result, unwanted drying out or undesired odor nuisance by the dispenser can be effectively counteracted.

Furthermore, the invention provides to arrange an applicator at the outlet of the channel. This allows the dispenser to be optimized for a wide variety of applications.

The invention provides in particular to form the applicator as a nozzle. As a result, a precise application of the liquid is possible even in hard to reach places.

In particular, the invention also provides for the applicator to be designed as a brush element. By a brush element a targeted and even distribution of the liquid over a larger area is possible.

Furthermore, the invention provides to close the applicator by a lid. As a result, a drying or odor nuisance can be prevented by the applicator.

According to the invention, a cross-sectional area (DD) of the metering element and the cross-sectional area (DK) of the channel are formed at a common interface as congruent surfaces, wherein the cross-sectional area of the metering element is reduced by a recess and / or the cross-sectional area to form the gap for the liquid of the channel is increased by a recess in a base body in which the channel is formed. This results in a variety of design options for the channel and the metering. Thus, an optimal manufacturing process can be selected for each material used. At pin-shaped or cylindrical or disc-shaped metering elements made of plastic can be produced, for example, with simple means by reworking a flattening.

Furthermore, the invention provides that the dosing over its entire length has a constant cross-section and / or that the channel over its entire length has a constant cross-section. As a result, both components manufacturing technology are easy to produce.

One embodiment of the invention provides to close the inlet of the channel through a first end of a tube or a tube, wherein the tube or tube opens with a second end in the storage space of the tank. By shielding the inlet via a tube or a hose, it is possible to dose the liquid more sensitively.

Finally, the invention provides a brush element comprising a plurality of bristles and a clamp, wherein the bristles are guided in a U-shape through the annular clamp and point with their free ends in the same direction. Such a brush element can be easily mounted, since no free ends of the bristles point in the mounting direction and so damage to bristles during assembly is excluded.

The invention also provides for the metering needle or metering disk to be completely fixed within the channel between an inlet and an outlet of the channel, with the metering needle terminating, in particular, offset from the outlet of the channel. As a result, an undesired disassembly of the metering is difficult because this can not be grasped with a pair of pliers and as this is difficult to see and thus complicates the choice of a suitable procedure during assembly.

Further details of the invention are described in the drawing with reference to schematically illustrated embodiments.

Hereby shows:

1 a sectioned side view of a dispenser with the lid removed;

2 : a sectional side view of a dispenser with the lid on;

3 : an enlarged view of the in the 1 shown dosing unit;

4 : those in the 3 shown dosing unit with attached lid;

5a - 5c : schematic sectional view of the 4 ;

6 : a schematic representation of a pressed into a rectangular channel dispensing needle;

7 : a schematic representation of a pressed into a channel cuboid dispensing needle;

8th : a schematic representation of a pressed into a channel dispensing needle;

9 - 12 : sectional side views of a second to fifth embodiment of a dosing unit;

13 : a side view of the dispensing needle in the 12 shown fifth metering unit and a plan view of this dispensing needle;

14 - 16 : sectional side views of a sixth, seventh and eighth embodiment of a dosing unit;

17 : a detailed view from the 15 ;

18 . 19 FIG. 2 is a sectional side view of a ninth embodiment of a dosing unit with different positions of the membrane; FIG.

20 a side view of the dispensing needle of the ninth embodiment variant;

21 - 26 : Representations of a further embodiment variant;

27 - 28 a side view of a brush element with clamp in the pre-assembled state and in the installed state;

29 : a detailed view of a dispenser with a U-shaped brush element;

30 : a view of the from 29 known dispenser with lid;

31 a further embodiment of a donor;

32 - 35 an assembly procedure for mounting a variant of a brush element;

36 . 37 Two variants of a dosing unit shown in section;

38a . 38b : two detailed views of bristles for in the 36 and 37 shown dosage units;

39a - 39e : Dosing units with dosing needle and different applicators for non-refillable dispensers;

40a - 40e : Dosing units without dispensing needle and with different applicators for non-refillable dispensers;

41a - 41e : screw-on dosing units with dispensing needle and different applicators for refillable dispensers;

42a to 42e : screw-on dosing units without dispensing needle and with different applicators for refillable dispensers;

43 a sectional view of a one-piece dosing unit;

44 a sectional view of a multi-part dosing unit;

45 . 46 Two illustrations of a dispenser with a dosing unit for overhead application with a slider;

47 a sectional side view of a dosing with dosing and

48 : a two-piece dosing disc.

In the 1 is a donor 1 shown in a sectional side view. The donor 1 essentially comprises a bottle-shaped tank 2 and a dosing unit 3 , The dosing unit 3 is in a neck 4 of the tank 2 pressed. According to an embodiment not shown, it is also provided to screw the metering unit into the tank, wherein the tank and the metering unit are sealed against each other by a sealing ring. The Tank 2 encloses with a coat 5 or a wall 5 a storage room 6 , which with a liquid 7 such as nail polish remover or rust remover or cleaning fluid is filled.

In the 2 is the one in the 1 shown donors 1 shown again in the sectioned side view, wherein the dosing unit 3 through a lid 8th is closed, which is also over the neck 4 of the tank 2 extends. Through the cap designed as a cap 8th becomes an applicator 9 of the donor 1 protected against drying.

The 3 shows an enlarged view of the already from the 1 known dosing unit 3 of the donor 1 , The dosing unit 3 has a basic body 10 on which one channel 11 passes. This channel 11 is by a metering needle 12 trained metering DE almost completely closed. The channel 11 has an inlet 13 and an outlet 14 on. In the area of the inlet 13 is a membrane 15 arranged, which by a membrane holder 16 on the body 10 fixed is. Before the inlet 13 is through the membrane 15 and the main body 10 a chamber 17 educated. With the outlet 14 the channel opens 11 to the applicator 9 out. The applicator 9 is as a brush element 18 executed. The brush element 18 consists of a foot element 19 , bristles fastened in it 20 and a retaining ring 21 , The foot element 19 has a passage 22 on which the outlet 14 of the canal 11 opposite. Through the passage 22 become the bristles 20 of the brush element 18 over the canal 11 with liquid 7 out of the chamber 17 or the storage space of the donor, not shown here 1 provided. The membrane 15 is through a slot 23 severed. This slot 23 deforms into an opening 24 when the liquid is pressed from the storage space in an arrow direction x against the membrane (see also 1 ). A prevailing in the storage space pressure p can be achieved by compressing the elastic shell 5 of the tank 2 be increased (see also 1 ).

In the 4 are those in the 2 shown dosing unit 3 and their lid 8th shown enlarged. The lid 8th lies on the retaining ring 21 of the brush element 18 flat and thus forms with the retaining ring 21 an airtight room 25 for the bristles 20 , The storage space 6 of the tank 2 has a volume V6 of, for example, 25 ml. For the donor 1 In particular, tank volumes of 5 to 50 ml are provided.

In the 5a is schematically a section through the in the 3 shown basic body 10 shown, wherein the section corresponding to the in the 3 shown section line VV runs and the dispensing needle is not shown. The channel has a circular cross-sectional area DK and extends as a circular through hole 26 with a diameter D26 through the body 10 ,

In the 5b is schematically a section through the in the 3 shown dispensing needle 12 shown, wherein the section corresponding to the in the 3 shown section line VV runs and the main body is not shown. The dispensing needle has an approximately circular disk-shaped cross-sectional area DD. This has a flattening 27 on which parallel to a longitudinal axis L12 of the dispensing needle 12 over the entire length runs. Apart from the flattening 27 has the pin-shaped or cylindrical dispensing needle 12 a diameter D12.

In the 5c are now the main body 10 and the dispensing needle 12 shown in section along the section line VV. By the flattening 27 remains between the body 10 and the dispensing needle 12 A gap 28 through which the liquid is the main body 10 from an inlet of the channel 11 to an outlet of the canal 11 can flow through (see also 3 ). The diameter D26 of the through hole 26 or the channel 11 and the diameter D12 of the dispensing needle 12 are matched in terms of a frictional fit to each other to slipping out of the dispensing needle 12 from the channel 11 to prevent. A cross-sectional area F28 of the gap 28 and an extension of the flattening 27 in the longitudinal direction L12 of the dispensing needle 12 determine a fluid volume, which in a through the dispensing needle 12 and the channel 11 formed microchannel MK is included. The joining of the main body 10 and the dispensing needle 12 is done by pressing the dispensing needle 12 in the channel 11 of the basic body 10 so that the dispensing needle 12 permanent and immovable in the canal 11 is positioned.

In the 6 is a schematic representation of an embodiment of the 5c shown. A channel 11 is here by a cuboid, rectangular in cross section breakthrough 29 in a basic body 10 educated. The channel 11 is to reduce its cross-sectional area by a cuboid dispensing needle 12 closed, these being a broken edge 30 having. Through the broken edge 30 becomes a gap 28 created, through which the liquid in the direction of longitudinal axes L12 and L11 of the dispensing needle 12 or the channel 11 can go through. With side surfaces 12a to 12d is the dispensing needle 12 sealing on the body 10 at.

The 7 shows in reference to the 5c and 6 another embodiment. Analogous to 6 is a channel 11 in the main body 10 through a cuboid breakthrough 29 educated. This is through a longitudinal direction L11 of the channel 11 extending trough-shaped recess 31 increased. After pressing in a cuboid dispensing needle 12 in the channel 11 remains through the return 31 formed gap 28 , which one in the 7 has shown cross-sectional area F28. With side surfaces 12a to 12d is the dispensing needle 12 sealing on the body 10 at.

The 8th shows in reference to the 5c . 6 and 7 another embodiment. This corresponds to the formation of a channel 11 the Indian 7 shown embodiment. In addition to this is a cuboid dispensing needle 12 with a channel-shaped return 32 provided, which extends in a longitudinal direction L12 of the dispensing needle 12 extends. Together with a parallel trough-shaped recess 31 in a basic body 10 makes the return 32 a gap 28 through which the liquid is the main body 10 can flow through. With side surfaces 12a to 12d is the dispensing needle 12 sealing on the body 10 at.

The 9 shows a second embodiment of a metering unit 3 a donor 1 shown in a sectional side view. A basic body 10 also forms an applicator 9 , which as a nozzle 33 is executed. A membrane 15 is in a known manner by a membrane holder 16 on the body 10 attached, with the membrane holder 16 is designed annular.

In the 10 is a third embodiment of a dosing unit 3 shown in a sectional side view. The main body 10 carries an applicator designed as a separate component 9 , which as a nozzle 33 is executed.

In the 11 is a fourth embodiment of a dosing unit 3 shown in sectioned side view. Between a channel 11 and a membrane 15 is a chamber 17 educated. The chamber 17 has the geometry of a ball cap 34 in order to optimally bulge the slotted membrane with minimal chamber volume 15 to enable. As an applicator 9 the basic body carries 10 bristles 20 , which directly on the main body 10 are attached.

The 12 shows a fifth embodiment of a metering unit 3 in cut side view. A channel 11 does not just go through a body 10 , but also an applicator used in this 9 , which as a nozzle 33 is executed. The channel 11 is over its entire length LK through a dispensing needle 12 narrowed with a length LD. For a passage of a liquid, which by a user through the membrane 15 in a chamber 17 is pressed, there is a gap 28 available, which by a flattening 27 on the dispensing needle 12 is formed. The flattening 27 or the gap 28 run from an inlet 13 of the canal 11 to an outlet 14 of the canal 11 in the direction of a longitudinal axis LK or LD of the channel 11 or the dispensing needle 12

The 13 shows the from the 12 known dispensing needle 12 in a side view and in a plan view from an arrow XIII. The dispensing needle 12 has a diameter D12 = 2 mm. At the flattening 27 has the dispensing needle 12 only a diameter D27 of 1.9 mm. Accordingly, the channel has 11 (please refer 12 ) has a diameter D26 of about 2 mm. Thus, the gap points 28 a cross-sectional area F28 = 0.06 mm ² , wherein the surface F28 is perpendicular to the plane of the drawing and perpendicular to the longitudinal axis L11 (see 12 ). Calculated is the gap formed 28 comparable to a hole with a diameter of 0.28 mm. The invention provides cross-sectional areas F28 of the gap 28 which are smaller than 0.5 mm ² and especially smaller than 0.1 mm ² . Furthermore, the invention provides, the gap 28 in terms of its length L28 and its cross-sectional area F28 be interpreted as having a volume V28 which is less than 1 mm ³ and in particular less than 0.5 mm ³ . The in the 12 and 13 illustrated embodiment is according to the invention without the membrane 15 intended. This is the dosing unit 3 even cheaper to produce.

The 14 shows a sixth embodiment of a dosing unit 3 for a donor 1 in cut side view. In a canal 11 of a basic body 10 is a dispensing needle 12 held. The dispensing needle 12 stands with an end section 35 in a storage room 6 of the donor 1 into it. The end section 35 the dispensing needle 12 has a conical section 36 which turns into an inlet 13 of the canal 11 rejuvenated. Between the conical section 36 the dispensing needle 12 and the body 10 becomes a flexible membrane 15 held, with the dispensing needle 12 one in the membrane 15 executed drilling 37 penetrates. The membrane 15 is plate-shaped is located with a peripheral edge web 38 on the body 10 at. By increasing a pressure p a in the storage space 6 existing liquid 7 is the at the conical section 36 the dispensing needle 12 adjacent membrane 15 from the liquid 7 pressed in an arrow direction x and can pass through one between the conical section 36 and the membrane 15 opening annular gap 39 - in the presentation of the 14 is the gap 39 closed - in a chamber 17 penetration. With decreasing pressure p, the membrane moves 15 due to their elasticity and their bias in an arrow direction x 'back and then lies close to the conical section again 36 the dispensing needle 12 at. In this design of the dosing unit or the dispenser can be dispensed with a retaining ring for the membrane, since the holding function of the retaining ring is taken from the dispensing needle.

The 15 shows a seventh embodiment of a metering unit 3 for a donor 1 in cut side view. In a canal 11 of a basic body 10 is a dispensing needle 12 held. The dispensing needle 12 stands with an end section 35 in a storage room 6 of the donor 1 into it. The end section 35 the dispensing needle 12 has a conical section 36 which turns into an inlet 13 of the canal 11 rejuvenated. Between the conical section 36 the dispensing needle 12 and the body 10 becomes a membrane 15 held, with the dispensing needle 12 one in the membrane 15 executed drilling 37 penetrates. The membrane 15 is plate-shaped and lies with a peripheral edge web 38 on the body 10 at. The edge bridge 38 has resilient properties and an annular bottom 40 the membrane 15 behaves rigidly. By increasing a pressure p a in the storage space 6 existing liquid 7 the edge bridge cushions 38 the membrane 15 in an arrow direction x and the bottom 40 the membrane 15 moves on the conical section 36 the dispensing needle 12 also in the direction of the arrow x. This opens between the conical section 36 and the membrane 15 an annular gap 39 - in the presentation of the 15 is the gap 39 closed - and the liquid 7 can through this into a chamber 17 penetration. With decreasing pressure p, the membrane moves 15 due to the elasticity and the prestressing of its edge web 38 in an arrow direction x 'back and then lies again close to the conical section 36 the dispensing needle 12 at. In this design of the metering unit or the dispenser can also be dispensed with a retaining ring for the membrane, since the holding function of the retaining ring is taken from the dispensing needle.

The 16 shows an eighth embodiment of a metering unit 3 for a donor 1 in cut side view. Analogous to those in the 14 and 15 shown embodiments is in a channel 11 of a basic body 10 a dispensing needle 12 held with one end section 35 in a storage room 6 of the donor 1 stands in it. The end section 35 the dispensing needle 12 has a conical section 36 which turns into an inlet 13 of the canal 11 rejuvenated. Between the conical section 36 the dispensing needle 12 and the body 10 is a two-part membrane 15 held. The membrane 15 consists of an O-ring 41 and an annular disc 42 , By means of the O-ring 41 is the one on the main body 10 guided ring disk 42 resilient between the channel 11 and the conical section 36 the dispensing needle 12 trapped. By increasing a pressure p a in the storage space 6 existing liquid 7 becomes the O-ring 41 from the one in the main body 10 guided annular disc 42 squeezed and the washer 42 moves in an arrow direction x. This opens between the conical section 36 and the washer 42 an annular gap 39 - in the presentation of the 16 is the gap 39 closed - and the liquid 7 can through this into a chamber 17 penetration. As the pressure p decreases, the annular disc becomes 42 through the O-ring 41 or the rubber ring in a direction of arrow x 'pushed back and lies here again close to the conical section 36 the dispensing needle 12 at. One in the ring disk 42 executed drilling 37 is conical and attached to the conical section 36 the dispensing needle 12 adapted to obtain an effective seal through a large sealing surface.

In the 17 is the one in the 15 shown membrane 15 shown enlarged. Characteristic of the membrane 15 are the hole 37 for the passage of the dispensing needle and the annular peripheral edge web 38 through which the ground 40 the membrane 15 is cushioned against the body.

The 18 shows a ninth embodiment of a metering unit 3 for a donor 1 in cut side view. Analogous to those in the 14 . 15 and 16 shown embodiments is in a channel 11 of a basic body 10 a dispensing needle 12 held with one end section 35 in a storage room 6 of the donor 1 stands in it. The end section 35 the dispensing needle 12 has a first paragraph 43 and a second paragraph 44 on and tapers over the heels 44 . 43 to the channel 11 out. Furthermore, points the dispensing needle 12 at a tip 45 as a slotted mushroom cone 46 formed by which two latching hooks 47 . 48 are formed (see also 20 ). The mushroom cone 46 or the latching hooks 47 . 48 work with a paragraph 49 of the canal 11 together. This paragraph 49 is through an expansion 50 of the canal 11 formed, which in the area of an outlet 14 of the canal 11 is arranged. During assembly, the dispensing needle 12 in an arrow x in the channel 11 of the basic body 10 pushed in until the latching hooks 47 . 48 elastically rebound and the heel 49 spread. This is the dispensing needle 12 in the main body 10 anchored tensile strength. Between the second paragraph 44 the dispensing needle 12 and the body 10 is a two-part membrane 15 held. The membrane 15 consists of an O-ring 41 and an annular disc 42 , By means of the O-ring 41 is the one on the main body 10 guided ring disk 42 resilient between the channel 11 and the paragraph 44 the dispensing needle 12 trapped. By increasing a pressure p a in the storage space 6 existing liquid 7 becomes the O-ring 41 from the on the dispensing needle 12 guided annular disc 42 squeezed and the washer 42 moves in the direction of arrow x. During this movement, the annular disc dissolves 42 from the paragraph 44 the dispensing needle 12 , This allows the liquid 7 parallel to the arrows M and N between the ring disc 42 and the dispensing needle 12 in a chamber 17 penetration. From this chamber 17 out can the liquid 7 then through a gap 28 between the dispensing needle 12 and the body 10 in the channel 11 continue to flow. In the 19 is the ring disk 42 shown in a position in which the liquid 7 in the chamber 17 from the storage room 6 can flow in. When the pressure p on a floor 40 the annular disc 42 wears off again, then the ring disk 42 through the O-ring 41 pushed back in an arrow direction x 'and this puts again sealingly to the paragraph 42 the dispensing needle 12 at. The from the O-ring 41 and the washer 42 existing membrane 15 forms together with in the main body 10 held dispensing needle 12 a valve 51 , which results in an increase of the pressure p in the storage space 6 opens and closes again when the pressure drops. About a length L52 of a second section 52 the dispensing needle 12 which is between the two paragraphs 43 and 44 is the bias of the membrane 15 and thus indirectly also to open the valve 51 required pressure defined.

The 21 to 26 show an embodiment of a dispenser for a liquid. In this case, the membrane is replaced by a tube.

The dosage or flow rate is determined as in the previous Ausführungsbespielen by the vote of channel and dispensing needle. A leak of one drop is accepted because the bottle is additionally closed by a lid or a cap. The membrane is replaced by a tube, since the material required for the membrane is not suitable for every medium. For example, undesired swelling of the membrane may occur with certain media.

Description of the operation of the embodiment according to the 21 to 26 :
The 23 shows the bottle or the dispenser 1 with a tank 2 in a basic position. The inner, small tube R is filled. The 24 shows the bottle 1 in a middle position. The bottle 1 is pivoted about 100 degrees.

The 25 shows the bottle 1 in an application position. For example, when applying oil or nail polish.

By the vote of channel 11 and dispensing needle 12 , now occurs without squeezing the bottle 1 maximum one drop of a liquid 7 out. Now, by squeezing the bottle 1 with a force F1 (see 25 ) the air L in the bottle 1 Compressed by hand. Without the tube R, the piston diameter K1 would act on the liquid outlet. However, this is considerably too strong for the liquid 7 controlled by hand to dose. However, the effective piston diameter K2 of the tube R is considerably smaller. It is thus possible a manually controllable liquid outlet.

The 26 shows the bottle 1 with empty contents of the tube R. By the air pressure in the environment of the bottle 1 is now pushing air into the bottle 1 and thus creates a pressure equalization. By swinging the bottle 1 in the in the 23 shown basic position, the tube R is filled again.

The in the 21 to 26 shown donors 1 Characterized by a return brake or its soft start or the sensitive dosing of the liquid 7 or medium.

At a lower end ER of the tube R there is an O-ring 90 which can also be designed as a cap with bore. This prevents the panning process, a return of the liquid 7 in the remaining airspace of the bottle 1 , Due to the size of the inner diameter D90 of the O-ring 90 or the bore of the cap, the air pressure in the interior of the tube R builds up slower and allows even finer control of the liquid outlet. But here it comes down to the thin liquid of the medium 7 because the interior of the tube R then fills more slowly.

The floor 91 the bottle 1 has a depression 92 in the area of a free end ER of the tube R. This has the purpose of making the bottle 1 can also run completely empty. Depending on the medium 7 must be the depression 92 be made larger or smaller. According to an embodiment not shown, the invention also provides for the use of a tube instead of the use of the tube R.

The 27 shows another brush element 18 for a donor in a pre-assembly state. The brush element 18 includes a variety of bristles 20 and a clip 53 , The clip 53 is centered between free ends 20a and 20b the bristles 20 arranged. Through the bracket 53 become the bristles 20 held together and form a left tuft 54a and a right tuft 54b , To prepare for mounting the brush element 18 become the bristles 20 bent in a U-shape, with all the bristles after bending 20 with their free ends 20a respectively. 20b pointing in an arrow direction x (see 28 ). Subsequently, the thus prepared brush element 18 in an arrow direction x 'in a depression 55 of a basic body 10 a donor 1 pressed in (see 29 ). In the depression 55 a canal opens 11 with an outlet 14 , The depression 55 is as a cylindrical bore 56 educated. Opposite the representation of the 28 is the brush element 18 in the 29 shown rotated by 90 ° about a longitudinal axis L11. In this view is a nose 57 the annular clamp 53 recognizable. The clip 53 is with her nose 57 on the outlet 14 of the canal 11 aligned. The clip 53 is preferably made of a wire 58 bent, with ends of the wire 58 in the nose area 57 are merged. The brush element 18 is by means of a so-called interference fit through its clip 53 in the depression 55 held. The brush element 18 can be from the main body 10 be removed without destruction, for example, to equip the dispenser with another applicator. According to a not shown Variant, the brush element is subsequently welded or glued to the body to prevent unwanted disassembly for safety reasons. In the 30 is the one from the 29 known representation of a lid 8th added, under which the brush element 18 airtight and liquid-tight is enclosed. For this purpose is on the body 10 a sealing ring 59 attached.

In the 31 is another embodiment of a donor 1 shown in a cut side view. Such a donor 1 is in principle already out of the 21 to 26 known. especially the 25 shows a very similar representation. The Indian 31 shown donors 1 is in a pivoted position by 180 °, in which one in the dispenser 1 contained liquid 7 to be dispensed from a tube R. The tube R opens with an opening RO to a bottom B of a tank 2 of the donor 1 , As the tube R in the delivery of larger quantities of the liquid 7 empties and the discharge of the liquid 7 possibly without swiveling back the donor 1 to continue refilling the tube R via the opening RO, the tube R is in the vicinity of a metering unit 3 another inflow opening 60 on. Through the inflow opening 60 can the liquid 7 directly from a tube R surrounding storage space 6 of the tank 2 in a cavity 61 of the tube R. This makes it possible to deliver an amount of liquid which is larger than one in the cavity 61 of the tube R liquid amount, without a renewed swinging back and forth of the donor 1 to fill the tube R via the opening RO is required. The inflow opening 60 is as a bore 62 executed and has a diameter D62 = 1 mm. Such a metered inflow opening is suitable, for example, for low-viscosity oil.

The 32 to 35 show a sequence of an assembly of another brush element 18 for a donor 1 (please refer 35 ). The brush element 18 includes a variety of bristles 20 and a clip 53 , The clip 53 is midway between ends 20a and 20b the bristles 20 arranged. Through the bracket 53 become the bristles 20 held together and form two tufts 54a , Tufts 54b , To prepare for mounting the brush element 18 , which forms a brush insert, are the bristles 20 bent in a U-shape, with all the bristles after bending 20 with their ends 20a respectively. 20b in an arrow direction x 'have (see 32 ). The brush element 18 includes a socket 63 into which the bristles 20 in the 32 already at the clip 53 were threaded in an arrow direction x. The united tufts 54a and 54b the bristles 20 , which in an arrow direction x 'from the socket 63 stand out, are now from a thorn 64 against a lower collar 65 the socket 63 pressed (see 33 ). Then drives a sleeve 66 in the direction of the arrow x over the mandrel 64 and the socket 63 and bends the bristles 20 to a cylindrical outer wall 67 the socket 63 , The thus prepared brush element 18 which the bristles 20 and the socket 63 now includes after removing the mandrel 64 and the sleeve 66 in the direction of the arrow x '(see 34 ) in a basic body 10 of the donor 1 be pressed. Under an annular projection 68 of the basic body 10 becomes the brush element 18 kept restrained. Before or after the brush element is pressed in 18 into the main body 10 becomes the clip 53 remove and become the bristles 20 if necessary cut into shape. Opposite that from the 27 to 29 well-known brush element is that in the 35 shown brush element 35 easier to flow through from the same liquid, since all bristles in the flow area 20 are directed in the same direction. Furthermore, the brush element comprises 18 no clip after its completion 53 more, so that with respect to a compatibility with a liquid, the material of the clip 53 does not have to be considered. Such a brush element 18 is suitable for example for glue.

In the 36 and 37 are two variants of a dosing unit shown in section 3 a donor 1 shown. The dosing units 3 are each in a neck 4 a tank 2 held. The in the 36 shown dosing unit 3 points as an applicator 9 a brush element 18 on, its bristles 20 centrally through a retaining ring 21 to two tufts 20a . 20b are bound. In the 36 is just the tuft 20a shown. A single view of the applicator 9 (please refer 38b ) shows both tufts 20a . 20b , The applicator 9 sits in a depression 55 of the basic body 10 the dosing unit 3 , where the recess 55 as a conically tapered bore 69 is executed. The depression 55 has a depth T55 and is divided approximately into an upper third D55-1, a middle third D55-2 and a lower third D55-3, the lower third D55-3 into a channel 11 which passes through a dispensing needle 12 is narrowed. The applicator 9 is by means of the retaining ring 21 in the upper third D55-1 of the well 55 attached. Compared to the one in the 37 shown dosing unit 3 , which is constructed comparable, can be seen as an effective bristle length L20 by different positions of the retaining ring 21 in the upper third D55-1 and in the middle third D55-2 of the well 55 is variable. In the 38 is the one in the 36 and 37 shown applicator 9 shown in single view in the same view. The illustration already mentioned above 38b shows the in the 38a shown applicator 9 in a side view from the left.

All in the 39a to 39e shown in partial view donor 1 have a tank 2 on, its neck 4 outwards as a thread 70 is designed to allow the unscrewing of a lid, not shown, through which a in the neck 4 of the tank 2 Pressed dosing unit 3 can be covered. The dosing units 3 All five variants have in their channels 11 Dispensing 12 on. An applicator 9 in the 39a shown donors 1 is as a brush element 18 executed. The 39b to 39e show applicators 9 , which as a nozzle 71 Scraper 72 , Circle brush 73 and spatula 74 are executed. These four types of applicators are each used 75 designed, which also the channel 11 forms, in which the dispensing needle 12 is arranged. All five in the 39a to 39e shown embodiments are thus particularly suitable for low-viscosity liquids, such as nail polish or rust remover.

The description to the 39a to 39e also applies to the 40a to 40e to - in this respect, reference is made to the description there -, wherein the channels 11 the variants shown there are not narrowed by metering needles - as shown. Compared to those in the 39a to 39e The donors shown are those in the 40a to 40e shown donor 1 suitable for liquids, which are less fluid. According to an embodiment not shown are in the channels 11 Dispensing needles arranged, which produce one or more larger flow gaps.

The in the 41a to 41e shown donor 1 are comparable to those in the 39a to 39e executed donors, insofar reference is made to the description there. In contrast to these are the dosing units 3 in the 41a to 41e shown donor 1 - like in the 41d exemplified - each on a tank 2 screwed on and therefore easy to refill.

The in the 42a to 42e shown donor 1 are comparable to those in the 40a to 40e executed donors, insofar reference is made to the description there. In contrast to these are the dosing units 3 in the 42a to 42e shown donor 1 - like in the 42d exemplified - each on a tank 2 screwed on and therefore easy to refill.

The sectional view of the 43 shows a dosing unit 3 in which a basic body 10 and one as a nozzle 71 executed applicator 9 are made in one piece. For comparison is in the 44 again already from the 41b known dosing unit 3 represented, in which the basic body 10 and the nozzle 71 form two individual parts, which are pressed together.

The 45 and 46 show a further embodiment of a dispenser 1 , This embodiment is suitable for a so-called overhead dosing. In the 45 is the donor 1 shown in a dosing position DST for the so-called overhead dosing. The 46 shows the donor 1 in a refill position NST. Characteristic of the dosing position DST is that a dosing unit 3 of the donor 1 above a tank 2 of the donor 1 and one in the tank 2 located liquid 7 must be pushed upwards. According to the presentation of the 45 may be an upgrade of the liquid 7 to an applicator 9 through a through a dispensing needle 12 on a gap 28 tapered channel 11 only take place through a tube R, which with a first end RE1 to the channel 11 is connected and connected to a second end RE2 with an opening RO to a bottom B of the tank 2 opens. The dispensing needle 12 is in the channel 11 pressed and thereby in this between an inlet 13 and an outlet 14 fixed. By supplementing the dosing unit 3 through that to the dosing unit 3 belonging tubes R is a sensitive dosage possible. An overflow channel 76 , which in the flow direction SR before the dispensing needle 12 in the dosing unit 3 is arranged and the tank 2 with the channel 11 is in the dosing position DST for overhead dosing by a slider 77 closed, with the slider 77 as a ring 78 is formed and by a spring 79 against an annular shoulder 80 in front of the overflow channel 76 is pressed and closes this. In the metering position DST is a pressure p of a gas G, which is outside the tube R in the tank 2 by properly squeezing the tank 2 can not be increased so far that by the pressure p of the gas G, which also on an annular piston surface 81 of the piston acting as a piston 77 or rings 78 works, the slider 77 or the ring 78 in the flow direction SR against the spring 79 is liftable. This ensures that in the dosing DST no liquid 7 over the overflow channel 76 can enter or exit. To enable a quick and safe refilling of the tube R, the spring is 79 of the ring 78 so dimensioned that the ring 78 from that in the refill position NST when squeezing the tank 2 (please refer 46 ) on the piston surface 81 acting liquid 7 can be pushed down and the overflow 76 releases to during the manually increased pressure p in the tank 2 a subsequent flow of the liquid 7 from the tank 2 into the tube R through the overflow channel 76 to enable.

In the 47 is a sectional side view of a dosing unit 3 shown. A metering element DE is as metering 82 educated. The dosing disc 82 sits in a canal 11 and is in this between a sleeve 85 and one narrowing 86 or gradation held. Here are the dosing 82 and the sleeve 85 within the channel 11 between an inlet 13 and an outlet 14 of the canal 11 , To a wall 87 of the canal 11 hin hin the metering disk 82 a flattening 83 on, through which a gap 28 is formed for a passage of a thin liquid, not shown. The dosing disc 82 has a length LD and a diameter D12, where D12> = LD.

In the 48 is a variant of a dosing 82 shown in section. The dosing disc 82 consists of two interconnected discs 88 . 89 which have a different thermal expansion coefficient. The disks 88 . 89 For example, are designed as a plastic disc and metal disc and behave like a bimetal. By the use of such a two-part dosing 82 For example, the full functionality of the dispenser can be guaranteed even at very low temperatures. Both discs 88 . 89 have congruently positioned flats 83 on.

The invention is not limited to illustrated or described embodiments. Rather, it includes developments of the invention within the scope of the patent claims. In particular, the membrane or its components is made of rubber or plastic. If necessary, the membrane or the tube or the tube together with the dispensing needle form a pressure-controlled and self-closing valve, which is arranged as a barrier in front of a gap which leads the liquid to an applicator of the dispenser. In particular, the invention also provides to form the gap or the Mirkokanal by a trained in particular as a flattening or as a return deformation of the channel and / or the dispensing needle, the deformation in particular directly or in particular indirectly in the direction of a longitudinal axis of the channel or the dispensing needle runs. An indirect course of the deformation is in particular formed spirally or in particular running in a meandering manner. Furthermore, the invention provides that the channel and / or the dispensing needle or the metering disk have, in particular, at least one longitudinal section, in particular a continuous or step-like constriction or taper.

LIST OF REFERENCE NUMBERS

1

donor

2

tank

3

dosing

4

Neck of 2

5

Coat of 2

6

Storage space of 2

7

liquid

8th

cover

9

applicator

10

body

11

channel

12

Dispense

13

Admission of 11

14

Outlet of 11

15

membrane

16

membrane holder

17

chamber

18

Brush element as applicator

19

Foot element of 18

20

Bristles of 18

20a, 20b

tuft

21

Retaining ring of 18

22

Passage in 19

23

Slot in 15

24

opening

25

airtight room

26

Through Hole

27

Flattening 12

28

gap

29

Breakthrough through 10

30

edge

31

groove-shaped recess in 10

32

groove-shaped recess in 12

33

Nozzle as applicator

34

ball cap

35

End section of 12

36

conical section of 12

37

Bore in 12

38

Circumferential edge bar of 15

39

Gap between 12 and 15

40

Ground of 15

41

O-ring

42

washer

43

first paragraph 12

44

second paragraph 12

45

Tip of 12

46

Mushroom on 12

47

Latching hook on 12

48

Latching hook on 12

49

Paragraph 11

50

Expansion of 11

51

Valve

52

second part

53

clip

55

Deepening in 10

56

cylindrical bore

57

Nose of 53

58

wire

59

seal

60

inflow opening

61

Cavity in R

62

Hole in R

63

Rifle

64

mandrel

65

Collar of 63

66

shell

67

cylindrical outer wall of 63

68

annular projection of 10

69

drilling

70

Thread on 2

71

Nozzle as applicator

72

Scraper as applicator

73

Circular brush as applicator

74

Spatula as applicator

75

commitment

76

overflow

77

pusher

78

ring

79

Spring for 77 respectively. 78

80

Paragraph to support 77 respectively. 78

81

Piston area of 77 respectively. 78

82

metering

83

Flattening 82

84

Score on 82

85

shell

86

narrowing

87

wall

88

disc

89

disc

90

O-ring to ER from R

91

Ground of 2

92

Deepening in 91

12a-12d

Side surfaces of 12

20a, 20b

free ends of 20

54a, 54b

left or right tuft

B

Ground of 2

DE

metering

DK

Cross sectional area of 11

DD

Cross sectional area of 12

DST

metering position

D12

diameter of 12

D26

diameter of 26

D27

diameter of 12 at 27

D62

diameter of 62

D90

Inside diameter of 90

HE

lower end of R

F1

force

F28

area of 28

G

Gas in 2

K1, K2

Piston diameter 1 or 2

L

air

L20

effective length of 20

LD

length of 12

LK

length of 11

L11

Longitudinal axis of 11

L12

Longitudinal axis of 12

L28

length of 28

L52

length of 52

M

arrow

MK

microchannel

N

arrow

NST

refill position

p

Pressure in 6

R

tube

RE1, RE2

first or second end of R

RO

Opening of R opposite B

SR

flow direction

T55

Depth of 55

T55-1

upper third of 55

T55-1

middle third of 55

T55-1

lower third of 55

V6

Volume of 6

V28

Volume of 28

x

direction

x '

direction

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• WO 03/084362 A1 [0002]

Claims (30)

Donor ( 1 ) for a liquid ( 7 ) comprising a tank ( 2 ) with a memory space ( 6 ) for the liquid ( 7 ) and a dosing unit ( 3 ), characterized in that the dosing unit ( 3 ) a channel ( 11 ) having an inlet ( 13 ) and an outlet ( 14 ), wherein the channel ( 11 ) in its cross-sectional area (DK) on at least one length section through a in the channel (DK) 11 ) arranged dosing (DE; 12 . 82 ) on at least one gap ( 28 ) is reducible. Dispenser according to claim 1, characterized in that the inlet ( 13 ) of the channel ( 11 ) opposite the memory space ( 6 ) through a membrane ( 15 ) and wherein the membrane ( 15 ) of the liquid ( 7 ) from the memory space ( 6 ) to the inlet ( 13 ) of the channel is penetrable. Dispenser according to claim 2, characterized in that the membrane ( 15 ) one through at least one slot ( 23 ) self-closing opening ( 24 ) having. Dispenser according to claim 2 or 3, characterized in that the membrane ( 15 ) by a conical section ( 36 ) or a paragraph ( 44 ) of the metering element (DE) is held. Dispenser according to at least one of claims 2 to 5, characterized in that the membrane ( 15 ) in a longitudinal direction (LD) on the metering element (DE) by increasing a pressure (p) of the liquid ( 7 ) is movable. Dispenser according to at least one of claims 2 to 6, characterized in that the membrane ( 15 ) a resilient and circumferential edge web ( 38 ) having. Dispenser according to at least one of claims 2 to 6, characterized in that the membrane ( 15 ) from an O-ring ( 41 ) and an annular disc ( 42 ) is composed. Dispenser according to one of the preceding claims, characterized in that the tank ( 2 ) a coat ( 5 ) which can be pressed in at least in one partial area in order to produce a pressure (p) in the storage space ( 6 ) increase. Dispenser according to one of the preceding claims, characterized in that between the membrane ( 15 ) and the inlet ( 13 ) of the channel ( 11 ) a chamber ( 17 ) is trained. Dispenser according to one of the preceding claims, characterized in that the outlet ( 14 ) of the channel ( 11 ) is closable Dispenser according to one of the preceding claims, characterized in that the channel ( 11 ) with its outlet ( 14 ) in an applicator ( 9 ) opens. Dispenser according to claim 11, characterized in that the applicator ( 9 ) as a nozzle ( 33 ) is trained. Dispenser according to claim 11, characterized in that the applicator ( 9 ) as a brush element ( 18 ) is trained. Dispenser according to one of the preceding claims 11 to 13, characterized in that the applicator ( 9 ) through a lid ( 8th ) is closable. Dispenser according to one of the preceding claims, characterized in that a cross-sectional area (DD) of the metering element (DE) and the cross-sectional area (DK) of the channel (DE) 11 ) are formed on a common interface as congruent surfaces, wherein the formation of the gap ( 28 ) for the liquid ( 7 ) the cross-sectional area (DD) of the metering element (DE) by a return ( 32 ) and / or the cross-sectional area (DK) of the channel ( 11 ) by a return ( 31 ) in a basic body ( 10 ), in which the channel ( 11 ) is formed, is enlarged. Dispenser according to one of the preceding claims, characterized in that the metering element (DE) over a total length (LD) has a constant cross-section (DD) and / or that the channel ( 11 ) over a whole length (LK) has a constant cross-section (DK). Donor ( 1 ) according to one of the preceding claims, characterized in that the inlet ( 13 ) of the channel ( 11 ) via a tube (R) or a tube into the storage space ( 6 ) of the tank ( 2 ) opens. Dispenser according to Claim 17, characterized in that the tube (R) or the tube is located near a bottom (B) of the tank ( 2 ) and in particular one close to the dosing unit (FIG. 3 ) arranged inflow opening ( 60 ) having. Dispenser according to claim 17 or 18, characterized in that the dosing unit ( 3 ) at least one overflow channel ( 76 ), which the tank ( 2 ) with the channel ( 11 ), wherein the overflow channel ( 76 ) in particular in a flow direction (SR) before the metering element (DE) into the channel ( 11 ) opens. Dispenser according to claim 19, characterized in that the overflow channel ( 76 ) by a slider ( 77 ) is closable, wherein the slide ( 77 ) especially as a ring ( 78 ) is trained. Dispenser according to claim 20, characterized in that the slide ( 77 ) against the dosing unit ( 3 ) in particular by a spring ( 79 ) is cushioned and a particular annular piston surface ( 81 ), on which this at a compression of the flexible tank ( 2 ) through the in the tank ( 2 ) located liquid ( 7 ) and / or one in the tank ( 2 ) befindliches gas (G) can be acted upon. Dispenser according to one of the preceding claims 20 or 21, characterized in that the slide ( 77 ) against the spring ( 79 ) for the release of the overflow channel ( 76 ) by an increase in the tank ( 2 ) prevailing pressure (p) in particular in a refill position (NST), in which the piston surface ( 81 ) with the liquid ( 7 ) is covered by the liquid ( 7 ) is displaceable in the flow direction (SR). Dispenser according to claim 13, characterized in that the brush element ( 18 ) a plurality of bristles ( 20 ) and a bracket ( 53 ), wherein the bristles ( 20 ) in the area of the bracket ( 53 ) are bent in a U-shape and with free ends ( 20a . 20b ) in the same direction (x). Dispenser according to claim 13, characterized in that the brush element ( 18 ) a plurality of bristles ( 20 ) and a socket ( 63 ), wherein the bristles ( 20 ) through the bushing ( 20 ) and in particular on an outer wall ( 67 ) of the socket ( 63 ) issue. Dispenser according to one of the preceding claims, characterized in that the metering element (DE) as dispensing needle ( 12 ), wherein a length (LD) of the dispensing needle ( 12 ) is greater than a diameter (D12) of the dispensing needle ( 12 ). Dispenser according to one of the preceding claims 1 to 24, characterized in that the metering element (DE) as metering disc (DE) 82 ), wherein a length (LD) of the metering disk ( 82 ) smaller than or equal to a diameter (D12) of the metering disk ( 82 ). Dispenser according to claim 26, characterized in that the metering disc ( 82 ) of two interconnected slices ( 88 . 89 ) is formed with different thermal expansion coefficient. Dispenser according to one of the preceding claims, characterized in that the dispensing needle ( 12 ) or the dosing disc ( 82 ) between an inlet ( 13 ) and an outlet ( 14 ) of the channel ( 11 ) in the channel ( 11 ) is arranged. Dispenser according to one of the preceding claims, characterized in that the dispensing needle ( 12 ) opposite the outlet ( 14 ) of the channel ( 11 ) ends back. Dispenser according to one of the preceding claims, characterized in that the dispensing needle ( 12 ) from the inlet ( 13 ) of the channel ( 11 ) into the memory space ( 6 ) of the tank ( 2 ) of the donor ( 1 protruding).

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