EP0815946A2 - Dispenser for products - Google Patents

Abstract

The discharge device for especially fluids, has a first device (2) and a second device that is a manually movable discharge control (3). The first component has a stock (12), a pump (6), and a chamber, and the second chamber has a stock (13), with an outlet (17) and a material guide (20). The job of the material outlets is to position the orifices over the shutter device (22). The device is made safe with a transfer back=up device (50). The transfer back=up device may grip onto the back of another safety rail (50,51), and the first device, without the second one, can then discharge the materials under pressure. Both parts of the machine may be connected to each other via a plug and socket joint.

Description

The invention relates to a media dispenser. With him can Media distributed or dispensed through a media outlet will. The medium can make its last touch with the donor at this media outlet. Such Dispensers expediently have a media or fluid guide on, which by separate guides, such as channels or the like, can be formed. In contrast to essential extended media rooms, they can be much narrower media rooms form. The other media rooms can be used for storage of the medium, as pressure rooms for generating a discharge pressure or the like may be provided. A media tour they can be connected to the input and / or the output. These serve to fill or empty the media room the operation of the dispenser.

The fluid guidance is expediently separate from the media guidance intended. In case of pressure equalization one Media room can do it contrary to media management be flowed through. The fluid, like atmospheric air, flows into the media room if it is emptied, Temperature changes or the like come under negative pressure is. This supply of the fluid can easily lead to contamination of the medium. Such ventilation guides are running therefore only useful through a germ filter or the like, to make the air in the flow sterile.

Nevertheless, also in the area of the media outlet Germs along the media guide into the device, possibly up to penetrate into the media rooms. This leads to contamination and therefore to spoil the medium and make it unusable of the donor. You can do that with closures in the area counteract the media outlet. They are suitable in Closed state to form a germ barrier.

Accordingly, the invention is based on the object To create a dispenser or a discharge device in which Disadvantages of known training or use either only a germ barrier at the media outlet or a germ barrier in the fluid guidance are avoided and in particular at simple construction very safe combination functions of the Lock has.

According to the invention is therefore both a germ barrier for the Outlet and a germ barrier are provided for the fluid guide. Instructs the donor to operate a media discharge two mutually movable units on or if it consists of two such units, one is a lock expediently on one and the other lock on the other Unit stored or held. The two locks lead with the discharge operation and to this synchronous mutual Movements.

The media outlet, especially an atomizer nozzle, is expediently through the outer end of a short nozzle channel educated. The inner end of the nozzle channel can immediately connect to a conical or similar extension. The The nozzle expediently forms the closing surface of the associated one Lock. A movable closure member can be on this closing surface in the closed position. The two closing surfaces expediently lie only in a line or ring shape. This results in extremely small creepage distances for Germs. High closing and surface pressures can be achieved. Despite the non-resilient closing surfaces, a very tight seal guaranteed. The nozzle channel forms with its end the media outlet and is limited in one piece. Upstream of the closing surface, the nozzle channel can be like the movable closure member of the lock one or more times be expanded in stages. So the closure member can immediately in this nozzle channel only over an axial section its opening or closing movement be slidably guided. The sliding and resting surfaces can be in Form an additional germ barrier. This lock immediately adjoins the axially abutting ones Closing surfaces upstream. This lock only gives way a first partial path of the opening stroke of the closure member free passage for the medium.

During the closing movement, the closure member abuts as a pump piston the medium from the nozzle channel through the media outlet impulsively. So the nozzle channel between the end of the Locking piston and the media outlet due to the inertia of the accelerated medium completely emptied. The residual medium located there is atomized outdoors ejected.

The germ barrier for the fluid guidance could, according to the DE-OS 35 03 354 be trained on the because of other features and effects for inclusion in the present application Reference is made. This lock can also be useful the German patent application 196 10 457.2 trained to which express reference is made for the same reasons is taken.

The two actuating units to be moved against each other are conveniently provided with a pull-off protection to a to further protect against the ingress of germs. The Securing prevents or makes it difficult to pull apart sufficient for both units. A securing member is advantageous securing this with a socket, like a Crimean ring, formed, which surrounds other components or on this is set. From the upstream end of the socket the fuse is removed. The securing member can on The outer circumference of the frame is or at a distance from it Outer circumference to be effective. It is particularly easy manufacture if it is by bending or flanging the End of the version is formed. This consists of one relatively soft, e.g. metallic, material. By the pull-off protection can block germs in the connection between units, e.g. on a piston rod, not opened accidentally.

It is also advantageous if this version with its inner circumference fluid guidance is limited. So the related one Germ block completely enclosed within the socket lie. Fluid inlets can be spaced axially be limited by the version. You can on one or both ends of the socket within a housing of the actuation unit lying, which has the media outlet.

With regard to the training of the donor or the respective Lock or the respective closure is further on following documents to include the characteristics and effects referred to the present application: DE-OS 33 15 334, DE-OS 41 10 302, DE-OS 41 10 304, DE-OS 44 03 755, DE-OS 44 41 263, German patent applications 196 06 701.4, 196 06 702.2, 196 06 703.0, 196 05 153.3 as well DE-OS 44 17 488 and DE-OS 44 03 755.

A particularly good atomization and a very effective one The nozzle channel is emptied when the media pump, for example a thrust piston pump, another one second pump stage, in particular a bellows pump, connected downstream is. The medium is in it after leaving the medium pump accelerated again by narrowing the pressure chamber. The pressure rooms the media pump and the additional pump stage narrowed simultaneously. The jacket of the pressure chamber of the pump stage can form a return spring. For example for the Germ lock or the closure of the media outlet. The Pressure chamber of this pump stage or the associated end of the Return spring can be directly or in one piece on one Connect the control piston of the outlet lock. So results a very compact design. These components as well as the Bracket for the return spring or the like can in essentially completely within a discharge nozzle lie. At its upstream end protrude its outer circumference transverse surfaces for manual pressure actuation of the donor. The socket is for insertion into a Body opening, such as a nostril, suitable.

These and other features go beyond the claims also from the description and the drawings, wherein the individual features individually or separately several in the form of sub-combinations in one embodiment of the invention and in other fields be advantageous and self-protective Can represent designs for which protection is claimed here becomes.

The division of the application into individual sections as well Inter-headings limit those made under them Statements are not generally applicable.

Brief description of the drawings

Fig.1

ein Spender im Axialschnitt,

Fig. 2

eine weitere Ausführungsform eines Spenders,

Fig. 3

eine weitere Ausführungsform des Verschlußorganes,

Fig. 4

einen Baukörper der Spender nach den Fig. 2 und 3 in Ansicht,

Fig. 5

einen Ausschnitt der Fig. 1 bis 3 in vergrößerter Darstellung,

Fig. 6

eine weitere Ausführungsform eines Spenders in perspektivischer und winkelförmig aufgeschnittener Darstellung einzelner Bauteile sowie

Fig. 7

einen Bauteil des Spenders gemäß Fig. 6 in teilweise geschnittener Radialansicht

Embodiments of the invention are shown in the drawings and are explained in more detail below. The drawings show:

Fig. 1

a donor in axial section,

Fig. 2

another embodiment of a donor,

Fig. 3

another embodiment of the closure member,

Fig. 4

2 shows a structure of the dispenser according to FIGS. 2 and 3,

Fig. 5

2 shows a detail of FIGS. 1 to 3 in an enlarged representation,

Fig. 6

a further embodiment of a dispenser in a perspective and angular cut open representation of individual components and

Fig. 7

a component of the dispenser according to FIG. 6 in a partially sectioned radial view

The device 1 has two units 2, 3. You are for Discharge actuation while shortening the dispenser 1 axially movable against each other. When released by the actuating force return them in the opposite direction by a spring Starting position according to FIG. 1 back. Unit 2 contains a bottle-shaped storage 4 with a narrowed storage neck 5. A thrust piston pump 6 is inserted axially into it. It draws the medium from the storage belly. The Pump 6 protrudes only partially, but with most of it Length in the rigid storage 4. At the forehead and End face of the neck 5 is the pump 6 with a radial projecting annular flange 7 pressure-tight and biased supported with the interposition of a seal 8. For axial preload and as protection of the fixed connection a socket 9 is provided between the reservoir 4 and the pump 6, namely a Crimean ring made of soft sheet metal. All mentioned components lie in a common axis 10.

The pump 6 has an actuating plunger 11 which is made of their main body, namely the pump housing 12, outside of the memory 4 protrudes axially. With the plunger 11 is the Unit 3 fixedly connected. The link 11 carries within the housing 12 a pump piston. It limits a pump or Pressure chamber on one end. The actuation movement narrows the pressure chamber and the medium contained therein ejected into the unit 3 through the inside of the plunger 11. Within the housing 12, a pressure or path dependent opening and closing exhaust valve provided be, for example on the displaceable piston unit. Only after reaching a predetermined pressure in the The pump chamber therefore flows out the medium in the outlet direction. However, the outlet port of the pump can also be from the pump chamber to the outlet of the pump, which is in the end face of the Ram 11 is always open without a valve. At the Return stroke of the pump is through the end lying in the memory 4 of the housing 12 or a suction hose medium in the Pump chamber sucked in, via an inlet valve, the closes during the pump stroke. The bodies 4, 8, 9, 12 form in Operation of a rigid and pre-assembled unit. To this Unit is unit 3 only by one up to a stop position sufficient axial movement.

The unit 3 has a one-piece base body 13. He engages with a housing 14 and / or a nozzle 15 which Parts 5 to 9, 11, 12 in every position on the outer circumference partially or completely. The cap-shaped housing 14 has a jacket protruding freely against the outlet direction on. The jacket surrounds the parts mentioned. He can on The outer circumference of the socket 9 is guided radially with radial play be. At a distance from the end of the housing 12 that is outside of the memory 4 is located and has this end opposite the housing 14 has an end wall that is directly connected to the Cap jacket and only connects radially inwards. About the The cap jacket does not protrude from the outside of this end wall. This outside forms on both sides adjacent to or around the Stub 15 a shoulder or handle 16 to support the The user's fingers when pressed. Whose thumb can then e.g. supported on the distant bottom of the memory 4 be. This allows the dispenser 1 with a single Hand carried and operated at the same time. The stub 15 is longer than the housing 14 and in the outer width reduces and closes in one piece on the end wall of the cap of the housing 14. The nozzle 15 is at its free The end tapers and forms the free end face Media outlet 17. The medium loosens at the discharge completely from donor 1. Inside the housing 14 and the connector 15 is a pressure-tight coupling 18th intended. It serves the axially fixed, but mutually rotatable connection between the unit 3 and the plunger 11 of the piston unit. The clutch 18 forms during the pump stroke immediately after leaving the starting position only connection between units 2, 3 as well as one Lock against the ingress of germs into the media management. Each of the parts 13 to 18 can also lie in the axis 10.

The dispenser 1 is for dispensing liquid, powdery, pasty, gaseous or similar media. The With the discharge as a cosmetic, pharmaceutical, technical or similar active ingredient applied will. For recording and channeling the medium in the Discharge and refilling are provided for media rooms. she are through the storage space 19 of the memory 4, the pump chamber and all those spaces are formed whose boundaries come into contact with the medium during operation.

These media spaces form from the pump chamber to the outlet 17 a media guide 20 in the form of adjoining Channel sections. These are opposite the storage space and the pump chamber is narrowed in cross section and lie within unit 3. In addition, one is from the leadership 20 separate fluid guide 21 is provided. The leadership 21 here forms a channel connection between the storage space 19 and the atmospheric air, which the device 1 outside surrounds. The duct connection is connected to room 19, bypassing the inside of the housing 12 and through the opening of the neck 5 and within the socket 9. The fluid here is therefore air, but could be different Be fluid. It should be suitable for deviations of the Pressure in room 19 compared to atmospheric pressure balance. Such deviations arise as negative pressure especially if with the dosing pump 6 from the Room 19 a further discharge volume into the pumping chamber inside has been sucked in for a short time. After that, this one Negative pressure over several times longer again increased by air through the unit 3 and the guide 21 flows strongly throttled through.

In the area of the outlet 17 or through it A germ barrier 22 is provided on the end wall. It prevents at rest of the device 1 that germs in the atmospheric Air is contained or at the end of the neck 15 in the area of the outlet 17, inwards the guide 20 can penetrate. The lock 22 is as mechanical Lock or formed as a channel closure. The barrier 22 is during the exit of the medium from the outlet 17th open. The lock 22 closes at the end of this exit immediately again. A similarly effective germ barrier 23 is for the guide 21 is provided, but only acts as a germ filter. The lock 23 lies between the flange 7 and the end of the Neck 5 completely inside the socket 9 and the cap 14, in a ring area around the axis 10 and around Housing 12. On its outer circumference, the lock 23 closes tight to the neck end and pressure-tight.

A control body or slide 24 is completely within of the tubular stub 15 and axially with respect to this only Slidably arranged over a few tenths of a millimeter. Of the Slider 24 is in its initial and closed positions stop-limited and lies in the axis 10. The outlet 17 facing end of the slide 24, the rigid and one-piece is, forms a cylindrical valve member 25 with Axis 10 continuously rectangular end surface. The Member 25 has compared to all other areas of the slide 24 smallest diameter. The length of the link 25 is at most as large as its outside width. The link 25 closes via a flat ring shoulder on an enlarged mandrel 26 of the slide 24 on. The mandrel 26 connects to an actuator, namely to a control piston 27, at an axial distance from Link 25 and in the area of the outer half of the length of the Stutzen 15. The cup-shaped piston 27 has a jacket-shaped Piston lip, which in the outlet direction over a ring-shaped piston crown protrudes freely. The lip slides sealed on the inner circumference of the control cylinder. The Lip bounded with the outer circumference of the mandrel 26 about the axis 10 an annulus. Upstream of it connects to the Piston bottom a portion of the mandrel 26, which is opposite to the downstream section is expanded. This Section is with an annular, piston-like seal 28 slidably guided on an inner circumference of the guide 20. The seal 28 is a piston lip against the outlet direction free before. The thorn section, which is upstream over the Gasket 28 protrudes over its entire length by one Channel 31 of the guide 20 penetrates. The channel 31 penetrates also the piston crown. So it opens into the annulus, which from Piston 27 is limited. The channel 31 is from the piston crown to to seal 28 over the entire circumference of slide 24 limited. The channel 31 is upstream of the seal 28 open on the long side or on the outer circumference of the slide 24. In this area, the slide 24 is from a reset or Surround valve spring 29. The spring 29 is with her upstream end rigidly on unit 3 and with its downstream end inside the seal 28 supported on the slide 24. The coil spring 29 is loaded the slide 24, the parts 25 to 28 in one piece are trained for the closed position. The spring 29 holds that Link 25 in the closed position under tension.

In the nozzle 15 is from the upstream, open End of the unit 3 or the housing 14 rigidly in position 30 used completely within the body 13 lies. The body 30 is only on the inner circumference of the outermost Cover 32 of the nozzle 15 attached. The body points to this 30 a widest jacket or section 33. The section 33 engages in connection with the housing 14 axially with limited stops in the inner circumference of the jacket 32, and only over a partial length of the nozzle 15. This inner circumference also forms the raceway for the piston 27. To the Sheath 33 closes a section or Sheath 34 of the body 30 protrudes freely. The coat 34 is non-contact compared to the jacket 32. The coat 34 is a short distance from the bottom of the piston 27 and surrounds the associated section of the mandrel 26, the channel 31 and the Spring 29. The latter is within the end wall of the section 33 supported directly on the body 30. On the inner circumference of the jacket 34, the seal 28 is slidably guided. Of the Body 30 forms a coupling member 35 of the coupling 18. Das Link 35 is sleeve-shaped and lies within with a radial distance of the jacket 33. The member 35 surrounds closely and axially struck the end portion of the ram 11. Link 35 establishes the connection between units 2, 3 and delimits the section of the guide 20 which is connected to the tappet 11 connects.

Between the links 33, 35, which are sleeve-shaped one inside the other lie, an annulus is limited, which to the inside of the Housing 14 and the guide 21 is connected. This Annulus is connected via a channel 36 to that annulus, in which the pistons 27, 28 are located and the Inner circumference of the jacket 32 and from the outer circumference of the jacket 34 is limited. The axial and narrow channel 36 forms the only external connection to this annulus. The annulus will not flowed through by the medium. Changes in position of the slide 24 therefore do not lead to significant pressure changes in this annulus.

In the area of the transition between the links 25, 26 is a swirling or swirling device 37 is provided. she displaces medium that along the outer circumference of the mandrel 26th flows in the outlet direction, in a rotational flow around the Axis of outlet 17 and link 25. This swirl flow continues to discharge to outlet 17. Of the right-angled, sharp ring edge between peripheral surface and end face of link 25 is within the End wall 43 of the nozzle 15 an annular valve seat 38 assigned. At the seat 38 is the ring edge, which serves as a closing surface is provided in the closed position only under tension the compression spring 29.

The outlet 17 is cylindrical through the outer end Channel 39 formed. The channel 39 can be sharp-edged to the Connect the outer end face of the end wall 43, namely in Area of a depression in this end face. So results a sharp tear-off edge for the atomized detachment of the Medium at the outlet 17. The length of the nozzle channel 39 is at most as large as its diameter, less than four Is one tenth or one tenth of a millimeter. This length can also be smaller than half this diameter.

Channel section 40 closes at the inner end of channel 39 that is flared upstream. The extended The end of the channel 40 connects directly upstream a cylindrical channel section. On this cylinder the link 25 slides sealed with its outer circumference. Of the The transition of the cylinder to section 40 forms the seat 38. The cylinder is opposite to its diameter or half its diameter is shorter. It closes with its upstream lying end to a flared channel section 41 on. The channel 41 surrounds the link 25 in each Position on the outer circumference and is penetrated by this link 25.

The conical section 41 lies within an annular one Projection 42, which over the inner end face of the end wall 43 protrudes freely. The upstream face of the Ring 42 is in the closed position with a small gap distance from the end face between the links 25, 26. So the Closed position on seat 38 is not hindered. The swirl device 37 can be formed by a recess or profiles be and is in the shoulder area between the limbs 25, 26 provided. The recess can on the outer circumference of the Connect the mandrel 26 and the medium in a swirl flow to the Submit section 41.

The outer diameter of the link 25 is at most four or three times the diameter of the nozzle opening 17 and at most half the outer diameter of the next one Mandrel section 26. Along the outer circumference of this Mandrel section 26, channels 44 of the guide 20 are provided. The channels 44 are from the inner circumference of the jacket 32 and from the outer peripheries of sections 26, 42 limited. Therefore are the channels 44 permanently to the extension 41 and the Device 37 connected.

The longitudinal channels 44 connect the inner annular space of the piston 27 with the valve seat 38. The closing surfaces of the valve 22 have only line contact with each other. The closing surfaces are continued until expansion 41, namely through the upstream cylindrical sealing surfaces. The channels 44 can by grooves on the inner circumference of the jacket 32 be formed. They sit in a ring Tab 45 continues. It is freely upstream the annulus or piston 27 before. This also results here relatively narrow flow cross-sections. These cross sections remain narrow until outlet 17. The cross sections are much smaller than the flow cross-sections of the channel 31 or the link 35. The mandrel section 26 can be on its Outer circumference with a flattening reaching up to limb 25, with recesses 47 or spaced from the link 25 Like. Provided. So the turbulence of the medium is Flow still improved.

The one-piece Krimpring 9 has two adjoining Longitudinal sections 48, 49 on the different widths to have. The sections 48, 49 are annular in shape End wall joined together. How to have this wall the sections 48, 49 consistently constant wall thickness. The expanded, cap-shaped portion 48 serves to To clamp flange 7 against the end face of the neck 5. This end face can by an axial ring projection Neck end be formed and immediately adjoins the Inner circumference of the neck 5. Section 48 lies with its end wall on the annular end face of the flange 7 on. With an inward angled end collar section 48 on a shoulder surface facing away from it the outer circumference of the neck 5. On the right in Fig. 1 is the fully assembled, crimped and axially secured position shown and the left in Fig. 1 the situation before crimping and after the ring 9 is placed upstream.

In this position, the inner circumference of section 48 lies with small distance from the outer circumference of a radially outward protruding collar of the neck 5. The collar forms the Shoulder surface for the Krimpring 9. Section 49, which downstream to the inner circumference of the end wall of the section 48 connects and is cylindrical, surrounds the part of the Housing 12, which extends outward from the neck 5 via the flange 9 protrudes. This part is through a separate housing cover of the housing 12 formed, which is arranged in a fixed position and is pushed through by the plunger 11.

Section 49 surrounds this housing cover up to its end surface penetrated by the plunger 11 closely on the outer circumference, however not sealed. So is the guide 21 from the inner circumference of section 49 and the outer circumference of this housing section bounded in a column. Also from the outer circumference of the Neck collar and the inner circumference of section 48 can Guide 21 may be delimited in the form of a gap. So can of both Ends of the Krimpringes 9 forth air in the expanded annulus occur, the components 7, 8 receives. From there the air only enters the room through the barrier 23 19th

The units 2, 3 and the germ barrier of the clutch 18 are secured with a device 50 against it, against the direction of actuation pulled apart and thereby apart to be solved. The pull-off protection 50 lies completely inside the unit 3 and the housing 14, upstream at a distance from the end wall of the cap. The fuse 50 lies on the outer circumference of the protruding cover of the Housing 12 and approximately in the middle between the flange 7 and the cap end wall of the housing 14. A securing member 51 is formed by the Crimean ring, namely that downstream lying end of section 49. This end is in cross section hook-shaped or conical radial over more than 90 ° angled outwards. Therefore, the link 51 is above the Outer periphery of the cylindrical portion 49 in front. A counterpart 52 is formed in one piece with the base body 13. The link 52 is radially resiliently movable or resilient expandable. In this way, the cam 52 engages behind the dimensionally stable Link 51. Link 52 is also a short distance from Outer circumference of section 49. When pumping can the link 52 axially displaced along this outer circumference will. The link 52 separates from the link 51. The Link 52 is on the inner periphery of the free end of a projection 53 or jacket arranged. The projection 53 is within the cap shell 14 and with a radial distance of This is less far from the inside of the end wall of the cap before than the cap coat. Link 53 may be one or more Have axial slots to better spring.

When the unit 3 is placed on the unit 2, the annular snap cams 52 on the continuously annular Link 51 on. As a result, the cam 52 is against the spring force of the jacket 53 expanded until it is completely on the link 51 has been moved past and then the cam 52 springs in his security position back. When applying a very large one The fuse 50 can correspondingly pull the units 2, 3 the other way around, spring out. So the units 2, 3 are separated from each other. The mutual Installation of the links 51, 52 in the starting position is not tight. This allows air to pass between them and form them also limits of the guide 21.

The lock 23 or the seal 8 contains an annular Germ filter 54. The filter 54 is located directly on the End surface of the neck 5 and on the outer circumference of the housing 12 with axial or radial preload. The filter 54 is disc-shaped and the neck 5 is made of glass. The filter 54 can be made from e.g. semipermeable, porous Material. The filter 54 leaves towards the room 19 Slowly blow through. In the opposite direction, the However, filter 54 does not penetrate medium from room 19.

Therefore, filter 54 serves as a media seal, but not as a fluid seal. The air penetrates from the room within the section 48 in the end face and the peripheral surface of the Filters 54 a. Then the air flows inside the filter 54 radially inwards and then between the neck 5 and the Housing 12 on the associated end face of the filter 54 in the space 19. On the outer end face of the filter 54 can between this and the flange 7 another ring or disk-shaped seal 55 may be provided. The outside diameter the seal 55 is advantageously smaller than the outer diameter of the filter 54. The seal 55 is impermeable to air. The filter 54 can also immediately and rest on flange 7 without additional seal 55.

function

To operate the unit 3 with your fingers, the press on both sides of the connector 15 on the handle 16, over pushed a pump stroke further over the unit 2. Thereby constricts the pumping chamber. The associated exhaust valve is after opened a first partial stroke and the medium from the pump chamber pressed through the channel in the plunger 11 into the guide 20. From here, the medium flows through the axis 10 Link 35, the spring 29 and the channel 31 to the downstream lying end face of the piston 27 and in the associated Annulus. This creates an overpressure here.

When a limit pressure is reached, the one-piece unit 24 pressed upstream against the force of the spring 29 without to strike at the end of the jacket 34. This will make the valve member 25 lifted off the seat 38 until its closing edge is free lies within extension 41. The medium can now successively through the channels 44 along the profiles 47 and 37 flow into the channel section 41. In the channel 41 the medium flows along the outer circumference of the link 25 with increasing flow velocity because of the Section 41 the flow cross-sections in the flow direction lose weight.

The closing edge of the link 25 forms with the section 41 and the adjoining cylindrical channel section a ring nozzle. The medium is pre-atomized in it. Then the medium flows along the cylindrical channel section in section 40. In section 40 increases due to the narrowing the flow rate again. This in Swirl flow medium then enters the nozzle channel 39 a. This is resolved by repeated, finer atomization Medium from the boundary edge of the outlet 17 as a spray cone from. All channel sections 39 to 41 and the one in between lying cylindrical channel sections are together in one piece limited. These sections lie within the end wall 43. Their common length can be an inside width of the section 41 correspond.

As soon as the pressure in the pumping chamber or rooms 19, 20 has dropped sufficiently, the control part 34 returns with the Link 25 in the outlet direction back to its closed position. The Link 25 penetrates abruptly into the cylindrical channel section a. The closing edge forms with the narrower end edge of section 41 a valve control edge. So is with Reaching this end edge of the downstream channel part opposite the upstream channel part 41, 44, 31 tightly closed, before the seat 38 is reached. The link 25 now acts as an ejection piston. The piston 25 pushes the medium from the cylindrical channel section and the Sections 40, 39, also under atomization, completely out. Namely until the closing edge under high surface pressure abuts the seat 38 and the sections 39, 40 completely are emptied. Section 39 may be shorter than the section Be 40. The latter is at most as long as section 41 or shorter.

If the handle 16 is released before or now, the returns Unit 3 back to its starting position. For that can in the Pump chamber a spring acting on the piston unit, such as a compression spring may be provided. This will get into the pumping chamber sucked out of the room 19 medium while the Exhaust valve is closed. A room is created in room 19 Vacuum. The room 19 sucks in atmospheric air, with a very slow flow rate. The Air flows sequentially through filter 54 Krimpring 9, the end of which, the fuse 50, the jacket 53, the interior of the housing 14 and its free end and / or the channel 36. And that until the pressure in the Room 19 is only slightly below the atmospheric Pressure. It can therefore neither in room 19 nor in the channel section 41 or the intermediate channel sections Germs penetrate. The closing edge of link 25 can on the cylindrical channel part during the closing movement work in the evening. So there are also media residues in Outlet direction removed. Due to the impact of the piston 27 there are also practically none in sections 39, 40 Media residues more. Otherwise they could be contaminated by germs will.

2 is the slide 24, which with the jackets 32, 34 is telescopic, not required. The slide 24 is elastic by a shortenable and extendable component 34 replaced. Part 34 also forms the spring 29 and limits the channel 31 over its entire length and its entire circumference. The Spring 29 extends from the outside of the bottom of the piston 27 up to the annular disk-shaped end wall of the plug body 33, and is formed in one piece with these parts. The spring 29 has constant wall thickness over its circumference and length on. However, the spring jacket forms like one Coil spring one or two interlocking helical gears. So the outer circumference is complementary to the inner circumference as Steep spiral with an incline of at least 30 ° or 45 ° Incline trained. The largest outside diameter or smallest inner diameter of the spring 29 is over its entire Length constant. The smallest inside diameter is less as 5 or 3 or 1.5 mm. The outer circumference of the spring 29 is the inner circumference of the jacket 32 directly without contact across from. In the end remote from the spring 29 Jacket 33 and through the open end of the housing 14 is the coupling body 30 is inserted with an outer jacket, and in position by axial stop. The one in the radial distance the inner jacket lying on the outer jacket forms the coupling member 35 of the body 30.

The bottom of the piston 27 is eccentric within the channel 31 penetrated by an axial transition channel 56. Of the Channel 56 opens into the control and annulus of the piston 27 or in the channels 44. After leaving the plunger 11 flows the medium exclusively within the channel 31. The channel 31 imparts one to the medium through its internal profile helical swirl flow. This flow passes through the channel 56 along the guide surface 46 to the pressure side of the Piston 27 and from there to outlet 17. Channel 56 is much narrower than the channel 31. The component 34 is as Bellows trained. The interior 31 of the bellows 34 is at Opening the valve 22 reduces and thereby contributes to Flow acceleration at. When closing the valve 22 the volume of the room 31 is increased again. Thereby medium is sucked back out of the channel sections 41, 44, 56 and so removed from the area of the valve 22.

3, the diameter of the spring 29 are essential smaller. The channel 56 is designed as an angular channel. Whose to the channel 31 connected channel leg lies in the Axis 10 of the channel 31. The other leg passes through the Guide surface or the outer circumference of the mandrel 26, namely between the ends of the channel 44 and outside the piston 27.

4, the one-piece assembly is made up of components 25 to 27, 29, 33 shown in Figures 2 and 3. In connection on the jacket 33, the spring 29 is indicated in FIG. 2 and following the piston 27 is the spring 29th 3 only indicated with a partial length. This Unit is mounted on units 2, 13 before assembly the jacket 53 and the cam 52 through into the base body 13 and the connector 15 used. Before or after, in the same way the body 30 used. With the body 30 is made of relatively soft springy material existing jacket 33 radially against the inner circumference of the jacket 32 braced. 4, the mandrel 26 is over its entire length Length cylindrical. It is not with a flattening 46 or provided with profiles 37, 47. 4 is also on closing edge 58 of link 25 adjoining end surface 57 good to see. The outlet valve of the pump 6, which to the Pump chamber connects, can be adjusted. So it opens too when the pumping chamber is only filled with air and on Pump stroke is running. The airspace is then continuous from the pump chamber to the closing seat 38, 58. Thereby the priming is very simple Pump when starting up. All canal rooms can be easily filled with medium.

The channel 36 also serves to vent that annular space in the nozzle 15, which is adjacent to the piston 27 when the body 30 how a piston is used. Through channel 36 can this annulus with a test device be pressurized. The overpressure affects the Lip 27. So the dense contact of the lip 27 using a Pressure drop in the annulus can be detected. The flattening or Like. The ends of the spring 29 against mutual rotation secure around axis 10 and relative to body 13. Due to the helical shape, the axial shortening also a torsional stress of the spring 29 is built up. The torsional stress superimposes and supplements the axial spring back Tension. In this way short closing times are achieved. For complete Recording of the nozzle 15 is during rest periods provided a cap, not shown. That cap covers the output 17 with a small distance. The cap extends to the handle 16 and lies close to a bead 59 attached to the outer periphery of the nozzle 15. So is the penetration of germs prevents or complicates.

6 and 7, the seal 8 and the lock 23rd also be extended beyond the gap in the axial direction, which is formed between the neck 5 and flange 7. This can only for the seal 8 or only for the lock 23 be valid. However, the body 60 provided for this can also both as a filter or germ filter as well as a seal serve and be made in one piece throughout. The body 60 may contain antibacterial agents which kill germs effect through contact. The sleeve-shaped extension 62 is provided here upstream of the flange 7 alone.

The sealing or filter body 60 has an annular flange 61 on. The flange 61 lies axially like the parts 54, 55 stretched between the end faces of the neck 5 and the Flange 7. In the relaxed state, the flange 61 is in the Axial section on each side of axis 10 by separate Center points curved. So the flange 61 forms on the system Flange 7 is a convex and to rest against the neck 5 a concave Curvature side, which as an annular groove over the circumference of the Flange 61 passes. On the convex side of the curve at a greater distance from the outer circumference than from the inner circumference of the Flange 61 an axially projecting sealing lip 65 is provided. The annular lip 65 is flanked at an angle in cross section and is due to the bracing with the ring 9 on the end face of the flange 7 flattened. The lip 65 then lies like the radially adjoining sections of the End face of the flange 61 opposite these sections with increased sealing pressure on flange 7. Both faces of the flange 61 are thus continuous in the sealing position even or full-surface on the end faces of parts 5, 7 supported.

Only in one piece closes on the inner circumference of the flange 61 the jacket part 62 axially. The jacket 62 has the most of its length or continuous wall thickness, which is at least a third or a half smaller than the wall thickness of the flange 61 and less than 1 mm or 0.7 mm. The jacket 62 has a longitudinal section 63, which connects directly to the flange 61. Further a longitudinal section 64 is provided, which is only on the section 63 connects. The sections 63, 64 project upstream directed freely into the neck 5 or the room 19. The acute-angled conical section 63 is in this direction narrower than section 64. The latter can be narrowed over the Length of its inner circumference same conicity as that of the immediate have associated part of the housing 12. So lies section 64 is continuous throughout its length and circumference on the outer circumference of this housing section. The length Section 64 corresponds to at least or at most one Third to half of its inner diameter. The inner circumference section 64 is graded like its outer circumference in the expanded inner or outer circumference of section 63 about. The section 63 is like the flange 61 opposite Housing 12 completely non-contact.

The inner circumference of section 64 has two sealing lips or sealing beads 66 on the free end of the jacket 62, 64 have a smaller distance than from section 63 Bead 66 are ring-shaped and project around the inner circumference less than a tenth of a millimeter. Any flat bead 66 is part-circular in axial section, namely above one Arc angle of more than 120 °. By radial pressure against that Housing 12 can thereby each bead 66 in the envelope of the subsequent inner circumference. The Bead 66 runs continuously over the inner circumference. The beads have relative to their individual axial extent 66 a maximum distance from each other. One in contrast, the beads 66 have a smaller distance from the free end face of section 64. In the contact area of the Bead 66, namely between the beads 66 and over the total length of section 64, is the outer circumference of the Housing 12 free of depressions. This is how the beads 66 grip not in recesses. Rather, they are due to the smooth, uninterrupted and narrowed upstream at an acute angle Outer surface of the housing 12 up to a shoulder. With this shoulder, the housing 12 is narrowed upstream. The Ventilation of the room 19 can according to Figure 1 along the outside of the housing 12 or its interior. in the second case, the air flows along the plunger 11 into the Housing 12 and enters the area of section 63 through a Housing opening again, against the inner circumference of the Coat 62 directed. Then the air flows into the section 64. Section 64 becomes radially resilient under the fluid pressure expanded so that the lips 66 lift off from the housing 12 and let the air flow into room 19. So it's here pressure-dependent ventilation valve formed. In front The full pressure equalization is reversed Lips 66 radially inward again in their closed position back, narrowing the entire section 64.

In the first case, the filter can be between the flanges 7, 61 54 can be arranged. This also causes the air to come out first in section 63 and only then in section 64. The body 60 is made in one piece from plastic, namely from a tensile, compression and bending elastic Material. The lips 66 can the associated germ barrier form. The lip seal 60 protects against diffusion of the Medium out of room 19. For pressure equalization in room 19 opens the seal 60 even with a slight negative pressure or a pressure that is only slightly lower than that is atmospheric pressure. The filter membrane 54 is in front Contact or moistening with the medium is protected because the Seal 60 together with the body 12 a drying room limited between the lips 66 and the flange 7th lies within the jacket 62. Penetrates the drying room no medium from room 19. Except for the means for this Functions, the seal 60 still forms the closure seal for the memory 4.

All features of all embodiments can be used together be combined. All stated effects and properties can exactly as described, only approximately or essentially as described or very different, be provided.

Claims (12)

Dispenser for media with a base body (12, 13) for receiving a media room, with a media outlet (17) at the end of a media guide (20) and / or with a fluid guide (21), such as an air supply for pressure compensation in the media room, in particular a) are arranged in the region of the media outlet (17) in an open position closable closure means (22) and b) means are provided in the fluid guide (21) against contamination of the medium. Dispenser according to claim 1, characterized in that the Dispenser two mutually movable units (2, 3) contains that against each other with a pull-off protection (50) are assured that in particular the first unit (2) even without the second unit (3) for itself Discharge of medium under pressure is suitable and that preferably the two units (2, 3) exclusively are connected to each other via a plug connection. Dispenser according to claim 1 or 2, characterized in that that an annular socket (9), like a Crimean ring, it is provided that in particular the socket (9) at least limited part of the fluid guide (21) and that preferably the socket (9) at a distance from it upstream end (48) securing the position (51) for a movable part (13). Dispenser according to one of the preceding claims, characterized characterized that one discharge operation two manually mutually movable, such as axially displaceable, first and second units (2 and 3, 11) contains that in particular the units (2, 3) for repeated discharge from an initial position to a pump end position and are movable back to the starting position and that preferably the socket (9) as a fastening sleeve in a fixed position on the first unit (2) and the Fluid guidance limited from the inside of the socket (9) is. Dispenser according to one of the preceding claims, characterized characterized in that a first unit (2) one with a version (9) on a media store (4) holding pump (6) that in particular the Pump (6) opposite the media reservoir (4) with sealant (54, 55) is supported and that preferably the Sealant (54, 55) penetrated by the fluid guide (21) are. Dispenser according to one of the preceding claims, characterized characterized in that a version (9) in the area of their downstream end (49) on the outer circumference Securing member (51) forms that in particular Securing member (51) due to permanent bending deformation the version (9) is formed and that preferably the second unit (3) in the starting position with a Counter member (52) strikes the securing member. Dispenser according to one of the preceding claims, characterized characterized in that the closure means (22) a under Have a closure member (25) which opens media pressure, that in particular the closure member (25) axially parallel to the media outlet (17) is movable and that preferably an automatic closing movement of the closure member (25) is directed in the direction of flow of the medium. Dispenser according to one of the preceding claims, characterized characterized in that a movable closure member (25) the closure means (22) has a ring edge as the closing surface (58) has that in particular the closing surface (58) through the transition between an end face (57) and a peripheral surface is formed and that preferably the closing surface (58) at the end of one in the area of the Media outlet (17) stepped pin (25, 26) of the Closure member is provided. Dispenser according to one of the preceding claims, characterized characterized in that a control piston (27) of a closure member (25) of the closure means (22) essentially in every position on the inner and outer circumference of fixed guide surfaces of the media guide (20) is axially overlapped that in particular the control piston (27) a channel passing through it (31, 56) Media guidance (20) completely limited over the scope and that preferably the control piston (27) on one of him upstream projecting channel jacket (29) Media guide (20) is arranged. Dispenser according to one of the preceding claims, characterized characterized in that a closure member (25) of the closure means (22) with a bellows-shaped return spring (29) is movable in the closed position, that in particular the return spring (29) an axially deformable jacket has a spiral pitch and that preferably the return spring (29) with one end directly on connects the control piston (27) in one piece. Dispenser according to one of the preceding claims, characterized characterized in that the media outlet (17) at the end of a in the width of reduced outlet connector (15) provided and the upstream end of a return spring (29) within the outlet port (15) with a holding body (30) axially fixed is secured that in particular the holding body (30) solid or in one piece with the Return spring (29) is connected and that preferably the holding body (30) with a separate one from the pump (6) Coupling member (35) for the germ-tight connection is connected to an actuating plunger (11). Dispenser according to one of the preceding claims, characterized characterized in that for sealing the fluid guide (21) or the like. a sealing body (60) with a the base body (12) surrounding sealing jacket (62) is provided that in particular the sealing jacket (62) within a Storage space (19) with at least a third of its Length is close to the outer circumference of the base body (12) and can be expanded by negative pressure in the storage space (19) and that preferably the sealing jacket (62) with two axially spaced sealing lips (66) radially biased on Base body (12) rests, its counter surface in the area at least one of the sealing lips (66) of depressions free is.

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