EP0790079A2 - Fluid dispenser and method for producing a dispenser or the like - Google Patents

Abstract

The unit (2,3) incorporates a spring (30) made of plastic or suchlike and at least one of its cross sectional sides is approximately rectilinear. The spring cross section (50) may have at least two rectilinear sides, and may be four-sided. In the axial plane of the spring the spring cross section preferably has a dimension which differs from its dimension in plane at right angles to the spring axis (10).

Description

The invention relates to a discharge device with which media of any physical state, for example liquid, pulpy, gel-like, gaseous, powdery and / or solid media, can be dispensed through an outlet opening, if appropriate under pressure, in such a way that they are completely at the boundary of the discharge opening the discharge device can be detached or released. The invention also relates to a method for producing a discharge device or other structural units or components, which are formed in particular in a negative mold made of plastic, metal or the like and then removed from the mold by demolding and completely separated therefrom.

The discharge device has two units which are moved against one another for manual actuation of the discharge flow with changes in the length of the discharge device, for example to narrow a pressure chamber of the discharge device under the manual actuation force and thus to pressurize the medium, in particular flowable medium, contained therein. The units can be partially or completely in one piece with one another or can be formed by separately manufactured components which are then connected to one another. The pressure chamber is expediently a pump chamber of a pump, for example a thrust piston pump, which on the outer circumference and one end of a housing and at the other end of a piston which can be displaced in the housing and, if appropriate, of an inlet valve and / or an outlet valve or the like. is limited.

The discharge device advantageously contains a single or several springs, e.g. a return spring for its return stroke, one or more valves or the like. This spring can be arranged dry inside the pressure chamber or outside and is expediently a helical or helical spring, the longitudinally adjacent winding sections of which are spaced apart from one another in accordance with the helix pitch.

The invention has for its object to provide a discharge device for media in which disadvantages of known designs are avoided and which ensures very simple manufacture, in particular with high functionality.

According to the invention, the spring cross sections of at least one spring are designed to deviate from the circular shape over part of their length or over their entire length, so that, for example, sections of different cross-sectional curvature or approximately rectilinear sections are formed over the cross-sectional circumference. The cross section of the spring can thus be of part-circular, triangular, quadrangular, trapezoidal or similar design and expediently extends over the entire length of the spring effective spring spiral through. The shape or the size of the turning cross-section and / or the spring pitch can also change one or more times over the spring length, in particular with continuous transitions. As a result, longitudinal sections of the same spring can have different spring constants. On its side facing the spring axis, the spring cross section advantageously has the greatest axial extent, which can be the same size as or greater than the radial extent of the spring cross section. As a result, regardless of the spring material, the spring characteristics, for example the spring characteristic, the spring force and the temperature-dependent behavior of the spring, can be determined very precisely and adjusted with a small volume of the spring material.

Although the spring could be made of a metallic material, for example stainless steel or the like, or be produced by winding a wire-shaped starting material, it is preferably made of plastic or as an injection molded part, which already receives the spring pitch or spring curvature in the mold . In addition, dimensionally stable connecting sections can thereby be molded in one piece in the same casting mold on one or both ends of the spring helix, which are suitable, for example, as a housing, actuating shaft, support body, valve body, channel body or the like. The associated last turn of the spring can be connected in one piece under the spring pitch obliquely to a surface, such as an end face, of the connecting body, so that none of the adjacent turns of the spring rest directly against one another with their end faces in a relaxed state. The two ends of the spring coil expediently connect to the two connection bodies in diametrically opposite regions in order to ensure that the spring is loaded as tilt-free as possible.

The spring coil can connect over its entire outer and / or inner circumference to a cylindrical or angular envelope surface, which can also be expanded in at least one axial direction. For example, in axial view, the spring windings can lie spirally one inside the other and thereby engage axially in one another in the relaxed and / or loaded state, so that a very small spring length is possible.

The discharge device determined with a device unit for attachment to a storage vessel or storage neck can be made up of very few individual parts, e.g. be composed of two one-piece parts. In this case, all the valves provided can likewise be formed in one piece with the associated device unit, or a separate valve body can be provided for each valve, which can be moved relative to the valve seat of the associated unit.

However, it is also possible for only all of the outer or convex circumferential surfaces that are exposed before being attached to the memory and at least one outer end face of the respective device unit to be formed in one piece with one another. In this case, further functional elements, e.g. Pistons, valve bodies, shafts, the spring or the like can be arranged. These are expediently only attached to the associated unit by axial insertion or insertion and, if necessary, axially fixed or limited in position by pressure, snap connection or the like.

Depending on the intended use of the discharge device, differently designed functional elements can be used in the one-piece base body of each unit, possibly forming the named outer surfaces, for example by on the one hand to effect an atomization-free discharge of a creamy liquid or on the other hand to atomize the discharge of this or another liquid. This is achieved in particular by differently designed channel bodies and nozzle geometries, which in the first case have smooth nozzle surfaces and in the second case jagged nozzle surfaces, which are expediently delimited in one piece by the associated base body of the discharge head.

Appropriately, the discharge head with its outermost jacket or the like overlaps the housing base body of the other device unit in the starting position and / or in the actuated end position over part of its length on the outer circumference, so that the most open end of the head facing the head Housing must not be closed with a separate, firmly attached cover, but is shielded, protected and covered by engagement with the head. The head can have a constant outer width over its length or be offset in width on the outer circumference with the formation of a transition shoulder, so that the longitudinal section of the head spanning the housing is wider than the longitudinal section containing the outlet opening. At least in the actuated end position, the housing can also engage in the narrower head section.

If the housing unit is to be fastened to the accumulator with a cap or the like, then this cap expediently has a form-locking member on the inner periphery of its jacket, such as a snap cam, a protruding screw thread or the like, which is closest to the open end of the cap jacket Enclosure casing surrounds. This housing jacket can have an annular disk-shaped end wall, for example between two housing sections, different in the plane of this form-locking member Width, and thereby form a zone stiffened against radial deformation, so that a very high degree of dimensional stability is ensured even with a small shell thickness.

According to the invention, a method for the production of at least two or more components is also proposed, which are initially produced in the injection molding process or the like as a one-piece structural unit and thereby assume a first mutual position, namely the production position. After the first and / or the second component has achieved sufficient dimensional rigidity, for example by solidification of the cast material, the two components are transferred to a second mutual position, namely their functional position, in which they can be arranged to be movable or rigid in relation to one another. In this second position, the two components are expediently aligned with one another with surfaces, guided or held, which are at a distance from those surfaces which serve to connect the two components to one another during manufacture and are located in the material flow through the paths of which plasticized casting material passes from the mold cavity of one component into the cavity of the other component. The connecting links formed in this way, which also solidify and of which only a single connecting link can be provided, can remain firmly connected to the first and / or second component before, during or after the transfer into the second position. However, they can also be separated from the first and / or second component by breaking off, tearing off or the like and, in particular during the subsequent manufacture of the next structural unit, can be melted completely encased in the respective component so that they are disposed of without waste.

If the connection contains one or more film joints or flexible intermediate links, these are expedient at Transfer into the second layer so recessed in the recesses or openings of the first and / or second component that they do not form a loop, but are inaccessible with regard to accidental mutual loosening of the two components.

The first component can be the first and / or second base body of the discharge device, so that it consists of only two units each made in one piece and nevertheless has at least three or four parts that can be moved relative to one another. The second component can be a guide body for the medium or a body which is in direct contact with the medium when the discharge device is ready for operation or only during a discharge cycle or in the rest position. The second component is expediently completely sunk in the second layer and arranged within the first component inaccessible from the outside, but can also form one of its outermost surfaces. The second component can be the spring described, a valve body, a nozzle body of the discharge nozzle or any other component of the discharge device.

Fig. 1

eine erfindungsgemäße Austragvorrichtung im Axialschnitt und wesentlich vergrößerter Darstellung,

Fig. 2

eine abgewandelte Ausführungsform der Fig. 1,

Fig. 3

einen einlaßseitigen Gehäuseteil im Axialschnitt,

Fig. 4 und 5

zwei weitere Ausführungsformen von Gehäuseteilen gemäß Fig. 3,

Fig. 6

eine weitere Austragvorrichtung im Axialschnitt,

Fig. 7

eine abgewandelte Ausführungsform der Fig. 6,

Fig. 8

eine Austragvorrichtung aus nur zwei Hauptteilen,

Fig. 9

eine abgewandelte Ausbildung der Fig. 8,

Fig. 10

das Einlaßventil der Ausführungsform nach Fig. 8,

Fig. 11

das Auslaßventil der Ausführungsform nach Fig. 8,

Fig. 12

eine weitere Ausführungsform einer Austragvorrichtung im Axialschnitt,

Fig. 13

eine weitere Ausführungsform im Axialschnitt und

Fig. 14

ein Detail der Fig. 13 in Axialansicht.

These and further features emerge from the claims and also from the description and the drawings, the individual features being realized individually or in groups in the form of sub-combinations in one embodiment of the invention and in other fields and being advantageous and capable of being protected by themselves Can represent versions for which protection is claimed here. Embodiments of the invention are shown in the drawings and are explained in more detail below. The drawings show:

Fig. 1

a discharge device according to the invention in axial section and substantially enlarged illustration,

Fig. 2

2 shows a modified embodiment of FIG. 1,

Fig. 3

an inlet-side housing part in axial section,

4 and 5

two further embodiments of housing parts according to FIG. 3,

Fig. 6

another discharge device in axial section,

Fig. 7

6 shows a modified embodiment of FIG. 6,

Fig. 8

a discharge device consisting of only two main parts,

Fig. 9

a modified embodiment of Fig. 8,

Fig. 10

the inlet valve of the embodiment of FIG. 8,

Fig. 11

the outlet valve of the embodiment of FIG. 8,

Fig. 12

another embodiment of a discharge device in axial section,

Fig. 13

a further embodiment in axial section and

Fig. 14

a detail of Fig. 13 in axial view.

All of the features of the discharge device 1 according to the invention according to FIGS. 1 to 11 can be provided in a single discharge device, which can in each case contain one or more of the units or outlet openings explained below. The device or base units 2, 3 are guided in a linearly displaceable manner and each have a one-piece base body 4, 5, which is freely accessible from the outside, namely an elongated inner base body 4 and a shorter outer base body 5. When the discharge device 1 is held upright or vertically and with the outlet at the top, insofar as related to the longitudinal direction, the inside is synonymous with the bottom and the outside is synonymous with the top.

The tubular hollow body 4, which is continuous over its entire length, essentially forms a tubular housing 6 with sections of different internal and / or external width, which is narrower at the inner housing end 7 than at the outer housing end 8. The inner end is formed by a media inlet 9 or a closure which blocks the medium from flowing out of the inner end during the discharge stroke and can open during the return stroke in order to draw new medium into the housing 6 through the inlet 9. Essentially all the components of the device 1 lie in a common axis 10. Over the end 7, a nozzle 11 of the base body 4 can also protrude inwards, which serves to receive a flexible riser pipe 12, forms the narrowest section of the body 4 and 6, respectively tightly surrounds the outer end portion of the riser tube 12 on the outer circumference. The inlet closure is formed here by a pressure-dependent opening and closing inlet valve 13, the spherical valve body 14 in a valve housing lying within the housing 6 15 is radially and axially limited movable. The conical valve seat is formed directly by the housing 6 and lies at its transition to the nozzle 11.

The closure 13, which can be designed to be fixed or in one piece with the housing 6 when the pump is not sucking in again, lies in a pressure space 16 delimited by the housing 6, which extends axially from the closure 13 to a piston 19 opposite it. This is slidable and sealed with two oppositely directed and directly merging, conically enlarged ring lips on the inner circumference or a raceway 17 of the casing 18 of the housing 6. The piston 19 is part of a piston unit 20 of the base unit 3 and can be moved in a limited manner relative to the base body 5 in both opposite longitudinal directions. In Fig. 1, the rest or starting position of all components is shown, in which the piston 19 is the most displaced in relation to the base body 5. The piston 19 is formed in one piece with a sleeve-shaped piston neck 21 which only projects outwardly beyond it and whose inner circumference delimits a channel 22 through which the medium can flow out of the space 16 to the outside to an outlet valve 23.

The valve 23 or its valve body 24, 25 are arranged on the unit 3. The piston neck 21 is narrowed with respect to the piston 19 and, at a distance from the piston 19, has an end section which is again narrowed, which forms the sleeve-shaped valve body 24 which is movable relative to the base body 5 and the valve body 25. The valve body 25, which is fixed relative to the base body 5, is formed by a longitudinal section of a stem 26 which penetrates the valve body 24 and projects outward beyond the piston neck 21 and with its outer end in the base body 5 is firmly anchored. The outer periphery of the valve body 25 forms its valve seat, which is penetrated by at least one valve opening or a transverse channel 27, which in the closed state is covered and sealed by the valve body 24. If, on the other hand, the valve body 24 is displaced outwards, the valve openings reach the enlarged area of the piston neck 21 and are thus directly connected to the channel 22 and the pressure chamber 16 in the manner of an open slide valve. The valve openings or the transverse channel 27 are connected to the outside in the axis 10 by a central or longitudinal channel 28 which, like the channel 27, is completely delimited by the shaft 26 and penetrates the outermost end of the shaft 26.

A further slide or piston 29 is provided, which belongs to the unit 20, is fixedly connected to the parts 5, 26 and begins the lifting movement in front of the piston 19, in which the piston 19 is subsequently carried along after opening the valve 23. The slide 29 forms one of two valve bodies of a valve 33 for ventilation of the storage space during the pump stroke and seals the storage space to the outside in the initial state. The piston 29 is cup-shaped with a cup jacket directed against the piston 19, which surrounds the valve body 24 with a radial spacing and slides at the inner end of the cup jacket with a piston lip on the inner circumference of the jacket 18 which is enlarged relative to the raceway 17. The jacket 18 is transversely penetrated by one or more openings 32 which overflow from the piston lip during the opening of the valve 23 in the manner of a slide valve 33 and are thereby connected to the end 8 along the outer circumference of the slide 29. On its side facing away from the space 16, the piston 19 and, at a distance from one another, the piston 29, together with the jacket 18, delimit an annular, not acted upon by the medium Space 31, which is connected to the storage space via the openings 32 in the idle state and is completely closed after the slide valve 33 is closed.

At the annular bottom of the slide 29 adjoins in one piece and with a much smaller width, a hollow slide shaft 34, the outer end portion 36 of which is again reduced in width and in which the shaft 26 engages tightly, which lies completely within the base body 5 and one extended channel continuation 35 of the channel 28 limited. The outside of the bottom of the slide 29 abuts a stop 37 in the starting position, which protrudes at the end 8 as an annular bead over the inside of the jacket 18 and whose inside width is larger than the outside width of the piston 19, but smaller than that of the slide 29, so that the piston 19 can be inserted without contact and the slide 29 can be inserted into the housing 6 through the stop 37 in the manner of a snap member. Within the spaces 16, 31 there is a compression spring 30 which penetrates the piston 19 and the neck 21 and which is provided as a return spring for the units 2, 3 and for the valves 23, 33.

Outside the unit 2 and freely accessible, the unit 3 contains an actuating or discharge head 38 which is formed by the base body 5 and forms an extension of the outer end 8 of the body 4 and the unit 20. The cap-shaped head 38 has an outermost jacket and at its outer end an end wall 44, which is radially penetrated on the outer circumference of the head 38 by the outlet opening 40 opening into the open. At a radial distance within the casing 39, a sleeve-shaped shaft 42 of the body 5 projects from the outer wall 44 only inwards, in which the shaft 26 and the neck 34, 36 are inserted firmly and with limited axial stop. The The free end of the shaft 42 can strike the outside of the bottom wall of the slide 29, while the free end of the jacket 39 in the area of the end 8 closely surrounds the jacket 18 on the outer circumference. Provided within the shaft 42 is a channel 43 passing through the body 5, which forms a narrowed extension of the channel 35 and in the end wall 44, after being bent with a straight channel leg, extends directly to the opening 40 so that it is directly delimited by the body 5 and none separate nozzle body is required.

The outer end face of the body 5, 38 forms a finger pressure surface or handle 41, by means of the manual pressure load, the unit 3 can be manually moved inwards relative to the unit 2, the bottom surface of the storage vessel being provided as a counter-handle for another finger of the same hand of the user can be. The resiliently deformable longitudinal section of the spring 30 connects in one piece to an inner and an outer, each dimensionally stable connecting body 45, 46, which serves as an abutment for the deformable spring section. The inner body 45 is cup-shaped or sleeve-shaped and, under the force of the spring 30, is fixed inward in the region of the valve 13 by a stop relative to the body 4. For this purpose, a projecting annular collar is provided on the outer circumference of the body 35, which is supported on an annular shoulder of the body 4 projecting inwards over the inner circumference 17. The body 45 delimits the housing 15 on the side opposite the valve seat or valve body of the base body 4 within the space 16 such that the valve body 14 is limited in its opening movement by the body 45 and centered with respect to the axis 10 with radial play.

The associated end turn 47 of the spring 30, which is resiliently movable with respect to the body 45, connects in one piece to the outer end face of the ring-shaped base of the body 45 under its constant spring pitch, which base, like the inner circumference of the body 45, can be penetrated by longitudinal channels. Compared to the outer circumference of the spring 30, the body 45 or the bottom thereof has a larger width. The outer drafting 48 connects in a corresponding manner to the connecting body 46, which by the inner, enlarged end of the shaft 26, or. Valve body 25 is formed and forms a withdrawal stop for the piston carrier 21 or the annular transition section to the neck or valve member 24. As a result, the valve body 24 with the piston 19 is axially limitedly movable between the latter and a further stop formed by the inside of the bottom of the slide 29 such that the valve 23 closes when the body 46 stops and the valve 23 stops when the slide 29 stops is open. The friction of the piston 19 with respect to the body 4 is chosen so high that the piston 19 stops with the first partial stroke of a pump stroke with respect to the body 4 and is only taken along when the valve 23, when the slide 29 stops on the end face of the valve body 24, 33 have been opened. The channels 27, 28, 35, 43 are valve-free from the valve 23 to the opening 40.

The coil of the spring 30 has polygonal spring cross sections 50 which have an axial extension of the same size or greater on the inner circumference 49 than on the outer circumference 51. The inner flank 49 of the cross section 50, like the outer flank 51, lies continuously parallel to the axis 10, while the lateral or radial flanks 52 connecting these flanks 49, 51 converge symmetrically to the outside and a distance as large or smaller as the flanks 49, 51 from each other. Each of the flanks can be straight and for that Manufacture of the spring, it is useful if the bottom of the body 45 has an inner width that is at least as large as that of the circumference 49. The helix of the spring 30 is expediently produced in a shape that is stretched relative to the starting position, ie with a larger pitch, so that it has axial prestress in the starting position. The outer circumference 51 can slide on the inner circumference 22, so that the parts 21, 30 are supported radially against one another.

The raceway 53 for the valve lip of the valve 33 ends in a stop 54, which is formed by an annular shoulder of the inner circumference or a wall section 55 of the casing 18, which is radially thicker than the subsequent casing sections. At the end of the pump stroke, the slide 29 strikes the stop 54 without the piston 19 having to strike its inner lip or the like when the body 45 engages in the cup opening of the piston 19, so that its piston lip is protected against compression .

In the area of the space 31 or the raceway 53, the annular disk-shaped end wall 57 of a cap-shaped fastening member 56 of the base body 4 adjoins the outer circumference of the casing 18. The jacket 58 of the link 56 only projects inwards beyond the end wall 57, which is at a distance from the end 8. An engagement member, such as an annular cam 59, a screw coil or the like, is provided on the inner circumference and on the free end of the jacket 58. The fastening member 56 is used to fasten the discharge device 1 to a bottle-shaped storage 60 such that the inner end of the unit 2, 4 projects into the storage space 63, the fastening member 56 surrounds the storage neck 62 narrowed relative to the storage belly 61 on the outer circumference, the cam 59 in a counter member engages at the transition between the storage belly 61 and the storage neck 62 and the end wall 57 as a storage seal rests with axial prestress on the end face of the storage neck 62. As a result, the opening 32 lies at a radial distance within the neck 62 and is always connected to the storage space 63 by a line. The jacket 18 projects beyond the outside of the end wall 57 and projects into the head 38. The cam 59 lies in the same diametral plane as the section 55, which forms a substantial stiffening of the casing 18, similar to the stiffening of the casing 58 by the cam 59, which is a radially resilient snap member for snap connection to the accumulator 60.

To assemble the pump, the one-piece unit 25, 26, 30, 45, 46 is first inserted outward from the piston 19 into the one-piece unit 19, 21, 24. When assembling in an upside-down position, the valve body 14 can be inserted centered in the permeable cage body 45, after which the assembly unit thus formed is inserted past the cam or stop 37 through the end 8 into the housing 6. Before or after, the one-piece unit 29, 34, 36 or the one-piece unit 39, 42, 44 can also be connected to the shaft 26 or 36 in the same direction as the piston body 19, 21 solely by axial joining. The cam 37 also forms a radially resilient snap connection with the slide 29, by means of which the unit 20 is secured against being pulled out of the unit 2.

By depressing the handle 41, the valves 23, 33 are initially simultaneously opened when the piston 19 is stationary, after which the piston 19 is carried along by a stop and the space 16 is narrowed and the medium contained therein is pressurized, by means of which the valve 13 is kept closed. Under this pressure, the medium flows from the space 16 through the piston 19, the neck 21 and the spring 30 one after the other into the channels 27, 28, 35, 43 and thus passes through the opening 40 into the open. At the same time, atmospheric air flows through the inner end of the head 38, the end 8 of the housing 6 and the openings 32 into the storage space 63 in order to compensate for the amount of media removed from it in the space 16 and to prevent the creation of a negative pressure in the space 63. After release of the handle 41, the spring 30 first presses the valve body 25 into the closed position, the body 46 into the stop position and the slide 29 with respect to the piston body 19 into the starting position, after which the piston body is returned to the rest position together with these parts. As a result, the space 16 is expanded again, the valve 13 opens under the negative pressure in the space 16 and the next media dose is sucked in from the floor area of the storage space 63 into the space 16 via the channel parts 11, 12, which dose is described in the next possible pump stroke in the one described immediately below Way is carried out.

The embodiment according to FIG. 1 is particularly suitable for the strand-like discharge of a creamy or liquid medium from the opening 40 without being sprayed or atomized, which is advantageously possible with the embodiment according to FIG. 2. The shaft 26 does not limit the channel 28 alone as shown in FIG. 1, but together with additional links, namely with the outer end portion of the neck 21 and then with the shaft 34. A plurality of channels 28 can be on the outer circumference of the shaft 26 in the form of Longitudinal grooves are provided which extend to the valve seat of the valve 23. The closing surfaces of this valve 23 abut one another axially in the closed position, the valve body 24 being formed by an annular lip on the inner circumference of the neck 21 and the valve seat being formed by an annular shoulder of the valve body 25, which at the same time forms the connecting body of the links 30. The outer end portion of the neck 21 adjoining the valve body 24 is axially compressible with elastic expansion and sealed with its outer end, limited by stops and centered in an opening surrounding the shaft 26 in the bottom of the slide 29.

The valve 23 therefore does not open as a function of FIG. 1, but rather as a function of pressure only after a predetermined pressure in the space 16 has been exceeded against the force of the valve or compression spring mentioned, so that the medium is already under high pressure before flowing into the channel 28 . The inner circumference of the leg of the channel 43, which is coaxial with the opening, can be provided up to the opening 40 with profiles 64, for example longitudinal or spiral grooves distributed over the circumference, through which the flowing medium swirls and / or a circular flow around the one perpendicular to the axis 10 Is subjected to the nozzle axis so that it tears off at the boundary of the opening 40 to form a spray cone.

According to FIGS. 3 to 5, a separate from the outer end 8 or from the fastening member 56 housing body 6a is provided, which delimits the space 16, the nozzle 11 and the valve seat of the valve 13 and with a fastening or Snap member 66 is to be fixedly attached to another housing body which contains end 8 or fastening member 56. The link 66 can be penetrated by the opening 32, which starts from a longitudinal groove on the inner circumference 53. The body 45 is here formed separately from the spring unit and has a receiving member 65, for example a freely projecting mandrel for engagement in the inner circumference 49. The inner end of this mandrel 65 serves as a stop for the open position of the valve body 14, which is not spherical, but rather as an elongate body with a central shaft and one over the outer circumference of the protruding locking collar is designed to rest on the valve seat. The inner end of the stem is centered in each valve position in an opening of the base body 4 adjoining the socket 11, while the other end of the stem is provided for abutment on the mandrel 65. The mandrel 65 is provided with longitudinal grooves for the passage of the medium.

The shaft of the valve body 14 according to FIG. 4 is not continuously cylindrical, but is subsequently conical to the closing collar and adapted to the inner circumference of the conical transition section between the jacket 18 and the socket 11.

5, the stem of the valve body 14 passes through the housing body 45 in the direction of the space 16 up to the turn 47. The valve body 14 projects inwards from an annular disk-shaped plate, from which the stem protrudes outwards, the one-piece valve body thus formed can be inserted transversely or radially into the correspondingly open body 45 on the outer circumference during assembly. In the direction of the space 16, an extension of the socket 11 into the housing 6 projects freely, a sleeve-shaped projection which forms the conical valve seat for the valve body 14, is formed in one piece with the jacket 18 and always projects into the body 45. The connector body 46 here is a sleeve-shaped component separate from the shaft 26, which forms a connecting member for the plug connection with the shaft 26 or the valve body 25.

6, the section 36 of the shaft 34 receives the head shaft 42 inside so that it can strike against the inside of the end wall 44. Formed over the inner end of the slide 29 and in one piece with it Shaft 26, which forms the valve body 25 with a reduced end section, so that the piston neck or the valve body 24 is always at an axial distance from the slide 29 and the opening stop for the valve body 24 is formed by an annular shoulder of the shaft 26. As a result, the piston body 19 can be made substantially shorter than that shown in FIGS. 1 and 2 from a material that is more pressure-elastic than the slide component 29. The valve housing or the cage 15 here, including the opening stop, is formed in one piece with the base body 4 or the housing 6 or 6a, and the dimensionally stable valve body 14 can be inserted into the cage space in the manner of a snap connection through the radially resiliently expanding opening stop.

The spring 30 is arranged completely outside the space 16 or the housing 6 around the jacket 18, the piston unit 20 or the links 26, 29, 34, 36, 42 and with one end turn 47 on the fastening member 56 and with the other end turn 48 supported on the body 5, 38. The support is expediently carried out on the outside of the end wall 57 and on the inside of the end wall 44, the spring 30 nevertheless being completely covered on the circumference and at its ends in every position of the discharge device 1, namely by the jacket 39 and a jacket of the Fastening member 56, which protrudes in the extension of the jacket 58 over the outside of the end wall 57 and closely surrounds the jacket 18 with a greater distance and the jacket 39. The spring 30 could also be produced here as a wound spring from a plastic strand, which is slightly softened by heating during winding and thus ensures a very high spring force after cooling and hardening. The end turn 47 or 48 can be perpendicular to the axis 10 or to the end wall 57, 44 parallel plane and so be supported on its wall over its entire circumference.

The same also applies to the unwinding 47 according to FIG. 7, which here, however, connects in one piece to the end 8 of the base body 4, 6 and has the same inside and outside width as this end 8. The shafts 42, 34 are formed here in one piece with one another and with the slide 29, so that they belong to the base body 5, including the valve body 25. The valve 23 can be designed according to FIG. 6. The inner end section of the jacket 39 is widened in the inside and / or outside width in relation to the outer end section adjoining the end wall 44 and closely engages over the outer circumference of the fastening member 56 in every position. The raceways 17, 53 can also have the same width and merge into one another without gradations. The valve 13 according to FIG. 7 is a plate valve, which can be described in more detail with reference to FIGS. 8 and 10.

8, the piston 19 is integrally formed with the shaft 26, 34, 42 and the body 5, 38 and with the valve body 25 and the slide 29, which does not have to run sealed on the inner circumference of the jacket 18, but in particular as Closure of the outer end of the housing interior and serves as a counter-stop for the stop 37, wherein it protrudes over the outer circumference of the shaft 6, 34 with opposite conically merging circumferential surfaces. The opening 32 passes through the fastening member 56 or its end wall 57 directly adjacent to the outer circumference of the jacket 18, so that the storage space can always be ventilated through the capillary-narrow openings 32. The media channel is here limited in one piece from the pressure chamber 16 or valve seat of the valve body 25 to the opening 40, so that the channel sections 22, 27, 28, 35, 43 according to FIG. 1 can be formed by a one-piece component.

According to FIG. 9, spring cross sections 50 are elongated transversely to the longitudinal extent according to FIG. 1 or parallel to the axis 10 and are rectangular and at least two or three times larger than their thickness, so that the spring coils form a flat strip and are constant over the length of the spring 30 or have varying cross sections 50. The spring cross sections can also be larger radially than axially or the same size. The spring 30 is only conically widened in the axial direction, namely to the end turn 48, while the smallest turn 47 connects in one piece to the end 8 and can have approximately the same thickness as the jacket 18. Each smaller coil engages closely adapted over its entire circumference and without contact into the interior of the next larger coil, namely in the starting position by an amount which is smaller than the axial extension of the spring cross section 50 or half or a third thereof. The winding 48 lies at an arc angle of at least 180 ° without a slope at right angles to the axis 10 and is supported on the inside of the end wall 44. The spring 30 is formed separately from the body 5, 38 and the winding 48 can be supported with its outer circumference on the inner circumference of the jacket 39 without radial play under expanding tension. The jacket 39 has a constant inside and / or outside width throughout and the spring 30 lies entirely within the body 5, 38 as in FIGS. 7 and 8.

The valve housing 15 of the valve 13, which is formed in one piece by the housing 6, has a plate-shaped or foil-shaped, flexible and / or pressure-elastic valve body 14 of constant thickness, which can be formed, for example, by an elastomer or thermoplastic and lies in the cage 15 with little radial play . This cage is through a recess on the Formed inside of the bottom of the housing 6 penetrated by the inlet 9. In the inner closed position, the valve body 14 lies with one plate side sealed against an annularly closed bead projection of the bottom surface of the recess 15. In the area of the opening of the recess 15, a corresponding bead-shaped stop 67 protrudes over its inner circumference, which, however, is penetrated by media passages and is therefore divided over the circumference into individual cams. 10, with the other side of the plate and / or the transition edge to the edge surface, the valve body 14 lies in the outer, open position according to FIG. 10, the passage channels in the stop 67 remaining open and the medium between them Edge surface and the inner circumference of the recess 15 can flow into the space 16.

The outlet valve 23 arranged inside the bottom of the piston 19 immediately following the channel 28 has a valve body 24 arranged in a cage or in a recess of the piston bottom in a corresponding manner according to FIG. 11, which has or has the properties described with reference to FIG can be formed by the same component as the valve body 14. In the outer open position, the valve body 24 rests on the bead projection of the base of the depression 27 directly adjoining the conical piston lip, the passages being provided in this base bead. In the open position, on the other hand, which is offset inwards, the valve body 24 rests, as described with reference to the stop 67, but in a sealed manner, against the annular bead which projects over the inner circumference and which, like the limitation of the recess 27, is formed in one piece with the piston 19. This has only a single, inwardly directed piston lip.

The riser pipe can also be formed directly by the nozzle 11 and therefore be formed in one piece with the base body 4, so that a separate riser pipe 12 according to FIG. 1 is not required. The valve body 14 could also be formed in one piece with the body 4, 6 and the valve body 24 in one piece with the body 19, 25 and, if appropriate, connected to the respective associated body via a film joint or the like. In the rest or initial position, the spaces 16, 22, 31, 32, 63 can be closed in a pressure-tight manner with respect to the outside atmosphere by the valve designs described.

12, the piston 19 is formed in one piece with the shaft sections 21, 34, 42, so that these parts form a tube which has constant internal cross sections over most of its length. The valve body 24 forms a component which is produced in one piece with each of these shaft sections or the component 5, specifically in the first layer 70 indicated by dash-dotted lines, which differs from the second layer, namely the functional layer 71 in the region of the valve body 25. In position 70, component 24 is axially offset by a multiple of its length and / or its greatest width relative to position 71 along the shaft, namely from its closed position by a multiple of its opening path beyond the opening position. The component 24 has a shaft 73 with continuously constant external cross sections and at one end of the shaft 73 an enlarged, frustoconical head 72, the inclined circumferential surface of which forms the closing surface 77 with which the valve body 24 rests in the closed position on the closing surface of the valve body 25.

In the position 70, the end face of the one-piece component 24 or the head 72 touches an inner cavity of the Component 5, namely the radial section of the channel 43, so that the farthest outer circumference of the component 24 formed by the head 72 directly adjoins the inner circumference of another inner cavity, namely the channel 35. The outer circumference of the section 73 is thus at a radial distance from the inner circumference 35. A tool of the manufacturing form which is to be pulled out after manufacture by the free end of the piston 19 is used for shaping both the inner circumference of the piston 19, the valve body 25 and the tube and also for shaping the entire outer circumference of the component 24 and its end surface facing the piston 19, which is formed by the shaft 73. According to the invention, this tool has a sleeve for shaping the outer circumference, including the surface 77 and the inner circumference of the tube, and a core which is displaceable therein for forming the end surface, these two tool parts being displaceable relative to one another. The wall of the sleeve is penetrated over the circumference by passage openings for the material, each of which is continuously limited over its circumference. Further tool parts of the manufacturing form serve for the simultaneous shaping of all other areas of the structural unit 5, 24.

The material for the production of the assembly 5, 24 is injected in a flowable state into all interconnected cavities of the mold under pressure and elevated temperature, so that both components 5, 24 and a connection 74 between these two components 5, 24 are produced at the same time. The connection 74 is formed by connecting links 76, which are formed through the passage openings in the sleeve-shaped individual tool and initially connect the outer circumference of the shaft 73 in one piece with the inner circumference of the tube 19, 21, 34, 42 at an axial distance from the working and functional surface 77. Such a hair fine Connection can also be provided in the area of the largest outer circumference of component 24. After both components 5, 24 have solidified due to cooling, the tool is pulled axially inward away from the handle 41 out of the piston 19, the area of the connections 74 adjoining the component 5 or the inner circumference 35 being shaped like predetermined breaking points Shear to be separated. At the same time, component 24 is transferred from layer 70 towards layer 71. If the component 24 has reached this position, possibly by overcoming a resilient escapement, the two tool parts are moved axially relative to one another in such a way that the connections 74, 76 are also separated from the component 24 by shearing or the like, but thereafter in the Through openings of the tool remain. The tool is then completely pulled out of the assembly 5, 24, namely from the free end of the piston 19, which is shown here in the actuated end position. To transfer from layer 70 to layer 71, the tool can also have disengageable retaining claws for holding component 24 in place. The connection zone 75 defined by the webs or pins 76 lies exclusively in the region of the section 73, so that the surface 77 cannot be damaged when the connection 74 is separated.

For the immediately subsequent manufacture of the next structural unit 5, 24, the connecting links 76 of the previously manufactured structural unit can remain in the tool or its through openings. When the next batch of plasticized material is fed in, these connecting members 76 are then expelled radially inwards into the cavity which is used to form the component 24. The ejection is effected exclusively by the material flowing in under pressure, which flows into the cavity, and in the process the ejected connecting links 76 by heat exchange plasticized and completely embedded in the component 24 so that the connecting members 76 then form a portion of the material volume of the component 24 and new connecting members 76 are formed for the component 24 being manufactured.

The continuously continuous closing surface of the valve body 25 is formed by an annular inner bead in the tube or piston 19. Stops 68, 69 on the inner circumference of the tube are offset above in the flow direction relative to this closing surface so that they allow the component 24, in particular the head 72, on them in the manner of a resilient snap connection, possibly with an elastically restoring expansion of the tube to pass when it is transferred to position 71. The stops 68, 69 are cams distributed over the circumference and spaced apart from one another, which are opposite the closing surface of the valve body 25 at a distance and against which the valve body 24 abuts in the open position. The valve body 24 according to FIG. 12 can assume an inclined position relative to the axis 10, so that it performs not only an axial but also a tilting movement during its functional movements.

Similarly, the valve body 14 of the inlet valve 13 is made in one piece with the component or base body 4 and then transferred from the dot-dash position to the functional position. With regard to the valve body 14, the same reference numerals are used as for the valve body 24 of the exhaust valve 23, so that the corresponding parts of the description also apply mutatis mutandis to the manufacture of the assembly 4, 14. However, the path between the two layers is smaller than the axial length or the greatest outside width of the component 14. The head of the component 14 lies in the first position outside the valve housing 15 and is then snapped into it in order to be movably secured in the second position between two end positions. The valve housing 15 formed in one piece with the component 4 is formed here by projections distributed over the circumference, which also form the stops for the movement of the valve body 14. The connecting links 76, like the associated passage openings of the tool, are flared in the ejection direction, so that they can be ejected very easily. These links 76 also connect to the inner circumference 9 of the housing 6 during manufacture.

According to FIGS. 13 and 14, the second component is a guide or nozzle body 78 for the medium, which either forms the outlet opening 40 directly or is located immediately upstream of the nozzle opening. The body 78 in the manufacturing position 70, shown here alone, protrudes almost completely beyond the outside of the component 5, namely the end face 41, and adjoins the wall 44 to form the connection 74 with an edge face. The component 78 lies in the direct extension of a receptacle 79 or pocket-shaped or shaft-shaped opening which is closely matched to it and which passes through both end faces of the wall 44 as a through opening and is continuously delimited by the component 5 over its circumference. The radial leg of the channel 43 adjoins one side of the receptacle 79, while the opposite boundary is penetrated by a passage 81 which is substantially wider than the outlet opening 40.

The plate-shaped, rectangular or square component 78 has on a plate side a guide device 80, such as a swirl device, for the medium, which is formed by a recess in this plate side and of which Nozzle channel conically narrows towards the outlet opening 40. The guide recess 80, which forms an annular channel around the nozzle axis and, starting therefrom, directed towards the nozzle channel, lies in the position 70, like the nozzle channel, completely outside the component 5 and, in the functional position, serves to pass the medium flowing in from the channel 43 transversely to the nozzle axis to deflect or to place in a rotational flow continuing into the outlet opening 40 about the nozzle axis.

After the construction of the assembly 5, 78 in the layer 70, the component 78 is pushed into the receptacle 79, in which the guide device 80 is connected eccentrically to the channel 73 and the outlet opening 40 is aligned approximately coaxially with the passage 81. The component 78 then forms with its outer edge surface a continuously continuous section of the end face 41 and, with its two surfaces facing away from one another and lying transversely to the nozzle axis, is free of play or with pressure in all other directions by contacting the corresponding counter surfaces of the receptacle 79 the component 5 fixed. When moving into the functional position, the connection 74 is broken. As a result, a two-part or multi-part nozzle arrangement can be created with one-piece production of all associated components and without assembly work after demolding from the production mold. The component 78 can, however, also be produced separately from the component 5 and then mounted on it.

All properties and effects can be provided exactly as described or only approximately or essentially as described or also very differently, depending on which effects are desired. Furthermore, each component, unit and spatial arrangement can only be one Be provided one or two or more times, as well as separately or integrated. It is also possible for two or more identical or different discharge devices according to FIGS. 1 to 11 to be combined to form a discharge unit for a single or a plurality of separate stores 60, since all features can be implemented in all embodiments.

Claims (16)

Discharge device for media with two device units (2, 3) which can be moved relative to one another to actuate the media discharge or the like, characterized in that at least one component, such as a spring (30) with spring cross sections (50) and cross-sectional flanks (49, 51, 52), is provided and in particular in at least one position of the device units (2, 3) is under spring tension or a spring pitch is determined, the component consisting of plastic or the like and / or at least one of the cross-sectional flanks (49, 51, 52 ) is approximately straight. Discharge device according to claim 1, characterized in that the spring cross sections (50) have at least two essentially straight flanks (49, 51, 52), that in particular the spring cross sections (50) are square and that the spring cross sections (50) are preferably parallel to the spring axis ( 10) have an extent that is different in size compared to its extent in a plane perpendicular to the spring axis (10). Discharge device according to claim 1 or 2, characterized in that one of the device units (2, 3) contains a housing (6), such as a pump-cylinder housing, and that the spring (30) is formed in one piece with the housing (6) that in particular the spring (30) forms a continuation of an annular end (8) of the housing (6) and that preferably a last and resilient end turn (47) of the spring (30) merging into a dimensionally stable housing section (8) of the housing (6) ) has approximately the same inside and / or outside width as the housing section (8). Discharge device according to one of the preceding claims, characterized in that one of the device units (2, 3) contains an actuating head (38), such as a discharge head, connected to a channel shaft (26) and in that the spring (30) is formed in one piece with the channel shaft that in particular the channel shaft (26) is directly connected to a pump piston (19), a control piston (29), a valve body (24), a valve spring or the like, and that preferably the channel shaft (26) is connected to a shank section into an intermediate shark (34) is used, which in turn is in direct engagement with the actuating head (38) in the region of the shaft section. Discharge device according to one of the preceding claims, characterized in that one of the device units (2, 3) contains a stop body (45) with a stop for a valve body (14) which is in the open position, and in that the stop is integral with the spring (30) is designed such that in particular the stop is formed by the inside of a valve housing (15, 27) for the valve body (14, 24) and that the stop body (45) is preferably formed in one piece with the channel shaft (26). Discharge device according to one of the preceding claims, characterized in that the spring (30) is supported on one of the device units (2, 3) with an abutment body (45, 46) which differs in its cross sections from the spring cross sections (50) and in that the Abutment body (45, 46) is formed in one piece with the spring (30), that in particular the abutment body (45, 46) is supported in a ring on the base body (4, 5) of the associated device unit (2, 3) and that preferably the abutment body (45 , 46) limits a passage for the medium. Discharge device according to one of the preceding claims, characterized in that axially adjacent winding sections of the spring (30) interlock in at least one position, that in particular the winding sections engage in one another in the starting position and that preferably the spring (30) in an axial view spirally with mutually contact-free winding sections is. Discharge device according to one of the preceding claims, characterized in that one of the device units contains a discharge head (38) and a piston unit (20) with a piston shaft (21, 26, 36, 42), piston (19) and a valve seat, which are essentially in one piece are formed together that in particular a further piston (29) is arranged at an axial distance from the piston (19) on the piston shaft (26) and forms a displaceable valve body of a valve (33) and that preferably the discharge head (38) overlaps the other device unit (2) on the outside thereof. Discharge device according to one of the preceding claims, characterized in that one of the device units (2, 3) contains a housing (6), a valve seat of a valve (13) and a fastening member (56) for fastening it to a storage neck (62) which are formed in one piece with one another so that in particular the inner circumference of the housing (6) for at least one piston (19, 29) forms a running surface (17, 53), via which a return stroke stop (37) for the piston unit (20) radially inwards protrudes and that preferably the device unit (2) is penetrated by at least one ventilation opening (32) for the media store (60). Discharge device according to one of the preceding claims, characterized in that at least one pressure-dependent valve (13, 23) is provided and is designed as a plate valve with a plate-shaped valve body (14, 24), that in particular two valve bodies (14, 24) of two valves are approximately the same are formed and that preferably the valve body (14, 24) rests in one position on a bead cam such that at least one passage for the medium is formed between the latter and the valve body (14, 24). Discharge device according to one of the preceding claims, characterized in that a discharge head (38) with an adjoining an actuating shaft (26, 34, 42) and up to an outlet opening (40) for the medium continuous head channel (43) is provided, which is continuously limited in one part, that in particular to form an atomizer nozzle an end section of the head channel (43) adjoining the outlet opening (40) with profiles (64), such as grooves, webs or the like. is provided and that the discharge head (38) preferably forms a narrowed head section in the region of the outlet opening (40) which merges into a widened head section via a shoulder, the discharge head (38) having an outer jacket (44) extending from an end wall (44) 39) and at a radial distance within the outer casing (39) has a head shaft (42) which projects freely from the inside of the end wall (44). Discharge device, in particular according to the preamble of claim 1, characterized in that two first and second components (4, 14 and 5, 24 and 5, 78, respectively, movable from one another from a first position (70) to at least one second position (71) ) manufactured in one piece with each other and fixed in two layers (70, 71) by holding against each other and that in particular the first component (4, 5) for transferring the second component (14, 24, 78) directly from the first layer (70) to has a guide (22, 79) in the second layer (71). Discharge device according to claim 12, characterized in that the components (4, 14 or 5, 24 or 5, 78) in the first layer (70) in a connecting zone (75) via a connection (74) mutually fixed and in one piece with one another connected and in the second layer (70) with surfaces separate from the connection (74) are aligned with one another, in particular in the second layer (71) the connection (74) is separated and that the connection (74) is preferably at least one connecting member (76) with at least one predetermined breaking point, hinge zone or the like, both components limiting flow paths for the medium during the media discharge. Discharge device according to claim 12 or 13, characterized in that the second component (14, 24, 78) in the second position (70) can be moved in a stop-limited manner relative to the first component (4, 5), such as a base body, in particular the second Component is a control body (14, 24) for the media flow and that preferably the second component (14, 24) in the flow path of the medium has a closing surface (77) of a valve (13, 23) and the connecting zone (75) at a distance from the Closing surface (77). Discharge device according to one of claims 12 to 14, characterized in that the second component (78) in the second position is fixedly arranged on the first component (5), such as a base body, that in particular the second component is a nozzle body (78) of a media outlet (40) and that preferably the second component (14, 24, 78) is supported in the second layer (71) at a distance from the connecting zone (75) directly on the first component (4 or 5). Method for producing a discharge device (1) for media or the like with components (4, 14 or 5, 24 or 5, 78) aligned with one another in a functional layer (71), in which a unit made of injection molding in a manufacturing Mold is molded and then unmolded after solidification with separation from the mold, thereby characterized in that the structural unit (4, 14 or 5, 24 or 5, 78) is manufactured in one piece with two components and the components after the solidification of at least one of the components and in particular before the separation from the mold from the mutual production position (70) transferred to the functional position (71) and remaining secured against one another in this position.

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