EP3689472A1 - Nozzle head for a spray pump and spray pump with the nozzle head - Google Patents

Abstract

The invention relates to a nozzle head (12) for a spray pump, preferably a finger-operated spray pump, with a pump head (4), a receiving pin (38) in the pump head (4) and a cap (39) having a spray nozzle (48), which in the Pump head (4) is latched in association with the receiving pin (38), the receiving pin (38) having a longitudinal axis (y) extending in the plug-on direction of the cap (39) and a fluid path (41) in the direction in the receiving pin (38) of the longitudinal axis (y), which leads to a central chamber (53) upstream of the spray nozzle, the central chamber (53) further having inlet channels (50) which extend in a plane running perpendicular to the longitudinal axis (y) and which partly through an inner surface of the cap (39) and partially formed by an outer surface of the receiving pin (38), the boundary surfaces of the inlet channels (50), with the exception of a bottom surface, being formed exclusively in the cap (39) Are det and the receiving pin (38) has a closed flat end face (40) which is also used to form the boundary surfaces of the inlet channels (50). For an advantageous design of the nozzle head, the invention provides that the end face (40) is surrounded by a circumferential surface (42) which runs in a stepped manner and extends at least over the circumferential angle at which the inlet channels (50) are spaced apart from one another the inlet channels (50) open radially on the outside into an annular channel (52) which is established in the cap assignment position and which, according to the circumferential surface (42), results in a side wall (54, 55) of an inlet channel (50) passing through an in the cap (39 ) formed rib (49) and that the continuous rib (49) in the circumferential direction with reference to a longitudinal axis (y) viewed both the inner and the outer side wall of each inlet channel (50) and above a radially outer connecting wall between the outer Forms side wall and the inner side wall of each inlet channel (50). Furthermore, the invention relates to a spray pump with a nozzle head as described attitude.

Description

Technical field

The invention relates to a nozzle head according to the features of the preamble of claim 1. The invention further relates to a spray pump with the nozzle head according to the features of claim 5.

Nozzle heads of the type in question are known. It is, for example WO 2012/110744 A1 referred. Such nozzle heads serve to spray the medium when the spray pump is actuated, with swirling of the medium being achieved in the nozzle head in the region of the central chamber before being dispensed.

From the DE 60217585 T2 a nozzle head is known in which the receiving pin is completely cylindrical with respect to its circumferential surface. From the EP 711571 A1 a nozzle head is known in which the receiving pin has a stepped circumferential surface. Sting channels are formed in the cap, which run radially outwards.

In addition, the US 2008/0067262 A to refer.

Starting from the state of the art, the invention is concerned with the task of specifying an advantageous nozzle head for a spray pump and a spray pump equipped in this way.

This object is achieved with regard to the nozzle head in the subject matter of claim 1, with the aim being that the end face is surrounded by a circumferential surface which extends in a stepped manner and which faces one another At least over the circumferential angle at which the inlet channels are spaced from one another, extends that the inlet channels open radially on the outside into an annular channel which is established in the cap assignment position and which, according to the peripheral surface, results in a side wall of an inlet channel being formed by a rib formed in the cap and that the continuous rib, viewed in the circumferential direction with respect to a longitudinal axis, forms both the inner and the outer side wall of each inlet channel and above it forms a radially outer connecting wall between the outer side wall and the inner side wall of each inlet channel.

With regard to the spray pump, the object is achieved with the subject matter of claim 5.

The end face, which is also used to form the boundary surfaces of the inlet channels, can form the bottom surface of each inlet channel when the cap is arranged.

The graduated circumferential surface forms, at least over a partial circumference, a circumferential feed channel for the feed channels, which feed channel is connected to the liquid path in the region of the receiving pin in the direction of the longitudinal axis.

The feed channel running in the circumferential direction can only be formed when the cap is arranged on the receiving pin. With respect to a cross section transverse to an extension direction of the circumferential feed channel, a bottom and a side surface can be formed by the receiving pin and the further side surface and the top surface by the cap.

The inlet channels have fluid axes with respect to the central chamber. These can run tangentially to a circle, the center of which is formed by the longitudinal axis of the locating pin. This circle can have a maximum diameter, which can correspond to the diameter of the preferably circular central chamber. In a further embodiment, the circle in which the fluid axes of the inlet channels enter tangentially is chosen to be smaller than a circle given by the circumferential wall of the central chamber. Thus, in a cross section transverse to the longitudinal axis, the orientation of the inlet channels can be selected such that a side wall running in the longitudinal extension of the inlet channel merges tangentially into the chamber wall when the inlet channel freely enters the central chamber.

The radius of the circle can be smaller than a largest dimension of the central chamber transverse to the longitudinal axis. The diameter of the circle is equal to or smaller than a circle which is laid out in the central chamber in the plan, which circle then at best touches the wall of the central chamber.

A side wall of an inlet channel can be formed by a rib formed in the cap. Such a rib projects beyond a ceiling surface formed by the cap for an inlet channel in the axial direction and is supported in the assigned position on the end face of the receiving pin which forms the base surface for the inlet channel. A seal for the positive guidance of the medium to be dispensed via the at least partially circumferential feed channel through the inlet channels and the central chamber is provided by preferably flat contact of the rib forming the side wall of an inlet channel on the end face of the receiving pin.

The inflow channels, as well as the central chamber, if necessary, can essentially be provided by the cap in terms of length and / or cross-sectional dimensions. The design of the cap accordingly makes a significant contribution to the design, orientation and size (cross-sectional area) of the inlet channels, these inlet channels ultimately only being formed on the receiving pin when the cap is in the assigned position.

As a result of this configuration, different caps with different inlet channels can be assigned to a nozzle head, for example adapted to the medium to be dispensed and / or adapted to the desired spraying result. With regard to the inlet channels, the caps can differ, for example, with regard to the number of inlet channels, their cross-sectional area transverse to the longitudinal extent of the inlet channels or their orientation relative to the central chamber to be formed.

To achieve different spray results and / or to discharge different sprayable media, the arrangement of an adapted cap is sufficient.

Support areas can also be separated at least in the sealing position in the vertical direction by a horizontally surrounding free space. This free space, which can, for example, form an annular channel and run at least approximately coaxially to the pump piston axis, preferably results between the outer surface of the piston rod and the inner surface of the pump piston facing the piston rod, wherein the free space can also be provided solely due to a corresponding recess between the support regions in the area of the inner surface of the pump piston or solely through such a recess in the area of the outer surface of the piston rod. Furthermore the free space can also be given according to corresponding recess areas with respect to the assigned outer or inner surface both on the piston rod and on the pump piston.

The spray pump, the preferably finger-operated spray pump, has a nozzle head in one of the configurations described here.

The pump housing of the spray pump can have a guide part, furthermore an outlet nozzle and a pump chamber, the pump chamber having an inlet valve and an outlet valve. The spray pump may further include a piston rod, a pump piston, a first spring that acts between the piston rod and the pump piston, and a second spring that acts between the piston rod and the pump housing. The pump piston is displaceable relative to the piston rod to form the outlet valve, between a sealing position and an open position. In the sealing position, the pump piston lies against a sealing extension of the piston rod. In the open position, the pump piston allows media to pass between the sealing extension and the pump piston. In the sealing position, as well as in the open position, the pump piston can be supported on two axially spaced apart areas on an outer surface of the piston rod.

In the case of a preferably still compact design of the pump, the pump piston can be securely guided on the outer surface of the piston rod both in the sealing position and in the opening position, as well as in any position between the sealing position and the opening position. The support on (at least) two axially spaced apart areas counteracts a possible tilting of the pump piston from a strict alignment of the piston axis relative to a central piston rod axis. Rather, the axially spaced support preferably provides a coaxial alignment of the piston rod and the pump piston in every possible working position of the pump piston relative to the piston rod. The safe dispensing of reproducible quantities of the medium to be sprayed is ensured by the tilt-proof arrangement of the pump piston.

The first spring and the second spring can be supported on the piston rod on a radially projecting shoulder. The shoulder can extend in a plane oriented transversely to the piston rod axis. Furthermore, the shoulder can be firmly connected to the piston rod or can also be produced in one piece with it, for example in a plastic injection molding process.

In a preferred embodiment, the shoulder for guiding the piston rod interacts with a cylindrical inner surface of the guide part on the pump housing side, the springs also being radially exposed in their support regions on the piston rod with respect to the guide part. When viewed from the radially inner wall of the guide part in the direction of a central body axis of the guide part, which preferably coincides with the piston rod axis, the springs are exposed. A radially outer coverage of the springs is given solely by the guide part or by the associated wall of the guide part.

In addition, a radially outer end face of the shoulder can rest on the inner surface of the guide part in the starting position and in the spraying position, moreover preferably in any intermediate position between the starting and spraying positions. For this purpose, the shoulder, with its radially outer end face, preferably forms a circular-cylindrical surface with a height viewed in the axial direction that is one fifth to one third, for example one Quarter of the shoulder radial dimension. In this way, the piston rod is also guided in the guide part without tilting.

In one configuration, the piston rod can be composed of a central piston rod part and an outer piston rod cylinder part. The piston rod part and the piston rod-cylinder part are preferably firmly connected to one another at least with regard to the axial alignment, so that no relative displacement in the axial direction can occur.

The piston rod part and the piston rod cylinder part can, as is also preferred — viewed transversely to the piston rod axis — have essentially circular cylindrical cross sections.

The piston rod-cylinder part can have a taper at its piston end, which further merges into a support shoulder that extends further radially with respect to the taper. The tapering can, as is also preferred, result in the horizontally circumferential free space between the axially spaced support regions of the pump piston. For example, the pump piston, in particular a pump piston shaft, can be supported axially above and below the taper.

The taper can also be assigned to a radially inner shoulder of the pump piston, which shoulder comes into contact with a flank of the taper on the spray head side in the spray position. This can limit the relative displacement of the pump piston to the piston rod.

In a further embodiment, the shoulder of the pump piston can come into contact with the flank of the taper facing the inlet valve side in the starting position.

The sealing extension for interaction with the pump piston can be formed on the central piston rod part. In this regard, a one-piece, possibly also material-uniform design of the piston rod part and sealing extension can be provided.

In a further embodiment, the central piston rod part can be latched in the piston rod cylinder part. This locking connection is preferably not operationally releasable. The latching connection preferably results in a fixed connection between the piston rod part and the piston rod-cylinder part, at least in the axial direction. In addition, a locking connection between the parts which is rotationally fixed with respect to the longitudinal axis of the piston rod can also be achieved by the latching arrangement.

The preferred composition of the piston rod from a central piston rod part and an outer piston rod cylinder part results in a preferred embodiment in a medium path between an outer surface of the central piston rod part and an inner surface of the piston rod cylinder part. The medium path can be formed at least in the area in which the cylinder part surrounds the rod part in a cross section transverse to the longitudinal extension of the piston rod in the form of an annular segment.

The circumferential piston wall of the pump piston can be supported on the inner wall of the guide part at least in two regions spaced apart in the axial direction. This is also the Pump piston prevented from tilting about the longitudinal axis of the piston rod.

Brief description of the drawings

Fig. 1

in einer Längsschnittdarstellung eine Fingerspraypumpe in Crimpverbindung mit einem Behältnis, die unbetätigte Stellung der Fingerspraypumpe betreffend;

Fig. 2

die Herausvergrößerung des Bereiches II in Figur 1;

Fig. 3

einen gegenüber Figur 1 um etwa 90° um die Längsachse der Fingerspraypumpe geschnittene Darstellung, ebenfalls die unbetätigte Stellung betreffend;

Fig. 4

eine der Figur 1 entsprechende Darstellung, jedoch eine Zwischenstellung im Zuge der Betätigung der Fingerspraypumpe betreffend;

Fig. 5

eine Folgedarstellung zu Figur 4, die Pumpendstellung betreffend;

Fig. 6

die Herausvergrößerung des Bereiches VI in Figur 5;

Fig. 7

eine der Figur 2 entsprechende Darstellung, die Pumpendstellung gemäß Figur 5 betreffend;

Fig. 8

die Herausvergrößerung des Bereiches VIII in Figur 1;

Fig. 9

eine perspektivische Detaildarstellung betreffend den Bereich einer düsenkopfseitigen Aufnahme für eine Kappe mit Blick auf einen Aufnahmezapfen;

Fig. 10

in perspektivischer Darstellung die dem Düsenkopf zuordbare Kappe mit Blick auf eine Innenseite der Kappe ausgeformte Rippenanordnung zur Bildung von Zulaufkanälen;

Fig. 11

die Kappe gemäß Figur 10 in Ansicht mit Blick auf das Kappeninnere.

The invention is explained in more detail below with reference to the accompanying drawing, which only represents an exemplary embodiment. It shows:

Fig. 1

in a longitudinal sectional view a finger spray pump in crimp connection with a container relating to the unactuated position of the finger spray pump;

Fig. 2

the enlargement of area II in Figure 1 ;

Fig. 3

one opposite Figure 1 cut through about 90 ° around the longitudinal axis of the finger spray pump, also relating to the unactuated position;

Fig. 4

one of the Figure 1 corresponding representation, but regarding an intermediate position in the course of actuating the finger spray pump;

Fig. 5

a follow-up presentation Figure 4 , regarding the pump end position;

Fig. 6

the enlargement of area VI in Figure 5 ;

Fig. 7

one of the Figure 2 corresponding representation, the pump end position according to Figure 5 concerning;

Fig. 8

the enlargement of area VIII in Figure 1 ;

Fig. 9

a detailed perspective view of the area of a nozzle-side receptacle for a cap with a view of a receiving pin;

Fig. 10

a perspective view of the cap assignable to the nozzle head with a view of an inside of the cap shaped rib arrangement for forming inlet channels;

Fig. 11

the cap according to Figure 10 in view with a view of the inside of the cap.

Description of the embodiments

Is shown and described initially with reference to Figure 1 a finger spray pump 1 for spray discharge of a medium M, in particular a liquid medium.

The finger spray pump 1 is designed to be arranged on a container 2 storing the medium M, with a container neck 3 to which the finger spray pump 1 is essentially fixed.

The finger spray pump 1 has a finger-operated pump head 4 with an actuating surface 5 which, in the exemplary embodiment shown, extends essentially transversely to a central body axis x of the finger spray pump 1 and also in the assigned state transversely to the body axis of the container 2.

The pump head 4 is furthermore approximately pot-shaped, with a pot opening pointing downward.

On the underside of the actuating surface 5, a piston rod 6 is provided centrally and rotationally symmetrically with respect to the body axis x, which extends approximately from the pump head cover offering the actuating surface 5 beyond the plane of the pot opening and projects into the region of the container neck 3 in the assigned position.

The piston rod 6 can, as is also preferred, be formed in two parts, in particular having a central piston rod part 7 and an outer piston rod cylinder part 8.

Piston rod part 7 and piston rod-cylinder part 8 are arranged concentrically with respect to the body axis x.

The overall piston rod-cylinder part 8, which is tubular in the direction of extension of the body axis x, is held on the pump head 4 in the area of a receptacle 9 which is formed in one piece and preferably in the same material as the pump head cover and the pump head wall. The receiving bush 9 comprises the assigned end of the piston rod cylinder part 8. In this area there is a latching between the piston rod cylinder part 8 and the receiving bush 9.

While the inner wall surface of the piston rod cylinder part 8 is preferably circular in a cross section transverse to the body axis x, in a preferred embodiment, in the same section with respect to the piston rod part 7, there is an out-of-round cross section, for example an essentially rectangular cross section, with two having opposite cross sections End faces can have a wall profile adapted to the curvature of the inner wall of the piston rod cylinder part 8. The cross section of the piston rod part 7 in the area of penetration of the cylinder part can result, for example, from a circular disk shape which is trimmed secant-like on both sides of a geometric center line.

This results in a cross section (cf. Figure 3 ) at least one medium path 10 between the inner wall of the piston rod cylinder part 8 and the outer wall of the piston rod part 7, further preferably two medium paths 10 diametrically opposite with respect to the body axis x.

The piston rod 6 is held in the overlap area of the receiving bushing 9 and the piston rod cylinder part 8 on the latter on the inside of the wall. Thus, the piston rod part 7 is fixed to the piston rod cylinder part 8 at least in the direction of extension of the body axis x.

The piston rod 6 is held in the piston rod cylinder part 8 against tipping by the sections adjoining the media paths 10 in the circumferential direction and adapted to the inner diameter of the piston rod cylinder part 8.

The medium paths 10 preferably extend over the entire axial extension length of the piston rod 6, in particular in the entire overlap area of the piston rod part 7 and piston rod-cylinder part 8. The medium paths 10 open on the underside of the actuating surface, more preferably inside the receiving bushing 9, into a radial channel 11 on the pump head side, the latter in turn opens into a nozzle head 12.

The radial channel 11 is an extension of the medium path and thus part of the same.

At the end facing away from the pump head 4, the piston rod part 7 has a plate-like end which widens radially all round with respect to the piston rod part 7 and also with respect to the piston rod cylinder part 8. This forms a sealing extension 13 in the form of a piston crown of a further provided pump piston 14.

Overall, the sealing extension 13 is plate-shaped, with a downward, i.e. The peripheral extension edge 15 facing away from the pump head 4 and which, viewed in the direction of extension of the body axis x, projects beyond an undersurface of the sealing extension 13 pointing in the same direction.

In the direction of the pump head 4, a depression 16 is provided on the upper side of the sealing extension 3, surrounding an end portion of the piston rod part 7 that is radially widened relative to the piston rod part 7 or the inner diameter of the piston rod cylinder part 8.

The pump piston 14 is arranged to be movable in a pump cylinder 17 along the body axis x.

The pumping piston 14 has a bottom section, which is essentially penetrated by the piston rod part 7 and further essentially by the enlarged foot-side section of the piston rod part 7 and is oriented transversely to the body axis x and on which a piston wall 18 is formed, radially on the outside, around the periphery to the direction of extension of the body axis x - both above and below the pump piston-side bottom section.

These piston wall sections are interrupted in the axial direction approximately at the level of the base section by a circumferential radial depression with respect to their radially outer peripheral surface, so that axially spaced, circumferential sealing zones interact with the cylinder inner wall of the pump cylinder 17.

The sealing extension 13 extends in the state of use and according to the representations below the bottom portion of the pump piston.

Facing the sealing extension 13, on the bottom side of the pump piston 14, in particular on the edge side of the central opening of the pump piston 14 penetrated by the piston rod part 7, a sealing collar 19 is formed which tapers conically in the direction of the sealing extension 13 and in the direction of the body axis x and leaves the opening as such. This sits in a starting position Figure 1 sealing in the facing circumferential depression 16 of the sealing extension 13.

Averted from the sealing extension 13, starting from the bottom section of the pump piston 14, a preferably circular cylindrical guide section 20 is formed in one piece and preferably with the same material. The inside diameter thereof is first and essentially adapted to the outside diameter of the piston rod cylinder part 8.

The pump cylinder 17 opens axially upwards in the direction of the pump head 4, with the relevant end of the pump cylinder 17 radially enclosing the piston rod 6 as a whole. In the unactuated pump head position according to Figure 1 extends an edge edge of the pump cylinder 17 pointing axially upward, preferably at an axial distance from the edge edge of the pump head 4 directed downward.

The axially upward free end region of the pump cylinder 17 is formed radially on the inside for locking a guide part 21. The guide part 21 has a circular cross section which is essentially matched to the inner wall of the pump cylinder 17 and extends further radially inward of the pump cylinder latching section.

In addition, the guide part 21 is supported by a radial collar 22 on the facing front edge of the pump cylinder 17.

Starting from this radial collar 22, extends a collar 23 which extends coaxially to the body axis x and which leaves a circumferential space in relation to the piston rod 6.

The finger spray pump 1 shown can be designed for crimp connection to the container 2. A bounce connection can also be provided, in addition a screw connection.

A crimp connection is shown in the figures, for which purpose a crimp sleeve 24 is provided, which at the same time comprises the guide part 21 and the pump cylinder 17, at least in the region of the interaction of the guide part 21 and the latching region of the pump cylinder 17.

The crimp sleeve 24 encompasses the container neck 3, wherein the finger spray pump 1 is supported on the end face of the container neck 3 via the crimp sleeve 24, preferably with the interposition of a sealing washer 25.

The piston rod 6 is guided over a shoulder 26 formed on the piston rod cylinder part 8 in the guide part 21, due to this interaction the circumferential shoulder end face with the cylindrical inner surface of the guide part 21.

In an initial position of the finger spray pump 1 according to Figure 1 A surface of the shoulder 26 pointing in the direction of the pump head 4 extends at least approximately in the opening plane of the guide part 21 encompassed by the collar 23 of the guide part 21.

Springs, in particular return springs, are preferably arranged in the circumferential space resulting between the guide part 21 and the piston rod-cylinder part 8. As also shown, these can be cylinder compression springs.

A first spring 27 (piston spring) is thus initially provided, which supports the piston rod cylinder part 8 on one side on the underside on the shoulder 26 and on the other side acts on the guide section 20 of the pump piston 14.

A second spring 28 (pump head spring) is provided coaxially with this first spring 27 and surrounds the first spring 27 with an enlarged diameter. This second spring 28 is supported on a radial step of the guide section 20, which also offers a radially inner guide for the pump piston 14, and acts on the underside against the shoulder 26 and via this on the pump head 4.

The spring constant of the first spring 27, that is to say the piston spring, can be selected to be greater than the spring constant of the second spring 28 (pump head spring).

The sealing extension 13, in particular its depression 16, forms an outlet valve A in cooperation with the sealing collar 19 of the pump piston 14.

In the area of the pump cylinder base 29, an inlet valve E is formed, preferably in the form of a ball valve, to which a connection for a suction tube 30 is connected on the underside. This dips into the inside of the container.

A pump chamber 31 is set in the pump cylinder 17 between the pump cylinder base 29 having the inlet valve E and the pump piston 14.

The end of the piston rod cylinder part 8 facing the pump piston 14 is provided with a taper 32 in the form of a circumferential, radially inward constriction which, towards the end of the cylinder part 8, merges again into a support shoulder 33 which extends further radially with respect to the taper 32. The latter can have an outer diameter which corresponds to that of the piston rod-cylinder part 8 in the region encompassed by the springs 27 and 28.

With reference to a longitudinal section through the area of the taper 32 as shown in FIG Figure 2 there is a flank 34 on the pump head side, which extends at an acute angle of 30 to 60 °, approximately 45 °, to a plane viewed transversely to the body axis x.

The taper 32 of the piston rod 6, here in particular the piston rod cylinder part 8, is assigned to a radially inner shoulder 35 of the pump piston 14 in the region of its guide section 20. This shoulder 35 dips into the resulting circumferential annular space in the region of the taper 32, regardless of the position of the pump head 4 (starting position or spray position).

This results in a circumferential clearance in the area of interaction between the pump piston 14 and the piston rod 6 or the guide section 20 on the pump piston side and the piston rod-cylinder part 8, which separates two axially spaced support areas 36 and 37.

Through the axially spaced support regions 36 and 37, the pump piston 14 is guided in a tilt-proof manner on the piston rod 6, while maintaining an axial displacement of the pump piston 14 relative to the piston rod 6. This relative axial displacement can, as is preferred, be stop-limited, e.g. , as also shown, by supporting the pump piston 14 over the shoulder 35 on the respectively assigned flank in the area of the taper 32.

The pump head 4 can be covered by a cover cap in the non-use position.

For spray discharge of the medium M, the pump head 4 is displaced downward against the force of the pump head spring (second spring 28) along the body axis x, against the force of the pump head spring (second spring 28), due to the application of pressure, relative to the fixed guide part 21 and the pump cylinder 17.

The first spring 27 (piston spring), which is stronger than the second spring 28 (pump head spring), initially loads the pump piston 14 in the closed position of the outlet valve A, in that the piston wall 18 is forced into the sealing position with respect to the sealing extension 13.

Only when a pressure exceeding the spring force of the piston spring (first spring 27) is reached in the pump chamber 31 below the pump piston 14 in the pump cylinder 17 is the spring force of the piston spring (first spring 27) overcome, which leads to a relative displacement of the piston rod 6 with the sealing extension 13 leads to the pump piston 14 (cf. Figure 5 ).

As a result of maintaining the pressure on the pump head 4 and the associated continuous depression thereof, the medium M is discharged through the opened outlet valve A and the medium path 10 now connected to the pump chamber 31. The medium M is sprayed out under pressure via the nozzle head 12 until the pump piston 14, which moves in the open state of the outlet valve A via the first spring 27 (piston spring), reaches the lowered position in a stop-limited manner.

After the medium M has been discharged, the system automatically returns to the starting position according to FIG. 1 when there is no action on the pump head 4, as a result of the corresponding return of the pump head 4 with its piston rod 6 and sealing extension 13 via the pump head spring (second spring 28) and the pump piston 14 via the piston spring (first spring 27), the provision being made via the stronger piston spring so as to close the exhaust valve A prematurely.

In the course of the displacement of the pump piston 14 into the starting position, medium M is fed in via the inlet valve E that opens due to the suction effect, and the suction tube 30 for refilling the pump chamber 31.

The Figures 8 to 10 show a possible configuration of the nozzle head 12.

The nozzle essentially consists of a receiving pin 38 assigned to the radial channel 11 and a cap 39 which can be arranged thereon.

As also shown, the receiving pin 38 can be formed in one piece and of the same material as the pump head 4, in this case essentially aligned along a longitudinal axis y directed transverse to the body axis x.

A flat, closed end face 40 is formed on the receiving pin 38 transversely to this axis y and pointing radially outward.

In the receiving pin 38 in the direction of the longitudinal axis y of the radial channel 11 is formed as a liquid path 41. This radial channel 11 extends with respect to a cross section transverse to the longitudinal axis y, starting from the circumferential outer surface of the receiving pin 38 in a groove-like manner radially inward.

The end face 40 of the receiving pin 38 is surrounded by a circumferential surface 42 which extends in a stepped manner therefrom. As also shown, this can result in the entire circumference, interrupted by the liquid path 41.

The assignable cap 39 is pot-shaped, with a cap base 43 and a circumferential cap wall 44.

The cap 39 can be plugged onto the locating pin 38 or can be held in place on the wall of the pump head 4 surrounding the locating pin 38 with a radial spacing. For this purpose, the cap wall 44 has on the outside of the wall Locking projections 45 on to cooperate with a locking groove 46 aligned coaxially to the longitudinal axis y.

The inner wall of the cap wall 44 forms in the assigned position in accordance with Figure 8 the further guide path in the direction of extension of the longitudinal axis y for the medium M by correspondingly covering the radial free cut of the receiving pin 38 to form the liquid path 41.

In the rest position according to Figure 8 the cap 39 lies with a section of the cap wall 44 facing the cap bottom in sealing contact with the circumferential facing wall inner surface of the pump head 4. A first sealing surface 47 is thus created.

The lower surface of the cap base 43 facing the pin-side end surface 40 preferably runs parallel and at an axial distance from the end surface 40. The cap base 43 is penetrated centrally by a spray nozzle 48.

A rib 49 is formed on the underside of the cap base 43 and, as shown in FIG Figure 10 Inlet channels 50 running through the floor plan, three in the exemplary embodiment shown, laterally limited.

The cap 39 is supported in the associated position Figure 8 from the rib 49 on the end face 40 of the receiving pin 38. The result is a second sealing surface 51.

The inlet channels 50 are laterally limited in a cross section transverse to their longitudinal extension by portions of the rib 49 and delimited on the upper side by the cap bottom 43. Only the arrangement of the cap 39 on the Receiving pin 38 leads to the complete enclosure of an inlet channel 50 using the end face 40 on the pin side as the channel bottom.

The inlet channels 50 open radially on the outside into an annular channel 52 which is set in the cap assignment position. This results from the stepped circumferential surface 42.

In order to achieve a favorable swirling of the medium M before it emerges through the spray nozzle 48, the guide channels 50 run tangentially to a central chamber 53 formed between the end face 40 and the cap base 43 in a plane transverse to the longitudinal axis y.

The central chamber 53 is preferably aligned coaxially to the longitudinal axis y, correspondingly having a circular cylindrical wall into which wall the inlet channels 50 openly enter. With respect to a floor plan, a lateral boundary wall, which is formed by the rib 49, preferably runs tangentially into the ring wall of the central chamber 53 (cf. Figure 10 ).

The inlet channels 50 are arranged in an angular distribution evenly distributed in plan around the longitudinal axis y.

When viewed in the circumferential direction with respect to the longitudinal axis y, the continuous rib forms both the inner and the outer side wall of each inlet channel 50 and, moreover, a radially outer connecting wall between the inner and outer wall.

The cap 39 preferably sits on the end face 40 with the entire rib surface directed towards the receiving pin 38.

The sealing surfaces 47 and 51 provide a targeted entry of medium through the liquid path 41 and the inlet channels 50 into the central chamber 53, from which the medium M can emerge swirled through the spray nozzle 48.

Figure 11 shows the possible arrangement and orientation of the inlet channels 50. Each inlet channel 50 has a fluid axis a directed in the direction of the central chamber 53. These (here three) fluid axes a run tangentially into a circle K in the area of the central chamber 53, the center of which is formed by the longitudinal axis y. The circle K in this case has a diameter which is smaller than the diameter of the central chamber 53 which is not influenced by the inlet channels 50 and which is considered in relation to the longitudinal axis y. The circle K can moreover be dimensioned larger than the free diameter or a large dimension transversely to the longitudinal axis y of the spray nozzle 48.

With reference to the floor plan in Figure 11 the side walls 54 arranged downstream of the fluid axes a in the clockwise direction run tangentially into the wall of the central chamber 53. The side walls 55 arranged upstream in the clockwise direction with respect to the fluid axes a can run parallel to the side walls 54. An arrangement is shown in which a side wall 55 encloses an acute angle of, for example, 10 to 30 °, further, for example, approximately 15 °, to the associated side wall 54 of the same inlet channel 50.

All side walls 54 and 55 can be formed by the completely circumferential rib 49. <b> List of reference symbols </b> 1 Finger spray pump 29 Pump cylinder bottom 2nd container 30th Suction tube 3rd Container neck 31 Pumping chamber 4th Pump head 32 rejuvenation 5 Operating area 33 Support shoulder 6 Piston rod 34 Flank 7 Piston rod part 35 shoulder 8th Piston rod cylinder part 36 Support area 9 Receptacle 37 Support area 10th Mediumweg 38 Locating pin 11 Radial channel 39 cap 12th Nozzle head 40 Face 13 Sealing extension 41 Fluid path 14 Pump piston 42 Circumferential surface 15 Appendage edge 43 Cap bottom 16 Sinking 44 Cap wall 17th Pump cylinder 45 Locking projection 18th Piston wall 46 Locking groove 19th Sealing collar 47 Sealing surface 20 Guide section 48 Spray nozzle 21 Guide part 49 rib 22 Radial collar 50 Inlet channel 23 collar 51 Sealing surface 24th Crimp sleeve 52 Ring channel 25th Sealing washer 53 Central chamber 26 shoulder 54 Side wall 27 first spring 55 Side wall 28 second spring a Fluid axis x Body axis y Longitudinal axis A outlet valve E Inlet valve K circle M medium

Claims (15)

Nozzle head (12) for a spray pump, preferably a finger-operated spray pump, with a pump head (4), a receiving pin (38) in the pump head (4) and a cap (39) having a spray nozzle (48) which is in the pump head (4) is held in association with the receiving pin (38), the receiving pin (38) having a longitudinal axis (y) extending in the plug-on direction of the cap (39) and in the receiving pin (38) a fluid path (41) in the direction of the longitudinal axis (y ) which leads to a central chamber (53) upstream of the spray nozzle, the central chamber (53) further having inlet channels (50) which extend in a plane running perpendicular to the longitudinal axis (y) and which partly extend through an inner surface of the cap (39) and are partially formed by an outer surface of the receiving pin (38), the boundary surfaces of the inlet channels (50) with the exception of a bottom surface being formed exclusively in the cap (39) and the receiving pin en (38) has a closed flat end face (40) which is also used to form the boundary surfaces of the inlet channels (50), characterized in that the end face (40) is surrounded by a circumferential surface (42) which extends in a stepped manner therefrom extends, at least over the circumferential angle at which the inlet channels (50) are spaced from one another, that the inlet channels (50) open radially on the outside into an annular channel (52) which is established in the cap assignment position and which results from the peripheral surface (42), that a side wall (54, 55) of an inlet channel (50) is formed by a rib (49) formed in the cap (39) and that the continuous rib (49) in the circumferential direction with respect to a longitudinal axis (y) considers both the inner one as well as the outer side wall of each inlet channel (50) and a radial one above it forms an outer connecting wall between the outer side wall and the inner side wall of each inlet channel (50). Nozzle head according to one of claims 1, characterized in that the inlet channels (50) relating to the central chamber (53) have fluid axes (a) which are tangent to a circle (K), the center of which is formed by the longitudinal axis (y). Nozzle head according to claim 2, characterized in that a radius of the circle (K) is smaller than a largest dimension of the central chamber (53) transverse to the longitudinal axis (y). Nozzle head according to one of the preceding claims, characterized in that all side walls (54, 55) are formed by a continuous rib (49). Spray pump, preferably finger-operated spray pump (1), for spray discharge of a medium (M), with a finger-operated pump head (4) which can be displaced relative to a pump housing between a spray position and an initial position, characterized by a nozzle head according to one of claims 1 to 4 . Spray pump according to claim 5, characterized in that the pump housing has a guide part (21), further with an outlet nozzle, a pump chamber (31), the pump chamber (31) having an inlet valve (E) and an outlet valve (A), a piston rod (6), a pump piston (14), a first spring (27), which acts between the piston rod (6) and the pump piston (14), and a second spring (28), between the piston rod (6) and the pump housing works, whereby the Pump piston (14) for forming the outlet valve (A) can be displaced to a limited extent relative to the piston rod (6), between a sealing position and an open position, the pump piston (14) resting on a sealing extension (13) of the piston rod (6) in the sealing position and in the open position allows a media passage between the sealing extension (13) and the pump piston (14), the pump piston (14) in the sealing position, as well as in the open position, on two axially spaced apart areas (36, 37) on one The outer surface of the piston rod (6) is supported. Spray pump according to one of claims 5 or 6, characterized in that the support areas (36 and 37) are separated at least in the sealing position in the vertical direction by a horizontally circumferential free space. Spray pump according to one of claims 5 to 7, characterized in that the first spring (27) and the second spring (28) on the piston rod (6) are supported on a radially projecting shoulder (26) and the shoulder (26) for guidance the piston rod (6) cooperates with a cylindrical inner surface of the guide part (21) on the pump housing side, the springs (27 and 28) also being radially exposed in their support areas on the piston rod (6) with respect to the guide part (21). Spray pump according to claim 8, characterized in that a radially outer end face of the shoulder (26) in the initial position and in the spray position bears against the inner surface of the guide part (21). Spray pump according to one of claims 5 to 9, characterized in that the piston rod (6) is composed of a central piston rod part (7) and an outer piston rod cylinder part (8). Spray pump according to claim 10, characterized in that the piston rod-cylinder part (8) has a taper (32) at its piston end, which continues at the end into a support shoulder (33) which extends radially with respect to the taper (32). Spray pump according to Claim 11, characterized in that the taper (32) is assigned to a radially inner shoulder (35) of the pump piston (14) which, in the spray position, comes into contact with a flank (34) of the taper (32) on the spray head side. Spray pump according to one of claims 5 to 12, characterized in that the sealing extension (13) is formed on the central piston rod part (7). Spray pump according to one of Claims 10 to 13, characterized in that the central piston rod part (7) is latched in the piston rod cylinder part (8). Spray pump according to claim 14, characterized in that there is a medium path (10) between an outer surface of the central piston rod part (7) and an inner surface of the piston rod cylinder part (8).

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