DE102007024723A1 - Dispensing device for storing and releasing soap and creams comprises a headpiece coupled with a component which is separate from the headpiece and the dispenser plunger - Google Patents

Abstract

Dispensing device comprises a headpiece (18) coupled with a component (50) which is separate from the headpiece and the dispenser plunger (20). The separate component interacts in a sealing manner with a first sealing surface (52) of the plunger and/or a second sealing surface (54) of the headpiece and forms a sealing section (56) or supports a sealing section. Preferred Features: The sealing section is made from a first material, preferably a rubber-like material or a thermoplastic elastomer. The separate component is held on the dispenser head using a locking device.

Description

The The invention relates to a dispenser device for receiving and dispensing of pasty products.

A such dispenser device may also be referred to as a dispenser system become. Such dispenser devices or dispenser systems can, for example for taking and dispensing soaps, creams and the like be used. They can also be referred to as a cream dispenser become. But such donor devices can also for dispensing liquid products, such as disinfecting Liquids are used.

Known Dispenser devices of the type mentioned often have one Container for receiving a pasty Product, as well as one facing away from the bottom of the container End of the container arranged dispenser head, which on the container is held. This dispenser head has a head piece on, as well as a dispenser piston, for example, as a pump piston can be designated. Both the head piece and the dispenser piston is relatively displaceable relative to the container arranged. Furthermore, the addressed dispenser piston is relatively displaceable arranged opposite the head piece. In the dispenser head is - in usually in the container-facing end - a Delivery chamber formed. This delivery chamber can thereby via a valve or a valve disc from the container interior be disconnected, this valve opens when the pressure inside the container exceeds the pressure in the delivery chamber or exceeds a predetermined minimum amount. The dispenser piston is formed in such devices usually as a hollow piston and longitudinally displaceable in the dispenser head. The dispenser head usually has an output channel in such devices on. Cooperatively make up the dispenser head and the dispenser piston often a slide valve. This is often designed so that the dispenser piston at its the bottom of the container opposite end is closed on the front side, and on one to this end face adjacent section radial outlet openings having. The output channel of the head ends doing so in the radial direction in the displacement of the dispenser piston. The dispenser piston is so opposite the head piece relatively displaceable, that he so in the direction of the tank bottom can be made that its remote from the tank bottom End face a fluid connection between the piston interior and the Output channel of the header interrupts. With appropriate Relative displacement of the dispenser piston relative to the head piece in the direction of the container bottom facing away - or in other words, with a movement of the dispenser piston upwards (opposite the head piece) - can the Dispenser piston assume positions in which the radial outlet openings the dispenser head communicate with the output channel, so that a Fluid communication between the dispensing channel and the interior of the dispensing piston given is.

A dispenser device designed essentially in accordance with the above description is known from US Pat EP 1 399 370 B1 known. In such designs, two seals are often involved in the slide valve, wherein it should be noted that in the aforementioned European patent specification, the sealing issue - especially in the figures - is not particularly highlighted. The first of the two addressed seals is often a lip seal, which is located in the middle of the metering or spool, this lip seal in the tube or in a tube of the head piece rests. As the second seal is often a sealing cone at the top - that is facing away from the container - used end of the metering piston, which seals with a corresponding surface in the head.

There in this cone seal the applicant (at least internally) known Forms two inflexible cones into each other, lead small deviations from the ideal conical shape to leaks. In one of the applicant - at least internally - known Design exists in principle three execution-related Risks to such form deviations: The first risk exists in that the conical surface in the head piece at Injection is forcibly deformed, and therefore for deformation and / or burr formation inclines. The second risk is that the conical surface formed on the metering piston in the injection molding tool by two slides which creates a burr at the dividing line. In light Slider offset does not create a circular cross-section, but two mutually shifted semicircles with one step. The third The risk is that during assembly of the metering or spool piston with the head piece of the sealing cone through the undercut pressed in the head piece, causing the conical surface of the piston can be easily plastically deformed.

As can be seen from the above, it may be at the Applicant known design come to that the slide valve is not reliably seals. If at the filling The donor's too much air is partially donating not possible by normal operation of the dispenser; it is then compressed only air and relaxed again, but no Promoted cream or no pasty product.

Against this background, the invention is based on the object, a dispensing device with a dispensing or pumping piston and a head piece as well as a slide valve with good sealing properties.

According to the invention in particular a dispensing device according to claim 1 proposed. Preferred embodiments are the subject of the subclaims.

It Thus, in particular, a dispensing device for the Recording and dispensing of pasty products proposed, a container for receiving a pasty Product, as well as held on this container Dispenser head for dispensing the product. The dispenser head, Incidentally, also referred to as a pump head or dosing can be or is or may be such has a relatively displaceable relative to the container mounted head piece on, as well as one opposite this head and opposite this container each relatively displaceably mounted dispenser piston. The dispenser piston can also be referred to as a pump piston or as a metering piston or be such, or he is referred to as such. through the head piece and by means of the dispenser piston is a Slider valve formed. For this slide valve is a sealing device is provided or is a sealing device Component in the slide valve. The head piece is with a separate from this header and from the donor flask Component coupled. This separate component forms for the sealing cooperation with a first sealing surface of the dispensing piston and / or with a second sealing surface of the head piece a sealing portion or carries such a sealing portion. Such a sealing portion is at a particularly preferred embodiment from a first material, which in particular a soft or in relation to the material of the piston and / or the head piece is relatively soft material. It may be provided, for example, that the first material or the material from which the mentioned sealing portion of the separate component or held on the separate component sealing portion is a rubbery material or a thermoplastic elastomer.

In a particularly preferable embodiment is the separate Component produced by a two-component injection molding process Component or has such. This in the two-component injection molding process manufactured component forms in an advantageous embodiment the sealing portion for the sealing cooperation with the dispensing piston arranged on the first sealing surface and / or with a second sealing surface arranged on the head piece. The addressed sealing portion of the separate component can, for example, as Sealing lip be designed, especially as to the central Longitudinal axis of the dispenser piston surrounding, in particular closed circumferential, sealing lip.

The preferably produced by the two-component injection molding process Component has in an advantageous embodiment, at least a first section of a first material and at least a second portion from a second material. It is envisaged that the second Material is harder than the first material, the one of this preferably produced by two-component injection molding process Component formed sealing portion of second material is. The second material can - as already mentioned above - for example a rubbery material or a thermoplastic elastomer.

In Advantageous design, the container has a container bottom on, with the dispenser head to the container bottom arranged on the opposite side of the container and on this is held. The dispenser head can, for example, by means of a first latching device to be held on the container. It should be noted is that the container bottom facing away from or - related on the central longitudinal axis of the dispenser or the Dispenser piston - which faces away from the container bottom axial direction is also referred to as "top", while the container bottom facing direction or page can also be referred to as "bottom" or designated becomes.

In In a particularly advantageous embodiment, the first sealing surface the dispenser piston a conical sealing surface. For this conical sealing surface forms in particular on the arranged separate component or formed by this or from this supported sealing portion of a counter-sealing surface. The mentioned conical sealing surface is more advantageous Design - related to the circumferential direction of the central Longitudinal axis of dispenser piston - circumferential closed. It is thus in an advantageous embodiment conical or frustoconical. In a particularly advantageous embodiment the invention is provided that the addressed conical or conical or frustoconical sealing surface the dispenser piston is designed or arranged such that downwards or in the direction of the container bottom direction rejuvenated.

The separate component is preferably at its the container bottom opposite end open, or designed as a sleeve or ring. The separate component preferably has (also) a guiding function or is a guide sleeve or a guide ring. The separate component preferably extends in the - related on the radial direction of the dispenser piston - radial gap between the head piece and the dispenser piston.

in the Below is an embodiment of the present invention Invention are explained in more detail, wherein the invention as such, however, should not be limited. Much more fall under the invention various other embodiments and embodiments. It shows:

1 an exemplary dispenser device according to the invention in a schematic view; and

2 the dispensing device according to 1 in a second position.

The in the 1 and 2 shown dispenser 1 for receiving and dispensing pasty products, such as soaps and the like, has a container 10 for receiving a pasty product, as well as a dispenser head 12 for the issue of the product. The dispenser head 12 is about at least a first latching device 14 on the container 10 held. The container 10 has a container bottom 16 on. The spen derkopf 12 is at the bottom of the container 16 arranged away from the side of the container. The dispenser head 12 has a head piece 18 and a dispenser piston 20 on. The dispenser piston 20 is designed as a hollow piston and at its the container bottom 16 opposite end face 22 locked. Relative to the central longitudinal axis 24 of the dispenser piston 20 from the perspective of the front side 22 axially offset in the direction of the container bottom 16 points the dispenser piston 20 near the front 22 one or more radial openings 24 on, which allow the passage of pasty product. This is especially true that over the inner channel 26 of the dispenser piston 20 funded fluid product or pasty product on the one or more radial openings 24 in the open position of the slide valve 28 in the direction of the output channel 30 that in the head piece 18 is provided, can escape.

As 1 shows is in the closed position of the slide valve 28 the previously mentioned fluid connection between the inner channel 26 of the dispenser piston 20 and the output channel 30 through the slide valve 28 locked or interrupted.

Between the dispenser piston 20 and a top cover 32 of the container 10 or below the displaceably arranged dispenser piston 20 is a delivery chamber 34 in the dispenser head 12 intended. In the top cover 32 of the container 10 is a passage opening 36 provided, in which a valve 38 is arranged. This valve 38 is designed so that it opens automatically when the pressure in the delivery chamber 34 the pressure in the container interior 40 exceeds or exceeds by a predetermined amount and otherwise closes.

In the container interior 40 is also a Nachführkolben 42 intended.

As mentioned, the head piece 18 Incidentally, which can also serve as a control panel for a user to promote pasty medium from the dispenser, relatively displaceable relative to the container 10 , The dispenser piston 20 is both relatively displaceable relative to the container 10 as well as relatively displaceable with respect to the head piece 18 , There are provided in an advantageous design stop means which the relative movement of the head piece 18 opposite the dispenser piston 20 limit. This may in particular be such that upon actuation of the head piece 18 on pressure - in the container bottom 16 facing direction - this headpiece 18 , which can also serve as a control panel for a user, initially relative to the dispenser piston 20 in the direction of the bottom or in the direction of the container bottom 16 is moved without removing the dispenser piston 20 take. By this relative displacement opens the slide valve 28 , again 2 that shows this open position can be taken. The stop means are also particularly designed so that subsequently the head piece 18 the dispenser piston 20 with continued movement entrains and thus the dispenser piston pasty product from the delivery chamber 34 displaced, that over the piston interior 26 , the open slide valve 18 and the output channel 30 can be delivered or delivered.

Upon relief of the head piece or a corresponding control panel then the head piece under the action of the compression spring 44 that the head piece 18 opposite the container 10 supported, moved back in the direction of its initial position. During this return movement, the head moves 18 opposite the donor 20 first relative and then takes the dispenser piston 20 with, so that both the head piece 18 as well as the dispenser piston 20 is brought into their original position. About the relative movement between the dispenser piston 20 and the head piece 18 becomes the gate valve 28 closed again. The during the return movement of the dispenser piston 20 Induced suction caused by the valve 38 opens and thus pasty medium in the delivery chamber 34 is retraced.

When first sealing device was in the prior art - so it is known at least to the applicant - one of two Used cone formed sealing device, wherein the first cone or cone on the dispenser piston and the second cone or cone on the head piece is arranged.

With such sealing devices is all Recently, the problem mentioned above connected.

Against this background, in the design according to the 1 and 2 one from the head piece 18 as well as the dispenser piston 20 separate component 50 with the head piece 18 coupled, this separate component 50 for sealing cooperation with a first sealing surface 52 of the dispenser piston 20 and / or with a second sealing surface 54 of the head piece 18 a sealing section 56 forms or a sealing section 56 wearing.

This sealing section 56 forms a counter-sealing surface for the first sealing surface 52 or the second sealing surface 54 and here both the first 52 as well as the second sealing surface 54 ,

The first sealing surface 52 is designed here conical or conical or frustoconical and is of a radially outer surface of the sealing piston 20 educated. This first surface is here so that it is in the direction of the container bottom 16 rejuvenated.

The sealing section 56 is preferably at the radially upper end region of the component 50 arranged. The component 50 is about suitable locking means with the head piece 18 locked. The sealing section 56 can from one with the component 50 connected part or with an integrally formed on this part. For example, the component 50 with the sealing section 56 be produced in two-component injection molding process. It is particularly provided that the sealing portion 56 a sealing lip is or has a sealing lip. For example, this may be a rubber-like sealing lip, preferably a sealing lip of thermoplastic elastomer.

Furthermore, a second sealing device 60 intended. This second sealing device 60 is such that on the radial outside of the dispenser piston 20 a sealing lip or lip seal is arranged, which is positioned, for example, substantially in the center of the dispensing piston, and as counter-sealing surface, the radially inner surface of the component 56 serves. This second sealing device 60 is - based on the axial direction of the dispenser piston 20 - radially on the ground 16 facing side from the perspective of the first sealing device 46 arranged.

In the region of its lower end, the dispenser piston has a further sealing lip 62 for the formation of a third sealing device 64 on, with the sealing lip 62 on the inner surface of a sleeve-like extension 66 the top cover 32 sealingly rests. Further, a (cap) cap 68 intended. With 70 is a ring called, with 72 a soft-touch component for the operation.

The Embodiment is thus designed in particular as follows: In the head piece a separate component is snapped firmly. In this, for example, by two-component injection molding a attached rubber-like density (for example, thermoplastic elastomer). This soft seal serves as a mating sealing surface for sealing at the upper end of the metering piston. Any discontinuities on the sealing cone can be so elastically balanced and the sealing effect is significantly increased. Because this additional component open at the top, can all contours without forced removal be made in the tool. The sealing cone of the metering piston is while still being described by a retaining lip on the assembly However, this may be due to the geometric shape of this Flexible design of the component (removal from above possible) and does not damage the sealing cone.

The rubber-elastic sealing lips of the additional component dense on a surface of the sealing cone caused by forced removal can be removed from the mold axially. There is thus no - or at least a reduced risk of burring or slider misalignment. Slider that opens the openings in the upper part of the dosing form, do not extend to this sealing surface. It is so a production or assembly insensitive seal possible, which compensates for smaller form deviations elastically and thus promise a high sealing effect.

All Features disclosed in the application documents are considered to be essential to the invention as far as they are individually or in combination the prior art are new.

1

dispenser

10

container

12

dispenser head

14

first locking device

16

container bottom

18

headpiece

20

dispenser piston

22

front

24

longitudinal axis, radial openings

26

inner channel

28

spool valve

30

output channel

32

cover

34

delivery chamber

36

Through opening

38

Valve

40

container interior

42

tracking piston

44

compression spring

46

first sealing device

50

component

52

first sealing surface

54

second sealing surface

56

sealing portion

60

second sealing device

62

Sealing lip for 64

64

third sealing device

66

sleeve-like extension on 32

68

(Closure) cap

70

ring

72

Soft Touch component for the operation

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - EP 1399370 B1 [0004]

Claims (10)

Dispensing device for receiving and dispensing pasty products, with a container ( 10 ) for receiving a pasty product and one on this container ( 10 ) held donor head ( 12 ) for the dispensing of the product, whereby the dispenser head ( 12 ) is relatively displaceable relative to the container ( 10 ) mounted head piece ( 18 ) and one opposite this header ( 18 ) and against this container ( 10 ) each relatively displaceably mounted dispenser piston ( 20 ), wherein by means of the head piece ( 18 ) and the dispenser piston ( 20 ) a slide valve ( 28 ), for which a first sealing device ( 46 ), characterized in that the head piece ( 18 ) with one of this header ( 18 ) and this dispenser piston ( 20 ) separate component ( 50 ), this separate component ( 50 ) for sealing cooperation with a first sealing surface ( 52 ) of the dispenser piston ( 20 ) and / or with a second sealing surface ( 54 ) of the header ( 18 ) a sealing section ( 56 ) or a sealing section ( 56 ) wearing. Dispensing device according to claim 1, characterized in that the sealing portion ( 56 ) is made of a first material. Dispensing device according to one of claims 1 and 2, characterized in that the separate component ( 50 ) a component produced by the two-component injection molding method ( 50 ), which the sealing portion ( 56 ) for sealing engagement with the dispenser piston ( 20 ) arranged first sealing surface ( 52 ) and / or one on the head piece ( 18 ) arranged second sealing surface ( 54 ) trains. Dispensing device according to claim 3, characterized in that the component produced in the two-component injection molding method ( 50 ) at least a first section ( 56 ) of a first material and at least a second portion of a second material, wherein the second material is harder than the first material and wherein the component produced by the two-component injection molding method ( 50 ) formed sealing portion of first material. Dispensing device according to one of the claims 2 to 4, characterized in that the first material is a rubbery Material or a thermoplastic elastomer is. Dispensing device according to one of the preceding claims, characterized in that the container ( 10 ) a container bottom ( 16 ) and the dispenser head ( 12 ) at the container bottom ( 16 ) facing away from the container ( 10 ) is arranged and held on this. Dispensing device according to one of the preceding claims, characterized in that the separate component ( 50 ) on the dispenser head ( 12 ) is held by a second latching device. Dispensing device according to one of the preceding claims, characterized in that the first sealing surface ( 52 ) of the dispenser piston ( 20 ) is a conical or conical or frusto-conical sealing surface. Dispensing device according to claim 8, characterized in that the conical, on the dispenser piston ( 20 ) surface ( 52 ) concentrically closed about the central longitudinal axis of the dispensing piston ( 20 ). Dispensing device according to one of claims 8 and 9, characterized in that designed as a conical sealing surface first sealing surface ( 52 ) in the ground ( 16 ) facing the direction.