DE8716466U1 - Liquid dispensing device - Google Patents

Description

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Dispensing device for liquids The invention relates to a dispensing device for liquids, the storage container of which has a flexible grip zone, by the deformation of which a closure element can be axially displaced.

Small quantities of liquids, especially pharmaceuticals and cosmetics, are taken from a storage container using a swab tip, brush or wick. On the one hand, it is advisable to feed the liquid into the dispensing element in a way that is as easy and controllable as possible, and on the other hand, a quick interruption of the dosing flow and a drip-free seal of the storage container must be guaranteed.

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To fulfill this task, a design is known in which a closure element is connected to a flexible disk, which is deformed into a saddle shape over a flexible container wall, whereby the valve element axially attached to the center of the disk is raised.

The disadvantage here is that if the valve element is stuck or stuck, the disc can still be deformed, but this deformation is no longer effective at the center of the disc, which is connected to the valve element. This results in unreliable operation.

The invention is based on the task of ensuring that a forced force transmission causes a reliable opening of the locking element and that a compression spring takes over the closing process.

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This is achieved according to the invention in that a closure element, resting on its sealing surface, is connected to an inclined surface by means of a compression spring, which rests on contact surfaces of the lever arms, which can be tilted about a clamping point.

In further development it is expedient* to increase the radial path of the contact surfaces in comparison to the operating path on the grip zone, which is achieved by having the lever arms rest on the contact point of the actuated grip zone and by maintaining a distance a from the contact surface.

Furthermore, it is expedient that the inclined surface is designed as a cone.

In order to obtain a degressive opening characteristic of the locking element in comparison to the operating width.

it is expedient that the inclined surface is designed as a spherical cap.

In order to be able to equip the dispensing device with various application elements, it is expedient that a holder for an application element can be molded onto the mouthpiece.

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The advantages that can be achieved with the invention are in particular that with simple means*, i.e. with a few, easily attachable parts that are easy and quick to assemble, a dispensing device for liquids is created, which can be operated by finger pressure with only a small amount of force and because of the

small number of parts and the robust simplicity of the parts and the direct power transmission, extremely functional - works more efficiently. -

From the drawing it is clear that the opening of the locking element is also possible when the '"force attack" i.e. the support of the operating finger

in a wide longitudinal area of the grip zone. _k : . The lever arms are always grasped and deflected radially.

^; 15/ A different position of the contact points results, due to the system, in a different geometry of the force transmission to the inclined surface. ' ^ ₁

If the force is applied more towards the tip, a lever dimension a is created as shown in Fig. 1, whereby the pivoting path at the contact surface is greater than at the point of contact. This means that the lock can be opened quickly with short operating paths. Conversely, if the point of contact between the grip zone j and the lever arm is at the height of the contact surface, the ratio to the contact surface is approximately 1:1, whereby

In this case, higher forces are available to open the shutter.

An embodiment of the invention is shown in the drawing and is described below.

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Show it:

Fig.j a longitudinal section through the dispensing device in rest position

Fig.2 a longitudinal section through the dispensing device when actuated

Fig. 3 a cross section 111-11Γ through the lever arms

,Fig. 4 a longitudinal view of the mouthpiece with {lever arms

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in a storage container 1 there is a storage chamber 2 which contains d)/e liquid not shown in detail»
On the storage container 1 there is a flexible, preferably thin-walled grip zone 3 which merges into a reinforcement 4 at the mouthpiece 1. The rear base 5 of the storage container ₁ contains a centering 6 on which the compression spring 7 is centered. The compression spring 7 rests on the collar 8 and centers itself on the pin 9 which is firmly connected to the collar 8. The inclined surface 10, which is designed as a cone in the drawing, is formed onto the collar 8. The latter continues in a shaft 11, at the end of which the closure element 13 is located. This rests against the sealing surface 14 under the action of the compression spring 7. The mouthpiece 12 is firmly connected to the reinforcement 4 of the storage container 1. Centering ribs 15 are fitted inside the mouthpiece 12 to guide and center the shaft lengthwise. Lever arms 16 are formed on the mouthpiece 12 with a uniform circumferential pitch. These springs pivot around the clamping point 18. Bending deformation along the lever arms 16 is largely avoided by the cross-sectional profile.

The lever arms 16 are separated from each other by slots 17 up to the clamping point 18.

In the rest position of the dispensing device Fig.1, the outer diameter of the radially arranged lever arms 16 corresponds approximately to the inner diameter of the grip zone 3, fingered by the assembly play.

The lever arms 16 have a contact surface 19 at their end which rests on the inclined surface 10. In the actuated position Fig. 2, a contact point 20 is created ^between the lever arm 16 and the grip zone 3, which point is at a distance a from the contact surface 19.

The liquid dispensing device, due to its design, is simple and reliable in its operation.

Before operation, the dispensing device is held vertically with the mouthpiece 12 pointing downwards. |

The supply liquid reaches the area of the centering ribs 15 by gravity and fills the remaining longitudinal spaces up to the sealing surface 14. The closure element 13 rests against the sealing surface 14 by means of the compression spring 7.

If the grip zone 3 is now mechanically deformed by finger pressure, the lever arms 16 are pivoted radially around their clamping point 18. The resulting contact point 20 directs the actuating force to the lever arms 16. This creates a radial path on the contact surface 19 that is greater than the operating path in the contact point 20, and this is greater the larger the dimension a is. Depending on the position of the operating fingers = the contact point 20 can be in a different longitudinal position to the grip zone 3.

The radial pivoting path of the lever arm 16 on the contact surface 19 leads to a return of the inclined surface 10 against the action of the compression spring 7, whereby the closure element 13 lifts off its sealing surface 14. When the grip zone 3 is relieved at the contact point 20, the closure element 13 is brought to a stop against the sealing surface 14. This is caused by the compression spring 7, which moves the lever arms 16 back via the inclined surface 10 until the closure element 13 strikes the sealing surface 14.

When the grip zone 3 is relieved, the negative pressure that develops in the reservoir 2 suddenly interrupts the flow of liquid. At the same time _, this negative pressure causes air to be sucked in by the I]

Valve gap until closure is achieved.

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Claims (5)

• ·f *&zgr;· · claims 1. Dispensing device for liquids, consisting of a storage container with a flexible grip zone, in which a closure element can be opened by deforming the Grip zone is axially displaceable, characterized in that a closure element (13) rests against the sealing surface (14) by the compression spring (7) and is connected to an inclined surface (10) which is Contact surfaces (19) of the lever arms (16), which can be inclined about a clamping point (18). 2. Dispensing device according to claim 1, characterized, that the lever arms (16) rest on the contact point (20) of the actuated grip zone (3) and that there is a distance (a) to the contact surface (19). 3. Dispensing device according to claim 1, characterized, that the inclined surface (10) is designed as a cone. 4. Dispensing device according to claim 1, · characterized, that the inclined surface is designed as a spherical cap. 5. Dispensing device according to claim 1, characterized in that a holder for an application element can be formed onto the mouthpiece (12). ,11111 . Ill Il (I I &igr;&igr; i I I If I I I ii _ I I I I I .