DE7529087U - Child-resistant lock for container - Google Patents

Description

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Patent attorneys Dipl * -Ing. W. Beyer Dipl.-Wirtsoh, -Ing. B, Jochem

6 Prankfurt am Main Staui'enstrasse 36

Note:

Adolf Hofmann

Metal and plastic goods factory GabH 6983 Kreuzwertheim
Kreuzstrasse 11

Child-resistant closure for containers

The innovation relates to a child-resistant lock with an axial movement against spring force and rotary movement releasable bayonet locking of a cap on a container made of elastic material.

Child-resistant container closures with a spring-loaded Bayonet locks are known. The DT-Gm 7J 02 346 describes such a closure, wherein between a disk covering the container opening and the top wall of the cap are clamped as a spring element disc springs. This multi-part fastener is proportionate expensive.

There are also various other constructions of child-resistant closures of the type described above are known, which do not need any additional parts to function

than the container and the cap itself. In all Tho 8694 G / 12.9.1975

7523087 01/08/76

in these cases the spring force is generated by resilient inner flanges and collars on the cap, whereby the flanges or collars form a seal at the same time (cf. DT-AS 1 270 484, DT-AS 1 907 482, DT-OS 1 804 549). Apart from the fact that sealing lips should normally be soft, elastic, while the desired The known locks have suspension for locking the bayonet lock requiring greater rigidity furthermore the disadvantage that no more suitable and cheaper rigid material can be used for the cap can. In addition, the inner shape of a cap requires .-> relatively complicated and expensive molding tools with elastic flanges or collars.

The innovation is based on the task of creating a container closure of the type mentioned, which in the simplest Is designed in a way that is functionally appropriate and is particularly easy to manufacture

The above object is achieved according to the innovation in that the area of the container neck covered by the cap is designed as an axially effective spring, preferably by forming one or more circumferential beads during the forming process. The new Closure has the advantage that the beads in the container neck practically do not complicate the manufacture of the container, on the other hand, however, the cap can be designed in any way and made from any suitable inexpensive material can. When the container is formed, the beading results in a thinner material thickness, which is useful for the desired spring function.

In a further preferred embodiment of the innovation, the bayonet lock consists of several on the container neck the circumference distributed, radially outwardly projecting cams and matching grooves on the inside of the cap, wherein the grooves expediently in a helical manner

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one of the non-rotatable locking in the closed position serving paragraph are formed. This feature offers the advantage that when screwing the cap onto the container, the axial compression of the container neck, ie the tensioning of the spring is facilitated.

In a preferred embodiment, the cams on the container have a surface normal to its central longitudinal axis. Such Cams can be molded on in a simple manner and are advantageous with regard to the attachment and removal of the cap.

The innovation is explained in more detail below using an exemplary embodiment shown in the drawing.

The drawing shows a container 10, on the stepped tapered neck 12 of which there is a bayonet lock held and secured cap 14 is put on. In the illustrated embodiment, there is one more on the container opening Snap-on diffuser 16 provided, but this is not necessary for the innovation · As a special feature it should be noted, however, that the diffuser 16 is on a central pin prior to assembly on the container is kept small on the inside of the top surface of the cap 14. When putting the cap on the container for the first time then snap the edges of the lens 16 and the container into each other, and from then on the lens remains on the container and disengages from the central pin 18 when the cap 14 is removed.

In order to make the container neck sufficiently elastic and to obtain a sufficiently large spring deflection, in the example a circumferential bead 20 is provided. Such beads on containers with child-proof lock are known per se, So far, however, they have only had the purpose of preventing deformations of the container from spreading to its closure parts, but rather to end at the bead to ensure the safety function of the closure even if the container is deformed- *

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perform (see DT-GM 74 19 070). With the innovation, however the bead serves as a spring that is used for locking. .

The bayonet lock between the container 10 and the In the example, cap 14 consists of two or more screw-thread-shaped Grooves 22 on the inside of the Eappensantels. At the end, the helical grooves 22 have a step-shaped shoulder 24 that is related to the pitch of the screw represents a return. The grooves 22 cooperate with external projections or cams 26 on the container neck 12. As the dashed illustration of a cam 26 shows, its upper and lower surfaces are located 28 or 30 normal to the central longitudinal axis 32 of the container and the cap. This shape makes it easier to put on and take off the cap and, in particular, to remove it of the container during manufacture, when, as has been found to be advantageous, four cams are attached.

If the container neck is not above the bead 20, as in the illustrated embodiment, over a diffuser 16 or the like is supported on the cap 14, the container neck rests directly on the cap. As well as in the exemplary embodiment there is the possibility of forming a seal between the container opening and the cap. The bead 20 prevents deformations of the container 10 from affecting this seal.

It goes without saying that shapes differing from those shown can be selected for the parts shown, without deviating from the basic idea of the innovation.

Protection claims

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Claims (5)

Protection test 1. Child-resistant lock with a releasable by axial movement against spring force and rotary movement Bayonet locking of a cap on a container made of elastic material, characterized in that the cap (14) covered area of the container (12) as axially effective spring is formed 2. Closure according to claim 1, characterized in t that the container neck (12) is formed with one or more circumferential beads (20). " 3. Lock according to claim 1 or 2, characterized in that the bayonet lock (22, 24, 26) of several on the container neck (12) over the Circumferentially distributed, radially outwardly projecting cams (26) and matching grooves (22, 24) on the inside of the Cap (14) consists. 4. Lock according to claim 3, characterized in that the grooves (22) in a manner known per se helically with one of the non-rotatable Locking of the cap in the closed position serving shoulder (24) are formed. 5. Closure according to one of claims 1 to 4, characterized characterized in that the cams (26) have a surface (28, 30) normal to the central longitudinal axis (32) of the container (10). Tho 8694 / 12.9.1975 7529087 01/08/76