DE6942242U - PLASTIC CASE. - Google Patents

Description

PATENT ADVOCATE DR.-ING. KLAUS DURM KARLSRUHE FELIX-MOTTL-STRASSE 1 a TELEFON 590455

L 1212/69

October 21, 1969

SchwarzwSlder case factory Fritz Reader KG., Lahr / Black Forest

763 Lahr Hansastrasse 1

Course material case

The innovation is a plastic case for Jewelery, consisting of a bowl-shaped base part and a spring cover articulated using pivot pins locked into joint sockets.

As gift packaging and for storing jewelry such as Rings and brooches, as well as watches, lighters and other small objects, there is a great need for spring lid cases, which have recently been machine-made in considerable numbers.

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October 21, 1969 parts list

1 Bodsnteil 2 Spring cover 3 Bottom part rear wall 4th Recess 5 Acetabular cups 6th Back wall 7th Tab 8th gap 9 Swivel axis IO Torsion spring 11th Spring legs 12th Spring legs 13th Retaining leg 14th Retaining leg a angle 15th bag 16 bag

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Such cases are designed in two parts; they consist of a housing and a cover that inject through are made of a thermoformable plastic. Both parts carry molded elements that come together Form joint and are designed in such a way that for fastening the cover to the housing 1ener only in a certain Position needs to be attached so that the joint parts snap into one another.

In the manufacture of cases, the endeavor is in particular for simple and inexpensive manufacture. Here prepared the desire for a lid that pops open by itself when a closure is operated, some difficulties, because the spring elements required for this and their holding devices on the cover and bottom part as well as the assembly require a not inconsiderable effort. Attempts to reduce the amount for the spring cover mechanism The necessary effort was therefore not lacking.

It has long been known to equip cases, the lid of which is hinged to the housing by means of a hinge joint, with a helically wound torsion spring pushed over the hinge pin, the bent ends of which bear against the housing and the cover. When the lid is closed

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the torsion spring under tension, which causes the lid to jump up when it is released. This construction but is not cheap because it requires the use of a hinge joint provided with a hinge pin.

Kit German Utility Model 1996612 a bursting open of the lid causing device has become known, which make use of a substantially U-shaped, two oppositely facing spring legs supporting spring. The spring is clamped here by means of retaining lugs on a one-piece hinge strip made entirely of plastic, which is anchored in the two case parts. This solution cannot easily be transferred to cases whose lid is hinged to the base part in a different way.

The object of the innovation is to propose a spring cover mechanism for plastic cases with a bowl-shaped bottom part and a spring cover articulated using pivot pins that are locked into joint sockets, the production costs of which are low and the effort required for assembly is low.

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This object is achieved by a rod-shaped torsion spring lying parallel to the pivot axis of the spring lid in a gap between the base part and the spring lid, the two ends of which go into spring legs bent at right angles, which sit in pockets which extend from the adjacent narrow sides of the rear wall of the spring lid and the bottom rear wall go out. The proposal thus consists of an easily manufactured, approximately Z-shaped bent spring, for example made of steel wire, for the attachment of which pockets are provided in the rear walls of the housing and cover, which allow easy assembly by inserting the spring legs. The advantage of the innovation is that a mass-produced item is cheaper.

In a preferred embodiment of the innovation, the spring legs have oppositely directed retaining legs, and the length of at least one of the pockets corresponds to that one of the retaining legs. This allows the torsion spring to be clamped in the pocket before the case parts are assembled which makes assembly easier.

Another essential feature of the innovation is the torsion spring, the spring legs and one of the retaining legs in a common plane, and the other holding leg is at an acute angle to this plane.

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This enables the second retaining leg to be inserted quickly and smoothly into the pocket of the case part to be attached during assembly.

An embodiment of the innovation is shown in the drawing and is described in more detail below.

Show it:

Figure 1 shows the rear view of a plastic case with the innovation;

FIG. 2 shows a partial cross-section through the same plastic case, cut along the line II - II in FIG Figure 1;

Figure 3 shows a torsion spring according to the innovation, in perspective Depiction.

A case for jewelry according to innovation 1 is pending a bowl-shaped bottom part 1 of mostly rectangular Floor plan as well as a hinged jump deck 2; these two parts are injection molded respectively made in one piece from a thermoplastic material.

A 9 9

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The spring cover 2 is connected in an articulated manner to the base part 1. For this purpose, the bottom part 1 points to the bottom part rear wall 3 has a recess 4, on the end faces of which joint sockets 5 are arranged. To form a swivel joint the spring cover 2 has a tab 7 on its rear wall 6, at the ends of which pivot pins protrude, which rotate in the joint sockets 5 when the spring cover 2 is swiveled up. Between the tab 7 and the top the recess 4 is a gap 8. Parallel to the pivot axis 9 of the spring lid 2 lies within the Gap 8 is a rod-shaped torsion spring 10 of circular cross-section, both ends of which are bent at right angles Spring legs 11 and 12 pass over, to which holding legs 13 and 14, which are directed against one another, are connected. the Torsion spring 10, the spring legs 11 and 12 and the retaining leg 13 lie in a common plane while the holding leg 14 is bent out of this plane in such a way that it is at an acute angle a to this plane stands, see Figure 3.

The two spring legs 11 and 12 are in pockets 15 and 16 j in the rear wall 6 of the spring cover 2 and in the bottom part rear wall 3 are arranged and which of the go out opposite narrow sides of these parts. The opening of the pocket 15 is located in the spring cover 2

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on the tab 7 and that of the bottom part rear wall 3 seated bag 16 is located in the top of the recess 4. The length of the bag 16 is chosen so that they just übereinstlnat with the length of the retaining arm 13 and, therefore, during the insertion of this holding leg 13 in the pocket 16 a press fit is achieved.

To assemble the plastic case according to the invention, the torsion spring 10 is first pressed with its spring leg 11 into the pocket 16 in the bottom part rear wall 6 until it lies lengthways on the upper side of the recess 4, while the holding leg bent out of the plane is at the angle a against the plane of the bottom part rear wall. Then the spring cover 2 is swiveled up, placed on the bottom part 1 and closed after swiveling further; in the process, the torsion spring 10 is tensioned, as FIG. 3 indicates. The spring lid 2 is held in the closed position by a lock arranged on its front wall; When it is actuated, it jumps into the open position under the tension of the torsion spring 10.

0942242

Claims (3)

L 1212/69 October 21, 1969 claims for protection 1. Plastic cases for jewelry, consisting of a bowl-shaped bottom part and one using in Joint sockets latched pivot pin hinged spring cover, characterized by a spring cover parallel to the pivot axis (9) of the spring cover (2) in one Gap (8) between the bottom part (1) and spring cover (2), rod-shaped torsion spring (10), both ends of which in right-angled bent spring legs (11 and 12), which sit in pockets (15 and 16), which of the Adjacent narrow sides of the rear wall (6) of the spring cover (2) and the bottom part rear wall (3) go out. 2. Plastic case according to claim 1, characterized in that the spring legs (11 and 12) have mutually directed retaining legs (13 and 14), and the length of at least one of the pockets (15 or 16) corresponds to that of one of the retaining legs (13 or 14). - 3. Plastic case according to claim 2, characterized in that the torsion spring (10), the Spring legs (11 and 12) and one of the retaining legs (13) > 0 1 * L 1212/69 lie in a common plane and the other holding leg (14) is at an acute angle (a) to this plane.