DE3149559A1 - Arrestable case for magnetic tape cassettes - Google Patents

Abstract

The invention relates to an arrestable case for storing magnetic tape compact cassettes, composed of two parts, to be precise of a lid in pocket form and having, if appropriate, shortened transverse walls, and of a lower part, which comprises the remaining bottom and the other side walls, as well as of a hinge joint, composed of pin and hole on the transverse walls of the lid and on the outer side walls of the lower part corresponding with the latter and, for receiving the cassette in a way more secure in terms of vibration, of two inwardly protruding extensions, the distance from the swivel point to the front edge of the bottom of the lower part being equal to the distance of the swivel point to the rear lid wall and the swivel point being displaced slightly downwards from the centre, in relation to the height of the cassette, and the bottom of the lid striking against the limitation of the bottom of the lower part when the said lid is swung open through 180 DEG .

Description

Lockable case for magnetic tape cassettes

The invention relates to a lockable case for storing Magnetic tape compact cassettes, consisting of 2 parts, namely a pocket-shaped one Lid with possibly shortened transverse walls and a lower part that covers the rest of the base and comprises the remaining side walls and a hinge joint consisting of Pin and hole on the transverse walls of the lid or on the corresponding with the latter outer side walls of the lower part and for the vibration-proof reception of the cassette from two inwardly protruding approaches.

When opening the case, the pocket-shaped lid in which the cassette is inserted, swiveled beyond 1800. With this handling can the cassette will fall out. To avoid this, it is already known that the staggered To provide transverse walls with a curved groove in which the otherwise usual Knob of the joint slides on the corresponding outer side walls and on Snaps into a hole. This enables the case lid to be swiveled approx. 900, although a panning around 1800 would be desirable. In DE-AS 23 66 195 is this achieved by an inwardly extending in the outer side walls of the lower part Groove is present, which is arranged at the same distance from the pivot pin as the pin from the free end of the side wall. On the shortened transverse walls of the lid appropriately trained ribs sit. The latter prevent falling of the lid. The outer side walls have a due to their low rigidity certain spring action, so that when the lid is swung open from the wedge-shaped Ribs, which offer relatively little resistance, are pushed apart and the cover is twisted by the weight of the cassette over 1800, so that the Cassette can be omitted despite the preventive measures. The ribs should also Take over the function of locking the lid in the lower part when the case is closed. This is achieved only inadequately because the snap-in device is too close to the The pivot point of the hinge joint lies.

Due to the relatively large lever arm between the fulcrum that is created as a result and the lid can open automatically at different positions.

The object of the invention is, without using additional Molded parts on the case provide an effective locking mechanism for the lid when pivoted around 1800 obtain.

According to the invention, this object is both described at the outset Case solved in that the distance from the pivot point (11) to the front edge (6) of the bottom of the lower part (1) is the same as the distance between the pivot point and the rear Cover wall (4) and the pivot point, based on the height of the cassette, slightly is shifted from the center downwards (15), and when opening around 1800 the lid strikes against the boundary of the bottom of the lower part.

Further more useful designs of the case can be found in the Subclaims and in the description.

The inventive design of the case is achieved that by the fact that the rear cover wall rests against the bottom edge of the lower part overturning the lid beyond 1800 - even with somewhat rougher handling of the case - is not possible. This locking is achieved without additional Molded parts opposite em Stan ## rdetui.

On the basis of drawings that show the design of the case the invention explained in more detail, namely Figure 1 shows a perspective view of the Cases with open lid and with a straight border of the bottom part.

Figures 2 and 3 each a side view with sloping and rounded Edges of the bottom part and the rear cover wall.

FIG. 4 shows a side view of the case with one opened around 1800 Lid and Figure 5 is a perspective view of the case with the lid locked and stop bar.

The plastic case is used worldwide for storage used by magnetic tape compact cassettes. It exists in accordance with the state of the art from two parts, namely from the lower part (1), pocket-shaped cover (2) with transverse walls (3), a rear wall (4) and an inner wall (5), which when the housing is closed the boundary of the bottom (7) of the lower part fits together. The boundary surfaces of the bottom part and the inner wall of the cover are in general trapezoidal formed (see DE-AS 1300 864, Fig. 2, with the housing open in 180 position and there is a greater distance between the parts mentioned. The lower part has next to the bottom (7) side walls (8, 9, 10). Located at the ends of the side walls (9, 10) a pin (11) and a hole with a longitudinal groove in the opposite transverse walls (12) to form a joint for pivoting the case parts. On the inside of the lower part bottom are also two approaches (14, 13) for vibration-free recording of the cassettes provided. In order to be able to lock the lid in the 180 ° position, ndch the Frfint ng elor ceiling31 is inserted in the lower part in such a way that the The distance between the pin (11) and the front edge of the bottom of the lower part is equal to the distance between the pivot point or the pin and the rear cover wall (4). On both sides is the pivot point, based on the height of the cassette, slightly off the center shifted downward, which can be seen in Fig. 1 (15).

This arrangement means that the upper edge of the inner wall of the lid is located slightly below the top edge of the side wall (9).

In the known case design (see Figures 4 and 6 of DE-AS 1300 864) the back wall of the case cover comes at 900 position above the bottom of the Lower part and a further rotation beyond 90 arises like mentions a larger distance between the lid pocket and the front edge of the lower part. This allows the cover to be swiveled beyond 1800 so that the cassette is out the bag can be omitted. By shifting the pivot point for the case cover on the other hand, the lid hits the boundary surface when it is opened in the 1800 position (6) of the bottom of the lower part, as shown in Figs. 1 and 4. To a stop of the lid at approx. 900 when opening, the front edge (6) of the bottom and the outer edges (16, 17) of the rear wall of the lid beveled to one another (Fig. 2) or rounded (Fig. 3). The demarcation or stop area the bottom of the lower part (Fig. 1) runs in a straight line. In another embodiment of the invention (Fig. 5), it can be designed as a web (18). To do this, the Inner wall (5) of the lid and the bottom (7) of the lower part, for example, to one another designed trapezoidal and go in the vicinity of the side walls (9, 10) in a web (18) which forms the stop at the 1800 position of the lid. at In both versions of the case, the lid is held in the 1800 position, see above that ztch can be easily removed from the cuaaette.

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Claims (5)

Claims: Consisting of 2 articulated parts Case for holding a magnetic tape cassette, in particular a compact cassette, its a part in the form of a pocket-like cover that holds the cassette contains, and its other part as an open, lrol nslel, uninclosed lower part is formed, wherein the inner wall of the lid has a limitation that into the Limitation of the bottom of the lower part fits. and the lid and base in collapsed Form a closed housing and the joint from each one pin on the state Inside of the opposite side walls of the lower part and one hole each the side walls of the lid, with pegs and holes in the walls being mutually exclusive can be interchanged, there is, characterized in that the distance from the pivot point (11) to the front edge (6) of the bottom of the lower part (1) is equal to the distance of the pivot point to the rear cover wall (4) and the pivot point, based on the The height of the cassette is shifted slightly down from the center (15) and when opening the lid by 1-80 ° its bottom at the boundary of the bottom of the Lower part strikes. 2. Case according to claim 1, characterized in that the outer edge <16, 17) of the back wall of the lid and the free edge of the base (6) of the lower part are beveled inwards. 3. Case according to claim 1 and 3, characterized in that the outer edges the rear cover wall rounded and that of the lower part accordingly are concave. 4. Case according to claim 1-3, characterized in that the free End of the bottom of the lower part and the inner wall of the lid runs in a straight line. 5. Case according to claim 1 and 4, characterized in that the free The end of the bottom of the lower part and the inner wall of the lid are trapezoidal is. so that they fit into each other when folded, with the free end of the Bottom of the lower part at the transitions to the side walls as a stop bar (18) is trained.