DE6932008U - RELEASABLE LID CLOSURE - Google Patents

Description

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27/69 'PLI Scht / Li

August 12, 1969

ROBERT BOSCH ELEKTRONIK UND PHOTOKINO GMBH Berlin and Stuttgart

Detachable lid lock

The invention relates to a detachable cover lock for a metal housing of an electrical or electronic device with a resilient closure element which presses the cover against the end edges of the side walls of the housing.

Electrical and electronic components or assemblies are often in metal housings that can be closed by a cover

housed. So that the components or assemblies for the purpose for adjustment or repair are easily accessible, the cover lock must be detachable. Serve for this For example, screws or "clamps" fastened to the cover itself, which completely encompass the housing and the

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® Cover against the front edges of the side walls of the housing

to press. There are also shielding in high frequency technology

known housing with chambers formed by partitions, which closes a removable cover on the one in the direction on the cover bent Pederblechteil presses, which with its side webs over projections on the side walls of the housing engages. The bent Pederboard part should not only place the lid on the front edges of the side walls,

but also on the front edges of the partition walls with sufficient

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August 12, 1969

Press sufficient pressure so that perfect contact occurs between these parts.

The known detachable cover closures for metal housings, however, have the disadvantage that they are for a rational Production and application are still too complicated and also expensive.

The invention is based on the object of developing a lid closure which has the lowest possible technical and requires economic effort and which is also suitable, a metallic housing with partitions without to close additional means so that the cover also rests tightly against the front edges of the partition walls.

According to the invention, this object is achieved with a detachable lid closure for a metal housing of an electrical or electronic device with a resilient, the cover against the Front edges of the side walls of the housing pressing closure element solved in that on the front edges of at least, three side walls of the housing at least one, each protruding outward through a Durohbruch of the placed cover Projection is attached with a contact surface perpendicular to the cover and the projections are arranged in such a way that that their contact surfaces alternately pointing in opposite directions lie on an approximately zigzag line, and that the closure element is a spring wire, which under arc or wave-shaped deformation on the outside of the

Cover

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August 12, 1969

Lid can be clamped between the contact surfaces of the projections.

To attach the cover to a housing, essentially only a piece of commercially available spring wire is required, this either by hand or by means of an auxiliary tool is clamped between the contact surfaces of the projections.

If the detachable cover lock is to be used in a housing which is divided into chambers by partition walls, then according to According to a preferred embodiment of the invention, at least one projection is provided on each of the front edges of the partition walls.

In an embodiment of the invention; It is advantageous if the projections are in the form of hooks, the angled ends of which point alternately in opposite directions and the insides of which serve as contact surfaces. This measure of the spring wire can not in a direction perpendicular to the ^cover: loosen what would otherwise möglicn in a strong shock exposed housing may.

Good contact between the cover on the one hand and the front edges of the side walls and, if necessary, the partition walls of the housing, on the other hand, is achieved if, according to a further feature of the invention, the insides of the angled ends of the

, hook-shaped projections are at an acute angle to the

Open the cover outwards, so that the closure element supported on the inside of the hook-shaped projections exerts a pressure exerts on the lid. In this embodiment, the

Lid lock

32008

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August 12, 1969

Lid closure with particular advantage in high-frequency voting devices or use transistor amplifiers for television reception antennas.

Further details of the invention are explained using an exemplary embodiment shown in the drawing. In of the drawing mean:

Fig. 1 is a perspective view of a metal housing with protrusions attached to three side walls,

Fig. 2 is a perspective view of the metal housing according to Fig. 1 with a lid attached by a spring wire,

Fig. 3 is a perspective view of a metal housing chambers formed by partitions and

4 shows a perspective view of the metal housing in the state closed by a cover.

A cuboid metal housing 1 for electrical or electronic Device has according to Fig. 1 on the front edges of 'three side walls 2, 3 and 4 each one on an imaginary, zigzag line lying peg-shaped projection 5, 6 and 7. Each projection is provided with a contact surface 8, 9 and 10, which, as described below, alternate point in opposite directions. A flat metallic cover 11 (FIG. 2) bit is used to close the housing 1 lateral openings 12 for the protrusion © 5 to pass through

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PLI Scht / Ll August 12, 1969

to 7 of the housing. To close the housing one of a, z. B. in the relaxed state straight, existing spring wire Closure element 12 deformed in such a way that it is when placed Lid with its central part surrounds the contact surface 10 of the projection 7 in an arc shape and that it with its free Ends under tension on the mutually facing contact surfaces 8, 9 of the projections 5, 6. This becomes the Cover 11 held with sufficient force in its position closing the metal housing. Need to loosen the lid only the free ends of the closure element 13 somewhat to be bent towards each other, whereby it can be easily removed from the housing. Then the cover can also be removed. The The closure element can be put on and removed either by hand or by means of a tool.

If the metal housing to be closed by a cover is, for example, a housing 14 (FIGS. 3 and 4) for a transistor amplifier for television antenna voltages, divided by three partition walls 15 * l6 and 17 into four, electrical components receiving, chambers l8 to 21 is divided, it is expediently only at the front edges of the partition walls one projection 22, 23 and 24 that is integral therewith intended. In this case, the projections are preferably in the form of a hook, the angled ends of which are 25 to 27 alternately point in opposite directions. These projections also lie on an approximately zigzag line.

the

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12, 8th 1909

The insides of the angled ends 25 to 27 are provided with inclined contact surfaces 28 to 30, namely the angled ends open near the outside at an acute angle to a cover 21 (Fig. 4), the three openings 32, 33 and 34 for passage which includes projections 22-24.

Sin in the relaxed state z. B. straight spring wire serves as a Closure element 35 · To close the housing 14, the closure element 35 is opened after a Bending its free ends towards one another with its central area under the contact surface 29 and with the free ends placed under the contact surfaces 28 and 30. During the subsequent Letting go or springing up of the closure element occurs as a result of the inclined contact surfaces each have a force component acting in the direction of the cover surface, which acts on the cover the housing presses.t. Since the force components are mainly effective in the area of the partition walls 15 to 17, the Lid pressed particularly tightly onto the front edges of these walls. This achieves a good one that is desired in such housings Contact between the partitions and the cover.

The bottom 36 and two side walls 37, 38 of the housing 14 are in the longitudinal direction of the chambers 18 to 21 via a third side wall 39 extended to an additional chamber 4o for Recording of external connection contacts 4l, 42 to form. The connection contacts contain opposite the metallic floor isolated soldering lugs 43, 44, to which in the drawing the over-

visibility

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August 12, 1969

visibility due to connecting lines not shown are connected, the z. B. through openings 45 in the side wall 59 lead into chambers I9, 20. The additional chamber 4ö is closed by the cover 31, which is somewhat elongated for this purpose and provided with an angled portion 46.

For the radiation-tight closure of the housing, it is recommended that between housing 14 and cover Jl z. B. an elastic Interlayer with metallic surface to be inserted, the eventual. Unevenness of the lid and the front edges represent the side and Compensates for partition walls.

The invention can also be used with the same benefit in housings with more than three partition walls, the projections also lie on a zigzag line and the spring wire is then placed in a wave shape around the projections.

Likewise, the invention can be applied to housings one or more projections on the side walls and one or more further projections on the partition walls of the Geaäuses are arranged. After all, it should be a bigger case Dimensions are closed by a cover, so two or more projections can also per side or partition wall and two or more closure elements are provided which then press the cover evenly onto the housing.

Claims (5)

I 111 * Il 1) 11 Il ι III I I I I I. . I »III ■ 11 t Ml I I I I ... I 111. Il 27/69 - 8 - PLI Scht / Li August 12, 1969 Claims for protection 1. Detachable cover closure for a metal housing of an electrical or electronic device with a resilient closure element pressing the cover against the end edges of the side walls of the housing, characterized in that on the end edges of at least three side walls (2, 3, 4) of the housing (1 ) at least one protrusion (5 * 6, 7) protruding outward through an opening (12) in each of the cover (11), each with a contact surface (8, 9 * 10) perpendicular to the cover (11), is attached and the projections (5s 6, 7) are arranged in such a way that their contact surfaces (9, 9 » 10) alternately pointing in opposite directions lie on an approximately zigzag line, and that the closure element (IJ) is a spring wire. or wave-shaped deformation on the outside of the cover (11) between the contact surfaces \ o _s 9 »10) outer projections (5 * 6, 7) can be braced. 2. Lid closure according to claim 1, characterized in that that with a housing (14) divided into chambers by at least one partition (z. B. 15) at least one Projection (for example 22) is provided on the front edge of the intermediate wall (for example 15). 27/69 - 9 - PLI Scht / Ll August 12, 1969 3 · Lid closure according to claim 1 or 2, characterized in that that the projections (22, 23, 24) have the shape of hooks, the angled ends (25, 26, 27) of which point alternately in opposite directions and the insides of which serve as contact surfaces (28, 29, 30). 4. Lid closure according to one of claims 1 to 3 * thereby characterized in that the insides of the angled ends (25, 26, 27) of the hook-shaped projections (22, 23, 24) are at an acute angle to the lid open outwards so that that can be seen. the insides of the hook-shaped projections ^ 22, 23, 24) supporting closure element (35) exerts pressure on the cover (31). 5. Lid closure according to claim 1 or one of the following, characterized in that the projections (5, 6, 7) are integral with the side walls (2 _Ä 3, 4) or intermediate walls (15 * 16, 17) of the housing (1 , 14) are.