DE8805029U1 - Device for the mechanical and electrical connection of electronic components with a frame-shaped subrack and its rear panel wiring - Google Patents

Description

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Siemens AG

Device for the mechanical and electrical connection of electronic components with a frame-shaped subrack and its rear panel wiring

The invention relates to a device for the mechanical and electrical connection of electronic components in cuboid-shaped housings with a frame-shaped module carrier and its rear wall wiring by means of a detachable joint and screw connection and multi-pin connectors.

In automation technology, electronic modules are grouped together in rows in module racks, with the modules being connected to each other and to supply and discharge lines via the rear panel wiring. The modules themselves are provided with multi-pin connectors on their rear face, which can be connected to the module rack via corresponding mating connectors.

Two systems of subracks are currently used: the subrack in the form of a three-dimensional frame, into which the modules are inserted into guide rails and, after the plug connection has been made, are mechanically secured by a straight-line movement in the direction of insertion using means acting on the front. However, the construction effort and space requirement is relatively high for subracks in the form of a frame.

In the other system, the subrack is constructed more simply as an essentially two-dimensional frame, with means for hanging and fastening the subracks. The housings of the subracks are provided with hook-shaped extensions on the upper edge of their rear face, which are hooked into projections on the subrack and thus form a joint. With a pivoting movement around the joint axis,

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the plug connections between the module and the module carrier are engaged and the module is secured in the module carrier using screws or locking bolts that can preferably be operated from the front.

However, difficulties arise when using multi-pin connectors, since the maximum permissible plug-in angle cannot often be maintained when the module is swiveled in, which can lead to damage to the plug contacts and to incorrect contacts.

fi 10 The plug-in angle is defined as the angle that the center axes of the plug-in elements to be joined may form in order to ensure perfect plugging ^. It is, for example, + 4* according to DIN 41612.

] 15 The task therefore arises of improving the last-mentioned system ' in such a way that the mating conditions can be complied with even in the case of assemblies of large dimensions.

A solution to the problem is seen in a device of the type mentioned at the outset, which has the features of claim 1.

The device according to the invention is thus a combination of the two systems, in which a simple module carrier in frame form with a detachable joint connection to the module is used, but the plug connections are established after the end of the pivoting movement by a straight-line movement.

To explain the invention, an embodiment with the movement sequence up to the establishment of the mechanical and electrical connection between the module and the module carrier is shown in Figures 1 to 4 and described below.

Figure 1 shows a longitudinal section through a subrack 1, which essentially consists of a two-dimensional frame» &idigr;&eegr; the subrack 1 has the rear wall wiring in the form of printed circuit boards 2, which are mounted on their front

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side carry the spring bars 3 for four-pin connectors. The module carrier 1 is provided with projections 4 at the top and bottom, the end sections 5j 5 ¹ of which are directed upwards and downwards respectively.
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The assembly 6 in a cassette-like housing is provided on the upper edge of its rear end face with hook-shaped extensions 7, which can be hooked behind the end section 5 of the upper projection 4 of the assembly carrier 1 and thus form a detachable articulated connection.

All the blade strips ³¹ of the multi-pin plug connectors are arranged on the rear face of the assembly 6 and are to be brought into engagement with the spring strips 3 of the rear wall wiring. The assembly 6 is pivoted further from the position shown in Figure 1, with a tongue-shaped extension 8 on the lower edge sliding onto the end section ⁵¹ of the lower projection 4 in the assembly carrier 1. On the inside of the extension 8 there is a recess 9 into which the end section ⁵¹ noticeably snaps, thus signaling that the end position of the pivoting movement has been reached. The center axes of the plug elements of the plug connectors are then aligned parallel to the plug direction a - ^a1 , the plug angle is practically 0*.
The dimensions of the extensions 5 and 8 and the projections 4 are such that in this end position the plug-in elements are not yet engaged.

To create the plug connection, the connectors 3, 3 ¹ are now joined together by a straight line movement. The path bet is about 5 to 6 mm. It corresponds to the distance b in Fig. 2=

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For string guidance, as can also be seen from Figure 2, the upper edges of the extensions 4 can be designed in the manner of a rack, the teeth 10 of which are arranged in correspondingly

formed recesses 11 between the hook-shaped projections 7 |

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Figure 3 shows the assembly 6 after the plug connection has been made between the female connectors 3 on the assembly carrier 1 and the male connectors 3' of the assembly 6*. The mechanical fastening is carried out by means of screw bolts 12 which can be operated from the front of the assembly 6 and which are inserted into slotted nuts 13 in the
End sections 5, 5 ¹ of the extensions 4 are screwed in.

Figure 4 shows the position of assembly 6 and assembly carrier 1 in a view from above, corresponding to Figure 2*
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2 Protection claims
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Claims (2)

5 ; · i \4tt.' ' i :: t &iacgr; I J < · ■ · ·· t · 88 R H 2 O &bull; · t · Protection claims 1. Device for the mechanical and electrical connection of electronic components in cuboid-shaped housings with a frame-shaped module carrier and its back-wiring by means of a detachable joint and screw connection and multi-pin connectors, characterized by a) hook-shaped projections (7) on the upper edge of the rear in cJ.!&mdash;..il. -l_&mdash; n_..__..___ t jr\ xv/ £>bxi.)iocj:bc; uca uauyiuppc vo/, b) projections (4, 5) on the assembly carrier (1) onto which the hook-shaped extensions (7) can be hooked and thus form the detachable joint connection, c) tongue-shaped projections (8) on the lower edge of the rear face of the assembly (6) which extend perpendicularly to the latter, d) projections (4, 5 ¹ ) on the module carrier (1) onto which the tongue-shaped extensions (8) slide and are guided when pivoting in, wherein the dimensions of extensions (7, 8) and projections (4) are selected such that, upon completion of the pivoting movement about the articulated connection, the plug elements of the connectors (3, 3') are aligned approximately coaxially to the plugging direction a - a ¹ , but are not yet joined together and that contact is made by a straight-line movement of the assembly (6) in the plugging direction towards the assembly carrier (1). 2. Device according to claim 1, characterized in that the end sections (5 ¹ ) of the lower projections (5·) and the extensions (8) have formations (9) which act as a detent and indicate that the end position of the pivoting movement has been reached. 03 Oil