Note: Descriptions are shown in the official language in which they were submitted.
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The present invention relates to a magazine for
plug-in electrical assemblies which are connected to
one another in the magazine by a rear wall wiring
which comprises a printed circuit board snd contact
pins which are connected by jumper wires.
It is known from German Patent Specification
No. 27 43 428 as open to inspection, to attach a
cable plug to the exposed ends of the contact pins
for externally connecting the magazineO A centering
, . . .
10 body for each particular plug is arranged between
the exposed ends of the contact pins and the wiring
space for the jumper wires. This centering body is
placed over the contact pins and fixes the free ends
thereof in the correct position. It is held at a
15 distance from the circuit board by means of spacing
members. Ths centering body is attached by the spacing
members to frame elements of the maga~ine which also
carry the rear wall plug strips for the insertable
C . assemblies. This means that each centering body is
2U assigned to a respective rear wall plug.
A magazine for electrical assemblies generally
comprises at least-one printed circuit board which
serves for the supply of a potential. This circuit
board extends over and forms the whole of the rear wall.
25 In order for it to be possible to arrange a centering
body at any desired position, the circuit board must
possess a corresponding number of holes, in order
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that the centering bodies may be screwed to the magazine
frame. Since several rows of plugs can be arranged
one above another in a magazine~ these holes throuyh
which the securing screws are passed, are arranged
not only in the edge zones but also in the centre
of the circuit board. The large number of holes
required limits the freedom of design of the circuit
board with respect to the arrangement of the conductor
- paths.
It is an object of the present invention to provide
a magazine in which the attachment of the centering
bodies is simplified and the number of through-holes
required in the rear wall board for the passage of
the securing screws is reduced.
According to the invention there is provided a
magazine for plug-in electrical assemblies which are
connected to one another by rear wall wiring which
comprises a printed circuit board forming the rear
`-~ wall of the magazine and contact pins connected by
jumper wires ? onto the exposed ends of which pins at
the rear face of the circuit board, one or more
cable plugs can be attached for external connection
purposes, wherein one or more centering bodies
assigned to said plug or respective ones of said plugs
is or are arranged between the exposed ends of the
contact pins and the wiring space of the-jumper wires,
the or each said centering body being positioned
over the contact pin ends so as to hold the latter in
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the correct positinn and being attached to the magazine
so as to be spaced from the rear face of the circuit
board by means of one or more support strips attached
to the magazine, the or each said support strip being
provided with a series of holes into which the
centering body or bodies is or are screwed.
The perforated strips require far fewer support
points on the rear wall than would be needed if the
centering bodies were directly attached thereto. The
support strips are provided with support holes which
may be arranged close to oné another in rows, the
number of such holes considerably exceeding that of
the suppor`t points. This means that the rear wall
circuit board requires a considerably smaller number
of openings for the attachmant of a support strip.
The support strips, which are attached so as to be
spaced from the circuit board, are provided with closely
adjacent holes, the spacing of which may correspond,
for example, to one grid division of the rear wall
contact pins. In this way, it is possible to arrange
the centering body so as to be laterally offset
relative to the rear wall plugs for the assemblies.
Installation of the centering bodies is also simplified
since fewer spacing sleeves are needed and the centering
bodies can be directly screwed to the support strips.
It is possible to use the same screws simultaneously
to attach the support strip and the circuit board.
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Consequently, no additional bores nePd to be provided
in the circuit board for the attachment of the support
strips.
It is further possible for a plurality of centering
bodies, arranged one above another, to be attached by
their adjacent ends to a common support strip. This
reduces the number of support strips required and
likewise the corresponding number of bores required in
~- the circuit boardO
The invention will now be further described with
reference to the drawing, which is a schematic
perspective view of one embodiment of the invention,
The drawing shows a magazine for plug-in electrical
assemblies 1 immediately prior to final assembly. The
assemblies 1 can be connected by way of rear wall
plugs 2 by rear wall wiring, the pins of the rear wall
plugs being connected by jumper wires. This rear
wall wiring comprises a printed circuit board 3 which
- extends over and forms the whole of the rear wall of
the magazine. Contact pins 4 of the rear wall plugs 2
project from the rear side of the printed circuit
board 3. These contact pins can likewise be connected
to one another by means of jumper wires. However,
their length is such that cable plugs (not shown) can
be attached to their exposed ends for the external
connection of the assemblies. A centering body 5 can
be positioned onto the exposed ends of the contact pins 4,
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its function being to fix precisely the ends of the
contact pins and mechanically secure the cable plug
which is to be attached thereto. This centerlng body 5
can be secured to support strips 7 by means of screws 6.
These support strips 7 extend over the entire length
of the rear wall of the magazine and can be attached
thereto so as to be spaced from the circuit board 3,
by means of further screws 8, which pass through
securing holes 9 in the support strips 7 and through
corresponding free bores l~ in the circuit board 3
and can be screwed to horizontal carriers ll of
the magazine. Between the circuit board 3 and the
support strips 7 spacer sleeves are arranged which
ensure the spacing required for the wiring of the
rear wall. The securing screws B thus serve
simultaneously for attaching the circuit board 3 and
the support strips 7.
The support strips 7 are each provided with a
double row of closely adjacent support holes 12. By
means of these holes, it is possible to attach ths
centering bodies 5 variably and/or closely adjacent
to the support strips 7. The securing screws S are
preferably provided with self-tapping threads so that,
- particularly when the number of centering bodies is
small, relatively few support holes 12 need be provided
with a thread.
