CONNECTION DEVICE FOR COAXIAL CABLES

CONNECTEUR POUR CABLES COAXIAUX

English Abstract

ABSTRACT OF THE DISCLOSURE
A connection device is provided for connecting a
coaxial cable to a component on a circuit board. The circuit
board is of a type provided with rows of connection pins along
one face. The pins coact with connection blocks having
female contacts along one side and connection pins associated
therewith along the other side. A screening sleeve of a co-
axial cable may be thrust between four pins on the connection
block. A pin, centrally situated in relation to these four
pins, is soldered to the central conductor of the coaxial
cable. The screening sleeve is provided with longitudinal
slits which are approximately as wide as the thickness of
the pins but shorter than the pins, so that when the sleeve is
thrust between the pins the latter come into engagement with
the edges of the slits and retain the sleeve.

Claims

THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLU-
SIVE PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A connection device for connecting coaxial cable
to a component mounted on a circuit board, comprising a
first block provided on one face thereof with rows of connec-
tion pins, a second block provided on one face thereof with
rows of connection pins and on another face thereof with rows
of female contacts adapted to engage the rows of connection
pins on the first block, the connection pins of the second
block being arranged in groups of a predetermined number, a
central terminal within each group of pins for connection to
the central conductor of the coaxial cable, and a screening
sleeve for the coaxial cable provided with longitudinal slits
shorter than and approximately the same width as the connection pins of
the second block, the screening sleeve being dimensioned rela-
tive to the groups of connection pins such that it can be
thrust between the connection pins of each group with the
connection pins thereof becoming engaged within said slits
to retain the screening sleeve in position.
2. A connection device as claimed in claim 1,
wherein said predetermined number is four.
3. A connection device as claimed in claim 1,
wherein the connection pins of each group surround a circle,
the diameter of which is somewhat less than the outer diameter
of the screening sleeve, so that when the sleeve is thrust in,
the connection pins move in the slits until the end portions
thereof come against end walls of the slits, whereupon they
are deflected outwardly.
4. A connection device as claimed in claim 1, 2
or 3, wherein the screening sleeve is welded or soldered to
the connection pins.

Description

632~
The invention relates -to a connection device for
connecting a coaxial cable to a component arranged on a cir-
cuit board, of the type having one edge provided with rows of
connecting pins which coact with connection blocks containing
female contacts on one side and connection pins associated
with these on the other side.
Relatively expensive arrangements are necessary for
connecting a coaxial cable to a component on a circuit board
of the type mentioned, since such a cable cannot be connect- .
ed simply to the connection pins on the edge of the board; it
is necessary to replace the pins with coaxial connection
sleeves in which the pin of the coaxial connector can be in-
serted.
An object of the invention is to enable a coaxial
cable to be connected to a component mounted on a circuit
board, while using the customary connection pins.
Accordingly, the present invention provides a con-
nection device for connecting coaxial cable to a component
mounted on a circuit board, comprising a first block pro-
20 vided on one face thereof with rows of connection pins, asecond block provided on one face thereof with rows of con-
nection pins and on another face thereof with rows of female
;: contacts adapted to engage the rows of connection pins on
the first block, the connection pins of the second block be-
ing arranged in groups of a predetermined number, a central
: terminal within each group of pins for connection to the
central conductor of the coaxial cable, and a screening
sleeve for the coaxial cable provided with longitudinal slits
shorter than and approximately the same width as the connec-
tion pins of the second hlock, the screening sleeve being
dimensioned relative to the groups of connection pins such
that it can be thrust between the connection pins of each
-- 1 -- ~

group with the connection pins thereof becoming engaged wlthin
said slits to retain the screening sleeve in position.
The invention will now be described in more detail,
by way of example only, with reference to the accompanying
drawings, in which:-
Figure 1 schematically illustrates in perspectivea connection device in accordance with the invention;
Figure 2 is a side view of the connection device;
and
Figure 3 is a plan view of the connection device.
Figure 1 illustrates connection device in perspec-
tive. A coaxial cable 1 is to be connected to a component
3 mounted on a circuit board 2. Along its edge portion the
board 2 is provided with contact blocks 4, of which one is
shown raised in relation to the circuit board for the sake of
clarity. The block 4 is provided along one side with rows of
bent pins 15, which are soldered to the circuit board and,
via printed conductors 31, 32, 33, for example, are connected
to the different components. Along its other side the block
4 is provided with straig~t pins 14, which are fixed in rows
of holes in the same way as the pins 15 for engagement with
a connection block 5 having female contacts 6. In the exten~
sion of the female contacts the connection block 5 is provid-
ed with connection pins 7, forming rows in the same way as
` the other pins 14 in block 4.
The coaxial cable 1, which is to be connected to
the connection block 5, has a cylindrical screening sleeve 8
connected to its outer conductor and having an outer diameter
such that it can be inserted between four pins 7a-7d on the
3~ block 5. The sleeve 8 is provided with ~our slits 12 which
are shorter than the pins 7. Durin~ assembly the central
conductor 1 is first soldered to the central pin 9, subsequent
-- 2 --

l~6~3~a
to which the sleeve 8 is thrust between the pins 7a-7d such
that these engage in the slits. Since the pins are pointed,
they are pressed outwards as the sleeve is pressed in, and
the sleeve is thus kept in a fixed position by engagement be-
tween the pins and the edges of the slits. This arrangement
thus provides a removable coaxial connection from the cable
1 to the component 3.
Figures 2 and 3 show, in front and plan view respec-
tively, the coaxial connection before and after the sleeve
has been thrust between the pins. The inner contour of the
pins lies along a circle having a somewhat smaller diameter
than that of the sleeve. When the slee~e is pressed in the
pins 7 glide in the slits 12 until they come into contact
with the end wall of the slits. Since the ends of the pins
are bevelled, the pins glide obliquely outwards along the
outer wall of the sleeve, as can be seen from the right-hand
side of Figure 2. As a result of the elastlc retention it is
also possible to solder the pins to the wall of the sleeve 8,
as indicated by 16 in Figure 2.
It will be seen that the invention provides a much
simpler connection device than the previously used devices,
particularly existing standard connection devices having
screening sleeves provided with longitudinal slits
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