DE2651694A1 - CONNECTION DEVICE FOR A COAXIAL CABLE - Google Patents

Description

Di. l ":.;: ·., · W s, = wf
Dr. Hans-Α. Browns

B HüßchSD 80, Pienzentuentr. 28

November 12, 1976 EL-6026

EGG. DU PONT DE NEMORS AND COMPANY lOth and Market Streets, Wilmington, Del. 19898, V.St.A.

Connection device for a coaxial cable

The invention relates to a connection device for connecting a coaxial cable to a printed one Circuit having circuit board, which has a housing made of insulating material, and a first and a second Connection device made of conductive metal, of which the rear Ends as shrink contact for the conductive shield of the coaxial cable and the conductor core of the same are formed, while the front ends are connections for the Form circuit board that is parallel in the assembled state are arranged.

Such an arrangement is known from DT-OS 2 406 417.

When connecting a coaxial cable with two adjacent connection points on a printed circuit board, the Difficulty, because of the transition between the concentric conductors and the conductors lying next to each other, that a lap-

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Dance disturbance occurs, which is responsible for incorrect impedance matching responsible for. According to the DT-OS mentioned above, it is therefore proposed that the concentric position be as follows as long as possible. Therefore, both connection devices are designed as connection pins, one of which The end represents a shrink contact. To assemble the two Terminal pins on a cable first become part of the jacket insulation of the cable removed in the usual way and then part of the jacket shield and finally a Part of the core insulation. Both shrink contacts are one behind the other and arranged as close as possible to the respective stripped shield and core. Afterward the shrink contacts arranged in this way are pushed into a sleeve made of soft plastic material, both connecting pins extending through holes provided for this purpose in the sleeve and then at a right angle to the direction of the cable be bent. This way you get two pin contacts that are plugged into the holes of a circuit board can be.

However, the known connection device has some disadvantages; for example, certain impedance impairments in a stable cannot be avoided where the core cannot is more surrounded by the jacket shield, while on the other hand the mounting options of such a connection device strictly on the insertion of one in this way assembled cable are confined in two holes of a circuit board, with the cable itself on the circuit board or almost comes to rest on the circuit board.

The present invention is based on the object of providing a connection device of the type mentioned at the beginning to ask, which does not have the disadvantages mentioned and their possible uses in comparison to the arrangement of the DT-OS 2 406 417 listed above has been significantly expanded are -

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The connection device according to the present invention is characterized in that in the assembled state the shrink contact of the second connection device outside the extension of the S cn ruaipf contacts of the first connection device is, and the first connection device substantially surrounds the second connection device and forms an extension of the cable jacket. According to the invention is the concentric arrangement has been abandoned, which of the arrangement of the DT-OS listed above and others older proposals are based. The eccentric position of the two shrink contacts to one another requires that the bent end portion of the cable core, which protrudes beyond the cable shield, is relatively long, im In contrast to the arrangement of the DT-OS mentioned above, however, this disadvantage is completely eliminated since this uncovered core section shielded together with the entire first connection device by the second connection device x-iird »This means that there is not just an impedance disturbance Avoided at that section of the cable, but at the same time ensures a shielding against interfering signals.

Obxirohl the connection device according to the present invention as well as those of the DT-OS 2 406 4-17 without contact pins can be carried out, form according to the preferred embodiment the connections connection sockets into which pins of the circuit board can be inserted. This has the advantage that stack combinations are possible, for example the insertion of two connection devices on top of each other on common circuit board pins.

An embodiment of the connection device according to the invention can be manufactured in such a way that the first connection device two opposite parallel shielding plates has, the rear ends of which are connected by a transverse web, egg itself over the plates in addition Shrink contact with the cable shield extends, wherein the front ends of the shielding plates facing each other

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Contact edges on v / iron, which run at right angles to the shielding plates parallel to the crossbar and the contact edge of one plate is at a greater distance from the queisteg than the contact edge of the other plate, the contact edges form contact halves for a connection socket and also the housing from one Block-shaped holder made of hard plastic material, which is formed by a front wall, a rear wall, a 'lower part wall and two parallel side walls ^, the two shielding plates of the first connection device lying along the outside of the parallel side walls and the housing has a receiving channel on the front which runs from the top to the bottom, delimited by the front wall, by a partition wall running parallel to the front wall and by two side walls, and that for receiving both contact edges of the first connection recess in each of the side walls at the level of the receiving channel in the neighborhood ft and is determined parallel to the front wall or the partition wall, with two slots serving to receive and centering the two contact edges and the 'housing on the rear side has a receiving opening through the partition, the rear wall, the side walls and partially through the lower wall and which serves to accommodate the second connection device together with the unshielded end section of a cable core connected to it, while the front wall of the receiving opening is limited by the partition which forms a receiving channel for the socket of the second connection device, which extends from the top to the bottom extends.

The two contact edges, which are arranged opposite one another inside the housing in the receiving channel on the front side are, form in a favorable manner the connection socket for the ground or shielding conductor, the position in the receiving channel is determined by the slots which are arranged one behind the other on the two side walls. The contact edges can also provided with opposing indentations

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be making the contact and pinching one in between Ensure inserted circuit board pin.

With a view to a good locking of both shielding plates the first connection device on the side walls of the housing, this can be provided with locking lips that snap into corresponding holes in the shielding plates. In this simple way, the correct position of the shielding plates set. Preferably, the side walls of the housing also have lower edges which the shield plates hold on their underside in the locked state.

For an inexpensive assembly of the connection device with In the case of a cable it is of course desirable that the cable is also clamped in its entirety, i. H. in the area of external insulation. This can be done in an effective manner with the device according to the invention by the Shrink contact of the first connection device with a I should receive connected to clamping the connected cable is.

With regard to the appropriate assembly of the second connection device it is also proposed according to the invention that the contact socket in the second connection device and the shrink contact by a resilient connecting element are connected to each other, which during assembly in the housing approximately over a range of 180 ° is bent. Such an embodiment of the second connection device has the advantage that the arrangement is considerably simplified since the second connection device together with the other end shrunk thereon can be easily deformed while furthermore bending over 180 ° a very small space requirement for the second connection device requires, so that the dimensions of the connection device can be kept small.

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Finally, the second connection device can be effectively locked are cold, indeai in the receiving channel for the contact socket of the second connection device Locking cam is provided over which the socket snaps when it is inserted from the top.

The invention will then be explained in conjunction with the drawing using a preferred exemplary embodiment. Show it: .

Fig. 1 is a perspective view of an inventive Contact device with partially broken away parts, which is connected by a coaxial cable, and

Pig. 2 is a perspective view of a printed circuit board, an.jwhich two connection devices according to Fig. 1 one above the other are arranged.

The connection device according to lig. 1 contains a housing 1, a first connection device 2 and a second connection device 3 »each with the shield and the core a coaxial cable are connected.

The first connection device also contains a holder 4- for the cable insulation, a shrink contact 5> for the cable shield and two parallel shield plates 6a and 6b, which are connected to a transverse web 7 on their rear side. The front ends of the shield plates are in bent at a right angle to contact edges 8 and 9, which run parallel to the other and is spaced apart and which are also provided with two opposing indentations 10. In the assembled State, these contact edges form a first contact socket for a circuit board pin, the indentations ensuring that the pin is clamped.

The connection device 3 contains a shrink-fit contact 11

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for a cable core, which has an elastic connecting element is connected to a second contact socket 13.

The housing 1 made of hard plastic material is through two parallel side walls 14a and 14b, a front wall 15, a Rear wall 16 and partially bounded by a lower wall 17. The housing has a partition wall 18 at the front, which runs parallel to the front wall 15 and separates a channel 19 from the rest of the housing, which is open at both ends is. The channel 19 forms a receiving channel for the two contact edges 8, 9 of the shielding plates 6a and 6b. In the both side walls 14 are also two pairs of opposite sides Slits 20 and 21 are provided, which are parallel to the channel and each adjacent to the forehand and to the Partition wall and serve to accommodate and center the two contact edges 8 and 9. At the bottom are Holding surfaces 22 are provided in the receiving channel 19.

To assemble the first contact device with the housing, both shielding plates 6a and 6b are displaced along the side walls of the housing, the contact edges sliding into the slots 20 and 21 until the undersides of the contact came; en the holding surfaces 22 on the bottom of the receiving channel 19 touch. In order to obtain good locking of the first connection device, the side walls of the housing have protruding locking lips 23 which engage in corresponding locking openings 24 of the shielding plates of the first connection device. The two side walls have protruding lower edges 23 at their lower ends, which serve as holding surfaces against which the undersides of the shielding plates 6a and 6b come to rest can slide against the housing.

On the front of the housing is a receiving opening 26, for receiving the second connection device together with

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serves that part of the cable core that is not shielded by the cable will. The receiving opening has a receiving channel 27 on the front side, which is delimited by the partition 18 and serves to accommodate the second socket 13. To ensure their position, there is a on the top in the receiving channel Locking cam 28 is provided, via which the locking cam of the second socket can be snapped into place.

For assembly, the coaxial cable is stripped in the usual way, so that one after the other the shielding insulation. 29, the shield 30, the insulated core 31 and the bare core 32 appear. In contrast to assembly of a coaxial cable with a known device, however, the bare part of the cable core is relatively long, so that it can be bent over.

The first connection device is then connected to the Cable connected, with the cable insulation holder 4 clamped around the cable insulation and the shrink contact 5 on the bare shield is shrunk on. The shrink contact 11 of the second connection device becomes in a similar manner shrunk onto the bare end of the cable core and then both connection devices are in the housing arranged, wherein the second connection device is bent over the elastic connecting element in such a way that it can be pushed into the housing into the opening provided for this purpose, with the second contact socket is arranged in the receiving channel 27 provided for this purpose. The first connection device is from above moved on the housing, both shielding plates are arranged along .der side walls and the contact edges via the receiving slots 20 and 21 into the receiving channel 19 reach. During this installation of the first and second connection device the locking is also carried out, so that the cable can then be connected to a circuit board can.

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Fig. 2 shows, for example, how this is done. In Fig. 2, a circuit board 33 is shown on the circuit pins 34a, 34b and 34c are attached. These circuit pins have a standardized distance from one another, as is usual with such circuit boards. Fig. 2 shows how then two connection devices according to the invention are pushed onto each other on three circuit pins can. The middle circuit pin 34b forms a ground contact, while the two outer circuit pins 34-a and 34c represent two different signal contacts. In this way a good and space-saving connection is established, whereby a common reference point is guaranteed for both shields of the respective cables.

It is obvious that the invention does not apply to the example Embodiments shown according to FIGS. 1 and 2 is limited and modifications within the scope of the claims possible are.

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Claims (11)

EL-6026 Patent claims Connection device for connecting a coaxial cable with a circuit board, with a housing made of insulating material and a first and second, made of conductive Existing metal connection device, the rear ends of which are used as shrink contacts for the conductive Shielding of the coaxial cable and formed for the conductive cable core, and their front ends Form connections for a printed circuit board with a printed circuit, the connections being made after Assembly run parallel, characterized in that in the assembled state the shrink contact (11) the second connection device (3) outside the extension of the shrink contact (5) of the first connection device (2) and that the first connection device (2) the second connection device (3) surrounds and represents an extension of the cable shield, ι 2. Connection device according to claim 1, characterized in that that the connection devices form sockets (13) which are open at both ends and through which. PCB pins can be used. 3 · Connection device according to claim 2, characterized in that that the first connection device (2) has two opposing parallel shield plates (6a, 6b), the rear ends of which by a transverse web. (7) which extends over the plates in a shrink contact for the cable shield is extended, the front ends of the shielding plates (6a, 6b) have mutually bent contact edges which are at right angles to the shielding plates and parallel to the transverse web (7), the contact edge of the one shielding plate being at a greater distance from the transverse web (7) on v / eist than the contact edge of the other - 10 - 7 0 9821/0302 shielding plate, and the contact edges form the halves of a contact socket (13), the housing (1) from a blockföriaigen holder made of hard. There is plastic material and a rear wall (16), two parallel side walls (14-a, 14-b) and partially a lower wall (17) are delimited by a front wall (15) _{5, along the outside of the side walls the two shielding plates (6a} , 6b) of the first contact device (2), the housing also has a receiving channel (19) on the front side, which extends from top to bottom and through the "front wall (15)" through a partition wall (18) parallel to the front wall and bounded by the two side walls (14a, 14-b), the receiving channel (19) for receiving the two contact edges (8, 9) of the first contact device (2) in each of the side walls at the level of the receiving channel in the vicinity and parallel serves for the front edge or partition wall, two slots (20, 21) being provided for receiving and centering the two contact edges (8, 9) and the housing on the rear side having a receiving opening (26) for receiving the second connection device (3) serves together with the unshielded end section of the connected cable core, the receiving opening (26) through the partition (18), the rear wall (16), the side winds (14-a, 14-b) and partly the lower wall (17) is limited, and the front part of the receiving opening is limited by the partition (18) which forms a receiving channel (27) for the socket of the second connection device, which extends from top to bottom. 4. Connection device according to claim 3> characterized in that the two contact edges (8, 9) of the first connection device (2) are opposite one another Have indentations (10) to clamp a circuit board pin between them. 11 - 709821/0302 EL-6026 lbs 5. Connection device according to claim 3 or 4, characterized in that that the side walls of the housing with locking lips (23), which are fitted into corresponding openings in the shielding plates of the can snap into the first connection device. 6. Connection device according to claim 5> characterized in that the side walls of the housing have lower edges which the shield plates on their underside keep locked. 7 · Connection device according to claim 3 »4-, 5 or 6, characterized characterized in that the shrink contact (5) of the first connection device (2) with an insulation holder connected to the plague clamp of the connected cable. 8. Connection device according to one of claims 3 to 7 » characterized in that the second connection device (3) i the socket (13) and the shrink contact (11) are connected to one another by an elastic connecting element, which during assembly in the Housing is bent approximately 180. 9- connection device according to claim 8, characterized in that that in the receiving channel (26) for the socket (13) of the second connection device (3) a locking cam (28) is arranged, via which the socket (13) can snap into place when inserted from above. - 12 - 709871/0302