JPS5811020Y2 - Electrical connector for coaxial ribbon cable - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electrical connector for connecting coaxial ribbon cables.

As the propagation speed of integrated circuits in computer circuit systems increases, coaxial cables are often used to transmit signals between circuit boards and equipment assemblies to minimize external noise and crosstalk. It is being used more and more often.

Traditionally, to connect these coaxial cables to a circuit board, the center conductor and ground conductor of the coaxial cable were individually soldered to terminals fixed to the circuit board, which was a time-consuming and expensive process. Otherwise, expensive coaxial connectors would have to be used.

Furthermore, recently, coaxial ribbon cables for use in interconnecting circuit systems have also appeared in response to the trend towards higher density due to an increase in the number of signals in circuit systems.

This coaxial ribbon cable is a ribbon-shaped cable in which multiple coaxial cables that share an outer jacket are arranged in parallel, or multiple single coaxial cables are glued together in parallel, and each coaxial cable has a high-speed pulse It has a center conductor that transmits a signal, an outer conductor that shields the center conductor from external interference, and a dielectric that separates the center conductor and the outer conductor.

The outer conductor may be a braided metal wire, a cross-wound metal wire, or a metal foil wrapped around the dielectric.

There are electrical connectors for connecting such coaxial ribbon cables, but conventional electrical connectors have poor packaging density and require special coaxial ribbon cables, making them difficult to connect small coaxial ribbon cables. Not suitable,
Furthermore, the number of ground terminals is the same as the number of signals, which is uneconomical.

Another drawback was that the high-speed transmission characteristics at the connector section were poor.

Furthermore, due to the frequency used and noise margin,
It is necessary to select various ground patterns, but with the structure of conventional electrical connectors, it is difficult to obtain an arbitrary ground pattern by simple modification.

In view of these points, the purpose of the present invention is to provide an electrical connector for coaxial ribbon cables that eliminates these drawbacks, allows for high-density mounting, and allows for easy adoption of any desired ground pattern. be.

Next, the present invention will be described with reference to embodiments of the present invention based on the accompanying drawings.

FIG. 1 shows a perspective view of an electrical connector for a coaxial ribbon cable as an embodiment of the present invention in a connected state.

This electrical connector consists of a housing 10 in which a signal contact and a ground contact are arranged, a guide block 20 in which the end of a coaxial ribbon cable 40 to be connected is wound and arranged, and the guide block 20 is combined with the housing 10. It consists of a cable clamp 30 for fixing the position of the end of the coaxial ribbon cable.

The housing 10 is made of an insulating material such as plastic, and has a signal contact introduction opening 11 at the front end for receiving each signal contact on the other side.
Ground contact introduction openings 12A are arranged in two rows for receiving the ground contact A and the counterpart ground contact.

In this example, aperture 11B is unused and empty.

These openings will be explained in more detail later.

FIG. 2 shows, in a perspective view, an example of one signal contact disposed in the signal contact hole of the housing 10. As shown in FIG.

This signal contact 50 has a springy conductive sheet I.
It may be integrally formed from a material, and has at one end an insulation displacement groove 52 for insulation displacement connection to one of the center conductors of the coaxial ribbon cable.
a pressure welding connection part 51 having a pressure welding connection part 51, and a locking fixing part 53 in the intermediate part for engaging with the inner wall of the opening of the housing 10 and fixing the contact 50 at a predetermined position in the opening, The other end is provided with a contact portion 54 that receives the signal contact of the other party inserted through the introduction opening 11A and makes electrical contact therewith.

The position of the pressure welding groove 52 in the pressure welding connection portion 51 is
It is best to set the position offset from the center line of No. 4 by a distance equal to the arrangement pitch of the coaxial ribbon cables to be connected. When doing this, as best shown in Fig. 7, By arranging the signal contacts 50 disposed in the openings of the housing 10 in opposite directions in each row of the openings, the arrangement of the press-contact grooves 52 with respect to the center conductor of the coaxial cable is different from each other and the coaxial ribbon Can be matched to the pitch of the cable's center conductor.

FIG. 3 shows the ground contact hole 13 of the housing 10.
1 is a perspective view showing an example of a ground contact disposed in the ground contactor.

This ground contact 60 may be integrally formed from a conductive sheet material with spring properties, and has a plurality of legs formed at one end for electrically connecting to the periphery of the outer conductor of the coaxial ribbon cable. has been done.

These legs are made up of long legs 61 and short legs 62 arranged alternately, the tips 61A of the long legs 61 being at an acute angle, and the tips 62A of the short legs 62 being flat.

The bases of these legs are shaped to create enlarged grooves 63.

These enlarged grooves 63 are preferably made to have a width slightly larger than the diameter of the internal insulator so as not to come into contact with each internal conductor of the coaxial ribbon cable.

Of course, the arrangement pitch of these enlarged grooves 63 is the same as the arrangement pitch of the coaxial ribbon cables to be connected.

A housing 10 is attached to the other end of this ground contactor 60.
The introduction opening 1 is placed at the location corresponding to the introduction opening 12A of the
A contact portion 64 is formed to receive a mating ground contact inserted from 2A and make electrical contact.

Furthermore, in order to securely fix the ground contact 60 to the aperture of the housing 10, a convex portion 6 that engages with the wall surface of the aperture is provided.
5 and 66 are preferably formed.

The guide block 20 is made of an insulating material such as plastic, and has a recess 21 (see FIGS. 1 and 7 to 10) in which the end of the coaxial ribbon cable to be connected is received and positioned on the upper surface. It has grooves 22 (see FIGS. 7 to 10) on its lower surface for receiving and positioning the exposed inner conductors with inner insulators of the coaxial ribbon cable.

Further, on one side of the guide block 20, there is a groove 22A (a groove 22A) that extends from the valley groove 22 on the lower surface to the recess 21 on the upper surface and receives and positions the exposed inner conductor with inner insulator of the coaxial ribbon cable. 7 to 10) are formed.

The arrangement pitch of the valley grooves 22 and 22A is the same as the arrangement pitch of the coaxial cable of the coaxial ribbon cable.

Furthermore, the guide block 20 is provided with a recess (not shown) on the lower surface into which the tip of each insulation displacement connection part 51 of the signal contact 50 disposed in the housing 10 is received.

Furthermore, the guide block 20 is formed with a through hole (not shown) that penetrates from the center of the recess to the upper surface and receives the long leg 61 and short leg 62 of the ground contact 60. .

The through holes are wide on the receiving side of the long legs 61 and the short legs 62, and gradually narrow as they go to the opposite side,
The long legs 61 and short legs 62 of the ground contact 60 can be easily inserted into the socket.

Furthermore, on the other side of the guide block 20, there is an arched portion 24 (see FIG. 1) that creates an arched hole 23 for receiving the inner conductor with inner insulator of the coaxial ribbon cable and preventing its displacement. ) is formed.

The cable clamp 30 is made of an insulating material such as plastic, and has a recess (not shown) formed in the lower surface for receiving the tip of the long leg 61 of the ground contact 60 disposed on the housing 10. ing.

Next, a method for connecting a coaxial ribbon cable to the electrical connector as described above will be explained in detail.

First, as shown in FIG. 4, an outer sheath 41 at the end of a coaxial ribbon cable 40 and an outer conductor 42 as a ground wire.
and are removed by a predetermined length L, and the internal conductors 44 as signal lines of each coaxial cable are separated from each other with the internal insulator 43 attached.

Then, the outer covering 41 is further removed by a predetermined length L2 to expose the outer conductor 42.

The end of the coaxial ribbon cable 40 treated in this way is
As best shown in FIGS. 7 and 9, the outer covering 4
The part from which 1 is removed is the recess 2 on the upper surface of the guide block 20.
Each of the inner conductors 44 with inner insulators 43 arranged at 1 and separated from each other is arranged in the corresponding side groove 22A and lower surface groove 22, and is wound around the guide block 20.

In this case, the tips of the internal insulator-equipped internal conductors 43 and 44 are connected to each internal insulator-equipped internal conductor 4 as shown in FIG.
3.44 is inserted into each corresponding arched hole 23 of the arched portion 24 of the guide block 20 in order to avoid any displacement.

Here, the openings for arranging each contact in the housing 10 will be described in detail with reference to FIG. 6.

FIG. 6 shows a partially cutaway perspective view of the housing 10.

The housing 10 is formed with a plurality of signal contact holes 11 arranged in two rows for arranging the signal contacts 50, and these holes 11 each have a signal contact hole 11 arranged in two rows for arranging the signal contacts 50. They each communicate with the contact introduction opening 11A.

The housing 10 is further formed with contact receiving holes 12 that receive the contact portions 64 of the ground contact 60 at positions aligned with the rows of the holes 11.
are in communication with the ground contact introduction openings 12A described with reference to FIG. 1, respectively.

Furthermore, a gland contact hole 13 is formed in the housing 10 and extends to the center so as to connect the contact portion receiving hole 12.

This ground contact aperture 13 is connected to the ground contact 6
This is for receiving a portion having 0 protrusions 65 and 66 (see FIG. 3).

In this embodiment, the aperture 11B described with respect to FIG.
Opening hole 1 that communicates with the
1' is also formed in the housing 10.

The signal contact hole 11, the contact receiving hole 12, and the ground contact hole (L13) of the housing 10 are provided with the signal contact hole 50 and the ground shown in FIGS. 2 and 3, respectively. FIG. 7 shows a state in which the contactor 60 is inserted and installed.

For the housing 10 in which each contact is installed in this way,
The guide block 20 around which the end of the coaxial ribbon cable 40 is wound as described above is connected in the following manner.

As shown in FIG. 7, a suitably designed backing jig 80
is applied to the upper surface of the guide block 20 to push the guide block 20 into the housing 10.

At this time, the tip of the long leg 61 of the grounding contactor 60 passes through the through hole of the guide block 20 and brushes around the outer conductor 42 of the exposed coaxial cable 40, causing the outer sheathing 41 to pass through.
Mari sticks out.

The tip 62A of the short leg 62 of the ground contact 60 passes through the through hole of the guide block 20 and pushes up the exposed outer conductor 42 of the coaxial cable 40.

FIG. 8 shows a state in which this connection is completed. The internal conductor 44 with each separate internal insulator 43 is pushed into the insulation displacement groove 52 of the insulation displacement connection part 51 of the signal contact 50,
The signal contact 50 and the internal conductor 44 are connected to each other at the same time.

Here, with reference to FIG. 5, a solder plate used to strengthen the electrical contact between the ground contact 60 and the outer conductor 42 of the coaxial ribbon cable 40 will be described.

FIG. 5 shows an example of a solder plate in a perspective view.

This solder plate 70 is formed from a support plate 71 and tape solder 72.

The support plate 71 is formed of a metal plate, and the tape solder 7 is attached to it.
2 may be integrated into one by gluing them together, or may be formed separately.

The supporting plate 71 and the tape solder 72 have holes 1 and 7 through which the ends 61A of the long legs 61 of the grounding contacts 60 are passed.
1A and 72A are formed, respectively.

The positions of these holes should be offset to one side from the center of the solder plate, leaving an area on the other side where the heating plate will hit.

The tape solder 72 preferably contains flux.

A solder plate 70 such as that described in connection with FIG.
Holes 71A and 72A are passed through the tip 61A of the long leg 61 of the ground contact 60 protruding from the periphery of the exposed outer conductor 42 of 0, so that the tape solder 72 is placed on the outer conductor 42. Deploy.

In this state, a suitably designed heating member (not shown) is connected to the support plate 71 of the solder plate 70 and the solder plate 70.
The tip 6 of the long leg 61 of the ground contact 60 that protrudes further
1 Heat it by applying it to A.

At this time, the tape solder 72 melts and flows to the outer conductor 42 of the coaxial ribbon cable, the support plate 71 of the solder plate, the tip 61A of the long leg 61 of the ground contact 60, and the tip 62A of the short leg 62, They are closely soldered to each other, and the electrical contact between the outer conductor 42 of the coaxial ribbon cable and the ground contact 60 is strengthened.

This state is shown in FIG.

In FIG. 10, reference numeral 72' indicates fused solder.

If the cable clamp 30 is connected to the combination of the guide block 20, the housing 10, and the coaxial ribbon cable 40 as shown in FIG. 10, the coaxial ribbon cable in the connected state as shown in FIG. It can be used as an electrical connector.

The state of connection between the housing 10 and the guide block 20 is as follows:
As shown in FIG. 1, the locking tongues 14 provided on both sides of the housing 10 and the upper surfaces of the protrusions 25 provided on both sides of the guide block 20 are locked, and the guide block 20 is locked. 20 and the cable clamp 30 are connected to each other as shown in FIG.
Cable clamps 30 are inserted into through holes 26 (see FIG. 9) provided on both sides of the cable clamp 30 and protrude from and engage with the lower end of the protrusion 25 of the guide block 20. It is locked by the stop leg 31.

In order to clearly show the arrangement of the signal contact introduction opening and the ground contact introduction opening of the electrical connector of the above-described embodiment, FIG. 11 shows an end view of the electrical connector as seen in the direction of arrow A in FIG. It is shown in

In FIG. 11, reference numeral S indicates a signal contact introduction opening, G indicates a ground contact introduction opening, and blank indicates an unused opening.

FIGS. 12A and 12B show examples of other ground contacts that can be substituted for the ground contact 60 shown in FIG. 3 to obtain different ground patterns.

The ground contact 60A shown in FIG. 12A has three contact parts 64A, and the ground contact 60A can be used by appropriately deforming the housing 10 accordingly. By replacing the signal contacts in the openings into which they enter, with the ground contacts, it is possible to obtain the arrangement of the signal contact introduction openings and the ground contact introduction openings as shown in FIG. 13A.

Similarly, the ground contact 60B shown in FIG. 12B is
It is possible to obtain another ground pattern,
It has four contact portions 64B, and if the housing using such a ground contact 60B is modified appropriately, it will have a signal contact introduction opening as shown in FIG. 13B. It is possible to obtain an arrangement with the ground contact introduction opening.

In the above embodiment, the outer conductor and inner conductor of the coaxial ribbon cable and the ground contact and signal contact of the electrical connector are connected using a specific structure such as soldering or pressure welding. However, the present invention
The present invention is not limited to these connection structures, and can be similarly applied to connectors with various other connection mechanisms.

Since the electrical connector of the above-described embodiment of the present invention has the above-described configuration, the following effects can be obtained.

(1) Wrap the end of the coaxial ribbon cable around a guide block, divide the electrical connection points of the signal contact and ground contact to the inner conductor and outer conductor of the coaxial cable into two stages, and Since the electrical connectors are arranged in two rows, the overall size of the electrical connector can be reduced, and the wiring work can be easily performed on a large number of internal conductors and external conductors at the same time.

Furthermore, since the contact portion of the ground contact is arranged in the same row as the signal contact, the number of rows of contact introduction openings can be reduced to only two rows, and the thickness of the housing can be minimized. High-density packaging can be achieved.

(2) Since the ground contact plate is placed between the two rows of signal contacts, the impedance can be easily controlled, and the number of internal conductors of the coaxial ribbon cable, i.e.
By appropriately setting the position and number of ground contact portions (indicated by reference numbers 64, 64A, and 64B in FIGS. 3 and 12) relative to the number of signals, the ground pattern can be appropriately selected. Crosstalk caused by feedback current in electrical connectors can be easily prevented.

(3) The external conductors, that is, the ground wires, which are individually separated in the coaxial ribbon cable, are commonly connected using the common ground contact of this electrical connector, and the number of external grounds connected to the number of signals is reduced. It is economically advantageous because the amount can be reduced.

(4) By grooves and arched holes in the guide block,
Since it is possible to prevent the internal conductor from shifting during connection, reliable pressure connection can be performed.

(5) It is versatile and can be used with any coaxial ribbon cable having a braided shield or horizontally wound shield.

[Brief explanation of drawings]

Figure 1 of the accompanying drawings is a perspective view showing an electrical connector for a coaxial ribbon cable as an embodiment of the present invention in a connected state, Figure 2 is a perspective view of a signal contact used in the electrical connector of Figure 1; Figure 3 is a perspective view of the grounding contact used in the electrical connector shown in Figure 1, Figure 4 is a perspective view showing the coaxial ribbon cable in preparation for connection, and Figure 5 is a perspective view of the electrical connector shown in Figure 1. A perspective view of the solder plate used; FIG. 6 is a partially cutaway perspective view of the housing of the electrical connector shown in FIG. 1;
7 is a front view showing a state in which the electrical connector of FIG. 1 is ready to be connected to the housing and the guide block; FIG. 8 is a front view showing a state in which the electrical connector shown in FIG. Figure 9 is a partially cutaway perspective view showing the preparation state of soldering the outer conductor and ground contact of the electrical connector in Figure 1, and Figure 10 shows the outer conductor and ground contact of the electrical connector in Figure 1. Fig. 11 is a front view showing the completed state of soldering with the electrical connector. 12A and B are perspective views showing modified examples of the grounding contacts, and FIGS. 13A and B are the end views of the electrical connectors when the grounding contacts of FIGS. 12A and B are used. FIG. 12 is an end view similar to FIG. 11; 10...Housing, 11...Signal contact hole, 12...Contact part receiving hole, 13.
...Gland contact opening, 14...Latching tongue piece, 20...Guide block, 21...
... recess, 22.22A ... groove, 23 ...
... Arched hole, 24 ... Arch part, 35.
...Protrusion, 26...Through hole, 30...
... Cable clamp, 31 ... Locking leg,
40... Coaxial ribbon cable, 41...
・External coating, 42...Outer conductor, 43...
...Internal insulator, 44...Internal conductor, 50...
... Signal contact, 51 ... Pressure connection part,
52... Pressure groove, 54... Contact portion, 6
0...Ground contact, 61...Long leg, 62...Short leg, 63...Enlarged groove, 64...Contact Part, 70...Solder plate, 71...Support plate, 72...Tape solder.

Claims (3)

[Scope of utility model registration request] (1) A guide block part for arranging the end of the coaxial ribbon cable to be connected, a cable clamp part for connecting to the guide block part and clamping the coaxial ribbon cable, and a grounding part in the center. and a housing portion in which a main body of a contact is disposed and signal contacts are arranged on both sides of the main body of the ground contact, and the ground contact is provided with an arbitrary number of contact parts, are arranged in the same row as the arrangement of the signal contacts in the housing part, and when wiring, the tips of the ground contacts and the signal contacts are arranged in the guide block part. An electrical connector for a coaxial ribbon cable, wherein the electrical connector is connected to an outer conductor and an inner conductor at the ends of the coaxial ribbon cable, respectively. (2) The ground contact has a protruding portion that can protrude upward through the periphery of the outer conductor at the end of the coaxial ribbon cable disposed in the guide block, and the ground contact and the outer conductor at the end of the coaxial ribbon cable is made by soldering by heating tape solder placed on the outer conductor through the protruding portion. Electrical connector for coaxial ribbon cable as described in ). (3) The electrical connector for a coaxial novel cable according to claim (2), wherein a metal support plate is superimposed on the tape solder.