JPH0334193B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an electrical connector for coaxial ribbon cables for electrically connecting cables such as coaxial ribbon cables.

BACKGROUND OF THE INVENTION Electronic devices such as computers that use coaxial cables for high-speed transmission systems have traditionally used ground common type connectors that allow the selection of ground positions as connectors for coaxial cables. Such coaxial cable connectors are disclosed in U.S. Pat.
Publication No. 11020, Publication No. 58-11022, and Publication No. 11020
There was one such as that disclosed in Publication No. 58-11023. All of these conventional electrical connectors have two types of contactors, and an appropriate number of these contacts are used to connect the signal line, and the remaining contacts are used to connect the ground line. I am trying to use it as. Further, in these electrical connectors, a spring coil, a hang plate, or the like is used for the common connection between the ground wire and the ground contact.

Problems to be Solved by the Invention In recent years, along with the increasing demand for higher density, there has also been an increasing demand for improved noise characteristics in the connector section. Therefore, the ratio of signal contacts to ground contacts in the connector is about 2:1, and it is necessary to increase the number of grounds.
However, since the conventional connectors mentioned above only have two rows of contacts, increasing the number of grounds to improve noise characteristics causes the problem that the number of connector signals decreases. come. Further, in the conventional common connection of the ground using a spring coiled connector or a solder plate, there are problems such as the connection cannot be made reliably and the connection work is time-consuming.

SUMMARY OF THE INVENTION An object of the present invention is to provide an electrical connector for a coaxial ribbon cable that can overcome these conventional problems.

Means for Solving the Problems The electrical connector for a coaxial ribbon cable according to the present invention has three rows of through cavities that are open at the lower end and receive the contact portions of the mating contacts, and open at the upper end and communicate with the through cavities. An insulating housing having three rows of contact accommodation cavities, a contact part at the lower end that contacts the contact part of the mating contact, and an insulation displacement connection part for connecting the cable core part at the upper end, the insulation displacement connection part. The left and right two of the three rows of contact accommodation cavities of the insulating housing are made to protrude upward.
A signal contact disposed in a contact housing cavity of a column, a contact portion at a lower end that contacts a contact portion of a mating contact, and a long leg at an upper end, with the long leg projecting upward. Of the three rows of contact housing cavities of the insulating housing, a ground contact disposed in the center row of the contact housing cavities, and two rows on the left and right that receive the insulation displacement connection portions of the signal contacts on the lower end surface. the long leg through openings arranged in one row in the center through which the long legs of the ground contact are passed through; It has a core positioning groove for receiving and positioning the cable core, and is connected to the upper end of the insulating housing when the cable core is connected to the insulation displacement connection part of the signal contact. the insulated guide block, a spring contact portion that makes spring contact with the long leg of the ground contact protruding from the upper end of the insulated guide block, and a ground wire pressure welding connection portion for connecting the ground wire of the cable. A busbar disposed in the busbar accommodating groove of the insulating guide block so that these pressure connection parts protrude upward, and a pressure connection part receiving part that receives the pressure connection part of the busbar that projects upwardly from the insulating guide block. an insulating holding plate having an opening and disposed at the upper end of the insulating guide block for protecting the pressure welding connection portion of the ground line of the cable; and a combination of the insulating housing, the insulating guide block, and the insulating holding plate. and a cable clamp for holding down and fixing the connected cable.

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

FIG. 1 is a schematic perspective view showing the electrical connector for a coaxial ribbon cable according to an embodiment of the present invention, and FIG. 2 is a sectional view of the electrical connector in the electrical connector shown in FIG. 1. As shown in these figures, the electrical connector for a coaxial ribbon cable of this embodiment includes an insulating housing 100 integrally formed of, for example, a plastic material, and an insulating housing 100 disposed in the insulating housing 100, for example, a spring-like material. A plurality of signal contacts 200 punched and bent from conductive material and the insulating housing 1
00, for example, a ground contact 300 punched out of a conductive material with spring properties.
and coupled to the insulating housing 100,
For example, an insulating guide block 400 integrally formed of a plastic material, a bus bar 500 disposed at the upper end of the insulating guide block 400 and punched and bent from, for example, a conductive material with spring properties, and a bus bar 500 made of, for example, a plastic material. An integrally molded insulating retaining plate 600 and an integrally molded insulated cable clamp 70 of, for example, plastic material.
0 and a metal cable clamp 800 formed of, for example, a metal material. Reference number 10
indicates a coaxial ribbon cable connected to the electrical connector, and reference numeral 20 indicates a pull-out strap that is attached to the top of the insulated cable clamp 700 and is used to pull out the electrical connector from its mating partner.

The structure of each member will be explained in detail below.

First, FIG. 3A is a plan view of the insulating housing 100, FIG. 3B is a front view thereof, FIG. 3C is a bottom view thereof, FIG. 3D is a side view thereof, and FIG. FIG. 2 is an enlarged cross-sectional view taken along line BB in FIG. A; As shown in these figures, the insulating housing 100 has 3 parts that are open at the lower end and receive the contact part of the mating contact.
A row of through cavities 101, 102 and 103 and each through cavity 101, 102 open at the upper end and corresponding to each other.
or 3 rows of contact housing cavities 10 communicating with 103
4, 105 and 106.
As will be described later, openings 107 are formed on both sides of the insulating housing 100, through which the loop-shaped hooking portion of the insulating guide block 400 and the locking leg at the lower end of the insulating cable clamp 700 are passed. Insulating housing 100 below 107
A latch protrusion 108 is provided on both sides of the insulating guide block 400 to lock the connection between the insulating housing 100 and the insulating guide block 400. Furthermore, the lower edge 109 of the outer wall of the opening 107 of the insulating housing 100 serves to engage the locking protrusion on the lower end of the locking leg of the insulated cable clamp 700 to lock these connections.

Next, FIG. 5 is a perspective view showing one of the signal contacts 200 disposed in the two rows of contact cavities 104 and 105 on the left and right sides of the insulating housing 100. This signal contact 200 has a contact portion 2 that receives a contact portion of a mating contact at its lower end and makes contact with the contact portion.
01, and has an insulation displacement connection part 202 at the upper end for connecting the cable core part. The pressure contact center of the pressure contact connection portion 202 of this signal contact 200 is
The center of the contact portion 201 is offset by one half of the arrangement pitch of the cable core portion. Therefore,
As best shown in FIG.
If the signal contacts 200 are arranged facing each other with respect to 04 and 105, the insulation displacement connection portions 202 of the signal contacts 200 arranged in the two rows of left and right contact receiving cavities 104 and 105 are as follows. They are different from each other, and their arrangement pitch is equal to the arrangement pitch of the cable core portion. The signal contact 200 is provided with a projection 203 for press-fitting and fixing it into the contact housing cavities 104 and 105. It is press-fitted and fixed.

FIG. 6 is a perspective view of the ground contact 300 disposed in the center row of contact receiving cavities 106 of the insulating housing 100. The ground contact 300 has a plurality of contact parts 301 connected to each other at the lower end thereof to receive and make contact with the contact part of the other contact, and has a plurality of long legs 302 connected to each other at the upper end. The ground contact 300 is provided with protrusions 303 for press-fitting and fixing it into the contact housing cavity 106, and these protrusions 303 are connected to the cavity 106.
The ground contact 300 is press-fitted and fixed by biting into the inner wall of the ground contact 300.

FIG. 7 is a perspective view showing a state in which the signal contact 200 and the ground contact 300 are arranged in the insulating housing 100.

Next, FIG. 8A shows an insulated guide block 400
8B is a front view thereof, FIG. 8C is a bottom view thereof, and FIG. 8D is a side view thereof. As shown in these figures, an insulated guide block 400
has insulation displacement connection receiving recesses 401 arranged in two rows on the left and right to receive the insulation displacement connection portions of the signal contact 200 on the lower end surface, and one row in the center that allows the long legs 302 of the ground contact 300 to pass through. It has a long leg through hole 402 and a core positioning groove 403 for receiving and positioning the cable core from the front surface through the bottom surface to the back surface. This groove 403 extends to the top on the front surface, but is closed halfway on the back surface. As clearly shown in the bottom view of FIG. 8C, a protrusion 404 is provided between the long leg through holes 402 through which the long legs 302 of the ground contact 300 are passed through on the bottom surface.
These protrusions 404 have the function of regulating the movement of the ground contact and preventing unnecessary pressure from being applied to the cable core when the cable core is connected to the insulation displacement connection part 202. do. Furthermore, a busbar housing groove 405 is provided on the upper end surface of the insulating guide block 400. Before and after this bus bar accommodation groove 405, stepped portions 406 and 4
07 is provided to bend the ground wire after it has been pressed against the bus bar as described later and to restrict its movement, and the front step is especially wide to prevent the excess ground wire from moving. We are trying to accommodate the president. Furthermore, loop-shaped latching portions 408 are provided at both ends of the insulated guide block 400, and a groove 409 is formed through which the latching legs of the insulated cable clamp 700 are passed. Furthermore, a long leg through hole 402 is provided in the bus bar housing groove 405.
As will be described later, between the contact spring part of the bus bar and the long leg 30 of the ground contact that is in contact with the contact spring part of the bus bar,
An upright post 410 is formed which acts as a restraint for the support part 2 to prevent it from slipping.

FIG. 9 is a perspective view showing a busbar piece 500A for forming the busbar 500 disposed in the busbar housing groove 405 of the insulating guide block 400. This bus bar piece 500A has a plate-shaped support part 502A provided by connecting a plurality of press-contact connection parts 501A for connecting ground lines, and a connecting part 503A extending laterally from the lower part of this support part 502A. It has a plurality of contact spring parts 504A and support parts 505A that extend upward through the contact springs 504A and 505A.

FIG. 10 shows the busbar piece 500A of FIG. 9,
A perspective view shows a busbar 500 formed by combining two busbar pieces with a similar busbar piece 500B, and FIG. The disposed state is shown in a perspective view. As shown in these figures, the busbar piece 500A and the busbar piece 500B are assembled facing each other so that the inner surfaces 504A' and 504B' of their corresponding contact spring parts 504A and 504B face each other, i.e. , the bus bar pieces 500A and 500B are assembled so as to be shifted relative to each other so that the insulation displacement connection parts 501A and 501B are shifted by the arrangement pitch of the ground wires, and the long legs 302 of the ground contactor 300 are connected to each other by the corresponding connection. Each corresponding contact spring portion 504A and 504B passes between portions 503A and 503B.
Contact is possible between the inner surfaces 504A' and 504B'.

FIG. 12A shows the busbar piece 50 shown in FIG.
0A is a plan view, FIG. 12B is a partially cutaway front view, and FIG. 12C is a side view thereof. Figure 12 B and C
As best shown in FIG. 2, protrusions 506A are formed on the support portion 502A of the bus bar 500A.
0 and the inner wall of the groove 405,
It serves to press-fit and fix the bus bar piece 500A into the groove 405.

With such a structure of the bus bar 500, the tongue-shaped contact springs 504A and 50 of the bus bar 500
When the long leg 302 of the ground contactor 300 is inserted into contact between the inner surfaces 504A' and 504B' of the bus bar 4B, a force acts in the direction in which the opposing bus bar pieces 500A and 500B close, and the ends and center of the bus bar There is no difference in the contact force of the springs, and a stable contact force can be obtained even if the width of the bus bar increases. Further, the two busbar pieces to be combined can be the same, and even if the number of cores of the connection cables differ, they can be molded using the same mold, which is advantageous in terms of cost. Furthermore, the busbar consists of two pieces,
The contact spring has a bent structure that hugs the long legs of the ground contact, allowing for a long spring length and a structure that does not take up space, reducing the stiffness of the spring. Furthermore, in the production of busbar pieces, the contact spring parts are independent in the longitudinal direction in an arched shape, and can be continuously processed into reel shapes, resulting in high productivity and excellent economic efficiency. .

FIG. 13 is a perspective view showing an insulating presser plate 600 disposed at the upper end of the insulating guide block 400. This insulating holding plate 600 has a pressure welding part receiving hole 601 for receiving the pressure welding part 501A, 501B of the bus bar 500 protruding above the insulating guide block 400, and has a pressure welding part receiving hole 601 for receiving the pressure welding part 501A, 501B of the bus bar 500 protruding above the insulating guide block 400. It is for protection. A groove 602 for passing a ground wire is formed at the lower end of this insulating holding plate 600.

14A is a plan view of the insulated cable clamp 700, FIG. 14B is a front view thereof, and FIG. 14C
is its side view. As clearly shown in FIG. 2, this insulated cable clamp 700 is provided with a cable deflection holding part 701 for deflecting and holding down the cable 10 and a cable holding part 702 for holding the cable 10. Furthermore, locking legs 703 extending downward are provided at both ends of the insulated cable clamp 700, and a locking protrusion 703A is provided at the lower end of the locking legs 703.

FIG. 15A is a front view of the metal cable clamp 800, FIG. 15B is a plan view thereof, and FIG. 15C is a cross-sectional side view thereof. Insulated cable clamps 70 are attached to both ends of this metal cable clamp 800.
metal cable clamp 800 against insulated cable clamp 700
An arm portion 801 is provided for coupling and fixing the insulated cable clamp 700, and as shown in FIG.
A cable clamping part 802 for clamping the cable 10 together with the cable 10 is provided.

FIG. 16 is a partially cutaway perspective view showing the contact state between the contact spring portion of the bus bar 500 and the long leg 302 of the ground contactor 300, and FIG.
1 is a partially cutaway perspective view showing the state before the long leg 302 is inserted into the contact spring portion of the bus bar 500, the first
7B shows the long leg 3 attached to the contact spring part of the bus bar 500.
FIG. 2 is a partially cutaway perspective view showing the state after 02 has been inserted.

Finally, for the coaxial ribbon cable electrical connector constructed as above, the coaxial ribbon cable 10
This will be briefly explained using an example of the order in which the wires are connected.

First, as shown in FIG.
00, a signal contact 200 and a ground contact 300 are arranged. In addition, as shown in FIG. 11, the busbar pieces 500A and 500B are combined and press-fitted into the busbar housing groove 405 of the insulating guide block 400, so that the busbar 5
Place 00.

On the other hand, the ends of the coaxial ribbon cable 10 to be connected are processed to individually expose the internal conductors with internal insulators, and also to individually expose the drain wires as ground wires, and if unnecessary, connect the external shield wires. are cut and removed.

Coaxial ribbon cable 1 with terminal treatment in this way
The internal conductors with internal insulation, which are the individually exposed cable core parts of 0, are arranged so as to be wound around the core part positioning grooves 403 of the corresponding insulated guide blocks 400, and in this state, the insulating housing 100 When and the insulating guide block 400 are coupled to each other, each internal conductor with an internal insulator is press-connected to each of the press-connection connection parts 202 of the signal contact 200. At this time, each of the long legs 302 of the ground contactor 300 is
As clearly shown in FIG. 7, it is inserted between the contact spring parts 504A and 504B of the bus bar 500, and comes into contact with the inner surfaces 504A' and 504B' of the contact spring parts.

Next, connect each of the exposed drain lines to the bus bar 5.
Pressure connection is made to each of the pressure connection parts 501A and 501B of 00. This state is shown in a partial perspective view in FIG. 18. In FIG. 18, reference numeral 11 indicates an internal conductor with an internal insulator, and reference numeral 12 indicates a drain line.

Next, the insulating holding plate 600 is placed on the insulating guide block 400, and finally, as shown in FIGS.
As best shown in the figure, an insulated cable clamp 700 is coupled to a combination as described above;
Connecting the metal cable clamp 800 to the insulated cable clamp 700 completes the cable connection.

Effects of the Invention The electrical connector for a coaxial ribbon cable of the present invention has the structure described above, and has one row of ground contacts between two rows of left and right signal contacts, which makes it superior to conventional connectors. It is possible to improve packaging density and improve noise characteristics.

Furthermore, according to the specific structure of the embodiment of the present invention as described above, the following effects can also be obtained.

(1) The bus bar and ground contact are connected by spring contact, and they are connected at the same time as wiring, which contributes to reducing the number of wiring steps.

(2) The insulation displacement parts of the two rows of signal contacts are arranged at the same spacing as the core wires of the cable, so
Since the signal wires are pressure-welded all at once, the number of wiring connections can be reduced.

(3) The drain wire connection method is pressure welding, so
There is no need for soldering, and the number of wiring connections can be significantly reduced.

(4) Since the long leg of the ground contact extends straight from the mating contact part of the ground contact to the drain wire connection part, the transmission distance of the ground wire is shortened and the ground noise characteristics of the connector are improved. ing.

(5) Protrusions with a height comparable to the diameter of the insulator of the internal conductor with internal insulator 11 are provided between the long leg through-holes of the guide block, so that when the ground contact moves due to mating etc. Since the movement is stopped by the protrusion, it is possible to prevent damage to the insulator.

(6) The tip and front of the pressure welding part of the drain wire is bent at right angles, and the drain wire is held down by a holding plate, so no load is applied to the pressure welding part when handling it during wiring. .

(7) Extra length is provided at the pressure welding part and the peeling part of the drain wire, so when external force is applied to the cable after connection, the force can be absorbed by the extra length, and the force is not transmitted to the pressure welding part. be able to.

(8) There is extra length at the tip of the pressure welding part of the signal line, so bend it into the guide block and attach it to the insulating housing 100.
Since the cable is covered with a protective cover part 110, the tip is bent and the excess length is cut at the same time as pressure welding, and the cable is aligned by placing the tip of the signal wire in the alignment groove of the guide of the jig. By doing so, the alignment work can be stabilized.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view showing the electrical connector for coaxial ribbon cable as an embodiment of the present invention, FIG. 2 is a sectional view of the electrical connector in the electrical connector shown in FIG. 1, and FIG. Figures 3B, 3C, and 3D are top, front, bottom, and side views, respectively, of the insulating housing of the electrical connector in Figure 1, and Figure 4 is B-B in Figure 3A. 5 is a perspective view showing the signal contact of the electrical connector of FIG. 1, FIG. 6 is a ground contact of the electrical connector of FIG. 1, and FIG. 7 is a perspective view of the signal contact of the electrical connector of FIG. 8A, 8B, 8C, and 8D are perspective views showing the state in which the ground contact and the ground contact are arranged, respectively, of the insulating guide block of the electrical connector shown in FIG. 1. A plan view, a front view, a bottom view, and a side view. FIG. 9 is a perspective view showing a busbar piece for configuring the busbar of the electrical connector of FIG. 1. FIG. A perspective view showing a busbar constructed using two busbar pieces,
11 is a partial perspective view showing the bus bar shown in FIG. 10 arranged on an insulating guide block; FIGS. 12A, 12B, and 12C are plan views of the bus bar pieces shown in FIG. 9; 13 is a perspective view showing the insulating press plate of the electrical connector in FIG. 1, and FIG. 14A, FIG. 14B, and FIG. 15A, 15B and 15C are respectively a front view, a top view and a sectional side view of the metal cable clamp of the electrical connector of FIG. 1. Figure 16 is a partially cutaway perspective view showing the contact state between the contact spring part of the bus bar and the long leg of the ground contact;
Fig. 7A is a partially cutaway perspective view showing the state before the long legs are inserted into the contact spring portion of the bus bar, and Fig. 17B is a partially broken perspective view showing the state after the long legs are inserted into the contact spring portion of the bus bar. The perspective view, FIG. 18, is a partial perspective view showing the state of pressure connection of the internal conductor with an internal insulator and the drain wire of the coaxial ribbon cable. DESCRIPTION OF SYMBOLS 10... Coaxial ribbon cable, 11... Internal conductor with internal insulator, 12... Drain wire, 100... Insulated housing, 101, 102, 103... Penetration cavity, 104, 105, 106... Contact accommodation cavity,
200... Signal contact, 201... Contact portion, 202
... Pressure connection part, 300 ... Ground contact, 301
...Contact part, 302...Long leg, 400...Insulation guide block, 401...Insulation connection part receiving recess, 402
...long leg through hole, 403...core positioning groove, 4
05...Busbar accommodation groove, 500...Busbar, 50
0A, 500B... Bus bar piece, 510A, 501
B... Pressure connection part, 502A, 502B... Support part,
503A, 503B...Connection part, 504A, 50
4B...Contact spring part, 504A', 504B'...Inner surface, 505A, 505B...Support part, 600...Insulation holding plate, 601...Insulation connection part receiving hole, 700
...Insulated cable clamp, 800...Metal cable clamp.

Claims (1)

[Scope of Claims] 1. An insulating housing having three rows of through cavities that are open at the lower end and receive the contact portions of the mating contacts, and three rows of contact receiving cavities that are open at the upper end and communicate with the through cavities. and a contact portion for contacting a contact portion of a mating contact at a lower end, and a pressure connection portion for connecting a cable core portion at an upper end, and the pressure connection portion is made to protrude upward, so that the insulating housing is Signal contacts disposed in left and right two rows of contact housing cavities of the three rows of contact housing cavities;
It has a contact part at the lower end that contacts the contact part of the other contact, and a long leg at the upper end, with the long leg projecting upward, so that the center of the three rows of contact accommodation cavities of the insulating housing is ground contacts disposed in the contact housing cavities of the rows, pressure contact receiving recesses arranged in two rows on the left and right to receive the pressure contact connection portions of the signal contacts on the lower end surface, and long legs of the ground contacts. It has long leg through holes arranged in one row in the center, has a bus bar accommodating groove on the upper end surface, and has a core positioning groove for receiving and positioning the cable core section on at least the lower end surface. an insulated guide block that is coupled to the upper end of the insulating housing when the cable core part is connected to the insulated connection part of the signal contact; The insulated guide block has a spring contact portion that makes spring contact with the long leg of the ground contact, and a ground wire pressure connection portion for connecting the ground wire of the cable, and these pressure connection portions are made to protrude upward. The busbar arranged in the busbar accommodating groove and the insulation guide block have an insulation displacement connection part receiving opening for receiving the insulation displacement connection part of the bus bar protruding above the insulating guide block, and protect the insulation displacement connection part of the ground line of the cable. an insulating holding plate disposed at the upper end of the insulating guide block; and a cable clamp for holding and fixing the connected cable by being coupled to the combination of the insulating housing, the insulating guide block, and the insulating holding plate. An electrical connector for a coaxial ribbon cable, comprising: 2. The bus bar includes a plate-shaped support section provided with a plurality of connected insulation displacement connection sections for connecting ground wires, and a plurality of interconnection sections extending upwardly from the lower part of the support section. These two busbar pieces are assembled facing each other so that the inner surfaces of their corresponding contact spring parts face each other, and then inserted into the busbar housing groove. 2. A coaxial coaxial member as claimed in claim 1, wherein the long leg of the ground contact passes between the corresponding connecting portions and comes into contact between the inner surfaces of the corresponding contact spring portions. Electrical connector for ribbon cable. 3. The busbar piece is provided with a support portion adjacent to each contact spring portion to prevent the contact spring portion and the long leg of the ground contactor contacted therefrom from shifting. Electrical connectors for coaxial ribbon cables as described in Section 1.