JPH0122225Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an electrical connector for connecting coaxial ribbon cables.

In recent years, as the propagation speed of integrated circuits in computer circuit systems has increased, coaxial cables with drain wires are used to transmit signals between circuits and between devices in order to minimize external noise and crosstalk. Ribbon cables are increasingly being used.

Conventionally, a method disclosed in US Pat. No. 4,040,704 and the like is known as a method for connecting an end of a coaxial ribbon cable with a drain wire to an electrical connector. The coaxial ribbon cable connector disclosed in U.S. Pat. No. 4,040,704 is the first
As clearly shown in Figures 4 to 4.
As shown in FIG. 1 or 3, the coaxial ribbon cable 10 is terminally processed by stripping off the outermost outer sheath to leave the drain wire 12 bare, and furthermore, the signal wire 11 is After stripping off the outer cover (intermediate insulator) to obtain bare wires, the bare wires of the drain wire 12 and the bare wires of the signal wire 11 are connected to the signal wire 1 as best shown in FIG.
1 upward and the drain wire 12 downward, and connect the signal line 1 from above to the pressure welding part 31 of the pressure contact terminal 30 with the pressure welding tools 40, 40'.
1 and the drain wire 12 are connected by pressure contact from below (see FIGS. 3 and 4). After the signal line 11 and the drain line 12 are connected by pressure welding, the pressure welding tools 40 and 40' are removed, and then the cable strain relief fitting 50 shown in FIG.
A, 50b clamps the cable and fixes it to the connector body 20 (see Figure 2).
It's becoming like that. However, the following problems remain in the pressure connection using the coaxial ribbon cable connector having the above-described structure.

Since the signal line and the drain line are bare wires, it is difficult to distinguish between the two, and the two may become entangled during press-connection, making the work difficult.

Since the signal line is a bare wire, the strength of its components is weakened and there is a risk of wire breakage.

When performing pressure welding, a complicated comb-shaped tool is used to connect the drain line and the signal line to the pressure contact portion of the pressure contact terminal, which results in an expensive tool and is economically problematic.

Since the pressure contact planes of the signal line and the drain line are not on the same plane, pressure contact cannot be made at the same time, and the structure of the connector body becomes correspondingly complicated.

The purpose of the present invention was developed in view of the problems of the conventional device, and is to provide an electrical connector for a coaxial ribbon cable that can easily press-connect a signal line and a drain line simultaneously on the same plane.

The electrical connector for a coaxial ribbon cable of the present invention has an end of a coaxial ribbon cable containing a drain wire arranged on the top surface, and a plurality of bare drain wires and signal wires by removing a predetermined length of the outer sheath from the end of the ribbon cable. A guide block has a guide groove for a bare drain wire that is rolled up and guided from the side surface to the bottom surface while separating and arranging them alternately, and a guide groove for a signal wire that is wider than the guide groove, and a guide groove on the bottom surface of the guide block. A housing having a plurality of press-contact terminals that are press-contacted to each of the guided bare drain wires and signal lines, and which is connected to the guide block from below, and a housing that is connected to the guide block from above the guide block. and a cable clamp that clamps and fixes the end of the ribbon cable on the upper surface of the guide block between the guide block and the guide block, and the bottom surface of the guide block has a cable clamp that communicates with the guide groove. Moreover, a recess is provided to form a space into which the pressure contact portion of the pressure contact terminal enters during pressure contact.

The embodiments shown in FIG. 5 and subsequent figures will be described below.

FIG. 5 is a partially cutaway perspective view of the coaxial ribbon cable connector of this embodiment in a press-connected state.
In the figure, this electrical connector includes a housing 200 having a signal female terminal 250a and a ground female terminal 250b as press-contact terminals, and ends of the signal wire 11 and drain wire 12 of the coaxial ribbon cable 10 to be connected. The cable clamp 400 fits into the housing 200 and fixes the end of the coaxial ribbon cable 10.

The housing 200 is made of an insulating material such as plastic by molding, and has a terminal guide at its front end for receiving a male terminal 510 of a male connector 500, as shown in FIGS. 9 and 10. Openings 201a and 201b are provided in an array. In this embodiment, all the holes 201a are signal terminal holes, and all the holes 201b are ground terminal holes.

FIG. 6 shows the female terminal hole 20 of the housing 200.
An example of a female terminal 250 inserted into 2a and 202b is shown in a perspective view. This female terminal 250 is integrally molded by pressing from a conductive sheet material with spring properties, and has a pressure connection portion 251 at one end having a pressure contact groove 252 for pressure connection the center conductor or drain wire of the coaxial ribbon cable. Terminal holes 202a, 20 of the housing 200 are provided in the middle part.
The female terminal is inserted into the terminal hole 2 by being fitted between the inner walls facing each other by the spring force between the inner walls of the terminals 2b and 2b.
02a, 202b in a predetermined position, and a terminal introduction opening 2 at the other end.
A contact portion 254 that receives the male terminal of the mating side inserted from 01a and 201b to make electrical contact.
It is equipped with The position of the pressure contact groove 252 in the pressure contact connection portion 251, that is, the position of the pressure contact groove 2 when inserted into the terminal holes 202a, 202b of the housing 200.
It is preferable that the positions of the terminals 52 be shifted from each other by a distance of 1/2 of the terminal arrangement pitch (see FIG. 7). To do this, the female terminal 250 is made by shifting the center of the pressure welding groove 252 and the center of the contact portion 254 by δ, as shown in FIG.
4 and arranged symmetrically facing each other. In this way, by shifting the pitch of the pressure welding grooves by 1/2, the signal line and the drain line can be easily distinguished and the pressure weld connection becomes possible.

Furthermore, a convex guide 203 is provided on the outer wall of the housing 200 to prevent incorrect connection with the mating connector 500. Correspondingly, the mating connector 500 is provided with a concave guide that is fitted into the convex guide 203. 503 is provided (FIG. 5).

Furthermore, the housing 200 is provided with protruding fixing latches 204 at four corners on the upper side of the housing 200 for fixing a guide block 300, which will be described later, to the housing 200, as best shown in FIG. ing. With this latch 204, the protruding fixing portion 3 of the guide block 300
04, so that the housing 200 and the guide block 300 are reliably integrated.

Further, the housing 200 is provided with an end wall 205 so that the ends of the signal wire and drain wire that have been terminal-treated are not exposed after being pressed together (FIGS. 5 and 10).

The guide block 300 is formed of an insulating material such as plastic, and is a signal wire guide groove that extends from the side surface to the bottom surface and guides and positions the signal wire 11 and the drain wire 12 of the coaxial ribbon cable with a drain wire to be connected by pressure welding. 301a, and a drain wire guide groove 301b (see FIG. 7).
These guide grooves 301a and 301b are formed so that the former is wide and the latter is narrow so as to be suitable for guiding the signal line and the drain line, respectively.

The guide block 300 further has a pressure connection part 251a of the signal terminal 250a that is pressure-connected to the signal line 11 and a pressure connection part of the ground signal terminal 250b that is pressure-connected to the drain line 12 in the guide grooves 301a and 301b on the lower surface of the guide block 300. Recesses 302a and 302b are provided to form spaces for receiving the wires 251b during pressure connection. and a recess 30 for the ground signal terminal 250b.
Since the drain wire 12 is thin, it is necessary to check the quality of the pressure welding, so the pressure welding hole 2b is particularly made to be a penetrating hole to facilitate visual inspection from the outside after the pressure welding. The drain wire 12 is inserted into the pressure contact hole 302b for the drain wire into the pressure contact groove 2 of the pressure contact connection portion 251b of the ground signal terminal 250b.
52b, the protrusion 302b' is provided with a side surface that forms a space slightly wider than the thickness of the pressure connection part 251b and faces closely to the pressure connection part 251b so that the pressure connection part 251b can be press-fitted easily and reliably into the pressure connection part 52b. (See Figures 7 and 11). By forming the protrusion 302b' as described above, the bare drain wire is sandwiched between the protrusion 302b' and press-fitted into the pressure contact groove 252b of the terminal without being caught in the upper direction of the pressure contact hole 302b during pressure connection. It becomes like this. Further, on both sides of the protrusion 302b', the pressure welding holes 30 can be easily formed even if the pressure welding connection portion 251b is slightly misaligned.
2b is provided with a wide portion 302b''.The cable clamp 400 is made of an insulating material such as plastic, and has a substantially L-shaped cross section as shown in FIG. A protrusion 401 is formed on one side of the lower surface of the cable clamp 400 for strongly pressing and clamping the end of the coaxial ribbon cable 10 with a drain wire, and a protrusion 401 is formed on the other side for clamping the end of the coaxial ribbon cable 10 containing a drain wire. drain line 1
A protective wall 402 for protecting 2 extends downward. Furthermore, the cable clamp 400 includes:
The cable clamp 400 is fitted into the housing 200 in a snap manner so as to fix the cable clamp 400 to the housing 200 when clamped. Note that on the top surface of the cable clamp 400,
A handle 403 is provided for pulling out the connector when the connector is used, and the handle 403
03 has a tab hole 403' for providing a pull-out tab (not shown).

Next, a description will be given of how to connect the coaxial ribbon cable with a drain wire to the above-mentioned electrical connector by pressure contact.

First, as shown in FIG. 7, the outer covering 13 of the coaxial ribbon cable 10 with a drain wire and the aluminum foil 14 serving as a ground are removed by a predetermined length. Then, the drain line 12 becomes a bare wire, and the signal line 11 is exposed as an insulated center conductor.

Next, the lower surface portions of the signal line guide groove 301a and the drain line guide groove 301b of the guide block 300 are arranged so as to match the signal lines 11 and drain lines 12 arranged on the housing 200, respectively.

Next, pressure connection portions 251 for signal wires and drain wires protrude from the housing 200.
The signal line 11 and the drain line 12 are connected to the pressure contact grooves 252a and 252b of the grooves 252a and 251b.
Alternately arrange each one facing 05 and press lightly. Then, using a tool 500A as shown in FIG. 12, both wires 11 and 12 are strongly press-fitted and welded together. Then, the protruding fixing part 304 of the guide block engages the latch 2 of the housing.
04, the guide block 300 is integrated with the housing 200.

Next, the coaxial ribbon cable 10 is fixed. Before fixing the signal line 11 and the drain line 12, as shown by the two-dot chain line in FIG.
the respective guide grooves 3 of the guide block 300.
01a and 301b, the coaxial ribbon cable 10 is bent while being wound around the guide block 300 so that the end thereof is placed on the upper surface of the guide block 300. Thereafter, the cable clamp 400 is placed on the upper part of the guide block 300, and then the cable clamp 400 is strongly pushed in with a tool 500B as shown in FIG. to be integrated into. At this time, the protrusion 401 of the cable clamp 400 strongly presses the end of the coaxial ribbon cable 10 to fix it.

Coaxial ribbon cable 10 thus pressure-welded
Terminals are fixed and protected from their surroundings.

Next, regarding the pressure welding hole 302b, the drain wire 1
An embodiment will be described in which it is possible to easily press fit 2 into the pressure contact groove 252b.

First of all, the side surface of the protrusion 302b provided in the press-contact hole 302b is tapered toward the press-contact direction, for example, in the shape of an inverted triangle as shown in FIG. In this way, the tip of the protrusion 302b can easily push the drain wire 12 into the pressure contact groove 252b opened in an inverted triangular shape.

Second, as shown in FIG. 14, a thin bridge 31 that enters the pressure groove 252b during pressure welding is provided approximately at the center of both opposing walls of the pressure welding hole 302b.
This is a result of multiplying the number by 2. Preferably, the tip of the bridge 312 is tapered in the pressing direction, and more preferably, the center of the lower end thereof is cut out in a semicircular shape. Such a bridge allows the drain wire to be easily and reliably pushed into the pressure groove.

Note that the above-mentioned tapered protrusion can also be applied to signal lines.

Since the present invention is constructed as described above, it has the following effects.

Since the signal wires and the drain wires can be reliably distinguished and arranged alternately according to the guide groove of the guide block, and can be press-connected simultaneously on the same plane, the connector and the press-connecting tool can be simplified, and the work can be made extremely easy.

The guide groove of the guide block extends from the side surface to the bottom surface, and the signal line and drain line are guided and wound around the guide groove, so that the two lines are reliably separated and do not come into contact with each other.

Since the cable clamp protrusion strongly clamps the end of the coaxial ribbon cable, the strength of the coaxial ribbon cable with connector is increased and it can be handled with confidence.

Furthermore, if the concave portion of the ground terminal guide groove is formed into a through groove as necessary, it becomes easy to confirm the pressure contact, and the efficiency of the inspection work is improved.

Further, by tapering the protrusion or bridge of the pressure welding groove, the pressure welding can be made even more reliable, and the reliability of the pressure welding connection can be improved.

[Brief explanation of the drawing]

FIGS. 1 to 4 show the conventional system, in which FIG. 1 is a perspective view showing the connector and coaxial ribbon cable separated, FIG. 2 is a perspective view showing the appearance after pressure connection, FIG. 3 is a sectional view before pressure welding, and FIG. 4 is a sectional view after pressure welding. Figures 5 to 14 show the electrical connector according to the present invention, and Figure 5 is a partially cross-sectional view of a coaxial ribbon cable pressed into contact with the connector, and a perspective view also showing the mating connector. , Fig. 6 is a perspective view of the female terminal of the connector, Fig. 7 is a partially enlarged perspective view of the relationship between the guide block, the end of the coaxial ribbon cable, and the pressure contact terminal of the connector, and Fig. 8 is a perspective view of the coaxial ribbon cable. 1 is a plan view, 2 is a front view, 3 is a side view, Fig. 9 is a cross-sectional view of the connector after pressure welding and before attaching a cable clamp, and Fig. 10 is the same as that in Fig. 9. 11 is a sectional view taken along line B-B in FIG. 10, FIG. 12 is a cross-sectional view of the cable clamp after it has been installed, 1 is a guide block with a tool, 2 is a front view of the cable clamp being installed, and FIG. 13 is is a partial cross-sectional perspective view showing another embodiment of the pressure welding hole;
FIG. 14 is a partially sectional perspective view showing still another embodiment of the pressure contact hole. 10... Coaxial ribbon cable, 11... Signal line, 12... Drain wire, 200... Housing 200, 250a, 250b... Press contact terminal, 25
2a, 252b...pressure groove, 300...guide block, 301a, 301b...guide groove, 302
a, 302b... recess (302b... pressure contact hole), 3
02b'...Protrusion, 312...Bridge, 400...
…cable clamp.

Claims (1)

[Claims for Utility Model Registration] (1) A plurality of bare drain wires and signal wires in which the ends of a coaxial ribbon cable with drain wires are placed on the top surface, and a predetermined length of the outer sheath is removed from the ends of the ribbon cables. A guide block having a guide groove for a bare drain wire and a guide groove for a signal line wider than the bare drain wire, which is wound and guided from the side surface to the bottom surface while separating and arranging them alternately; A housing is provided with a plurality of press-contact terminals for press-contacting each of the guided bare drain wires and the signal line, and is connected to the guide block from below and is coupled to the guide block; a cable clamp for clamping and fixing the end of the ribbon cable on the upper surface of the guide block between the guide block and the guide block; An electrical connector for a coaxial ribbon cable, characterized in that a recess is provided to form a space into which the pressure contact portion of the pressure contact terminal enters during pressure contact. (2) A request for registration of a utility model characterized in that, among the recesses provided on the bottom of the guide block, the recess for the ground pressure contact terminal that is pressure-connected to the bare drain wire is a pressure contact hole that penetrates to the top surface of the guide block. Electrical connectors for coaxial ribbon cables as described in scope (1). (3) The pressure welding hole has a hole on its inner wall to easily press fit the drain wire into the pressure welding groove of the ground pressure contact terminal.
The electrical coaxial ribbon cable according to claim (2) of the utility model registration claim, characterized in that the protrusion has a side surface facing the pressure contact terminal and forms a space slightly wider than the thickness of the pressure contact terminal. connector. (4) The electrical connector for a coaxial ribbon cable according to claim (3) of the utility model registration, wherein the side surface of the protrusion has a tapered shape in the pressure contact direction. (5) The insulation displacement hole is provided with a bridge that spans both walls of the insulation displacement hole and enters the insulation displacement groove of the insulation displacement terminal during pressure welding. Electrical connector for coaxial ribbon cable described in item 3). (6) The electrical connector for a coaxial ribbon cable according to claim (5) of the utility model registration, wherein the bridge has a cross section tapered in the pressure contact direction.