JPH0479112B2 - - Google Patents

Abstract

PURPOSE:To shorten the length of a portion of an external conductor to be removed, prevent the cross talk, decrease the types of components, and reduce the cost by forming contact pieces for the signal and ground into the same shape and pressure-connecting center conductors. CONSTITUTION:A portion of the external conductor 152 of a multi-core flat cable 150 is removed by the preset length, center conductors 153 are separated, with an inner insulator attached. The junction 145 of a ground plate 140 is mounted on the external conductor 152, the conductor 152 and the plate 140 are solder-fixed. The cable 150 is then clamped with cable wiring members 130a and 130b and integrated. The center conductor 153 and the conducting piece 141 of the ground plate 140 are arranged in the corresponding connecting grooves 134A and 134B. An insulating housing 120 is inserted in the cable wiring member 130, the center conductor 153 and the conducting piece 141 are press- connected. The cross talk is thereby decreased, the cost is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to electrical connectors for coaxial cables.

Conventional technology Conventionally, electrical connectors for coaxial cables include:
For example, there was one disclosed in Japanese Utility Model Publication No. 11022/1983 by the present applicant. This conventional electrical connector for coaxial cables includes a guide block part for arranging the exposed and separated outer conductor at the end of the coaxial ribbon cable to be connected, and a guide block part for connecting to this guide block part to clamp the coaxial ribbon cable. and a housing part in which ground contacts and signal contacts are arranged. The ground contact is
It consists of a ground plate placed between the signal contacts and a ground terminal having a contact portion that can come into contact with the other ground contact. The ground plate has long legs that can contact the outer conductor at the end of the coaxial ribbon cable disposed in the guide block and project upwardly through the periphery of the outer conductor. The ground terminal has an outer conductor contact piece that can contact the outer conductor at the end of the coaxial ribbon cable disposed in the guide block part in the part of the ground plate without the long legs and can project upwardly through the periphery of the outer conductor. To connect a coaxial ribbon cable to this electrical connector, heat the solder placed on the outer conductor through the long leg of the ground plate and the protruding part of the outer conductor contact piece of the ground terminal, and connect the ground plate to the ground. After soldering the terminal and the outer conductor, the cable clamp portion is coupled to clamp the coaxial ribbon cable.

Problems to be Solved by the Invention However, such conventional electrical connectors for coaxial cables have the following problems.

(1) The specified length from which the outer sheath and outer conductor at the end of a coaxial ribbon cable must be removed is:
Since it has to be wrapped around the guide block in a U-shape, it has to be wrapped around the guide block for a considerable length of time.
Therefore, there is a possibility that crosstalk may occur.

(2) The contact parts of the signal contactor and the ground terminal have the same shape, but the connection parts have different shapes. For this reason, the number of different types of parts increases, and the number of parts increases.
This results in high costs.

(3) The outer sheath of the end of the coaxial cable or the cable from which the outer conductor has been removed is wound around the groove of the guide block in a U-shape, but this winding is extremely difficult and it is not possible to mechanize the wiring work. , it is necessary to rely on manual labor, and mass production is not possible. Furthermore, the cost was high, many problems occurred during winding, and the reliability was low.

(4) Since the parallel pitch of the coaxial cable and the parallel pitch of the signal contacts are the same, the size of the housing, that is, the overall electrical connector, cannot be reduced so much, and it is not possible to reduce the size of the housing, in order to meet the demands of users for miniaturization. I couldn't help it.

(5) The external conductor contact piece of the ground terminal and the long leg of the ground plate are elongated in order to protrude above the external conductor of the coaxial cable. For this reason, the external conductor contact piece and the long legs of the ground plate have weak mechanical strength, and problems such as bending or breaking of these parts frequently occur during manufacturing and transportation processes.

An object of the present invention is to provide an electrical connector for coaxial cables that can solve these conventional problems.

Means for Solving the Problems The electrical connector for coaxial cables according to the present invention comprises:
an insulating housing that arranges and holds a plurality of contacts of the same shape each having a press-contact portion with the press-contact portions protruding upward; a cable routing member coupled to the housing;
a connecting portion connected to the exposed outer conductor of the stripped end portion of the coaxial cable; and extending from a desired position of the connecting portion and bending in a direction substantially perpendicular to the plane of the connecting portion. the cable wiring member includes a first cable wiring member and a second cable wiring member assembled with each other, and the first cable wiring member and the second cable wiring member A clamping groove for clamping the end portion of the coaxial cable is formed in at least one of the mating surfaces of the wiring members that are mated with each other, and a clamping groove for clamping the terminal portion of the coaxial cable is formed in at least one of the mating surfaces of the wiring members that are mated with each other. At least one end surface of the insulating housing that is opposite to the end surface from which the pressure contact portion of the contactor protrudes and is substantially perpendicular to the mating surface has a stripped end portion of the coaxial cable exposed. A pressure contact portion that is provided with a connection groove in which at least the connection portion of the conductive piece of the center conductor or the ground plate with an inner insulator attached thereto is disposed, and that receives the tip of the pressure contact portion of the contact at the bottom surface of the connection groove. A holding groove is provided to connect the connecting portion of the ground plate to the exposed outer conductor of the stripped end portion of the coaxial cable, and to connect the exposed inner insulator of the stripped end portion of the coaxial cable. The first cable wiring member is assembled such that the center conductor and the conductive piece of the ground plate are arranged in the corresponding connection grooves, and the terminal portions of the coaxial cable are held in the holding grooves. and when the cable wiring member consisting of the second cable wiring member is coupled to the insulating housing with the end face thereof facing the end face of the insulating housing, the pressure contact portion of each contact It is characterized in that the corresponding connection portions of the center conductor and the conductive piece are connected by pressure contact.

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 partially cutaway exploded parts arrangement perspective view showing an electrical connector for a coaxial cable as an embodiment of the present invention. The electrical connector for coaxial cable of this embodiment has a contact portion (not shown) for contacting the contact portion of the contact of the mating connector.
and multi-core flat coaxial cable 15 to be connected.
0 center conductor 154 or ground plate 140
A plurality of contacts 110 having press-contact parts 111 for connecting connection parts 144 of
an insulating housing 120 for arranging and holding 0 with the pressure contact part 111 protruding upward; a cable wiring member 130 coupled to the upper part of the insulating housing 120; and an outer conductor 152 of the coaxial cable. , one of the contacts 110
and a ground plate 140 for grounding.

The contactor 110 is made of a conductive metal sheet material having spring properties, and includes a contact portion (not shown) and a press-contact portion 111 . Pressure contact part 1
11 includes the center conductor 15 of the coaxial cable 150.
4, or a slit 112 for connecting a connecting portion 144 of a ground plate 140, which will be described later.

The insulating housing 120 is integrally molded with an insulating material such as a plastic material, and has a large number of contact array holes 12 penetrating from an upper end surface 121 to a lower end surface 122.
3 are arranged in two rows in a staggered pattern. moreover,
Guide grooves 124 are formed on both sides of the insulating housing 120 for receiving and guiding locking legs 132A provided on a first cable wiring member 130A constituting a cable distribution member 130, which will be described later. 124 has locking legs 13 on the bottom wall.
A hooking protrusion 125 is formed to engage with a locking protrusion 132A' provided at 2A to lock the insulating housing 120 and cable wiring member 130 in a coupled state.

The cable wiring member 130 includes a first cable wiring member 130A and a second cable wiring member 130B.
It is formed from. First cable wiring member 1
30A and the second cable wiring member 130B are
The first cable wiring member 130A is formed with engagement arms 131A on both end faces of the first cable wiring member 130A for engaging and integrating with the second cable wiring member 130B extending in the front direction. Furthermore, locking legs 13 are provided on both end surfaces, and extend downward and have a locking protrusion 132A' at the tip.
2A is provided. First cable wiring member 1
A holding groove 133A for holding the coaxial cable 150 together with the second cable wiring member 130B is provided on one side of the holding groove 13A.
A dogleg-shaped recess 133A' for preventing the coaxial cable from coming off is formed approximately in the middle of 3A. Furthermore, the first cable wiring member 130A
A connection groove 134A connected to the clamping groove 133A is formed on the lower surface of the contactor 110, and a pressure contact holding groove 135A for receiving the pressure contact portion 111 of the contact 110 is formed.
One row is provided.

Similarly, a holding groove 133A for holding the coaxial cable 150 in cooperation with the first cable wiring member 130A is provided on one side of the second cable wiring member 130B, and approximately in the middle of this holding groove 133A. A dogleg-shaped convex portion 133B' is formed in the portion to prevent the coaxial cable from coming off.
Furthermore, a connection groove 134B connected to the holding groove 133B is provided on the lower surface of the second cable wiring member 130B.
, and one row of press-contact holding grooves 135B for receiving the press-contact parts 111 of the contacts 110 are provided.

The ground plate 140 is formed of a conductive metal sheet material, and as clearly shown in the perspective view of FIG.
However, a connecting portion 145 is provided on the rear end side. The conductive piece 141 includes an inclined portion 142, a flat portion 143, and a connecting portion 144 standing upright from the flat portion 143. The connection part 144 is
As best shown in the cross-sectional view of Figure 3B,
Its cross section has an inverted T-shape, with an elongated elongated portion 144' and a thickened and shortened protrusion 14.
4''. A plurality of holes 146 are formed in the connecting portion 145.

Next, the procedure for assembling the electrical connector having such a configuration and connecting the coaxial cable will be explained.

(1) First, the contact 110 is inserted into the contact arrangement hole 123 of the insulating housing 120.

(2) Next, as shown in FIG.
Only _L1 is removed, and the center conductor 154 as a signal line of each coaxial cable is separated from each other with the internal insulator 153 attached. Then, the outer covering 151 is further removed by a predetermined length L ₂ to expose the outer conductor 152.

(3) Next, the connecting portion 145 of the ground plate 140 is placed on the outer conductor 152 of the coaxial cable 150 exposed in step (2)), and the cable and the ground plate are fixed by soldering. In this case, as shown in the partial front view of FIG. 8 and the bottom view of FIG. 9, only the necessary conductive piece 141 is left and the other conductive pieces are cut and removed at the cut portion 147. And the exposed coaxial cable 15
0 is placed in a jig (not shown) having a groove with the same pitch as the connecting groove 134A of the cable wiring member 130, and the conductive piece 141 of the ground plate 140 is placed at an appropriate position. Solder is poured into the hole 146 of the connecting portion 145 and fixed.

(4) Next, as schematically shown in FIG. 4, the coaxial cable 150 is formed into a convex shape, and the center conductor 154 with the internal insulator 153 and the conductive piece 141 of the ground plate 140 are separately arranged. do. That is, each core wire 154 of the coaxial cable 150 is separated upwardly and downwardly, and the ground plate 14
0 conductive piece 141 is also bent in an appropriate direction.
Then, the core wire arrangement mold 61 is moved to press the core wire 154 and the conductive piece 141 to shape them.

(5) In step (4) above, connect the coaxial cable 150
After processing the terminals of the coaxial cable 150, the coaxial cable 150 is sandwiched between the cable wiring members 130A and 130B to integrate the cable and the cable wiring member, as shown in FIG. At this time, the coaxial cable 150 is held tightly so that it does not come off from the cable wiring member 130 due to the cooperative action of the recess 133A' of the first cable wiring member 130A and the convex part 133B' of the second cable wiring member 130B. and is held fixed. Also, a center conductor 154 with a bent internal insulator 153;
The conductive piece 141 of the ground plate 140 is arranged in each corresponding connection groove 134A and 134B.

(6) Finally, the integrated cable and cable wiring member are installed in a receiving mold (not shown) facing in opposite directions, and a contact 110 with the top and bottom turned in the opposite direction is installed on the receiving mold (not shown). An insulating housing 120 is provided, and the insulating housing 120 is inserted into the cable wiring member 130 using a jig. Then, the pressure contact portion 111 of the contactor 110
is connected to each core wire 154 of the coaxial cable 150 and the conductive piece 141 of the ground plate 140,
The electrical connector wiring is completed (see Figure 6).

Next, details of the connection between the pressure contact portion 111 of the contactor 110 and the conductive piece 141 of the ground plate 140 will be described.

The connection between the pressure contact part 111 and the conductive piece 141 is made by the seventh
As shown partially enlarged in the figure, the pressure welding part 1
A connecting portion 144 of a conductive piece 141 having an inverted T-shaped cross section is inserted into the slit 112 of No. 11. Then, the convex portion 144'' of the connecting portion 144 is plastically deformed by the spring compressive force of the slit 112. As a result, the connecting portion 144 is less susceptible to contact force and from the slit than a normal flat plate-like one. The higher the pull-out force, the more reliable the connection.

Next, the parallel pitch of the coaxial cable and the pitch when the exposed end portion of the coaxial cable 150 is arranged in parallel with the connection groove 134 of the cable wiring member 130 will be explained using FIGS. 8 and 9.

FIG. 8 shows the state in which the terminal portion of the coaxial cable 150 is attached to the cable wiring member 130A, and shows the state in which the terminal portion of the coaxial cable 150 is arranged in parallel with the connection grooves 134A and 134B of the cable wiring member 130. Pituchi P ₂ has been made smaller.
As a result, the cable wiring member 130 can be made smaller, and the entire connector can also be made smaller. Furthermore, since the pitch _P2 can be made small, the conductive piece 141 of the ground plate 140 can be placed at any position as shown in FIG.

FIG. 10 is a partial diagram for explaining another embodiment of the present invention. In this example, FIG.
As shown in FIG.
has a recess 1 approximately in the middle of the slit 112A.
12A' is formed. And Figure 10B
As shown in the cross-sectional view, the slit 112A
Connection part 1 of the conductive piece of the ground plate inserted and connected to
44A has a cross section approximately shaped like a cross,
A central protrusion 144A'' of the elongated portion 144A' is provided.
By inserting the protrusion 144A'' into the recess 112A' of the slit 112A, the contact force and pull-out force are further increased, and the contact area is also expanded, so that the contact resistance is reduced. Furthermore, according to the shape of the pressure contact part of the contact of this embodiment,
It is effective to use a coaxial cable with a modified center conductor, as shown in . That is, by forming the center conductor 154A in an irregular shape with protrusions 154A' provided in the left-right direction, it has the same effect as the connection part 144A of the ground plate, and also has the same effect as the connection part 111A of the contact 110A. Another advantage is that they have the same shape and can be used in common.

FIG. 11 is a sectional view for explaining still another embodiment. In the above-described embodiment, all unnecessary parts of the comb-like conductive piece 141 of the ground plate 140 were cut and removed at the cut portion 147, but the present invention is not limited to this. isn't it. For example, as shown in Figure 11,
The conductive piece 141 is cut at the bending slit portion 148 (see FIG. 3), and the conductive piece 141, that is, the flat portion 143 is bent together with the core wire of the coaxial cable to form the connecting groove 134 of the cable wiring member.
A, 134B may also be inserted. By doing so, the effect of preventing crosstalk can be improved more than in the case of the embodiments described above.

FIG. 12, FIG. 13, and FIG. 14 are schematic diagrams for explaining other embodiments of the wiring method of the present invention. The working procedure in the wiring method of this embodiment is as follows.

(1) First, the insulating housing 120 in which the contacts 110 are arranged is prepared and the terminals of the multi-core flat cable are processed, but this work itself is as follows.
Since these work procedures are the same as those in the embodiment described above, they will not be described repeatedly.

(2) Next, as shown in FIG. 12, the coaxial cable 150 is formed into a convex shape using sandwiching cable molds 60A' and 60B'.

(3) Next, as shown in FIG. 13, the coaxial cable 150 is arranged on the first cable wiring member 130A and installed on the stand 70. Then, tape solder 1 is placed on the outer conductor 152 of the coaxial cable 150.
Place the ground plate 140 so that the ground plate 60 is sandwiched therebetween. Then, the heating jig 75 is further lowered to melt the tape solder 160 and ground plate 1.
40 and the outer conductor 152 are fixed.

(4) Next, the other cable wiring member 130B is assembled and integrated, the core wires of the coaxial cable are sorted, and the core wire arrangement mold 61 is moved as shown in the table 14 diagram. The wire 153 and the conductive piece 141 are pressed and shaped. At the same time, the cutting blade 200 is attached to the cable wiring member 130.
It is preferable that the excess length of the core wire 153 is cut and removed by moving it along the side surfaces of the core wires 153 and 130B.

(5) Finally, in the same manner as in the previous embodiment, the cable wiring member and the insulating housing are integrated, and the connection of the connector is completed. In the above-mentioned embodiment, the coaxial cables to be connected are all integrated multi-core flat ribbon coaxial cables, but the present invention is not limited to this, and the present invention is not limited to this. , it can be similarly applied to electrical connectors for wiring,
It can also be applied to achieve similar effects.

Effects of the Invention Since the electrical connector for coaxial cables and the connection method thereof of the present invention have the above-described configuration,
It has the following effects.

(1) Since the length of the outer conductor of the coaxial cable to be connected can be made shorter than before, there is no risk of crosstalk occurring.

(2) There is no need to provide separate contacts for signal use and ground use, and they may have exactly the same shape, so the number of parts can be reduced and costs can be reduced.

(3) Each step of connecting the coaxial cable to the connector is simplified and requires less manual labor, allowing for mechanization, which increases product reliability and enables mass production. Therefore, it is possible to reduce costs.

(4) It is also possible to make the arrangement pitch of the connection grooves in which the core wires of the cable wiring member are arranged smaller than the parallel pitch of the coaxial cable, so in that case, the size of the cable wiring member It is also possible to reduce the size of the entire connector.

(5) When a protrusion is provided on the connecting part of the ground plate, the contact force when the connecting part is inserted into the slit provided in the pressure welding part of the contact can be increased, and the pulling-out prevention force can be increased. The reliability of the connection can be increased accordingly.

(6) As mentioned above, it is possible to make the core wire arrangement pitch smaller than the parallel pitch of the coaxial cable, so the conductive piece of the ground plate can be placed in any position. This makes it possible to freely select the ground pattern.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view of an exploded parts arrangement showing an electrical connector for coaxial cable as an embodiment of the present invention, and FIG. FIG. 3A is a perspective view showing the ground plate of the coaxial cable electrical connector shown in FIG. 1, and FIG. The enlarged line sectional views, FIGS. 4, 5, and 6 are schematic diagrams for explaining the work procedure for connecting a coaxial cable to the coaxial cable electrical connector shown in FIG. 1, and FIG. 1 is a partial perspective view of the coaxial cable electrical connector shown in FIG. Part 9 is a partially cutaway front view for explaining the relationship between the terminal part of the coaxial cable arranged in the cable wiring member and the ground plate in the electrical connector for cable.
The figure is a bottom view of the cable wiring member in Figure 8,
0A is a partially enlarged view showing the pressure contact part of the contact in another embodiment of the present invention, and FIG. 10B is the 10th embodiment.
Figure 10C is an enlarged sectional view showing the shape of the connection part of the conductive piece of the ground plate suitable for pressure connection to the pressure contact part of the contact in Figure A. FIG. 11 is an enlarged cross-sectional view showing the shape of a core wire of a coaxial cable suitable for connection; FIG. 12 is a cross-sectional view similar to FIG. 6 for explaining yet another embodiment of the present invention; FIGS. 13 and 14 are schematic diagrams for explaining another embodiment of the wiring method of the present invention. 110... Contact, 111... Pressure contact part, 120
...Insulating housing, 121...Top end surface, 122
...Lower end surface, 123...Contact array hole, 130...
... Cable wiring member, 130A... First cable wiring member, 130B... Second cable wiring member,
133A, 133B... holding groove, 134A, 13
4B... Connection groove, 135A, 135B... Pressure contact holding groove, 140... Ground plate, 141... Conductive piece, 142... Inclined part, 143... Flat part, 14
4... Connecting portion, 145... Connecting portion, 147... Cut portion, 150... Coaxial cable, 151... Outer covering, 152... Outer conductor, 153... Inner insulator, 154... Center conductor.

Claims (1)

[Claims] 1. A plurality of contacts of the same shape having pressure contact parts,
an insulating housing arranged and held in such a way that its press-contact portion projects upward; a cable wiring member fixedly holding a stripped end portion of a coaxial cable to be connected and coupled to the insulating housing; A coupling portion connected to the exposed outer conductor of a stripped terminal portion of a coaxial cable and extending from a desired location of the coupling portion and bent in a direction substantially perpendicular to the plane of the coupling portion. a ground plate having a conductive piece provided with a connecting portion, and the cable wiring member includes a first cable wiring member and a second cable wiring member assembled with each other, and the first cable wiring member and the second cable wiring member are assembled with each other. A clamping groove for clamping the end portion of the coaxial cable is formed in at least one of the mating surfaces of the members that are mated with each other, and at least one of the first cable wiring member and the second cable wiring member On one end face of the insulating housing, which is opposite to the end face from which the pressure contact portion of the contactor protrudes, and which is substantially orthogonal to the mating face, there is an exposed end face of the stripped end portion of the coaxial cable. A press-contact part holder, which is provided with a connection groove for arranging at least the connection part of the center conductor with an internal insulator or the conductive piece of the ground plate, and receives the tip of the press-contact part of the contact at the bottom surface of the connection groove. A groove is provided to connect the connecting portion of the ground plate to the exposed outer conductor of the stripped end portion of the coaxial cable, and connect the exposed inner insulator of the end portion of the coaxial cable to the exposed outer conductor of the stripped end portion of the coaxial cable. the first cable wiring member, which is assembled so that the center conductor and the conductive piece of the ground plate are arranged in the corresponding connection grooves, and the terminal portions of the coaxial cable are held in the holding grooves; and When the cable wiring member consisting of the second cable wiring member is coupled to the insulating housing with the end face thereof facing the end face of the insulating housing, each An electrical connector for a coaxial cable, characterized in that the corresponding connecting portions of the center conductor and the conductive piece are connected by pressure contact.