JPH01211870A - Electric connector for coaxial cable and connection thereof - 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 an electrical connector for coaxial cables and a method of connecting the same.

Conventional technology Conventionally, as electrical connectors for coaxial cables, for example,
There was one disclosed in Japanese Utility Model Publication No. 58-11022 by the present applicant. This conventional electrical connector for coaxial cables includes a guide plotter part for arranging the exposed and separated outer conductor at the end of the coaxial ribbon cable to be connected, and a guide plotter part for coupling to the guide plotter part to clamp the coaxial ribbon cable. and a housing part in which ground contacts and signal contacts are arranged. The ground contact includes a ground plate disposed 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 come into contact with the outer conductor at the end of the coaxial ribbon cable disposed in the guide block portion and project upwardly through the periphery of the outer conductor. The ground terminal has an outer conductor contact piece that can come into contact with 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 protrude upward 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, thereby connecting the ground plate and the ground terminal. After soldering the outer conductor, connect the cable clamp part and 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 predetermined length from which the outer sheath and outer conductor of the end of the coaxial ribbon cable must be removed is considerably long because it must be wrapped around the guide block in a mouth shape.

Therefore, there is a possibility that crosstalk may occur.

(2) The contact portions of the signal contactor and the ground terminal have the same shape, but the connection portions have different shapes. Therefore, the number of different types of parts increases, which increases the cost accordingly.

(3) The outer sheathing of the end of the coaxial cable or the cable from which the outer conductor has been removed is wound in the groove of the guide block in the shape of an opening, but this winding is extremely difficult and the wiring work cannot be mechanized. , 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 $111 cable is the same as the parallel pitch of the signal contacts, the housing, that is, the overall size of the electrical connector, cannot be made much smaller, and users' demands for smaller size I couldn't respond to that.

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

SUMMARY OF THE INVENTION An object of the present invention is to provide an electrical connector for coaxial cables and a method for connecting the same, which solves the above-mentioned conventional problems.

Means for Solving the Problems An electrical connector for a coaxial cable according to the present invention includes an insulating housing that arranges and holds a plurality of contacts each having a press-contact portion such that the press-contact portion protrudes upward, and a coaxial cable to be connected. a cable wiring member fixedly holding the stripped end portion of the cable and coupled to the insulating housing; and a connection connected to the exposed outer conductor of the stripped end portion of the coaxial cable. a ground plate having a portion, the ground plate being provided with a conductive piece having a connecting portion extending from a desired position of the connecting portion, and the conductive piece having a connecting portion extending from a desired position of the connecting portion; At least the connecting portion of the conductive piece of the ground plate or the center conductor with the exposed inner insulator of the stripped end portion of the coaxial cable is provided on the end surface opposite to the end surface from which the insulation displacement portion of the child is protruding. A pressure contact holding groove is provided on the bottom surface of the connection groove to receive the tip of the pressure contact portion of the contact, and the peeled end portion of the coaxial cable is exposed. The connecting portion of the ground plate is connected to the external conductor, and the center conductor with the exposed inner insulator of the terminal portion of the coaxial cable and the conductive piece of the ground plate are arranged in the corresponding connection grooves. When the cable wiring member fixedly holding the end portion of the coaxial cable is coupled to the insulating housing in such a manner that the end surface thereof faces the end surface of the insulating housing, It is characterized in that the connecting portions of the center conductor and the conductive piece corresponding to the press-contact portions of each contact are press-connected.

Furthermore, in order to connect a coaxial cable to such an electrical connector for a coaxial cable, according to the wiring method of the present invention, an insulating housing having a contactor is prepared, and the coaxial cable to be connected is connected. The terminal portion is peeled off to expose the central conductor with the outer conductor and the inner insulator over a predetermined length, and the connecting portion of the ground plate is placed on the exposed outer conductor and fixed by soldering, After shaping the terminal portion of the coaxial cable, the center conductor with the exposed internal insulator of the coaxial cable, and the conductive piece of the ground plate into a predetermined shape using a jig, the terminal portion of the coaxial cable is shaped into a predetermined shape using a jig. The cable wiring member is fixedly held so that the center conductor and the conductive piece with each internal insulator are disposed in each corresponding connection groove of the cable wiring member, and finally, the cable wiring member and the insulator are fixedly held. By coupling the contacts with the housing, the connection portions of the center conductor and the conductive piece with the corresponding internal insulators are connected to the pressure contact portions of the respective contacts 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 a coaxial cable of this embodiment has a contact part (not shown) for contacting a contact part of a contact of a mating connector, a center conductor 154 of a multi-core flat coaxial cable 150 to be connected, or a ground. a plurality of contacts 110 having press-contact parts 111 for connecting the connection parts 144 of the plate 140; an insulating housing 120 for arranging and holding these contacts 110 with the press-contact parts 111 protruding upward; This insulating housing 12
A ground plate 14 for grounding the cable wiring member 130 coupled to the top of the 0 and further the outer conductor 152 of the coaxial cable to any of the contacts 110.
0.

The contactor 110 is made of a conductive metal sheet material having spring properties, and includes a contact 1 (not shown) and a pressure contact portion 111. The pressure contact part 111 has a slit 11 for connecting the center conductor 154 of the coaxial cable 150 or the connecting part 144 of the ground plate 140, which will be described later.
2 is formed.

The insulating housing 120 is integrally molded from an insulating material such as a plastic material, and has a large number of contact array holes 123 penetrating from an upper end surface 121 to a lower end surface 122 and arranged in two rows in a staggered manner. Further, on both sides of the insulating housing 120, locking legs 132 are provided on a first cable wiring member 130A that constitutes a cable wiring member 130, which will be described later.
Guide grooves 124 are formed on the bottom walls of these guide grooves 124 to receive and guide the insulating housing 120 by engaging with locking protrusions 132A' provided on the locking legs 132A. A protrusion 125 is formed as a hook for locking the cable wiring member 130 in a coupled state.

The cable wiring member 130 is the first cable wiring member 13
0A and a second cable wiring member 130B. The first cable wiring member 130A and the second cable wiring member 130B are assembled with each other, and the first cable wiring member 130A has a second cable wiring member 130B extending in the front direction on both end surfaces thereof. An engaging arm 131A is formed to engage with and integrate with the locking arm 131A, and locking legs 132A are provided on both end surfaces, extending downward and having a locking protrusion 132A' at the tip. ing. A coaxial cable 150 is connected to the second cable wiring member 1 on one side of the first cable wiring member 130A.
A holding groove 133A is provided for holding the coaxial cable together with the coaxial cable 30B, and a dogleg-shaped recess 133A' is formed approximately in the middle of the holding groove 133A to prevent the coaxial cable from being pulled out. Furthermore, the first cable wiring member 130A
A connecting groove 134 connected to the holding groove 133A is provided on the lower surface of the
A and one row of pressure contact holding grooves 135A for receiving the pressure contact portions 111 of the contacts 110 are provided.

Similarly, a coaxial cable 150 is connected to one side of the second cable wiring member 130B.
A clamping groove 133A is provided to cooperate with and clamp the coaxial cable 0A, and a dogleg-shaped protrusion 8133B' is formed approximately in the middle of the clamping groove 133A to prevent the coaxial cable from being pulled out. There is.

Furthermore, a connection groove 134B connected to the holding groove 133B is formed on the lower surface of the second cable wiring member 130B,
In addition, one row of press-contact holding grooves 135B for receiving the press-contact parts 111 of the contacts 110 is provided.

The ground plate 140 is formed of a conductive metal sheet material, and as clearly shown in the perspective view of FIG. A connecting portion 145 is provided on the side. The conductive piece 141 includes an inclined portion 142, a flat portion 143, and the flat portion 143.
The connecting portion 144 is more upright. As clearly shown in the cross-sectional view of FIG. 3(B), the connecting portion 144 has an inverted T-shaped cross section.
It is composed of an elongated portion 144' and a thickened and shortened protrusion 144''. 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, contact arrangement hole 12 of insulating housing 120
3, the contact 110 is inserted and arranged.

(2) Next, as shown in FIG. 2, the outer conductor 152 of the multi-core flat cable 150 is made to a predetermined length.

Then, the center conductor 154 as a signal line of each coaxial cable is separated from each other with the inner insulator 153 still attached. Then, the outer covering 151 is further removed by a predetermined length L2 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 off at the cut portion 147 and removed. Then, the exposed end portion of the coaxial cable 150 is installed in a jig (not shown) having grooves having the same pitch as the connection grooves 134A of the cable wiring member 130, and the conductive piece 141 of the ground plate 140 is installed in a tool (not shown). is placed in an appropriate position and fixed by pouring solder into the hole 146 of the connecting portion 145.

(4) Next, as schematically shown in FIG.
50 is formed into a convex shape, and a center conductor 154 with an internal insulator 153 and a conductive piece 141 of the ground plate 140
be arranged separately. That is, each core wire 154 of the coaxial cable 150 is separated into upper and lower parts, and the conductive piece 141 of the ground plate 140 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) of the previous section, the coaxial cable 150
After processing the terminal, 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 recess 133A' of the first cable wiring member 130A
and a convex portion 133 of the second cable wiring member 130B.
Due to the cooperative action with B', the coaxial cable 150
It is firmly fixed and held so that it does not come off from the cable wiring member 130. In addition, the bent internal insulator 1
The center conductor 154 with 53 and the conductive piece 141 of the ground plate 140 are connected to the corresponding connection grooves 134A and 13.
It is located within 4B.

(6) Finally, the integrated cable and cable wiring member are placed 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 placed on top of 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 11 of the contactor 110
1 is connected to each core wire 154 of the coaxial cable 150 and the conductive piece 141 of the ground plate 140, and the connection of the electrical connector is completed (see FIG. 6).

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

The connection between the pressure contact part 111 and the conductive piece 141 is made by the sleeve of the pressure contact part 111, as shown in a partially enlarged view in FIG.
112, a connecting portion 144 in which the cross section of the conductive piece 141 is shaped like an inverted T is inserted.

Then, the convex portion 144'' of the connecting portion 144 connects to the slit 11.
It is plastically deformed by the spring compressive force of 2.

As a result, the connecting portion 144 has a higher contact force and a higher pulling force from the slit than a normal flat plate-like connecting portion, and the reliability of the connection increases accordingly.

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

FIG. 8 shows a coaxial cable 1 connected to the cable wiring member 130A.
50 is attached, and the pitch P2 when the terminal parts of the coaxial cable 150 are arranged in parallel with the connection grooves 134A and 134B of the cable wiring member 130.
The are 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 reduced, as shown in FIG.
41 can be placed at any position.

FIG. 1O is a partial diagram for explaining another embodiment of the present invention. In this embodiment, as shown in FIG. 10(A), the pressure contact portion 111A of the contact 110A has a recess 112A' formed approximately in the middle of the slit 112A. As shown in the cross-sectional view in FIG. 10(B), the connecting portion 144A of the conductive piece of the ground plate inserted into and connected to the slit 112A has a cross section formed in a substantially cross shape, and the elongated portion 144 A' central protrusion 144
A'' is provided.Connection B to such pressure contact 8111A
By inserting 144Δ, the protrusion 144A'' is fitted into the recess 112A' of the slit 112A, which further increases the contact force and pull-out force, and also increases the contact area, thereby reducing contact resistance. Furthermore, it is effective to use a coaxial cable whose center conductor is deformed as shown in FIG. 10(C) in accordance with the shape of the press-contact portion of the contact in this embodiment. That is, the protrusions 1 are formed in the left and right direction of the center conductor 154A.
54 A', the center conductor has the same effect as the connection part 144A of the ground plate, and the pressure contact part 111A of the contact 110A has the same shape and can be used in common. Also occurs.

FIG. 11 is a sectional view for explaining still another embodiment. In the embodiment described above, the ground plate 140
Although all unnecessary parts of the comb-like conductive piece 141 have been cut and removed at the cut portion 147, the present invention is not limited to this. For example, as shown in FIG.
(see FIG. 3), and the conductive piece 141, that is, the flat part 143, is bent together with the core wire of the coaxial cable to form the connection groove 134A of the cable wiring member.

134B.

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, and this work itself is the same as the work procedure in the above-mentioned embodiment. Therefore, do not repeat the explanation.

(2) Next, as shown in Fig. 12, the coaxial cable 15
A convex shape is formed using the cable molds 60A' and 60B' which hold the cable.

(3) Next, as shown in FIG. 13, the coaxial cable 150 is arranged on the first cable wiring member 130A, and the
to be installed. Then, the outer conductor 1 of the coaxial cable 150
The ground plate 140 is placed on top of the solder tape 160 so as to sandwich the solder tape 160 therebetween. Then, the heating jig 75 is further lowered to melt the tape solder 160 and remove the ground plate 140.
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 distributed, and the core wire arrangement mold 61 is moved as shown in the table 14, and the core wires of the coaxial cable are sorted. The wire 153 and the conductive piece 141 are pressed and shaped. At the same time, the cutting blade 200 is connected to the cable wiring member 130A.

It is preferable that the excess length of the core wire 153 is cut and removed by moving it along the side surface of the core wire 130B.

(5) Finally, in the same manner as in the above-described embodiment, the cable wiring member and the insulation ring are integrated to complete the connection of the connector.

In the above-mentioned embodiment, the coaxial cable to be connected is an all-integrated multi-core (FLAN) IJ-bond coaxial cable, but the present invention is not limited to this.
It can be similarly applied to electrical connectors in which a plurality of individual coaxial cables are arranged in parallel and connected, and the same effect can be achieved by applying it.

Effects of the Invention Since the coaxial cable electrical connector and its connection method 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) It is not necessary to separately provide contacts for signals and for ground, and they may have exactly the same shape, so the number of parts can be reduced and costs can be reduced.

(3) Each procedure for 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 can be made smaller. It is also possible to reduce the size of the connector as a whole.

(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, since the core wire arrangement pitch can be smaller than the parallel pitch of the coaxial cable, the conductive piece of the ground plate can be placed at 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. 3(A) is a partial perspective view showing the terminal processing state of the coaxial cable. FIG. 3(B) is a perspective view showing the ground plate of the electrical connector for coaxial cable in FIG.
The enlarged sectional view taken along the line A-A in Figure 3(A), Figures 4, 5 and 6 show the work procedure for connecting a coaxial cable to the coaxial cable electrical connector in Figure 1. A schematic diagram for explaining, FIG. 7 is a partial perspective view for explaining the press-connection state between the press-contact part of the contact and the connection part of the conductive piece of the ground plate in the electrical connector for coaxial cable of FIG. 1, FIG. 8 is a partially cutaway front view for explaining the relationship between the terminal portion of the coaxial cable arranged in the cable wiring member and the ground plate in the electrical connector for coaxial cable shown in FIG. 1, and FIG. FIG. 8 is a bottom view of the cable wiring member, FIG. 10 (A) is a partially enlarged view showing the pressure contact part of the contact in another embodiment of the present invention, and FIG. 10 (B) is the first
0 is an enlarged cross-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 0 (A),
FIG. 10(C) is an enlarged sectional view showing the shape of a core wire of a coaxial cable suitable for connection to the insulation displacement part of the contact in FIG. 1O(A), and FIG. A sectional view similar to FIG. 6 for explaining another embodiment, FIGS. 12, 13, and 14 are schematic diagrams for explaining another embodiment of the wiring connection method of the present invention. . 11'0... Contact, 111...
... Pressure contact part, 120 ... Insulation housing, 1
21... Upper 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, 134
A, 134B... Connection groove, 135A, 135B
... Pressure contact holding groove, 140 ... Ground plate, 141 ... Conductive piece, 142 ...
Slope portion, 143...Flat portion, 144...
... Connection part, 145 ... Connection part, 147
...Cut part, 150...Coaxial cable, 151...External covering, 152...
...Outer conductor, 153 ...Inner insulator, 15
4... Center conductor. Figure 2 +50 Figure 3 (A) (B) Figure 4 Figure 5 Figure 6 Figure 7 Figure 10 Figure 1I Figure 12

Claims (2)

[Claims] (1) An insulating housing that arranges and holds a plurality of contacts having press-contact parts with the press-contact parts protruding upward; and an insulating housing that fixes and holds the peeled end portion of the coaxial cable to be connected and insulates the coaxial cable. The cable wiring member is coupled to the housing, and the ground plate has a connecting portion that is connected to the exposed external conductor of the stripped end portion of the coaxial cable, and the ground plate is is provided with a conductive piece having a connecting part extending from a desired position of the connecting part, and an end face of the cable wiring member opposite to the end face from which the pressure contact part of the contact of the insulating housing protrudes, A connection groove is provided for arranging at least the connection portion of the center conductor with the exposed internal insulator of the stripped end portion of the coaxial cable or the conductive piece of the ground plate, and the connection groove is provided with the connection groove on the bottom surface of the connection groove. A pressure contact holding groove is provided to receive the tip of the pressure contact portion of the contact, and connects the connecting portion of the ground plate to the exposed external conductor of the stripped end portion of the coaxial cable. With the center conductor with the exposed internal insulator of the terminal portion of the cable and the conductive piece of the ground plate arranged in the corresponding connection groove,
When the cable wiring member that fixedly holds the end portion of the coaxial cable is coupled to the insulating housing with the end surface thereof facing the end surface of the insulating housing, the pressure contact portion of each of the contacts An electrical connector for a coaxial cable, characterized in that connection portions of the center conductor and the conductive piece corresponding to each other are connected by pressure contact. (2) In the method of connecting a coaxial cable to a coaxial cable connector according to claim (1), an insulating housing in which a contact is arranged is prepared, and the terminal portion of the coaxial cable to be connected is subjected to a peeling treatment, A central conductor with an outer conductor and an inner insulator is exposed over a predetermined length, and a connecting portion of a ground plate is placed on the exposed outer conductor and fixed by soldering, and the terminal portion of the coaxial cable and the After shaping the center conductor with the exposed inner insulator and the conductive piece of the ground plate of the coaxial cable into a predetermined shape using a jig, the end portion of the coaxial cable is fixed and held on the cable wiring member. the center conductor with each inner insulator and the conductive piece are disposed in each corresponding connection groove of the cable wiring member, and finally, by coupling the cable wiring member and the insulating housing,
A wiring connection method characterized in that the connecting portions of the center conductor and the conductive piece each having the inner insulator are connected by pressure contact to the pressure contact portions of the respective contacts.