JP2595330B2 - Electrical connector for multi-conductor cable - Google Patents

Description

The present invention relates to an electrical connector for a multi-conductor cable,
More specifically, the present invention relates to an electrical connector for electrically connecting a flexible flat cable (so-called flat cable) in which signal wires and ground wires are arranged to an external circuit.

[Conventional technology]

Conventionally, in this type of electrical connector, for example, in Japanese Patent Application Laid-Open No. Sho 58-66271, a signal wire and a ground wire of a flat cable are electrically connected to respective contacts of the electrical connector. That have a structure that can be connected by pressure to the slot formed in the wire connection part, and the ground wire can be connected collectively to the wire connection part of the ground plate and can be connected to an external circuit by a ground contact that can be replaced with a signal contact Is disclosed.

According to the connector, compared to a connector in which the electric wire and the contact are connected by the soldering means, for example, when the ground circuit of the external circuit is changed, without changing the structure of the ground plate There is an advantage that it can cope with it and that the assembling work of the cable and the connector is easy.

[Problems to be solved by the invention]

However, the connector has a unique structure in which the signal wire and the ground wire exposed from one end of the cable are bent at substantially right angles in opposite directions to each other and press-contacted to the wire connection portions of the signal contactor and the ground plate, respectively. , External circuit (device)
Therefore, there is a drawback in that it cannot be used for a connector of a type in which an electric wire is axially extended from one end of a cable and is connected to a grounding plate and a contact by pressure contact and becomes bulky.

Therefore, a main object of the present invention is to provide the connector having the advantages of the connector, and furthermore, the connection portion of the ground plate and the signal contact while the electric wire extends axially from one end of the cable onto the plate surface of the ground plate. The crimping or crimping connection can be made to the connection part of the grounding plate, and the height of the wire arrangement between the ground wire crimped or crimped to the connection part of the ground plate and the signal wire crimped or crimped to the connection part of the signal contactor It is configured so that there is a step, and this step avoids the danger of contact between the signal wire and the ground wire when assembling the cable and the connector.
An object of the present invention is to provide a connector which can facilitate the assembling work.

[Means for solving the problem]

In order to solve the above-mentioned problem, the present invention provides a grounding plate for press-connecting the grounding wires of a flat cable in which signal wires and grounding wires are arranged at a predetermined pitch, and a contact having a wire connecting portion. In the electrical connector for a multi-conductor cable having the following, the grounding plate is a plate surface along a connector fitting direction and a cable arrangement direction substantially parallel to the connector fitting direction, and a plate surface at an end opposite to the fitting surface. A ground wire connecting portion formed by being bent at substantially a right angle, a pair of the ground wire contact portions facing outward and a pair of the ground wire connecting portions being arranged back to back; Has a through hole for a ground contact penetrating and press-fitting toward the outside, and the connection between the ground plate and the contact and the ground wire is performed on the outside of the plate surface. Multi-conductor cable In electrical connector.

Furthermore, the present invention provides a multi-conductor cable having a ground plate for collectively press-connecting the ground wires of a flat cable in which signal wires and ground wires are arranged at a predetermined pitch, and a contact having a wire connection portion. The grounding plate is formed by bending a plate surface along a connector fitting direction and a cable disposition direction substantially parallel to the connector fitting direction, and at a right angle from the plate surface at an end opposite to the fitting surface. The ground wire contact portion is provided, a pair is arranged back to back with the ground wire contact portion facing outward, and the wire contact portion of the contactor faces the outside in the plate surface of each of the pair. It has a through hole for a signal contact which is disposed in a non-contact manner, and that the connection between the grounding plate and the contact, the grounding wire and the signal wire is performed on the outside of the plate surface, respectively. Characteristic multiplexing In electrical connector for body cable.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 and 2, the connector 10 includes a housing 11, a base 12, a holding frame 13, and a pair of upper and lower cover plates 14, which are made of an insulator. The housing 11 has a cavity 17 connected to an opening 16 arranged at a predetermined pitch in the horizontal direction in two steps above and below the one end face 15, and a vertically spaced upper and lower face adjacent to an end face 18 opposite the one end face 15. There are arranged through holes 19, hooks 20 extending toward the base 12 on both sides along the length direction of the end face 18, and ribs 22 on both outer concave faces 21.
The base 12 has upper and lower surfaces with projections 23 which engage with the through holes 19, T-shaped grooves 24, 24 'whose center line coincides with the cavity 17, and a slope 26a and a thin flat plate 26b on the side opposite to the one end face 25. Part formed with 26
And a hook 27 that engages with both end hooks 20 along the length direction of the one end face 25. The grooves 24, 24 'are arranged in a staggered manner. The holding frame 13 has a side wall 28 that sandwiches and covers both sides of the housing 11 and the base 12, a slope 29 at one end, and a V-shaped groove 30 at the center.
(FIG. 3C). The side wall 28 has a projection (not shown) on the inner surface for engaging with the rib 22. The covering plate 14 has a V-shaped ridge 31 facing the V-shaped groove 30 and concave notches 32 on both sides,
The upper and lower surfaces of the base 12 and the holding frame 13 are covered with a space therebetween, and the recesses 32 engage with the locking portions 33 located on both sides of the holding frame 13. As described above, in a state where the cover plate 14 is located, the cover plate and the holding frame 13 are separated from each other by the channel 34 (third C
Figure). Cable 60 is located in channel 34,
The cable is held between the holding frame 13 and the covering plate 14.

2, 3A to 3C, the connector further comprises a predetermined number of signal contacts 40 and ground contacts 41.
And a pair of upper and lower grounding plates 50, which are formed by stamping a metal plate. Signal contact 40 and ground contact 41
Has a pair of elastic contact portions 42, an intermediate portion 43, and an electric wire connection portion 46 which is bent at a right angle upward from one end of the intermediate portion and has a slot 44 at the center and claws 45 at both side edges. The signal contact 40 and the ground contact 41 have a projection 47 on one side.
Except for having (FIG. 4), it is formed in the same shape. The signal contact 40 and the ground contact 41 have a contact portion 42 in the housing.
11, the intermediate portion 43 and the lower end of the wire connection portion 46 are pressed into the grooves 24, 24 'of the base 12, and the wire connection portions protrude upward, so that the grooves 24, 24' of the claw 45 protrude upward. Is retained by biting into

The grounding plate 50 has a groove 51 as a lower surface in the length direction on one side located on the slope 29 side of the holding frame 13, and a ground exposed from one end of the cable 60 in the length direction of the wire connection portion 52 of the groove. Electric wire 60b
Slot 53 for crimping
and a through hole 56 positioned between the pitch L ₁ of the through-hole 55 and signal wires 60a which coincides with the pitch L ₁ of a. The two through holes 55 and 56 are arranged in a staggered manner, and the through hole 55 is larger than the through hole 56. A pair of upper and lower grounding plates 50 are provided with contacts 40 and 41 projecting from the board surface of the base 12.
In a state in which the wire connection portions 46 penetrate through holes 55 and 56 and protrude upward and downward, the wire connection portion 46 stably overlaps the plate surface of the base 12 and sandwiches the base, and the groove 51 of one ground plate A claw 57 at one end is engaged with a recess 58 at one end of the other ground plate, and a claw 57 of the other ground plate is engaged with a recess 58 at the other end of the groove 51 of the other ground plate. By doing so, it is fixed to the substrate 12. As shown in FIG. 4, the wire connection portion 46 of the signal contact 40 does not contact the periphery of the through hole 55, and the ground contact
The wire connection portion 46 ′ of 41 presses against the side edge of the through hole 56 via the protrusion 47. The grounding plate 50 facing the center of the through hole 56 has a through hole 56 when the wire connecting portion 46 'is pressed against the through hole 56 via the protrusion 47.
A through hole 59 is provided so that a part of the ground plate 50 between them can escape to facilitate the pressure contact. Referring again to FIG. 2, FIG. 3A to FIG. 3C, each ground wire 60b exposed from one end of the cable 60 extends to the ground plate 50 along the slope 29 of the holding frame 13, and is connected to the wire connecting portion 52. And electrically connected to the ground plate at a time. The signal wire 60a exposed from one end of the cable 60 extends on the plate surface of the ground plate 50 without contacting the ground plate 50, and is connected to the slot 44 of the wire connection portion 46 of the signal contact 40 by pressure contact to connect an external signal. Make an electrical connection to the circuit. The electrical connection between the ground plate 50 and the external ground circuit is at least one,
Preferably, the connection is made via the electric wire connection portion 46 of two or more ground contacts 41. The position and number of the ground contacts 41 for electrical connection to the external ground circuit can be arbitrarily selected depending on the position and number of the ground circuit.

Thus, the signal contact 40, the ground contact 41, the cable
When the signal wire 60a and the ground wire 60b
As is clear from FIGS. 3A and 3C, a level difference occurs between the signal wire 60a and the ground wire 60b on the surface of the ground plate 50. Also, as shown in FIGS. 1 and 3C, it is needless to say that such assembling is performed before assembling the housing 11, the base 12, the holding frame 13, and the cover plate 14. In the connector 10 assembled in this manner, although not shown in detail, the distal ends of the electrical connection portions 46 of the contacts 40 and 41 may be formed in shapes that engage with the slots 35 provided on the inner surface of the cover plate 14. preferable.

In such a connector 10, the signal contact 40 and the ground contact 41 in the housing 11 are connected to the opening 16 of the housing 11.
Then, the pin (tab) signal contact and the ground contact of the connector on the external circuit side come into contact with each other, and the cable 60 and the external circuit are electrically connected via these connectors.

5A to 5C, the electric wire connection portion of the ground plate 50
Another embodiment of the electrical connection between 52 and the ground wire 60b is shown. In this embodiment, one end portion 70 of the ground plate 50 is partially cut to form a crimping piece 71 as an electric wire connection portion, and this is folded back to crimp the ground electric wire 60b to collectively connect the ground electric wires 60b. And electrically connected to the ground plate 50. Other configurations are the same as those of the embodiment shown in FIGS. 3A to 3C.

6A to 6C, the wire connection portion of the ground plate 50
14 shows another alternative embodiment of the electrical connection between 52 and the ground wire 60b. In this embodiment, one end portion 80 of the ground plate 50 is partially cut to form a crimp (or press-contact) piece 81 as an electric wire connection portion.
Is formed, and the grounding wire 60b is inserted into the hole formed by this and crimped with the crimping piece 81 to electrically connect the grounding wires 60b to the grounding plate 50 collectively. In this case, since the elasticity of the crimping piece 81 can also be used, it can be said that it is a crimping type. Other configurations are the same as those in FIGS. 3A to 3C.

3A to 3C, FIGS. 5A to 5C, and
6A to 6C, the signal wire 60a
Relatively large cable 60 (e.g., the pitch of 2.54 mm) pitch L ₁ of said for the case of electrical connection to the connector 10. However, when a cable 60 having a relatively small pitch of the signal wires 60a (for example, 1.27 mm whose pitch is one half of the pitch) is electrically connected to the connector 10, the above-described ground contact 41 is required. The area of the through hole 56 through which the electric wire connection part 46 is inserted is used as the area of the through hole through which the electric wire connection part 46 of the signal contact 40 is inserted. Of course, in this case,
It is processed so as to be suitable as a through hole of the electric wire connection portion 46 of the signal contact 40, in other words, so that the electric wire connection portion does not contact the periphery of the through hole and electrically connect to the ground plate 50. .

In such a case, the embodiment will be further described with reference to FIG. In the following, different reference numerals are used for the ground plate, the through hole, and the like. In the cable 60 of this embodiment, the pitch L ₂ (1.27 mm) of the signal wires 60 a is _{one half} of the pitch L ₁ (2.54 mm) of the cable 60 in the above-described embodiment, and The through holes 93 and 94 through which the electric wire connection portions 46 of the signal contacts 40 are inserted are arranged in a staggered manner. The portion of the through hole 94 corresponds to the portion where the wire connection portion 46 of the ground contact 41 is located. Since the through holes 93 and 94 are for the electric wire connecting portion 46 of the signal contact 40, the through holes 93 and 94 have a size such that the electric wire connecting portion does not contact the periphery of the through hole. On the other hand, in the case of this embodiment, the two ground wires 60b are located between the signal wires 60a.
52) (corresponding to 52), the respective ground wires 60b are collectively electrically connected to the ground plate 90. This ground plate 9
Although the electrical connection between 0 and the external ground circuit is not shown, if necessary, the signal wire 60a at an appropriate position is connected to the ground plate 90. In this case, the signal contact in the through hole 94 at an appropriate position is processed so that it can be used as a ground contact.

As described above, when the two ground wires 60b are press-connected to one slot of the wire connection portion 92, a so-called stiffness acts on the slot, and both side portions of the wire connection portion 92 forming the slot are connected to the slot. Expand outward from the closed end,
As a result, the pressure connection may be uncertain.

Therefore, FIGS. 8 and 9 show the electric wire connection portion 92 which can prevent such a risk. The wire connection portion 92 has elastic pieces 92a on both sides, and is formed in a tapered shape such that the inner edge 91a of the slot 91 approaches the open end from the closed end thereof toward the open end thereof.
The inner edge 91a is designed to be substantially parallel in a state where the two ground wires 60b are press-connected to these slots 91. Therefore, there is no fear as described above.

〔The invention's effect〕

According to the present invention, the pair of grounding plates are arranged back to back, the wire connection portion of the grounding contact or the signal contact is disposed outside through the grounding plate, and the connection of the grounding wire or the signal wire is outside. Therefore, a connector to which a multi-conductor cable including a large number of signal and ground wires is connected is provided with a relatively compact and low profile. That is, according to the present invention, there is provided a connector capable of arranging a plurality of conductors of a multi-conductor cable at a high density while having relatively small dimensions.

In addition, according to the present invention, since an excessive force (intrinsic stress) is not generated in the cable in a state where the cable is connected, the cable connection is not loosened and a contact failure is not caused. Provided is a connector for a multi-conductor cable that can be electrically connected.

[Brief description of the drawings]

FIG. 1 is a partially broken perspective view showing an embodiment of the connector of the present invention. FIG. 2 is an exploded perspective view of a main part of the present invention. FIG. 3A is a perspective view of a main part of the present invention. FIG. 3B is a plan view of a main part of the present invention. FIG. 3C is a sectional view of a main part of the present invention. FIG. 4 is a partially enlarged plan view of a ground plate in a main part of the present invention. FIGS. 5A, 5B, and 5C show another embodiment of the present invention, and correspond to FIGS. 3A, 3B, and 3C, respectively. 6A, 6B and 6C illustrate yet another embodiment of the present invention, wherein FIGS. 3A, 3B and
Figure corresponding to figure 3C. FIG. 7 is a plan view of an arrangement example of signal wires and their contacts when the pitch of the signal wires is extremely small. FIG. 8 is a partial perspective view showing a preferred example of a wire connecting portion of the ground plate in the case of FIGS. 8 and 7. FIG. 9 is a view showing an enlarged side view of an electric wire connection part in FIG. 8 and a relation between electric wires. 10 Connector 40 Signal contact 41 Ground contact 46 Wire connection part 50 Ground plate 52 Ground wire connection part 55 Through hole (through hole for signal contact) 56 Through hole (through hole for ground contact) 60 …… Cable 60a …… Signal wire 60b …… Ground wire

Claims (2)

(57) [Claims] 1. A multi-conductor cable having a ground plate for collectively press-connecting said ground wires of a flat cable in which signal wires and ground wires are arranged at a predetermined pitch, and a contact having a wire connection portion. In the electrical connector, the ground plate is formed by bending a plate surface along a connector fitting direction and a cable disposition direction substantially parallel to the connector fitting direction, and at a right angle from the plate surface at an end opposite to the fitting surface. A pair of the ground wire contact portions are arranged back-to-back with the ground wire contact portions facing outward, and the wire connection portions of the contacts penetrate outward in the respective plate surfaces of the pair. And a contact hole for press-fitting the grounding contact, and the connection between the grounding plate and the contactor and the grounding wire is performed outside the plate surface. connector. 2. A multi-conductor cable having a ground plate for press-connecting said ground wires of a flat cable in which signal wires and ground wires are arranged at a predetermined pitch and a contact having a wire connection portion. In the electrical connector, the ground plate is formed by bending a plate surface along a connector fitting direction and a cable disposition direction substantially parallel to the connector fitting direction, and at a right angle from the plate surface at an end opposite to the fitting surface. A pair is arranged back to back with the grounding wire contact portion facing outward, and the wire connecting portion of the contactor is disposed in the plate surface of each of the pair so as not to face outward. It has a through hole for a signal contact which is disposed in contact therewith, and connection of the ground wire and the contact to the ground wire and the signal wire is performed on the outside of the plate surface. Multi-conductor Electrical connector for cable.