JP2002075544A - Multi-pole shielded electrical connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dispense with a separate shield plate to reduce the number of parts and to omitting assembly work for it to simply an assembly process and to reduce the cost as a whole. SOLUTION: In a multipolar shield electric connector is provided with a case and a plurality of terminal blocks built in respective sections of the case, and each of the terminal blocks is provided with an insulating block holding a contact group, while a shield coating film is applied to at least one side face of the insulating block.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-pole shielded electrical connector, and more particularly, to a shielded electrical connector between adjacent contacts.

[0002]

2. Description of the Related Art Hitherto, a multi-pole electrical connector for connecting a printed circuit board and a printed circuit board in a state of being parallel to each other or in a state of being orthogonal to each other has been known. In the future, these multi-pole electrical connectors will often be used for connection between circuits that transmit extremely high-frequency electrical signals, and in such cases, suppress signal lag and signal reflection. Therefore, it is necessary to match impedance and shield between adjacent contacts in order to prevent crosstalk between contacts.

[0003] As a multi-pole shielded electrical connector of the type in which adjacent contacts are shielded, for example, there is one disclosed in Japanese Patent Application Laid-Open No. 6-325829. This conventional multi-pole shielded electrical connector includes a housing module having a large number of insertion sections, and a contact module formed by integrally forming a contact group with an insulating web is attached to each insertion section of the housing module from the back. It is assembled by inserting one by one. A shield plate is attached and fixed to the side surface of the insulating web of each contact module. Therefore, the shield plate is interposed between the contact group integrally formed with the adjacent contact module inserted and fixed in the insertion section of the housing module,
Due to the presence of the shield plate, crosstalk between contacts can be prevented.

[0004]

However, the structure of such a conventional multipole shielded electrical connector has the following problems. First, since a separately formed shield plate is incorporated into an insulating web, the number of parts is so large, and the assembling work is required. Therefore, the assembling work is troublesome and the price is increased accordingly. Also,
Since the electrical connection between the shield plate and the grounding contact in the insulating web is made by the contact piece formed on the shield plate, the contact force is likely to vary due to the assembly, and the stability is lacking. Furthermore, since a separately formed shield plate is attached to the insulating web, it is difficult to apply a shield to the entire surface of the insulating web. In addition, since the position of the contact piece of the shield plate formed separately in advance determines which of the contacts in the insulating web is to be the grounding contact, the position of the grounding contact is determined according to the purpose. It has not been easy to respond to the need to change.

[0005] It is an object of the present invention to provide a multi-pole shielded electrical connector which can solve the problems of the prior art as described above.

[0006]

According to the present invention, there is provided a multi-pole shielded electrical connector including a case having a plurality of sections, and a plurality of terminal blocks assembled to each of the sections of the case. Each of the terminal blocks has an insulating block for holding a contact group, and at least one side surface of the insulating block is provided with a shield coating. Provided.

According to one embodiment of the present invention, the multi-pole shielded electrical connector is further mounted on the case and an insulating block of a plurality of terminal blocks mounted on the case, and An enclosing ground plate is provided to cover most of the upper surface of the case and the upper and rear surfaces of the insulating block.

According to another embodiment of the present invention, the insulating block of each terminal block is formed integrally with a contact group to be held by the terminal block, and is used as a ground contact in the contact group. Electrical connection between the contact and the shield coating is made through an extension of the shield coating formed through a hole formed in the insulating block.

According to another embodiment of the present invention, the insulating block of each of the terminal blocks is constituted by a first insulating half block and a second insulating half block, which are formed in advance by dividing into two. The contact group of each terminal block is held and fixed by combining the first insulating half block and the second insulating half block with the contact group interposed therebetween, and is used as a ground contact of the contact group. The contact is provided with a contact piece, and the electrical connection between the ground contact and the shield coating is performed by the contact piece contacting a part of the shield coating.

According to yet another embodiment of the present invention,
The shield coating is provided by resin plating on the surface of the insulating block.

According to yet another embodiment of the present invention,
The shield coating is provided on the upper surface and both side surfaces of the insulating block.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described in more detail with reference to the accompanying drawings according to embodiments and examples of the present invention.

FIG. 1 is a front view of a multi-pole shielded electrical connector as one embodiment of the present invention, FIG. 2 is a side view thereof, FIG. 3 is a plan view thereof, and FIG. , And FIG. 5 is a rear view thereof. FIG.
FIG. 2 is an enlarged sectional view taken along line AA of FIG. 1. As shown in these figures, the multi-pole shielded electrical connector of this embodiment includes a case 10 having a large number of sections,
Terminal Blocks 20 Assembled in Each of the Compartment Sections
And a surrounding ground plate 30 that is assembled to the case 10 and a large number of terminal blocks 20.

The case 10 is integrally formed of, for example, a plastic material, and as shown in FIGS. 1 and 6, the contact of the contact with the mating connector (not shown) is provided. Contact part storage part 1 for storing parts
One. On the front surface of the contact portion storage portion 11, an opening 11A for receiving, for example, a contact portion of a contact of five mating connectors is formed vertically in each section. As shown in FIG. 6, the case 10 is formed with partition sections 12 extending rearward from above and below the rear end of the contact section storage section 11 and defining a large number of partitions. On the upper and lower inner wall surfaces of the partition portion 12, regulating protrusions for regulating partitions aligned with the five vertical openings 11A of the contact portion storage portion 11 are formed. As shown in FIGS. 1, 2, 3, 4 and 6, the case 10 is provided with a fitting guide post 13 for guiding the fitting with the mating connector. I have. Furthermore, case 10
As shown in FIGS. 2, 4 and 6, positioning support posts for positioning and supporting the multi-pole shielded electrical connector when mounted on a printed circuit board (not shown). 14 are also formed. The case may be made of a metal material.

Next, the detailed structure of the terminal block 20 will be described. FIG. 7 shows a large number (22 in this embodiment).
) Is taken out and shown in an enlarged perspective view. As is well shown in FIG.
The terminal block 20 has five contacts 21, 22, 2
3, 24 and 25, and an insulating block 26.
In this embodiment, the insulating block 26 is made of a synthetic resin material such as plastic, and the contacts 21, 22, and 2.
3, 24 and 25 are integrally formed so as to be held and fixed at predetermined intervals. In molding such an insulating block 26, five contacts 21, 22, 23, 24 and 25 are arranged at predetermined positions with respect to a molding die of the insulating block 26, and contact portions 21A, 22A,
23A, 24A and 25A protrude from the front end face of the insulating block 26, and the connecting portions 21C, 22 of the respective contacts.
C, 23C, 24C and 25C are projected from the lower surface of the insulating block 26. As shown in FIG.
Recess 26 formed on the side surface of insulating block 26 after molding
A indicates an insulating block 26 and five contacts 21 to 25
It is formed because a holding jig for holding the five contacts 21 to 25 at a predetermined position has been inserted at the time of integral molding with the above. Therefore, as shown in FIG. 6, a part of the intermediate portion 21B, 22B, 23B, 24B and 25B of each contact is exposed on the bottom surface of the recess 26A.

After integrally forming the insulating block 26 in this way, according to the present invention, a shield coating 27 made of resin plating is applied so as to cover both side surfaces and most of the upper surface of the insulating block 26. The shield film 27 only needs to cover at least one side surface, and it is sufficient that most of the shield film 27 is covered when the insulating block 26 is assembled to the case 10. When performing this resin plating, the intermediate portions 21B, 22B, 23B, 24B and 25 of the contacts exposed on the bottom surface of the recess 26A of the insulating block 26 are formed.
In order to prevent a problem such as a short circuit due to plating on the portion B, it is necessary to mask the portion of the recess 26A. The resin plating may be, for example, such that nickel plating is performed on a copper base.

In this embodiment, as shown in FIG. 7, a mold is formed such that a hole 26B is formed at a position where it comes into contact with the middle portion 23B of the center contact 23 among the five contacts. A part of the intermediate portion 23B of the contact 23 is exposed at the bottom of the hole 26B, and the shield film 27 is electrically connected to the intermediate portion 23B of the contact 23 when the shield film 27 is formed by the above-described resin plating. I am trying to be. In this case, the contact 23 is used as a ground contact. However, the present invention is not limited to this, and any contact can be used as a ground contact, which can be easily performed only by changing the position of the hole 26B formed in the insulating block 26. Can understand. In addition, for all contacts, a plurality of holes are formed in the insulating block in advance so as to hit a part of the contact, and the resin contacts a contact to be used as a ground contact during resin plating for forming a shield coating. Holes other than the holes may be masked. Furthermore, such a hole may be formed at a desired position after the formation of the shield coating, and the electrical connection between the shield coating and the ground contact may be provided by other means.

The terminal block 20 as shown in the perspective view of FIG. 7 is formed from the rear end of the case 10 as described above, with the contact storage portions 11 corresponding to the contact portions 21A to 25A of the contacts 21 to 25 respectively. The front end of the insulating block 26 is housed at a position facing each opening 11A and the case 1
It is assembled to the case 10 so as to be inserted between the corresponding adjacent regulating ridges of the 0 partition 12 and fixedly held therein. In this embodiment, 22 terminal blocks 20 are assembled to the case 10. FIG.
FIG. 9 is an enlarged side view showing only a plurality of terminal blocks 20 (the case 10 is omitted) in a state assembled to the case 10 in this manner, and FIG. It is a line partial sectional view. As can be seen from FIGS. 8 and 9, when assembled to the case 10, the contacts 21 to 2 of the adjacent terminal block 20
5 are separated from each other by a shield coating 27 applied to the side surface of the insulating block 26 of each terminal block 20 and are shielded from each other. The middle portion 23B of the center ground contact 23 among the contacts of each terminal block 20 has a shield coating 27 formed so as to enter from the peripheral wall to the bottom surface of the hole 26B formed on both side surfaces of the insulating block 26. It can be seen that it is electrically connected to the shield coating 27 via the portion 27A. In the present invention, the embodiment in which the shield film 27 is formed by resin plating has been described. However, the shield film may be formed by spraying, painting, vapor deposition, or other methods. In addition, although a concave portion 26B for preventing distortion during molding is formed on the side surface of the insulating block 26, a shield coating can be applied to the concave portion 26B.

FIG. 10 shows a terminal block 2 for easy understanding of the shapes and arrangement of the contacts 21 to 25 fixed and held integrally with each terminal block 20 by molding.
FIG. 4 is a side view showing a state where an insulating block 26 of No. 0 is removed. As shown in FIG. 10, the contact 21 includes a contact portion 21A, an intermediate portion 21B, and a connection portion 2A.
1C. Similarly, the contact 22
The contact 23 includes a contact portion 22A, an intermediate portion 22B, and a connection portion 22C.
The contact 24 includes a contact portion 24A, an intermediate portion 24B, and a connection portion 24C, and the contact 25 includes a contact portion 25A, an intermediate portion 25B, and a connection portion 25C. ing. These contacts may be formed by stamping from a conductive material sheet having spring properties. In this embodiment, the contact portion of each contact is of a female type, but the present invention is not limited to this and may be of a male type.

Next, the structure and operation of the surrounding ground plate 30 will be described. In the surrounding ground plate 30, a plurality of terminal blocks 20 are assembled to the case 10 as shown in FIGS. In this state, the upper surface of the case 10 and the upper surface and the rear surface of the terminal block 20 are entirely covered with the case 10 and the terminal block 20. The surrounding ground plate 30 may be formed by punching and bending a conductive material sheet having spring properties. As shown in FIG. 6, the surrounding ground plate 30 includes a locking protrusion 31 inserted into each of a plurality of locking grooves 15 formed at the front end of the top surface of the case 10 and locked, and a mating connector. An elastic contact piece 32 for making electrical contact with a ground contact or the like and a groove 26C formed on the top surface of the insulating block 26 of each corresponding terminal block 20 are formed on the surface of the groove 26C. A locking contact piece 33 that is in electrical contact with the shield coating 27;
A projection 34 that enters into and engages with a concave groove 26D formed on the back surface of the insulating block 26 of each corresponding terminal block 20, and a case where this multi-pole shielded electrical connector is mounted on a printed circuit board. A connection protrusion 35 is provided for electrically connecting to the ground conductor of the printed circuit board. Thus, the surrounding ground plate 30
Can act as the overall outer shield of this multi-pole shielded electrical connector.

FIG. 11 is a view similar to FIG. 8 showing a terminal block as another embodiment of the present invention, and FIG. 12 is a partial cross-sectional view taken along line AA of FIG. Since the configuration of this terminal block is substantially the same as the configuration of the terminal block described above, the same components will be denoted by the same reference numerals, and only different configurations will be described below.

The terminal block 20A of this embodiment is different from the above-described terminal block 20 in that it is an insulating block 26 in which contacts are integrally formed. The portions 21B to 25B are fixedly held by being sandwiched between the split blocks. As is well shown in the cross-sectional view of FIG.
The insulating block 26 'in the first embodiment is a first insulating half block 2 molded from an insulating resin material such as plastic.
6'A and a second insulating half block 26'B. On the inner surface of the first insulating half block 26'A, intermediate portions 21B to 25B of contacts 21 to 25 to be clamped are provided.
Is formed with a concave portion R in which a part of each can be fitted, and a cutout portion C at a lower end portion. Similarly, a concave portion R is formed on the inner surface of the second insulating half block 26'B so that a part of each of the intermediate portions 21B to 25B of the contacts 21 to 25 to be clamped can fit therein. A shield coating 27 similar to the shield coating applied to the insulating block 26 of the terminal block 20 described above is applied to the upper surface and the outer surface of the first insulating half block 26'A. It is provided to have a coating portion 27B extending above the inner wall surface of the notch C. Similarly, a similar shield coating 27 is applied to the upper surface and the outer surface of the second insulating half block 26'B.

FIG. 13 is a side view similar to FIG. 10 showing a contact group used in the terminal block 20A of the embodiment of FIGS. 11 and 12, and FIG. 14 is a plan view of the contact group of FIG. 15, FIG.
It is a line sectional view. Since these contacts have the same structure as the above-mentioned contact except for the middle contact, the same components are denoted by the same reference numerals, and only different portions will be described below. As well shown in FIGS. 13 and 15, the contact groups 21 to 2
5 is used as a ground contact, and a contact piece 2 'is provided at the intermediate portion 23'B.
Has 3D.

As best shown in FIG. 12, the first insulating half block 2 is held so as to sandwich the intermediate portion of the contact group.
When the 6'A and the second insulating half block 26'B are combined, the contact 2 acting as a ground contact
The contact piece 23D formed in the intermediate portion 23 'of 3' is pressed into contact with the shield coating portion 27B provided on the inner wall surface of the cutout portion C of the first insulating half block 26'A. As a result, the ground contact 23 'and the shield film 27 are formed.
Electrical connection is made.

[0025]

According to the present invention, the shield between the adjacent contacts is provided by the shield coating applied to the surface of the terminal block holding each contact, so that a separate shield plate is not required, the number of parts is reduced, and the assembling work for that is required. This also simplifies the assembly process and provides an inexpensive multi-pole shielded electrical connector as a whole.

Since a shield plate is not incorporated, variations in assembly dimensions can be reduced, and variations in shield characteristics for each terminal block can be reduced.

Since the shield is provided by a shield coating made of resin plating, it is easy to shield the entire surface, and it is possible to provide a shield at an arbitrary position on the upper surface, lower surface, or the like of the terminal block.

In the case of a terminal block of a type in which an insulating block is integrally formed with a contact group, the electrical connection between the grounding contact and the shield coating is performed by plating provided in the same step as the plating step of providing the shield coating. Since it can be performed with a coating, a special contact piece or the like can be eliminated, and it can be made simple and inexpensive. In addition, the electrical connection by such a plating film is more stable than the electrical connection by mechanical contact with a contact piece or the like, so that the reliability can be improved.

Furthermore, when a terminal block of a type in which an insulating block is integrally formed with a contact group is used, the position of a hole formed in the insulating block is changed or another hole is added, so that the contact group is formed. Can be used as grounding contacts, so that a flexible electrical connector can be provided.

[Brief description of the drawings]

FIG. 1 is a front view of a multi-pole shielded electrical connector as one embodiment of the present invention.

FIG. 2 is a side view of the electrical connector of FIG.

FIG. 3 is a plan view of the electrical connector of FIG. 1;

FIG. 4 is a bottom view of the electrical connector of FIG. 1;

FIG. 5 is a rear view of the electrical connector of FIG. 1;

FIG. 6 is an enlarged sectional view taken along line AA of FIG. 1;

FIG. 7 is an enlarged perspective view showing one of a plurality of terminal blocks constituting the multi-pole shielded electrical connector of FIG. 1;

FIG. 8 is an enlarged side view showing only a plurality of terminal blocks 20 assembled to the case in the electrical connector of FIG. 1;

FIG. 9 is a partial sectional view taken along line AA of FIG. 8;

10 is a side view showing a shape and an arrangement state of a group of contacts fixed and held to each terminal block by integral molding in the electrical connector of FIG. 1;

FIG. 11 is a view similar to FIG. 8, showing a terminal block as another embodiment of the present invention.

FIG. 12 is a partial sectional view taken along line AA of FIG. 11;

FIG. 13 is a side view similar to FIG. 10 showing a contact group used in the terminal block of the embodiment of FIG. 11;

FIG. 14 is a plan view of the contact group of FIG.

FIG. 15 is a sectional view taken along line AA of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Case 11 Contact part storage part 11A Opening 12 Division part 20 Terminal block 21 Contact 22 Contact 23 Contact 24 Contact 25 Contact 26 Insulation block 26B Hole 27 Shield coating 27A Shield coating part 30 Surrounding ground plate

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5E021 FA05 FA11 FB01 FC20 FC23 FC32 LA09 LA12 LA15 LA20 5E023 AA04 AA16 BB02 BB11 BB22 CC22 EE08 GG02 HH12 HH15 HH17 5E321 AA23 GG01 GG07

Claims (6)

[Claims] 1. A multi-pole shielded electrical connector comprising: a case having a plurality of compartments; and a plurality of terminal blocks assembled to each of the compartments of the case, wherein each of the terminal blocks includes a contact group. A multi-pole shielded electrical connector, comprising: an insulating block to be held; and a shield coating is applied to at least one side surface of the insulating block. 2. An enclosure assembled to the insulating block of the case and a plurality of terminal blocks assembled to the case so as to cover at least an upper surface of the case and most of an upper surface and a rear surface of the insulating block. The multi-pole shielded electrical connector according to claim 1, further comprising a ground plate. 3. The insulating block of each of the terminal blocks,
It is integrally molded with the contact group to be held,
An electrical connection between the contact used as a ground contact in the contact group and the shield coating is made through an extension of the shield coating formed through a hole formed in the insulating block. Item 3. The multi-pole shielded electrical connector according to item 1 or 2. 4. The insulating block of each of the terminal blocks,
A first insulating half-block, which is pre-formed in two pieces, and a second
The contact group of each terminal block is held and fixed by combining the first insulating half block and the second insulating half block with the contact group interposed therebetween. The contacts used as ground contacts in the group include:
The contact piece is provided, and the electrical connection between the ground contact and the shield coating is performed by the contact piece contacting a part of the shield coating.
Or a multi-pole shielded electrical connector according to item 2. 5. The multi-pole shielded electrical connector according to claim 1, wherein said shield coating is provided by resin plating on a surface of said insulating block. 6. The multi-pole shielded electrical connector according to claim 1, wherein the shield coating is provided on an upper surface and both side surfaces of the insulating block.