JP3325214B2 - Method of manufacturing electrical connector for EMI countermeasures - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to an electrical connector
Relates to a method of manufacturing, and more particularly, to a method for efficiently producing an electrical connector having a large protective effect against electromagnetic interference.

[0002]

2. Description of the Related Art In recent years,
2. Description of the Related Art With the development of various electric and electronic devices, the need for an electrical connector having an electromagnetic wave blocking structure against electromagnetic interference due to high frequency noise generated from these devices has been increasing. FIG. 2 shows an example of the main components of a conventional EMI countermeasure electrical connector having such an electromagnetic wave blocking structure. In FIG. 2, the case of a D sub-connector used for connecting a personal computer and peripheral devices will be described as an example. FIG. 2A is an overall configuration diagram as viewed from the side, and FIG. 2B is an overall configuration diagram as viewed from above. As shown in FIG. 2, the D sub-connector for EMI countermeasure is a resin connector main body 5 in which a plurality of metal terminals 8a and 8b are implanted in predetermined terminal insertion holes 10a and 10b of an insulator.
And a metal shell 6 mounted on the resin connector main body 5 with a sleeve 6b having a height covering the contact area 11 of the metal terminals 8a and 8b, and a circuit board for completely blocking electromagnetic noise. The metal shell 6 through a ground terminal 9 for lowering the ground potential to a ground potential, and a screw hole 9 a formed in the ground terminal 9.
And a fastening bolt 7 for fixing the fixing bolt 7. Next, an outline of a method of manufacturing the electrical connector for EMI suppression will be described. The metal shell 6 is formed by punching, drawing, and bending a metal sheet material by a press working device. A sleeve 6b surrounding the front end (contact area 11) of the resin connector main body 5 is provided in front of the metal shell 6, and thereafter. On the other hand, a through hole 6 for fixing to the resin connector body 5
a. The resin connector body 5 is integrally formed of an insulating synthetic resin by an injection molding device.
The inside thereof is provided with a plurality of metal terminal holding holes 10a, 10b for holding the metal terminals 8a, 8b. Further, at both ends of the resin connector main body 5, through holes 12 for coupling and fixing to the metal shell 6 are provided.

[0003] Metal terminals 8a and 8b and ground terminal 9
Is formed by punching and bending a metal conductive sheet material by a press working device. Further, the ground terminal 9 is subjected to tapping at an end thereof to form a screw hole 9a. As described above, the components of the EMI suppression electrical connector are separately processed in a separate process and are prepared for an assembly process. In the assembling process, the metal terminals 8a and 8b and the ground terminal 9 are mounted in the metal terminal holding holes 10a and 10b provided in the resin connector main body 5 and predetermined positions by a press-fitting device. Further, the sleeve 6 b of the metal shell 6 is fitted to the resin connector body 5 so as to surround the contact area 11 of the resin connector body 5, and is fixed to the screw hole 9 a of the ground terminal 9 by the fastening bolt 7.
The EMI countermeasure electrical connector that has been assembled in this manner is finally inserted into a through hole formed at a predetermined position on a circuit board (not shown) by an electric / electronic device set manufacturer. The tip portions of the metal terminals 8a and 8b of the countermeasure electrical connector and the ground terminal 9 (FIG. 2)
(b), and is fixed to the circuit board by soldering. However, in the conventional EMI countermeasure electrical connector as described above, the number of parts is large, and the number of assembly steps at the manufacturing site is inevitably increased, so that it is not expected to improve productivity and thereby reduce manufacturing costs. There was a problem.

[0004]

Means for Solving the Problems Accordingly, the present inventors have:
In view of these circumstances, the results of extensive studies to improve the manufacturing costs caused thereby productivity of the electrical connector for EMI countermeasure, a part of the gold Shokushi E le end at the stage of the step of pressing the metal shell Then, when forming a joint to a ground potential provided on a circuit board and forming a resin connector main body, the metal shell is inserted into a desired product mold and injection-molded using an insulating synthetic resin. That especially
At that time, it has been found that the use of the specific means reduces the number of components of the electrical connector for EMI countermeasures, and that it is possible to substantially improve the productivity and thereby reduce the manufacturing cost. That is, the present invention includes a metal terminal mounted on a circuit board and held in an insulating housing, and a metal shell covering an outer peripheral portion of the housing.
In the electrical connector for MI, the metal shell is formed by punching a conductive metal plate, drawing, and bending.
At the stage of the so-called pressing process, a joining portion to the ground potential provided on the circuit board is formed at a part of the end of the metal shell, and when forming the insulating housing portion, the metal is put into a desired product mold. When inserting the shell and performing injection molding using insulating synthetic resin , press processing
Along with the injection molding process of insulating synthetic resin,
The hoop-shaped metal shell fed from the
It is possible to perform press molding by inserting and continuing injection molding.
Continuous integration of construction process and injection molding process of insulating synthetic resin
A manufacturing method of an electrical connector for EMI countermeasures, which comprises, Ki reliably out to obtain an EMI countermeasure capable electrical connector with a small number of components according to the present invention,且
The manufacture of electrical connectors for EMI protection more easily and effectively
Can be done efficiently. Further, the connector body is made of an insulating synthetic resin for the purpose of avoiding a conduction failure between adjacent metal terminals implanted therein. Terephthalate resin, polyphenylene sulfide resin, liquid crystalline polyester resin, polyamide resin, polycarbonate resin,
An insulating synthetic resin containing as a main component at least one resin selected from the group consisting of polyphenylene ether resin, cyclic polyolefin resin, and syndiotactic polystyrene resin is preferably used.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 shows an essential part of a configuration of an electrical connector for EMI measures according to an embodiment of the present invention. FIG. 1A is a schematic view of the configuration as viewed from the side, and FIG. 1B is a schematic view of the configuration as viewed from above. As shown in FIG. 1, the electrical connector for EMI countermeasures of the present invention includes a resin connector main body 1 in which a plurality of metal terminals 4a and 4b are implanted in predetermined terminal insertion holes 3a and 3b of an insulator. A sleeve 2b having a height covering the contact areas 3c of the contact portions 4a and 4b;
a) a metal shell 2 provided with a. The joint 2a is finally joined to a ground potential provided on a circuit board (not shown).

Next, an outline of a method of manufacturing the electrical connector for EMI suppression according to the present invention will be described. Metal shell 2
Is formed by punching, drawing and bending a metal sheet material by a press working device. A sleeve 2b surrounding the front end (contact area 3c) of the resin connector main body 1 is provided in front of the metal sheet material. A joint 2a for finally joining to the ground potential provided on the circuit board is formed in the portion. The resin connector main body 1 is formed integrally with the metal shell 2 by an injection molding device using an insulating synthetic resin after the metal shell 2 is inserted into a product mold. A plurality of metal terminal holding holes 3a and 3b for holding 4b are provided. In addition, in the present invention, after the metal shell 2 having a specific shape is inserted into a product mold, other than molding integrally with the metal shell 2 by an injection molding device with an insulating synthetic resin, Although there is no restriction on the processing method, the press process is added to the injection molding process of insulating synthetic resin, and the hoop-shaped metal shell fed from the press process is inserted and the injection molding is continued. By doing so, the pressing process and the injection molding process of the insulating synthetic resin are continuously integrated, and the production efficiency can be further improved.

The metal terminals 4a and 4b are formed by punching and bending a metal conductive sheet material by a press working device. The metal terminals 4a and 4b thus processed are
Metal terminal holding hole 3 provided in resin connector body 1
a, 3b are mounted by a press-fitting device. Although not specifically illustrated by the examples, the metal terminals 4a and 4b are pressed into a hoop shape and inserted into a product die together with the metal shell 2, and then the metal terminals 4a and 4b are formed of an insulating synthetic resin by an injection molding device. It is also possible to integrally mold the shell 2 and the metal terminals 4a and 4b, whereby the step of press-fitting the metal terminals as in the above embodiment can be omitted.

The EMI countermeasure electrical connector assembled as described above is inserted into a through hole formed at a predetermined position on a circuit board (not shown), and the metal terminals 4a and 4b of the EMI countermeasure electrical connector and the joint are formed. The tip of the portion 2a (the lower portion in FIG. 1A) is inserted and finally fixed to the circuit board by soldering.

[0009]

According to the method of the present invention, as compared with the conventional method, the number of parts is reduced, and the manufacturing process time of the electrical connector for EMI suppression is greatly reduced. In addition, by selecting an insulating synthetic resin suitable for the insulating material of the connector body, it is possible to provide a product that facilitates molding processing, has excellent electrical and mechanical properties, and can secure reliability over a long period of time. become.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing a main part of a configuration of an electrical connector for EMI countermeasures according to an embodiment of the present invention, wherein (a) is a main configuration viewed from a side, and (b) is a top view. FIG.

FIGS. 2A and 2B are diagrams showing a main part of a configuration of an electrical connector for EMI suppression according to the related art, wherein FIG. 2A is an overall configuration diagram viewed from a side, and FIG. 2B is an overall configuration diagram viewed from above. It is.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Resin connector main body 2 Metal shell 2a Joint 2b Sleeve 3a Metal terminal holding hole 3b Metal terminal holding hole 4a Metal terminal 4b Metal terminal

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-9-263685 (JP, A) JP-A-9-3279 (JP, A) JP-A-9-199230 (JP, A) JP-A-9-92 77964 (JP, A) JP-A-5-21113 (JP, A) JP-A-63-218173 (JP, A) JP-A-3-82575 (JP, U) JP-A 62-111183 (JP, U) Special Table Hei 10-500245 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01R 13/658 H01R 43/00

Claims (2)

(57) [Claims] 1. An EMI suppression electrical connector including a metal terminal attached to a circuit board and held in an insulating housing and a metal shell covering an outer peripheral portion of the housing, wherein the metal shell is formed by punching a conductive metal plate. At the stage of the so-called pressing process in which drawing and bending are performed, a joining portion to the ground potential provided on the circuit board is formed at a part of the end of the metal shell, and it is desirable to form the insulating housing portion. near the the insert the metal shell product mold, injection molding using an insulating synthetic resin
Or press working process, injection molding process of insulating synthetic resin
And a hood that is fed from the pressing process
Insert a metal shell in the shape of a
Pressing process and injection of insulating synthetic resin
A method for producing an electrical connector for EMI measures , comprising continuously integrating a molding process . 2. The method according to claim 1, wherein the insulating synthetic resin is polybutylene tereph.
Tallate resin, polyphenylene sulfide resin, liquid crystal
Polyester resin, polyamide resin, polycarbonate
Resin, polyphenylene ether resin, cyclic polyolefin
Resin, syndiotactic polystyrene resin
At least one resin selected from the group consisting of
2. The EMI countermeasure electrical connector according to claim 1, wherein
Manufacturing method.