JP2003257566A - Electric connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric connector with reduced the cost without solder and flux creeping up. <P>SOLUTION: The electric connector is composed of an insulation housing 40 and a number of terminals 20. The terminal 20 is provided with a flat-plate substrate part 21, a contact pair 24 made of a continuous piece 23 folded back from the substrate part 21 at one side face of the substrate part 21, and a carrier coupling piece 30 bent at around right angles from the substrate part 21 at the other side face of the substrate part 21. The insulation housing 40 is overmolded around the substrate part 21 of the terminal 20, holding it formed in a flat-plate shape, the contact pair 24 of the terminal 20 is extended toward one face 40A of the insulation housing 40, and the carrier coupling piece 30 is extended toward the other face 40B of the insulation housing 40. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric connector suitable for mounting and mounting on a circuit board.

[0002]

2. Description of the Related Art Conventionally, an electric connector of this type has an insulating housing and a large number of terminals. 6,
FIG. 7 shows an example of a conventional electric connector.
A large number of the terminals 100 are mounted by press fitting into the insulating housing 200 shown in FIG. 7 to complete the electrical connector 300. In the figure, one terminal 100
Only a large number of terminals 100 are shown
Are mounted in parallel at a predetermined pitch. In the case of the terminal 100 of FIG. 6, the press-fitting portion 102 is continuous with the base of the contact pair in which the pair of contact pieces 101 are opposed to each other, and the solder ball fusion portion 103 is continuous with the press-fitting portion 102. It is constructed by punching out from a thin metal plate.

Such a terminal 100 is press-fitted into a terminal receiving cavity (not shown) provided through the insulating housing 200, and the press-fitting portion 102 is locked to the inner wall of the terminal receiving cavity, whereby the terminal 10
0 is held in the insulating housing 200. A solder ball 104 is fused to the solder ball fusion portion 103 of each terminal 100, and a part of the opposite side of the fusion portion is projected from the insulating housing 200 to the outside.

Reference numeral 400 shown in FIG. 7 denotes a mating electrical connector, in which a plurality of contact pins 500 provided on the electrical connector 300 side and corresponding to the contact pairs of the terminals 100 are held in an insulating housing 600. . Electrical connector 300 and counterpart electrical connector 400
And constitute an electrical connector device. Each electrical connector 3
By mounting and mounting 00 and 400 on the circuit boards, respectively, the circuit boards can be connected to each other through the electrical connectors 300 and 400.

In the structure for holding the terminal in the insulating housing, the terminal mounting groove is provided outside the terminal receiving cavity so as to penetrate the insulating housing, and the side edges of the terminal are locked to the inner walls of the terminal mounting groove facing each other. The structure is also known (for example, JP-A-11-14882).
No. 1).

[0006]

Since the conventional electric connector having the above-mentioned structure has a structure in which the terminal is press-fitted into the terminal receiving cavity or the mounting groove of the insulating housing, a great number of man-hours are required for mounting the terminal. However, there is a problem that the manufacturing cost increases. The number of terminals is increasing and the density is increasing, and terminals with 100 or more terminals arranged in high density are also manufactured, and it is essential to solve this problem. In addition, the structure in which the terminal is press-fitted into the terminal receiving cavity or the mounting groove that penetrates the insulating housing is such that when the electrical connector is mounted on the circuit board and soldered, it passes through the gap between the terminal receiving cavity and the mounting groove and the terminal. There is also a problem that soldering up or fluxing up may occur and contaminate the engaging portion with the terminal of the counterpart electrical connector such as a contact pair.

The present invention has been made in view of such problems, and an object thereof is to reduce the manufacturing cost and to provide an electric connector having a structure in which solder rise and flux rise are eliminated.

[0008]

The invention according to claim 1 of the present invention made based on the above object, is a circuit board mounting comprising an insulating housing and a plurality of terminals arranged in parallel at a predetermined pitch. In the electrical connector for use, the terminal comprises a flat plate-shaped board portion, a contact pair formed by a continuous piece folded from the board portion on one side surface side of the board portion, and a board on the other side surface side of the board portion. And a carrier connecting piece bent substantially at a right angle from the above portion, the insulating housing is overmolded around the base plate portion of the terminal, is formed into a substantially flat plate shape, and holds the terminal. A pair of contacts extending toward one surface of the insulating housing, and a carrier connecting piece extending toward the other surface of the insulating housing. That.

A second aspect of the present invention is the electrical connector according to the first aspect, wherein the contact pair provided in the terminal is housed in a recess formed in one surface side of the insulating housing.

According to the third aspect of the present invention, an opening reaching the board portion of the terminal is provided on the other surface side of the insulating housing, and the opening is fused to the board portion through the opening portion to the outside of the other surface of the insulating housing. The electrical connector according to claim 1 or 2, wherein a protruding solder ball is provided.

According to a fourth aspect of the present invention, a cutout opening is formed along the bent portion at the bent portion where the base plate portion of the terminal and the carrier connecting piece are continuous, and the resin forming the insulating housing flows into the bent portion. The electrical connector according to any one of 1 to 3.

According to the invention of claim 5, a plurality of contacts are engaged with the electrical connector according to any one of claims 1 to 4 in a one-to-one correspondence with each contact pair of terminals arranged in parallel. The electrical connector device includes a pin and a mating electrical connector that is overmolded with a large number of these contact pins and is formed into a substantially flat plate shape and has an insulating housing that holds the contact pins.

According to a sixth aspect of the present invention, an opening reaching the base of the contact pin is provided on one surface side of the insulating housing of the counterpart electrical connector, and the base of the contact pin is fused through the opening to insulate the insulation. The electrical connector device according to claim 5, further comprising a solder ball protruding outside one surface of the housing.

[0014]

According to the electrical connector of the present invention, the terminal having the board portion, the contact pair, and the carrier connecting piece is overmolded with the insulating housing to hold the terminal. Even an electric connector equipped with a terminal can be manufactured efficiently and easily. Further, since it is possible to eliminate the formation of a gap penetrating the insulating housing, it is possible to eliminate the risk of solder rising or flux rising when soldering to the circuit board.

By housing the contact pair of the terminal in the recessed portion of the insulating housing as in claim 2, the contact pair can be protected by the insulating housing and deformation and contamination can be prevented.

According to a third aspect of the present invention, the ball grid array (BG) is formed by fusing solder balls to the board portion of the terminal and projecting the solder balls from the insulating housing.
It can be an electrical connector of A) structure. However, by providing a pin-shaped solder tail capable of DIP soldering (DIP) or a solder tail capable of surface soldering (SMT) on the carrier connecting piece of the terminal, an electrical connector such as a pin grid array (PGA) structure is provided. It goes without saying that it is good.

When a cutout opening is formed along the bent portion in the bent portion where the base plate portion of the terminal and the carrier connecting piece are continuous, the distance (pitch) between adjacent terminals can be increased. This is suitable for shortening the parallel pitch of terminals.

Further, according to the electric connector device of the fifth aspect, the mating electric connector also has a structure in which the insulating housing is overmolded on a large number of contact pins.
It is possible to provide an electrical connector device that can be manufactured efficiently and easily. Then, it is possible to provide an electrical connector device in which there is no risk of solder rising or flux rising when mounting on a circuit board.

According to the invention of claim 6, the other electrical connector can also be an electrical connector of BGA structure.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows an electric connector device composed of an electric connector 10 and a mating electric connector 50 which can be fitted to each other. The electrical connector 10 includes a large number of terminals 20 arranged in parallel at a predetermined pitch, and an insulating housing 40 overmolded on the terminals 20. Also, the other party's electrical connector 5
Reference numeral 0 is composed of a large number of contact pins 60 arranged in parallel in a one-to-one correspondence with the terminals 20 and an insulating housing 80 overmolded on the contact pins 60. Although the terminals 20 and the contact pins 60 are lined up at a predetermined pitch in the left-right direction in FIG. 1, they are also lined up at a predetermined pitch in the direction perpendicular to the plane of the drawing.

Terminal 2 which constitutes the electrical connector 10
No. 0 is formed by punching out a thin metal plate into a shape as shown in FIG. That is, a continuous piece 23 having a width slightly smaller than that of the substrate portion 21 is folded back from one side edge 22 of the substrate portion 21 to one side surface (upper side surface) side of the rectangular and flat plate-shaped substrate portion 21. The formed contact pair 24 is erected. The contact pair 24 includes a contact piece 25 and another contact piece 26. The width of the contact piece 25 is slightly wider than the width of the contact piece 26. The contact pieces 25 and 26 are formed by forming a separation groove 27 along the longitudinal direction of the continuous piece 23 and bending both sides of the separation groove 27 at substantially right angles. A base piece 27 continuous to the base of each contact piece 25, 26 at a substantially right angle,
28 have different lengths, and the contact piece 2
The contact pin 60 can be received and engaged between points 5 and 26. The tip portions of the contact pieces 25 and 26 have contact portions 25 each curved in an arc shape.
When a and 26a are formed and engage with the contact pin 60, they are elastically deformed in the directions away from each other.

On the other side surface (lower side surface) of the board portion 21, a carrier connecting piece 30 extends from the other side edge 29 of the board portion 21 in a direction substantially at a right angle. The carrier connecting piece 30 includes the substrate portion 2.
It has the same width as 1. A notch opening 32 is formed along the bent portion 31 in the bent portion 31 of the carrier connecting piece 30 that is continuous and has a substantially right angle.

The insulating housing 40 overmolded on the terminal 20 is formed in a substantially flat plate shape so as to embed the four circumferences of the substrate portion 21, and the contact pair 24 has one surface 40A of the insulating housing 40 (the counterpart electrical connector 50). The carrier connecting piece 30 extends in the direction of the other surface 40B (the surface opposite to the one surface 40A). A recess 41 is formed on the one surface 40A side of the insulating housing 40 so as to correspond to the contact pair 24. The recessed portion 41 has a size and a depth for accommodating the contact pair 24, and is accommodated so that the contact pair 24 does not protrude from the insulating housing 40 to the outside. Further, on the other surface 40B side of the insulating housing 40, the opening portion 4 reaching the board portion 21 in correspondence with the board portion 21 of each terminal 20.
2 is formed. The carrier connecting piece 30 slightly projects from the other surface 40B of the insulating housing 40.
The resin (insulating) forming the insulating housing 40 flows into the cutout opening 32 formed in the bent portion 31 where the substrate portion 21 of the terminal 20 and the carrier connecting piece 30 are continuous.

An opening 42 formed in the insulating housing 40 for each of the terminals 20 held in place by overmolding the insulating housing 40.
Solder balls 33 are provided therethrough. The solder ball 33 is fused to the central portion of the substrate portion 21 exposed in the opening 42, and a part of the solder ball 33 is projected to the outside from the other surface 40B of the insulating housing 40.

3 and 4, the terminal 20 on which the insulating housing 40 is overmolded is still the carrier 34.
The continuous state is shown in FIG. The carrier connecting pieces 30 and the carriers 34 of the plurality of terminals 20 are connected to the cutting portion 3
It is continuous through 5. The insulating housing 40 may be overmolded while the terminal 20 is continuous with the carrier 34 and separated at the position of the cutting portion 35 after overmolding. Alternatively, the terminal 20 may be separated from the carrier 34 before overmolding. The insulating housing 40 may be overmolded by setting it in a predetermined position in a molding die (not shown).

Next, the mating electric connector 50 is formed into a substantially flat plate by overmolding the insulating housing 80 so that the intermediate portion of the contact pin 60 is embedded. The base 61 of the contact pin 60 faces the opening 81 formed on the one surface 80A side of the insulating housing 80. The solder balls 62 are provided through the openings 81. This solder ball 62
Is also fused to the base portion 61 of the contact pin 60 facing the inside of the opening 81, and a part thereof is projected outside from the surface of the insulating housing 80.

FIG. 5 shows the electric connectors 10 and 50 described above.
Terminal 20 and contact pin 60 when mated
And solder balls 33, 62 fused to each
Shows only some.

As described above, since the electric connector 10 is constructed by overmolding the insulating housing 40 on the terminal 20, the step of press-fitting the terminal 20 is eliminated,
The electrical connector 10 provided with a large number of terminals 20 can be manufactured efficiently and easily. Also, Terminal 2
Since the insulating housing 40 was overmolded to 0,
It is possible to prevent a gap from being formed at the boundary surface between the terminal 20 and the insulating housing 40, and to melt the solder ball 33 to the board portion 21 of the terminal 20 or to the connection pad of the circuit board (not shown). It is possible to prevent the solder and flux from rising on the contact pair 24 side at the time of attachment, to keep the contact pair 24 clean and to prevent the performance of electrical connection from being impaired.

The same applies to the other electrical connector 50.
Since the insulating housing 80 is over-molded on the contact pin 60, the step of press-fitting the contact pin 60 can be eliminated, and solder rise and flux rise at the time of fusion bonding of the solder ball 62 can be eliminated.

Contact pair 2 which constitutes the terminal 20
4 is housed in the recessed portion 41 formed in the insulating housing 40 so as not to project to the outside.
Before mating with 0, it is possible to protect the contact pair 24 from contact with hands or other objects. For this reason,
The contact pair 24 can be protected from deformation and contamination.
It is also possible to avoid a situation in which static electricity is discharged to the circuit in the circuit board through the contact pair 24 and damages the circuit components.

When the notch opening 32 is formed in the bent portion 31 where the base plate portion 21 of the terminal 20 and the carrier connecting piece 30 are continuous, one side edge 22 of one terminal 20 is formed.
And the bent portion 31 of the other terminal 20 adjacent to this
This is effective in preventing a short circuit between the other side edges 29 in which is formed, and the distance (pitch) between the adjacent terminals 20 can be made as small as possible. This is effective for downsizing the electrical connector 10, and becomes more remarkable as the number of terminals 20 increases. Further, since the resin forming the insulating housing 40 flows into the cutout opening 32, the insulating housing 40 and the terminal 20 can be firmly integrated, and the terminal 20 can be prevented from being loosened.

Also, the solder balls 33 are provided on the terminals 20.
Since a part is projected from the insulating housing 40 by fusing, the electric connector 10 having a BGA structure can be formed, and the electric connector 10 having a high number of poles and a high density can be formed. The other party's electric connector 50 is also the same.
It is also possible to configure the electric connector without the solder balls 33. In that case, the carrier connecting piece 30 of the terminal 20 is provided with a DI extending outside the insulating housing 40.
A pin-shaped solder tail for P soldering and a solder tail for SMT soldering are continuously provided, and the carrier 34 is continuous to these solder tails via a cut portion.

[0034]

As described above, according to the present invention,
Since the insulating housing is formed by overmolding the terminals arranged in parallel at a predetermined pitch, it is possible to eliminate the press-fitting step of the terminals and provide an electrical connector which can be manufactured efficiently and easily. In particular, the effect is further exerted in a connector using a large number of terminals. Further, since no gap is formed on the boundary surface between the terminal and the insulating housing, it is possible to provide an electrical connector that prevents solder buildup and flux buildup and does not impair the electrical connection performance by soldering.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view of a fitted state of an electric connector device according to an embodiment of the present invention.

FIG. 2 is a perspective view of a terminal of one electric connector that constitutes the electric connector device of the embodiment.

FIG. 3 is a partial front view of a state in which the terminal of one of the electric connectors is connected to the carrier.

FIG. 4 is a side view of FIG.

FIG. 5 is a partial perspective view showing only a terminal, a contact pin, and a solder ball in a fitted state of the electric connector of the embodiment.

FIG. 6 is a perspective view of a terminal that constitutes a conventional electric connector.

FIG. 7 is a schematic front view of a conventional electric connector device in a fitted state.

[Explanation of symbols]

10 electrical connector 20 terminals 21 board part 23 continuous pieces 24 contact pairs 30 carrier connecting piece 31 Bent 32 Notch opening 33 Solder Ball 40 insulated housing 41 recess 42 opening 50 counterpart electrical connector 60 contact pins 61 base 62 solder balls 80 insulated housing 81 opening

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Nobuya Tezuka, Inventor             1-5-4 Fukami Higashi, Yamato City, Kanagawa Prefecture             Inside Molex Co., Ltd. F-term (reference) 5E023 AA04 AA16 BB02 BB22 BB29                       CC02 CC22 EE03 EE10 EE11                       EE27 FF01 GG01 HH05 HH16                       HH18                 5E077 BB23 BB31 BB37 CC02 CC22                       CC26 DD01 EE21 GG03 JJ08

Claims (6)

[Claims] 1. An electric connector 10 for mounting a circuit board, comprising an insulating housing 40 and terminals 20 arranged in parallel at a predetermined pitch, wherein the terminal 20 is a flat board portion 21, and the board portion 21. The contact pair 24 formed by the continuous piece 23 folded back from the board portion 21 on one side surface of the one side, and the carrier connecting piece 30 bent at a substantially right angle from the board portion 21 on the other side surface side of the board portion 21. The insulating housing 40 is overmolded around the substrate portion 21 of the terminal 20 and is formed in a substantially flat plate shape to hold the terminal 20. The contact pair 24 of the terminal 20 has a contact pair 24 of the insulating housing 40. It is characterized in that the carrier connecting piece 30 extends in the direction of the one surface 40A and extends in the direction of the other surface 40B of the insulating housing 40. Electrical connector to. 2. The electrical connector according to claim 1, wherein the contact pair 24 provided in the terminal 20 is accommodated in a recessed portion 41 formed on the one surface 40A side of the insulating housing 40. 3. The other surface 40B of the insulating housing 40.
On the side, the opening 42 reaching the substrate portion 21 of the terminal 20
3. The electrical connector according to claim 1 or 2, further comprising a solder ball 33 which is provided and which is fused to the substrate portion 21 through the opening 42 and protrudes to the outside of the other surface 40B of the insulating housing 40. 4. A notch opening 32 is formed along the bent portion 31 at a bent portion 31 where the base plate portion 21 of the terminal 20 and the carrier connecting piece 30 are continuous, and the resin forming the insulating housing 40 flows in. The electrical connector according to claim 1. 5. The electrical connector 10 according to any one of claims 1 to 4, a contact pin 60 that engages in a one-to-one correspondence with each contact pair 24 of the terminals 20 arranged in parallel, and these contacts. An electrical connector 50 that is overmolded on the pin 60 and is formed into a substantially flat plate shape and is made up of a mating insulating housing 80 holding the contact pin 60.
An electrical connector device composed of and. 6. The contact pin 60 is provided on one surface 80A side of the insulating housing 80 of the counterpart electric connector 50.
Is provided with an opening 81 reaching the base 61 of the contact pin 60, and is fused to the base 61 of the contact pin 60 through the opening 81.
The electrical connector device according to claim 5, further comprising a solder ball 62 protruding outside one surface of the insulating housing 80.