JP2000003746A - Connector for printed circuit board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the generation of short-circuit in terminals, while preventing the floating of multiple contact terminals as mounting them at a high density, in a connector to be mounted in the printed circuit board by soldering. SOLUTION: A connector A for printed circuit board is formed of an insulating housing provided with plural through-holes in which contacts are fit and fixed in plural stages parallel with each other and each contact, of which tip is fitted in each through-hole for fixation and of which rear end is fixed to a printed circuit board. In this case, a deformation preventing plate 14 for preventing the lifting of the terminal at mounting of the connector in the printed circuit board is integrally provided with the rear end 13b of each contact.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector to be mounted on a printed circuit board by soldering, and more particularly, to a high-density floating of a large number of contacts when mounted on a printed circuit board and the terminal associated therewith. The present invention relates to a connector having a structure for preventing a short circuit.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 6, a connector for a printed circuit board has been used for connecting a package board to a back panel to a cable in a transmission / exchange apparatus. 8 is implemented. Then, the BP (back panel) male connector 3 attached to the back panel 2 fixed to the back surface side of the frame 1 of the transmission / exchange device is inserted together with the package board 8 from the front side opening and connected. Things.

[0003] On the outside of the frame of the back panel 2,
The rear housing 7 is fixed by the mounting bracket 6, and the male contacts 4 protruding from the BP male connector 3 are inserted into the through holes of the rear housing 7 and protrude into the housing 7. The electric circuit of the package substrate 8 is electrically connected to the cable connector 10 by inserting the cable connector 10 for electrical connection with the cable connector 10.

[0004]

However, as shown in FIG. 7, the rear end portions 11b of a large number of contacts 11 are soldered to the through holes of the package substrate 8, and are mounted by positioning them with the projections 9e. Female connector 9
In the mounting step, as shown in FIG.
Since the contact tips 11a are inserted into the package substrate 8 and a large number of contacts 11 are arranged at a high pitch and a small pitch and the contact legs 11c are arranged long in the upper stage, as shown in FIG. At the edge of the through hole, the contact rear end 1 protruding downward from the alignment plate 12
1b may collide and not penetrate normally.

As a result, the contact leg 11c, whose leg is lengthened and whose strength is weakened, is easily deformed,
There is a possibility that the contact may come into contact with another adjacent contact leg and cause an electrical short circuit.

[0006] Even if the terminals are lifted during the mounting of the connector, a large number of the contacts 11 are provided.
Are arranged in multiple stages, and there is a problem that it is difficult for the naked eye to immediately confirm the state of the contact portion between the contacts inside.

As described above, in a connector for mounting a printed circuit board such as a male connector of a package in which a large number of contacts are arranged, the contact may be caught on an edge of a through hole of the printed circuit board because of a high-density contact arrangement.
In addition, there is a problem to be solved in that since the legs of the contacts are elongated in order to align a large number of contacts, the contacts are easily deformed and may be electrically short-circuited.

[0008]

The gist of the present invention for solving the above-mentioned problems of the printed circuit board connector according to the present invention is that a plurality of through holes into which contacts are fitted and fixed are provided in parallel and form a row. A printed board connector comprising: an insulating housing in which rows are provided in a plurality of stages; and a contact having a front end fitted and fixed in each of the through holes and a rear end fixed to the printed board. The rear end of the contact is provided integrally with a deformation preventing plate for preventing the terminal from floating when mounted on a printed circuit board.

[0009] The deformation preventing plate is integrally molded at a predetermined position at the rear end of the contact for each row of contacts; and both end surfaces of the deformation preventing plate in a direction perpendicular to the longitudinal direction are provided. An engagement member for connecting the deformation preventing plate of another contact row adjacent thereto is provided; and further, provided on both side walls of the insulating housing at both longitudinal end surfaces of the deformation preventing plate. And an engaging member that engages with the engaging portion provided.

According to the connector for a printed board according to the present invention, the deformation preventing plate integrally provided at the rear end of the contact is provided at the edge of the through hole without the rear end of the contact penetrating the through hole of the printed board. Even if it gets stuck, the deformation of the contact is prevented.

Accordingly, some of the contacts are mounted while being deformed by being caught by the through holes, and are prevented from coming into contact with other nearby contacts and being electrically short-circuited.

Further, since the deformation preventing plate is integrally formed for each row of the contacts, it is easy to assemble the connector. Further, since the deformation preventing plates of each contact row are connected to each other successfully, the deformation preventing plates also serve as an alignment plate for contacts as a whole. Then, since the deformation preventing plate is engaged with the side wall of the insulating housing by the engaging members on both side end surfaces in the longitudinal direction,
Even when the rear end of the contact collides with the edge of the through hole of the printed circuit board to be mounted, the deformation preventing plate strongly resists.

[0013]

Next, the present invention will be described with reference to the drawings. Note that, for easy understanding of the present invention, portions corresponding to the conventional example are denoted by the same reference numerals as the conventional example.

A connector A for a printed circuit board according to the present invention
As shown in FIG. 1 and FIG. 2, a plurality of (for example, about 50) through holes 9a in which the tip portions 13a of the contacts 13 are fitted and fixed are provided in parallel to form a row in the horizontal direction. There is an insulating housing 9 whose rows are provided in a plurality of stages in the vertical direction, for example, eight stages.

Side walls 9b and 9c extend from both longitudinal ends of the insulating housing 9 in a direction perpendicular to the longitudinal direction. Further, a projection 9e for positioning at the time of mounting on a printed circuit board is protrudingly provided below the side walls 9b and 9c.

As shown in FIG. 2, a contact tip portion 13a is fitted and fixed to each through hole 9a of the insulating housing 9 by press fitting.

The contact 13 extends rearward from the contact tip 13a and is bent rearward in a direction (downward) perpendicular to the axis of the through hole 9a via a leg 13c obliquely inclined. There is a part 13b. In the contact 13, the leg 13c between the front end 13a and the rear end 13b is bent at substantially a right angle in the lower row, and the sloping portion becomes longer gradually in the upper row. .

The contact rear ends 13b, 1 for each row
As shown in FIGS. 3A and 3B, a synthetic resin deformation preventing plate 14 is integrally provided at predetermined positions 3b,. The deformation preventing plate 14 is insert-molded with the contact rear end portion 13b inside the synthetic resin molding die. The contact rear end 13
In order to enhance the adhesion strength with the deformation preventing plate 14,
3d is provided.

The shape of the deformation preventing plate 14 is a flat plate which is long along the row of the contacts 13 and has an engaging projection 14a as an engaging member on both end surfaces in a direction perpendicular to the longitudinal direction.
And an engagement recess 14b. This engagement projection 14
The deformation preventing plate 14 is successfully connected in the short direction (the direction perpendicular to the long direction) by the a and the engaging recess 14b.

As shown in FIG. 3B, supporting projections 14 which are engaging members for engaging with and supporting the insulating housing 9 are provided on both end surfaces in the longitudinal direction of the deformation preventing plate 14.
c and 14d are protrudingly provided.

In connection with the supporting projections 14c and 14d, the side walls 9b and 9c of the insulating housing 9 are provided with the structure shown in FIG.
As shown in (c), a horizontal groove 9d is provided in a required range of length from the end face of the side wall toward the inside.

Further, the deformation preventing plate 1 integrated with the contact rear end portion 13b of the first row which is the lowermost row of the contact row.
As shown in FIG. 3 (d), 4 has an engaging recess 14b and no engaging projection 14a. However, the insulating housing 9
Depending on the shape of the side, it is free to adopt a structure in which an engagement member such as an engagement protrusion is provided.

The connector A for a printed board is constructed as described above, but the relationship between the engaging projections 14a and the engaging recesses 14b, which are the engaging members of the deformation preventing plate 14, may be reversed. Similarly, the supporting projections 14c, 14d and the concave grooves 9d
The relationship may be reversed. Further, the engaging protrusions 14a and the engaging recesses 14b may not be uniformly continuous along the longitudinal direction of the deformation preventing plate 14, but may be provided at predetermined intervals.

The connector A for a printed circuit board is shown in FIG.
As shown in FIG. 3 to FIG. 3 (C), the deformation preventing plates 14 integrated with the contact rear ends 13b are inserted into the through holes 9a of the insulating housing 9 from the first row of contacts at the bottom in the side walls 9b and 9c. The supporting protrusions 14c, 1 are provided in the concave grooves 9d, 9d.
4d is inserted and supported by the side walls 9b and 9c, and the contact tip 13a is press-fitted, and the next contact second row is mounted on the insulating housing 9 in the same manner, and this is repeated. .

After the assembly, the deformation preventing plates 14 are successfully connected to each other by the engaging projections 14a and the engaging recesses 14b to prevent the terminals of the contacts 13 from floating when the printed circuit board is mounted, and to form a single alignment plate as a whole. The role is also used.

In the connector A for a printed circuit board constructed as described above, the deformation preventing plate 14 provided integrally with the rear end 13b of the contact is connected to the through-hole of the printed circuit board to be mounted. The deformation of the contact 13 due to the collision of the contact 13b is prevented. Therefore, since the contact leg 13c exerts a resistance without being easily deformed, a failure in mounting is immediately detected, and an electrical short circuit is prevented. In this way, it is possible to solve the problem that some contacts are mounted in a conventional state while being deformed.

[0027]

As described above, in the printed circuit board connector according to the present invention, a plurality of through holes into which contacts are fitted and fixed are arranged in parallel to form a row, and the rows are provided in a plurality of stages. A connector for a printed circuit board comprising: an insulating housing; and a contact having a front end fitted and fixed in each of the through holes and a rear end fixed to the printed circuit board. Since a deformation prevention plate that prevents terminal lifting during mounting on a printed circuit board is provided integrally, some of hundreds of contacts collide with the through-hole edge of the printed circuit board and deform. In addition, there is an excellent effect that the possibility of electrical short-circuit due to terminal floating is eliminated.

Since the deformation preventing plate is integrally molded at a predetermined position at the rear end of the contact for each row of the contacts, it is easy to assemble the connector, and is orthogonal to the longitudinal direction of the deformation preventing plate. At both end surfaces in the direction, engagement members are provided for connecting with the deformation preventing plates of the other adjacent contact rows, so that the resistance to the deformation force of the contacts is increased and the role of the alignment plate as a whole is improved. It has an excellent effect of being fulfilled.

Further, engaging members for engaging engaging portions provided on both side walls of the insulating housing are provided on both end surfaces in the longitudinal direction of the deformation preventing plate. This has an excellent effect that deformation is reliably prevented.

[Brief description of the drawings]

FIG. 1 is a front view of a printed circuit board connector according to the present invention.

FIG. 2 is a sectional view taken along the line aa of FIG.

FIG. 3 is an explanatory view in which a deformation preventing plate is integrally provided at a rear end of a contact (a), a perspective view of the whole (b), and an explanatory view for explaining an engagement relationship between a side wall and a deformation preventing plate (FIG. 3). C),
It is explanatory drawing (d) which shows that a deformation prevention plate is integrally provided in the 1st contact row.

FIG. 4 is a side view of the printed circuit board connector according to the present invention.

FIG. 5 is a rear view of the printed circuit board connector according to the present invention.

FIG. 6 is an explanatory view showing an embodiment of a printed circuit board connector according to a conventional example.

FIG. 7 is a side view of the printed circuit board connector according to the conventional example.

FIG. 8 is a front view of the printed circuit board connector according to the conventional example.

FIG. 9 is a sectional view taken along the line bb in FIG. 8;

[Explanation of symbols]

A Connector for printed circuit board, 1 frame, 8 package board, 9 insulating housing, 9a through hole, 9b, 9c
Side wall, 9d groove, 9e protrusion, 13 contacts,
13a contact tip, 13b contact rear end, 13c leg, 13d projection, 14 deformation prevention plate,
14a engagement projection, 14b engagement recess, 14c, 14d
Supporting projection.

Continued on the front page (72) Inventor Fumio Aoki 4-1-1, Kamiodanaka, Nakahara-ku, Kawasaki-shi, Kanagawa Prefecture Inside Fujitsu Limited (72) Inventor Hideaki Terauchi 4-1-1, Kamiodanaka, Nakahara-ku, Kawasaki-shi, Kanagawa F term in Fujitsu Limited (reference) 5E023 AA04 BB01 BB21 EE03 FF01 HH11 5E077 BB23 BB31 DD01 FF03 JJ18

Claims (4)

[Claims] An insulated housing in which a plurality of through holes into which contacts are fitted and fixed are provided in parallel and form a row, and the rows are provided in a plurality of stages. A printed circuit board connector comprising a contact fixed and a rear end fixed to the printed circuit board, wherein the rear end of the contact has a deformation preventing plate for preventing terminal floating during mounting on the printed circuit board. Wherein the connector is provided integrally with the printed circuit board connector. 2. The printed circuit board connector according to claim 1, wherein the deformation preventing plate is integrally formed at a predetermined position of a contact rear end portion for each row of the contacts. 3. An engagement member for connecting with a deformation preventing plate of another adjacent contact row is provided on both end surfaces in a direction orthogonal to the longitudinal direction of the deformation preventing plate. The printed circuit board connector according to claim 1. 4. An engagement member which engages with an engagement portion provided on each of both side walls of the insulating housing is provided on both end surfaces in the longitudinal direction of the deformation preventing plate. 4. The printed circuit board connector according to 1, 2, or 3.