JPH02868Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to electrical connectors, especially those with multiple terminals (100
This invention relates to electrical connectors for mounting on printed wiring boards (pins or higher).

[Conventional technology]

Conventionally, the back wiring board (hereinafter referred to as BWB) of computers and electronic exchanges was connected to the printed wiring board by attaching a female connector for inserting the printed wiring board to the BWB side, and using gold-plated connections on the printed wiring board. The main structure was that the plug part was a male connector.
However, due to the need for downsizing, high-density integration, and high-speed operation of devices, there is a need for highly reliable electrical connectors that are compact, have a multi-terminal configuration, and are not affected by electrical noise.

[Problem that the invention attempts to solve]

Conventional direct electrical connectors that use the connectors on printed wiring boards as described above can only be used on two sides, making it difficult to make multiple terminals. Indirect type electrical connectors that connect parts are becoming mainstream. Mounting such a multi-terminal indirect electrical connector on a printed wiring board requires soldering work between the through hole and the contact terminal, and the soldering work is usually the same as for electronic components such as ICs and transistors. Because it is done in the process, it is subject to flux intrusion. This flux generally forms bubbles in current solder baths and enters minute gaps due to capillary action, surface tension, etc. Generally, this flux is removed by repeatedly using vaporized cleaning liquid, cold liquid, etc., but if it enters a narrow gap, the removal effect is not sufficient and the contacts used in electrical connectors may be removed. In the case of a contact configuration, contamination of this contact (Cl ^- in flux) causes electrical connection failure.
As an improvement measure for this problem, there is a structure in which the contactor is changed from the one-contact configuration shown in FIGS. 2c and d to the two-contact configuration shown in FIGS. 2a and b in order to reduce the probability of contamination as a multi-contact structure. However, in order to accommodate such a contact whose cross section is bent into a U-shape so that the contact portions face each other in the contact window of the housing, the plate thickness must be reduced. In order to secure the desired contact force with such a thin contact, it is necessary to make a large displacement of the contact part, and as a result, the gap between the opposing contact parts becomes small, making it difficult for the cleaning liquid to penetrate and ensuring sufficient flux cleaning. There was a problem that it could not be done.

In addition, contacts are usually gold-plated during manufacturing, but if the gap is small, it is difficult for current to flow, and in order to ensure the plating thickness of the contact, excess gold is deposited on other parts, reducing the amount of gold used. Because of the increase in the number of electrical connectors, a problem arises in that the cost of electrical connectors increases.
In other words, the manufacturing cost of electrical connectors increased, the removal effect of flux that adhered when electrical connectors and electronic components were mounted on printed wiring boards was not sufficiently effective, and even the use of two contacts did not necessarily lead to improved connection reliability. .

Furthermore, conventional multi-terminal indirect electrical connectors with 100 or more terminals have had the problem of increased insertion force.

[Means for solving problems]

The electrical connector of the present invention is composed of a flat plate of a conductive material, and extends from one end of each longitudinal direction toward the other end, and has contact portions provided adjacent to each other on the tip side in the thickness direction of the flat plate. a contact part having two contact springs bent on one side of the single plate so that the contact part is displaced to the side thereof; and a terminal part extending from one end of the contact part and inserted into a through hole of a printed wiring board. an electrical contact comprising; a housing having a plurality of mounting holes arranged; It is characterized in that the upper and lower contact portions are arranged rearwardly and the positions of the contact portions are different between the upper and lower sides.

In short, the present invention has two contact springs on the same side of a flat plate, and by arranging the contact parts adjacent to each other and facing each other, it is possible to achieve multiple contacts and to apply thick film gold plating to the contacts from one side. Therefore, it is easy to manufacture, and even though it has a contact with a two-contact structure, a gap equivalent to that of a contact with a single-contact structure can be provided between the contact portion and the housing wall, and the flux cleaning effect can be improved. Therefore, an electrical connector with high contact reliability and low cost is provided.

In other words, in this invention, by providing two contact springs on the same side of a flat plate, the contact part is on one side, so it is possible to use the currently commonly used partial gold plating method using masking, which reduces the amount of electrodeposited gold. Being able to manufacture connectors that are economical and cost-effective;
On the other hand, from the usage side, since there are two contacts arranged adjacent to each other, compared to the conventional two-contact configuration, there is ample space between the housing wall and the contacts, so the connector can be soldered to the printed wiring board. It is possible to improve the cleaning effect of flux that adheres when cleaning. Also, compared to a single contact configuration, the possibility that flux and dust remain in the contact area is simply reduced to 1/2.
In fact, parallel connection of switches and the like improves connection reliability by more than an order of magnitude. In addition, since the contactor has two contact points, the contact force can be reduced, staggered contact is possible, and the peak value of the insertion force can be reduced. Being able to reduce the contact force makes it possible to lower the height of the contact spring, which allows for a larger gap between the contact and the housing wall, making it easier for the cleaning fluid to flow and increasing the flux cleaning effect, resulting in high contact. Reliability can be ensured.

Further, by arranging the contacts in a plurality of mounting holes provided in the housing with their contact positions being shifted from each other, the insertion force can be further reduced.

Furthermore, the conductor length of the contact can be reduced, improving transmission characteristics (crosstalk) and reducing damage caused by arcing in the contact portion due to energized insertion and removal.

〔Example〕

Next, the present invention will be explained with reference to the drawings. Referring to FIGS. 1a and 4, an electrical connector 9 according to an embodiment of the present invention includes an electrical contact 8 in a mounting hole 10 of a housing 18, and a first
A male pin 12 held by a male connector 11 shown in FIG. Electrical contact 8 is the third
As shown in the figure, the terminal part 3 is made of a flat plate of conductor.
and a contact portion 19. Contact part 19
has two contact springs 4 and 5 extending from one longitudinal end to the other end, and contact portions 6 and 7 are adjacent to each other on the distal end sides of the contact springs 4 and 5, respectively. It is set up like this. Further, the contact springs 4 and 5 are bent toward one side of the flat plate of the contact portion 19 so that the respective contact point portions 6 and 7 are displaced in the thickness direction of the flat plate of the contact portion 19. The terminal portion 3 extends from one end of the contact portion 19 and is inserted into and connected to the through hole 2 of the printed wiring board 1. The male pin 12 of the male connector 11 is connected to the BWB shown in FIG. 1c. Electronic components such as IC13 are mounted on the printed wiring board 1.
Terminal portion 14 of No. 3 and terminal 3 of electrical connector 9 are connected to through holes 15 and 2, respectively, by soldering. Usually, an automated device is used for this soldering work, and the flux is turned into bubbles, which may reach the contact portions 6 and 7 from the terminal 3 or the window 16 due to capillary action, surface tension, etc.
For this purpose, after the soldering work, the contacts 6 and 7 are repeatedly cleaned with cold liquid and steam chlorocene cleaning.
Since the window 16 of the electrical connector 9 is usually small, about 1 mm, the convection of the cleaning liquid may not be sufficient and the cleaning effect may not be achieved. In this case, if the contact configuration is only contact spring 4, there is a high possibility that flux will remain and lead to contact failure.
If there are two contact points with contact springs 4 and 5, the possibility of flux remaining attached is reduced, and contact reliability can be improved.

In addition, since the two contact springs 4 and 5 are provided on the same side of the leaf spring and the contact parts 6 and 7 are arranged adjacently and oppositely, masking plating can be applied using commonly used metal saving methods. Since the amount of electrodeposited gold can be reduced, costs can be reduced.

Further, by making the contactor 8 have two contact points, the contact force can be reduced, staggered contact and the height of the contact portion can be kept low, so the peak value of the insertion force can be reduced and the operability can be improved.

Next, returning to FIG. 1a and FIG. 4, in the housing 18, the contacts 8 are arranged as a set, one at the top and one at the bottom, in the respective mounting holes 10 facing back to each other. The positions of the upper and lower contacts 8 are different. A plurality of mounting holes 10 are provided, and as described above, the positions of the contact portions 6 and 7 of the contactor 8 disposed inside are different between the upper and lower sides, with the upper and lower adjacent holes being set as one set. For this purpose, when the male pins 12 shown in FIG. The contact portions 7 and 6 of the contactor 8 are connected to the remaining male pin 1.
Contact with 2. That is, since the timing of contact with the male pin 12 can be divided, the insertion force of the male connector 11 into the electrical connector 9 can be further reduced.
Furthermore, by arranging the upper and lower pairs of contacts 8 backwards, the vectors of the contact forces acting on the male pins 12 are averaged, and the insertion operation of the male connector 11 becomes well-balanced.

Referring to FIG. 4, the mounting hole 10 and the contact 8
Focusing on the relationship between the contact part 6 and the housing 1
The gap 17 between the eight walls can be made larger. In addition, the length of the conductor can be reduced, improving transmission characteristics (crosstalk) and reducing damage caused by arcing at the contact portion due to energized insertion and removal.

[Effect of idea]

As explained in detail above, according to the present invention, two contact springs are provided on the same side of the leaf spring, and a contactor with contact portions arranged adjacent to each other is inserted into the mounting hole of the housing with the contact position with the male pin shifted, and By oriented in the opposite direction, an electrical connector with high reliability, low cost, low insertion force, and good operability can be obtained.

[Brief explanation of the drawing]

FIG. 1a is a perspective view of an embodiment of the present invention, FIGS. 1b and 1c are perspective views showing a male connector and BWB, respectively, which are connected to the electrical connector of FIG. 1a,
Figures 2a, b, c and d are perspective views of conventional female contacts, Figure 3 is a perspective view of the contact employed in the electrical connector of Figure 1a, and Figure 4 is a perspective view of a conventional female contact. 1
Figure a shows a cross-sectional view of the electrical connector of figure a; 1... Printed wiring board, 2, 15... Through hole, 3... Terminal section, 4, 5... Contact spring, 6, 7
...Contact part, 8...Contactor, 9...Electrical connector,
10...Mounting hole, 11...Male connector, 12...
...Male pin, 13...IC, 14...Terminal section, 1
6...Window, 17...Gap, 18...Housing,
19...Contact part.

Claims (1)

[Claims for Utility Model Registration] Consisting of a flat plate of a conductor, contact portions extending from one end of each longitudinal direction toward the other end and adjacent to each other on the tip sides are arranged in the thickness direction of the flat plate. a contact part having two contact springs bent on one side of the flat plate so as to be displaced by the flat plate, and a terminal part extending from one end of the contact part and inserted and connected to a through hole of a printed wiring board. an electrical contact comprising; a housing having a plurality of mounting holes arranged in a plurality of rows; and a housing having mounting holes arranged in plurality; 1. An electrical connector characterized in that the electrical connector is disposed backwardly and the positions of the contact portions are different between the upper and lower sides.