JPH04112474A - Printed circuit board connector - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a connector for electrically connecting two printed circuit boards arranged substantially horizontally in electronic equipment;
That is, the present invention relates to a printed circuit board connector that connects two printed circuit boards after predetermined parts are soldered and attached to each of the two printed circuit boards.

Conventional technology The conventional technology will be explained with reference to FIGS. 5 to 7.

FIG. 5 explains a general method of connecting this type of connector. Near the end of one printed circuit board 1,
A first connector A having a movable contact part 4 made of an elastic thin metal plate is fixed on the upper part of a fixed contact 2 made of a metal plate to be soldered to a printed circuit board via a rotating part 3, and fixed by soldering to the other printed circuit board 5. A second connector B having a fixed metal contact 6 that engages with the movable contact portion 4 is fixed by soldering near the end of the connector B.

When fixing the first connector A to the printed circuit board 1 by soldering, the movable contact portion 4 of the first connector A is
is located at an angle almost perpendicular to the printed circuit board 1,
The coupling clip contact 7 is oriented almost horizontally, or the soldering is completed, and both printed circuit boards 1 and 5 are connected to each other.
After each is attached to a predetermined position on the set base, the movable contact section 4 of the first connector A is rotated and brought down as shown by the arrow, and the coupling clip contact 7 is attached to the second connector B. This is to engage the fixed contact 6 of.

Here, the rotating part 3 for rotating the movable contact part 4 of the first connector A is inserted into the round hole 9 in both end walls of the resin/1 unung 8 for the fixed contact 2, as shown in FIG. It is constructed by fitting round dowels 11 on both end faces of a resin unung 10 for the movable contact 4.

The two housings 8 of this first connector A,
With the rotation of the rotating part 3 comprised between 10 and 10, the fixed contact 2 and the movable contact 4 mounted in these housings also rotate while maintaining electrical continuity.

The general configuration of this part is shown in FIG.

The fixed contact 2 is made of a metal plate whose surface is solder-plated, and is attached to the printed circuit board 1 by a foot portion 12 and a contact flat plate portion 13 with the movable contact 4. This flat plate portion 13 is also The U-shaped clip contact 14 elastically clamps the solder-plated movable contact 4 made of an elastic thin metal plate, allowing rotation without maintaining electrical continuity between the fixed contact 2 and the movable contact 4. It becomes.

As a surface treatment for these contact parts, it is common to apply tin plating containing lead (ie, solder plating) in view of the need for soldering, stability against environmental corrosion, and low cost.

Then, on the other end side of the movable contact 4 connected by the narrow connecting part 15, the coupling clip contact 7 is connected to the second connector B by the rotation of the movable contact part 4.
It is configured to receive and engage the fixed contact 6 of.

However, in the conventional printed circuit board connector described above, the U-shaped clip contact 14 of the movable contact 4 always elastically clamps the contact flat plate portion 13 of the fixed contact 2. That is, even before the first connector A is soldered to the printed circuit board 1, the contact portion between the U-shaped clip contact 14 and the flat plate portion 13 is
The state is such that contact pressure is applied by the clip contact 14.

Therefore, when attaching the fixed contact 2 of the connector A, when the heat generated when the foot part 12 is soldered and fixed to the copper foil surface of the printed circuit board 1 is transmitted to the contact flat plate part 13, the U-shaped clip on the upper J contact part There is a problem in that the solder plating on both the contacts 14 and the flat plate portion 13 melts and fuses, and when cooled, the two contacts become stuck together.

Then, when the soldering is finished and the movable contact part 4 of connector A is rotated in order to engage the first connector A and the second connector B, the fixed part of the solder plating is forcibly removed. As a result, the solder plating may be removed on either the U-shaped clip contact 14 or the flat plate portion 13, or the solder plating may be separated and broken, causing the contact surface to become rough, and as a result, this portion may be exposed to gas in the atmosphere. etc., it becomes easy to corrode and the contact resistance increases,
There was a problem with unstable contact.

The present invention solves these conventional problems, and aims to provide an excellent printed circuit board connector in which the solder plating on the surface of the rotating contact does not melt due to the heat of soldering. It is.

Means for Solving the Problems In order to solve the above problems, the present invention provides that when the fixed contact portion of the first connector A is soldered to the printed circuit board, the U-shaped clip contact elastically contacts the fixed contact. There is no clamping, that is, the U-shaped contacts are not in elastic contact with the fixed contacts, but the soldering is fixed and the movable contact portion is moved to engage the first connector A and the second connector B. When rotated, it elastically clamps either the U-shaped clip contact of the movable contact or the fixed contact.

Therefore, according to the present invention, when the fixed contact portion of the first connector A is attached, the heat generated when the foot portion is soldered and fixed to the printed circuit board is transferred to the fixed contact near the U-shaped clip contact of the movable contact. Even if the solder plating on the surface of the clip contact melts, the solder plating on the surface of the clip contact will not melt, and the molten solder plating will not melt because the clip contact is not in elastic contact with this part, and the molten solder plating will cool down. When this is done, it solidifies in the same state as before melting, so it does not have the problems of the prior art.

Embodiment An embodiment of the present invention will be explained with reference to FIGS. 1 to 4. FIG. 1 is an external perspective view, and FIG. 2 is a side sectional view. In the same figure, 21 and 22 are housings made of insulating resin constituting the first connector C; 21 holds a contact vial 23 through its box-shaped bottom surface, and )-wound 22 holds a movable contact 24. These two housings can be rotated relative to each other by fitting the dowels 26 on both end faces of the housing 22 into the round holes 25 on both end walls of the housing 21, as shown in FIG. 3, as in the prior art. It has a structure.

The contact bin 23 is a straight metal bin whose surface is solder-plated, and is fixed through the bottom of the housing 21, with a portion 27 protruding downward to the outside connected to the printed circuit board 29.
The part 28 that protrudes upwardly and inward becomes a contact part with the movable contact 24.

The movable contact 24 is made of an elastic thin metal plate whose surface is solder-plated, and U-shaped clip contacts 31 and 32 each having an opening in the right angle direction are integrated at both ends of the narrow connecting portion 30. One clip contact 31 is held near the center of rotation of the housing 2122, and the other clip contact 32 is held at the movable end of the housing 22, as in the conventional example. .

As shown in FIG. 2, when the housing 22 holding the movable contacts 24 of the first connector C is placed in an angular position approximately perpendicular to the printed circuit board 29, the clip contacts 32 at the movable end are The clip contact 31, which is oriented in the horizontal direction but is closer to the center of rotation, is inserted into the gap at the base of the U-shaped bend within the insulating housing 21, as shown in FIG. 4(A). bottle 2
The upper end portion 28 of 3 is inserted from the side and is held inside. This clip contact 31 has a width at the inner part of the bent base that is slightly larger than the outer diameter of the contact pin 23, and a tapered tip that is narrower.
Even if it comes into contact with the contact pin upper end 28 in this state, it will not be clamped by elastic pressure. Note that 31a indicates a narrowed elastic contact portion.

In this state, after fixing the mounting feet 27 of the first connector C to the printed circuit board 29 by soldering, the insulating housing 22 holding the movable contacts 24 is rotated in the direction shown by the arrow in FIG. A second connector D has a clip contact 32 fixed to another printed circuit board 33 by soldering.
The fixed contact 34 is engaged with the fixed contact 34 .

At this time, as the housing 22 and the movable contact 24 rotate, the clip contact 31 also rotates, changing from the state shown in FIG. 4(A) to the state shown in FIG. 4(B), and further to the state shown in FIG.
), the upper end portion 28 of the contact pin is sandwiched between the opposing elastic contact portions 31a of the U-shaped clip contact 31, and the contact pressure between the movable contact 24 and the contact pin 23 is completely maintained. It becomes electrically conductive.

In this way, the circuits on printed circuit boards 29 and 33 are electrically connected via connectors C and D.

Effects of the Invention As is clear from the above examples, the present invention has the following effects.

When fixing the contact pin mounting foot 27 of the first connector to the printed circuit board by soldering, there is an elastic Since no contact pressure is applied during soldering, even if the heat during fixation is transmitted to the upper end of the fixed contact, the solder plating on both surfaces will not melt and fuse together.

Furthermore, the opposing elastic contact portion of the clip contact that clamps the upper end of the contact pin when the movable contact 24 is rotated after the soldering is fixed is sometimes separated from the contact pin (because this portion Surface plating is hardly affected by soldering heat.

Therefore, stable contact can be ensured between the contact pin and the movable contact.

[Brief explanation of the drawing]

Fig. 1 is an external perspective view of an embodiment of the printed circuit board connector of the present invention, Fig. 2 is a sectional view of the same side, Fig. 3 is an exploded perspective view of the same, and Figs. 4 (A) to (E) are the same. Explanatory diagram showing the sandwiching relationship between the contact pin and the clip contact, which are the main parts, No. 5
The figure is a side sectional view of a conventional printed circuit board connector, FIG. 6 is an exploded perspective view of the same, and FIG. 7 is a perspective view of a contact pin and a clip contact, which are the main parts. 21.22...Housing, 23...
Contact pin, 31...Clip contact. Figure 1 21, 22 Haunon 7' Figure 2 21.22 Hawasin 7' 23 Kore Taft Jin 317II Tsuacon 7fL Figure Figure Figure Figure Figure Figure

Claims (3)

[Claims] (1) A pair of insulating resin housings connected at least rotatably, a solder-plated contact pin held in one of the housings, and a contact pin held in the other housing. It consists of a U-shaped clip contact made of a thin metal plate with a base portion whose head is larger than the diameter of the pin contact, and whose tip is narrower than the diameter of the pin contact, and the clip contacts rotate as the insulating resin housing rotates. A connector for a printed circuit board in which a contact is rotated, the pin contact is moved from a position at the base of the clip contact to a tip of the clip contact, and the pin contact is elastically clamped by the clip contact. (2) The printed circuit board according to claim 1, wherein one housing holds a plurality of pin contacts, and the other insulating resin housing holds a plurality of U-shaped clip contacts corresponding to the plurality of pin contacts. connector. (3) A second clip contact is integrally provided via a connecting portion extending from the base of the U-shaped clip contact made of an elastic thin metal plate, and the second clip contact is formed by rotating the insulating resin housing. 3. The printed circuit board connector according to claim 1, wherein the connector is connected to a second pin contact attached to another printed circuit board.