JPH0245306B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Conventionally, one of the methods for supplying power to a printed circuit board that requires the supply of a relatively large current is to float and fix the power supply bus bar in order to improve the power supply characteristics. In order to simplify the shape, as shown in Figures 1 to 3, after soldering the electrical contact spacer 1 to the 4th surface of the printed circuit board using a soldering iron, etc., There is a means to secure current conduction by using fastening screws 7 from the back side of the board and fastening them into the holes 2 or the mounting holes of the terminal portions 6.
According to this, the requirements for improving the power supply characteristics and simplifying the laminated busbar shape can be met, but the method for attaching the electrical contact spacer 1, which is soldered to the board surface in advance, especially the electrical connection to the board surface, can be met. There are disadvantages such as uncertainty in determining the position of the spacer and the need for skilled soldering work.

The present invention provides a connection structure for a power supply motherboard that solves the difficulties associated with the above-mentioned electrical contact spacer. In FIGS. 4 and 5 showing an embodiment of the present invention, a plate-shaped conductor is punched, bent, and surface-treated to form a through-hole 15 in the center.
The spacer 13 with the spacer 13 is manufactured and the legs 14 of the spacer 13 are inserted into the printed circuit board 12 side by a through-hole process, or the spacer fixing hole 17 is a transparent hole, and the through-hole process is performed, or the spacer 13 is simply provided with a through-hole 18. An electric contact land 16 is provided,
After inserting the legs 14 of the spacer 13 into the holes 17 provided near the electrical contact land 16, the legs 14 of the spacer 13 protruding from the back side of the board 12 are bent as much as possible to prevent them from falling off the board surface. ,
Next, a reflow soldering process using an automatic soldering device or a hot plate is performed to connect the spacer 13 and the board 1.
Electricity is ensured between the two lands 16. Then, it is connected to the tapped hole 11 of the power supply bus 10 from the back side of the printed circuit board 12 using screws 19 or the like to supply electricity. Conductive spacer 1
3 serves as an intervening material for electrically connecting the electrical connection land 16 and the power supply bus 10 by lifting the power supply bus 10 by a certain amount equivalent to the thickness of the spacer 13 from the surface of the printed circuit board 12 in the mounted state. . The legs 14 of the conductive spacer 13 cooperate with the spacer fixing hole 17 provided near the land 16 when the spacer 13 is attached to the electrical contact land 16 of the printed circuit board 12 to determine the position of the conductive spacer 13. Because it functions to fulfill the
The attachment of the conductive spacer 13 to the electrical contact land 16 can be easily carried out using automatic high-efficiency means, etc., so that the above-described soldering between the spacer 13 and the land 16 can be quickly performed. become. The power supply bus 10 is a copper bus bar or an aluminum bus bar with tap holes 11 provided at predetermined intervals in relation to the lands 16 and insulated except for the electrical contact portions, or a plate-shaped conductor having connection terminals at predetermined intervals. It is possible to use a laminated bus bar in which a plurality of layers are laminated with an insulating material interposed therebetween.

As described above, the present invention provides a connection structure between a power bus and a printed circuit board in which power is supplied to the printed circuit board by using a power bus through a conductive spacer to an electrical contact land formed on the printed circuit board. , the conductive spacer provided to lift the power bus from the electrical contact land of the printed circuit board is provided with legs that can be attached to fixing holes provided near the electrical contact land. In addition, since the conductive spacer and the electric contact land are configured to form electrical continuity, mutual positioning between the two when attaching the conductive spacer to the electric contact land is facilitated and ensured. At the same time, it is also possible to conduct the soldering between the electric contact land and the conductive spacer properly under the above-mentioned secure positioning conditions. Therefore, in a structure in which a conductive spacer is interposed between the power supply bus and the printed circuit board, the spacer soldering work with the above configuration can be performed using an automatic soldering device or a reflow soldering device. This makes it possible to perform an inexpensive mounting process for the power supply bus, and to simplify and increase the accuracy of the spacer positioning means.

[Brief explanation of drawings]

Fig. 1 is a partial perspective view conceptually showing a conventional method for connecting a power bus to a circuit board;
3 and 3 are sectional views of essential parts showing the connection state of FIG. 1, FIG. 4 is a partial perspective view similar to FIG. The figure is a cross-sectional configuration diagram of the main parts after the connection is completed. 13... Spacer, 14... Leg, 16... Electrical land, 17... Spacer fixing hole.

Claims (1)

[Claims] 1. A power source that attaches a conductive spacer to the electrical contact land formed on the printed circuit board, and presses the electrical contact land and the electrical contact part of the power supply bus through the spacer with a fastener to establish continuity. In the connection structure between the bus bar and the printed circuit board, the conductive spacer for lifting the power bus bar from the electrical contact land of the printed circuit board is a leg that can be attached to a fixing hole provided near the electrical contact land. What is claimed is: 1. A connection structure for a power supply bus bar, comprising: a conductive spacer and an electric contact land;