JPS5850620Y2 - Electric circuit board - Google Patents

Description

[Detailed description of the invention] The present invention relates to an electric circuit board that is based on a metal substrate with excellent heat dissipation characteristics and strength characteristics, and which prevents terminals from protruding, and the purpose of this invention is to securely and firmly attach the terminals to a conductive circuit. .

In electrical circuit boards with such a configuration, since the terminals cannot be brought into contact with the metal board, conventionally the bases of the terminals were simply placed on the conductive circuit and fixed by soldering. Since the terminal was attached with a chisel, it had the disadvantage of being inferior in strength.

The present invention was devised in view of these drawbacks, and the following is the first part.
This will be explained according to the embodiment shown in the drawings and FIG.

In the figure, reference numeral 1 denotes a metal substrate made of an aluminum plate or the like having excellent heat dissipation and strength, and an insulating substrate 2 of the same thickness is attached to one end surface of the metal substrate.

Reference numeral 3 denotes an insulating top plate coated on the metal substrate 1 and the insulating substrate 2.

4, 4... are conductive circuits made of copper foil or the like printed in a pattern on the insulating surface plate 3, and electrical components such as capacitors, resistors, and semiconductor elements are fixed via solder (not shown). be done.

5, 5, . . . are terminal mounting pieces included in the conductive circuit 3, and are arranged on the insulating top plate 3 above the insulating substrate 2.

6, 6, . . . are terminals having a U-shaped clamping portion 6a at the base, and the U-shaped clamping portion 6a is sandwiched between the upper surface of the terminal mounting piece 5 and the lower surface of the insulating substrate 2, respectively, and solder is applied to the terminals. It is fixed to the terminal attachment piece 5 through the terminal attachment piece 5.

(Although the illustrated terminals 6 are soldered while being connected via the connecting pieces 7, it goes without saying that they are separated after soldering.

) As described above, the electrical circuit board of the present invention comprises a metal substrate, an insulating substrate attached to the end surface of the metal substrate, an insulating top plate covering the metal substrate and the insulating substrate, and an insulating top plate disposed on the insulating top plate. and a terminal protruding outward from the insulating substrate and having a U-shaped clamping portion at the base that holds the conductive circuit surface and the insulating substrate, It is now possible to attach terminals with U-shaped clamping parts even to electric circuit boards based on metal substrates, and the terminals can be attached with high strength without sacrificing the good heat dissipation characteristics and strength characteristics that are the characteristics of metal substrates. was able to improve.

[Brief explanation of drawings]

Figures 1 and 2 show an embodiment of the present invention.
The figure is a perspective view of the terminal in an exploded state, and FIG. 2 is a sectional view of the terminal in an attached state.

Claims (1)

[Scope of utility model registration request] a metal substrate and an insulating substrate attached to an end surface of the metal substrate;
It has an insulating top plate covered on a metal substrate and an insulating substrate, a conductive circuit disposed on the insulating top plate, and a U-shaped holding part at the base that holds the conductive circuit surface and the insulating substrate. An electrical circuit board comprising terminals protruding outward from an insulating board.