JPS59168622A - Electronic part - 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 The present invention relates to an electronic component, and in particular, a terminal is made of a shape memory alloy, and its shape is described in 1. This invention relates to a device that can be fixed to a wiring board based on (a).

Conventionally, when connecting various parts such as electrolytic capacitors to wiring boards, the elasticity of the terminals was used to connect snap-in r+J
110, and fix it to the wiring board by its elastic force, or directly attach the wire drawn from the electronic component to the wiring board, and solder the wire τjL:l.
After that, the unnecessary parts are cut off.

In the former method of fixing by snap-in, the shape must be set according to the size of the electronic component and its connection form, and it is extremely difficult to manage the snap-in shape for each electronic component. Increases the manufacturing cost of parts and the cost of wiring work.

In addition, since the method of 1 & 1 only involves inserting the leads pulled out from the electronic components into the wiring board, the soldering is insufficient at the front, and when soldering,
This may cause inconveniences such as electronic parts falling off or being misaligned. especially,
This method is unsuitable for wiring work using recent automatic insertion machines.

An alloy has been proposed that has a shape memory effect that returns to its original shape when it is mechanically deformed and heat treated after being formed, such as by bending it into a certain shape. An alloy having such a shape memory effect, that is, a shape memory alloy, includes, for example, a N i -'1'' i alloy, which has both good electrical conductivity and a holding force due to shape memory.

In this invention, the terminal is shaped to match the connection form of the wiring board, part or all of it is made of a shape memory alloy, and the terminal is inserted into the wiring board using the property of shape memory.
The purpose is to provide 911 electronic products that can be automatically fixed.

This invention is a 'jf!' mounted on a wiring board. The terminal is processed into a shape that matches the mounting form on the wiring board, and part or all of it is made of a shape 10 alloy, and when this terminal is mounted on the wiring board, it is transformed into a shape that can be inserted. After insertion, temperature treatment is performed to restore the original shape and fix it to the wiring board.

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

FIG. 1 shows an embodiment of the electronic GB product of the present invention.

In the figure, terminals 2.3 are pulled out from both sides and 4i1 parts of the electronic component main body 1, and each 11A4 terminal 2.3
is made of a shape memory alloy such as Ni-'ri alloy or Cu-3n alloy, and its shape is set in advance to suit the mounting form. That is, in this embodiment, the lead-out portion of each terminal 2.3 from the component body 1 is bent at right angles in one direction, and the tip portion thereof is bent at 45 degrees to the opposite side.

If the terminals 2.3 are formed of such a shape memory alloy, each terminal 2.3 can be stretched in a straight line before being inserted into the insertion hole 5.6 of the wiring board 4, as shown in FIG. , the insertion hole 5.
6 from the direction of arrow A. Then, by subjecting each terminal 2.3 to temperature treatment, as shown in FIG.
The shape of the 'i'1 child 2.3 returns to the original shape shown in FIG.
Each terminal 2.3 can be brought into contact with and fixed to the wiring board 4. After doing this, the wiring pattern 7.8 and the terminal 2.3 can be electrically connected after the half [■1 process].

If the terminals 2.3 of the electronic component are formed into a shape according to the desired wiring configuration in this way, they can be inserted into the wiring board 4 in a shape that is easy to insert by utilizing the properties of the shape memory alloy. In addition to making the work easier, each electronic component can be fixed to the wiring board by temperature treatment, and it is possible to prevent electronic components from falling off, being separated from each other, or being misaligned.
It is possible to improve the efficiency of wiring work and the reliability of connections.

4 to 6 show the present invention implemented in an electrolytic capacitor. As shown in FIG. 4, the exterior case 1° in which the electrolytic capacitor element 9 is enclosed is sealed with a sealing plate 11. , 7: l child 13, I4
At the same time, the electrode drawing tabs 15 and I6 drawn out from the electrolytic capacitor element 9 are fixed to the inner surface thereof,
The terminals 13, 14 and the electrode lead-out toughs 15, 16 are electrically connected via the beam head 11. In addition, each terminal 13, I4 is formed of a shape memory alloy as in the previous embodiment, and its shape is adapted to the mounting form, with its tip end pushed approximately 45° toward the opposite side. It is folded in the opposite direction.

With this configuration, the wiring board 4 as shown in FIG.
When inserting into the insertion hole 5.6, each end? -13, I4
It is assumed that the end of the holder is made straight, and in this state it is inserted into the insertion hole 5.6 from the direction of arrow EtlB.

In such an inserted state, each terminal 13, 14 is subjected to temperature treatment at several tens of degrees to over a hundred degrees.
As shown in the figure, each terminal 13.14 can be fixed in its original shape on the surface of the wiring pattern 7.8 (17+S/U) on the wiring board 4.In such a fixed state, solder After processing, the wiring pattern 7.8 has the terminal 1
3.14 can be electrically connected, and even in the case of electrolytic capacitors, displacement and falling off can be prevented as in the above embodiment, and wiring work can be made more efficient.

Although the embodiments of electrolytic capacitors have been described above, the present invention can be applied to electronic parts including transistors, ICs (semiconductor integrated circuits), and various other mechanical parts that can be automatically inserted into wiring boards.

As explained above, according to the present invention, the terminals of electronic components are formed using a shape memory alloy in a shape that conforms to the mounting form.
Insertion into the wiring board is done by deforming it into a shape suitable for insertion, and after insertion, it can be fixed by returning the shape to its original shape by temperature treatment, making it possible to fix it using conventional snap-in terminals, etc.
．． Comparing the two, it is easy to set the shape, and it is possible to omit troublesome work such as half-ifl cutting & J-cutting.
Wiring work is made easier, and a) life and death can be determined.

[Brief explanation of the drawing]

Fig. 1 is a side view showing an embodiment of the electronic component of this invention, Figs. 2 and 3 are explanatory diagrams showing its connection method, and Fig. 4 is a part showing an electrolytic capacitor which is an embodiment of this invention. The sectional view, FIGS. 5 and 6 are explanatory diagrams showing the connection method. 1... Part body, 2.3.13.14... Terminal. Fig. 1 Fig. 2 Fig. 3 Fig. 4 Fig. 5 (B Fig. 6

Claims (1)

[Claims] The terminal to be mounted on the wiring board is bent into a shape that matches the mounting form on the wiring board, and part or all of it is made of shape memory alloy, so that it can be inserted when mounting the terminal on the wiring board. The electronic component is characterized in that after it has been transformed into a desired shape and inserted, it is returned to its original shape by subjecting it to a degree treatment (61).