JPS587655Y2 - Parts mounting hole structure - Google Patents

Description

[Detailed explanation of the invention] This invention is used when attaching electronic components to printed circuit boards.
This invention relates to the structure of a mounting hole on a printed circuit board for inserting, fixing, and soldering a terminal or mounting leg of a component.

In the following, electronic components such as diodes will be explained as an example.

FIG. 1 shows the shape of a conventional electronic component mounting hole drilled in a printed circuit board, and FIG. 2 shows a state in which an electronic component is mounted in the conventional electronic component mounting hole.

In Figures 1 and 2, 1 is a conventional electronic component mounting hole;
2 is a printed circuit board, 3 is an electronic component, and 4 is a terminal or mounting leg for the electronic component.

3 and 4 show a state in which a terminal or mounting leg 4 of an electronic component is inserted and fixed into a conventional electronic component mounting hole 1 and soldered, and 5 is the solder applied by soldering.

The electronic component 3 is fixed to the printed circuit board 2 by inserting its terminal or mounting leg 4 into the electronic component mounting hole 1, and is soldered with solder 5.

However, with the shape of the conventional electronic component mounting hole 1 as described above, when the terminal or the mounting leg 4 is in the shape of a thin plate as shown in FIG. It has been difficult to achieve three things: ease of mounting, sufficient fixing of the electronic component 3 to the printing plate 2, and ease of applying the solder 5.

That is, in FIG. 3, if the electronic component mounting hole 1 is large enough to allow the terminal or mounting leg 4 to be inserted easily,
If the electronic component 3 cannot be sufficiently fixed to the printed circuit board 2, and on the contrary, if the electronic component mounting hole 1 is small enough to sufficiently secure the electronic component 3 to the printed circuit board 2,
Since the side surface of the terminal or mounting leg 4 makes strong surface contact with the inner surface of the electronic component mounting hole 1, it has the disadvantage that it is difficult to insert.

In addition, since there is an upper limit to the processing technology for making sufficiently narrow holes in the printed circuit board, Figure 3 a, l).

Another drawback was that the solder 5 did not completely cover the long sides of the rectangular cross section of the terminal or mounting leg 4, as shown in FIG.

Furthermore, in the conventional mounting hole usage state shown in FIG.
Since there is no strong surface contact with the inner surface of the electronic component mounting hole 1, it is easy to insert into the electronic component mounting hole 1 and at the same time it can be sufficiently fixed, but the solder 5 does not adhere very well to the electronic component mounting hole 1.

This idea makes it easy to insert the terminals or mounting legs of the electronic component when attaching the electronic component to the printed circuit board, and allows the electronic component to be sufficiently fixed to the printed circuit board after insertion. Another object of the present invention is to obtain an electronic component mounting hole that simultaneously satisfies these three conditions of good solder adhesion when soldering a mounting leg to a printed circuit board.

FIG. 5 shows an embodiment of the component mounting hole of this invention, and 6 is the newly devised electronic component mounting hole.

FIG. 6 shows a state in which the terminal or mounting leg 4 of the electronic component is inserted and fixed into the new electronic component mounting hole 6 and soldered.

Similarly to FIG. 3, numeral 5 indicates the part on which the solder is applied.

The above-mentioned new electronic component mounting hole 6 differs from the conventional mounting hole in that it has a pair of rectangular holes with their long sides tilted in a V-shape, and as shown in FIG. Or, the mounting leg 4 is twisted into a V-shape and the electronic component mounting hole 6 is
inserted into.

For this reason, electronic components are sufficiently fixed to the printed circuit board,
Moreover, the terminal or the mounting leg 4 does not come into surface contact with the inner surface of the electronic component mounting hole 6 as in the conventional case, so it is easy to insert the terminal or the mounting leg 4.

Furthermore, regarding the solder application in this case, as shown in 5 in Fig. 6, although the designed electronic component mounting hole 6 has a rectangular shape that is sufficiently thick to the extent that it is possible to process the printed circuit board. In good condition.

Next, FIGS. 7 and 8 are explanatory diagrams showing the process of devising the electronic component mounting hole 6 devised above, and 7 is an explanatory diagram showing the process of devising the electronic component mounting hole 6 devised above. This is a component mounting hole.

4, as before, indicates the terminal or mounting leg inserted therein.

The electronic component mounting hole 6 of the present invention shown in Figure 5 has a pair of rectangles tilted in a V-shape, but prior to this, the pair of rectangles were tilted in the same direction as shown in Figure 7. A shaped electronic component mounting hole 7 was also considered.

In this case as well, it appears that the terminal or mounting leg 4 is inserted while being twisted, so that the electronic component is sufficiently fixed to the printed circuit board, and the terminal or mounting leg 4 is in surface contact with the inner surface of the electronic component mounting hole 7. It seems as if it is easy to insert because it is not done.

However, in reality, when the distance between a pair of terminals or mounting legs 4 is inclined to a negative tolerance, the positional relationship between the electronic component mounting hole 7 and the terminal or mounting leg 4 inserted therein is as shown in FIG. As a result, electronic components cannot be sufficiently fixed to the printed circuit board.

The above-mentioned drawbacks can be avoided by forming the electronic component mounting hole in a V-shape as shown in 6 in FIG. 5 or 6.

Next, FIG. 9 shows another embodiment of the present invention, in which the invented electronic component mounting hole 6 is similar to that shown in FIG.
These are a pair of rectangular holes with long sides inclined in a V-shape, and the terminals or mounting legs 4 are inserted here with the four corners biting into diagonal positions of the electronic component mounting holes 6.

For this reason, electronic components are sufficiently fixed to the printed circuit board,
Moreover, the terminal or the mounting leg 4 does not come into surface contact with the inner surface of the electronic component mounting hole 6 as in the conventional case, so it is easy to insert the terminal or the mounting leg 4.

Furthermore, as shown in 5 in Figure 9, solder adhesion in this case is good even though the designed electronic component mounting hole 6 has a rectangular shape that is sufficiently thick to allow processing of the printed circuit board. It is.

The embodiment described above uses a pair of rectangular shaped electronic component mounting holes with long sides inclined in a V-shape. The same effect as shown in Figures 6 and 9 can be obtained by making the shape diagonally dropped or the corners of the rectangle rounded, and also by creating a pair of ellipses whose long axes are inclined in a V-shape. The same effect as shown in FIG. 6 can be obtained by changing the shape of .

Incidentally, in the above description, the case where this invention is used for attaching electronic components to a printed circuit board has been described, but it can also be generally used when joining an article having mounting legs to another article.

As explained above, this invention allows the terminals or mounting legs of the mounting component to be easily inserted into the printed circuit board by drilling a pair of long holes tilted in a V-shape as mounting holes in the printed circuit board.
Moreover, it has the effect of being able to be sufficiently fixed and at the same time to be able to sufficiently apply solder.

[Brief explanation of the drawing]

Figure 1 shows a conventional electronic component mounting hole, Figure 2 shows a state in which an electronic component is installed in a conventional electronic component mounting hole, and Figures 3 a, l), c, and 4 show a conventional electronic component mounting hole. Fig. 5 shows an embodiment of the present invention, and Fig. 6 shows a state in which the terminal or mounting leg of an electronic component is inserted into the mounting hole of the electronic component and is soldered. The terminal or mounting leg of the electronic component is shown inserted and fixed and soldered, FIGS. 7 and 8 show the process of devising this embodiment, and FIG. 9 shows another embodiment of this invention. shows. In the figure, 2 is a printed circuit board, 4 is a terminal or mounting leg, and 5 is a printed circuit board.
is the part with solder, and 6 is the devised part mounting hole. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (4)

[Scope of utility model registration request] (1) A component mounting hole structure characterized in that a pair of long holes are provided on a printed circuit board so that the long sides of the holes are inclined in different directions to form a V-shape. (2) The component mounting hole structure according to claim 1, wherein the elongated holes are a pair of elliptical holes whose long axes are inclined in a V-shape. (3) The component mounting hole structure according to claim 1, wherein the elongated hole is a hole having a rectangular shape with the corners cut down diagonally. (4) The component mounting hole structure according to claim 1, wherein the elongated hole is a rectangular hole with rounded corners.