JPS5812470Y2 - printed wiring board - Google Patents

Description

[Detailed description of the invention] The present invention relates to printed wiring boards, and in particular, due to the electrical characteristics of the parts mounted in the circuits of Print 1 to wiring boards, some boards that are normally used as consumer boards may not be suitable for use. This invention relates to the improvement of a printed wiring board constructed by fitting a different type of substrate, such as a glass epoxy substrate, a ceramics substrate, or an aluminum substrate, to the occupied portion to obtain various electrical characteristics when the electrical properties are not available. .

Recently, when various characteristics such as electrical, heat resistance, insulation resistance, etc. are required in some parts of phenolic resin printed wiring boards used as consumer boards, A method has been implemented in which the device is constructed by fitting different types of substrates made of materials necessary to obtain various characteristics such as electrical, heat resistance, and insulation resistance.

When fitting a different type of board to the printed wiring board, as shown in the first figure, a fitting having a shape corresponding to the outer shape of the different type of board 2 to be fitted onto the required portion of the printed wiring board 1 is used. A fitting hole 3 is drilled, and a different type of substrate 2 is inserted into this fitting hole 3.
After configuring by fitting the printed wiring board 1
The dissimilar substrate 2 is fixed to the printed wiring board 1 by soldering or the like or by attaching parts (not shown) to the circuit terminals 4 of the dissimilar substrate 2 and the circuit terminals 5 of the dissimilar substrate 2.

However, the fitting hole 3 has a shape corresponding to the outer shape of the different substrate 2.
When drilling a reciprocal fitting hole 3 that can be tightly fitted without any gaps between the outer peripheries of a different substrate 2 at all times, it is not suitable for industrial productivity. As described above, a structure is required that can hold the foreign substrate 2 so that it does not fall off from the printed wiring board 1 until it is completely fixed in the fitting hole 3 of the printed wiring board 1.

Therefore, the present invention provides the following steps when fitting the necessary different type of board 2 to the basic printed wiring board 1 at the required position.
By providing a rounded corner at the corner of the fitting hole 3 formed in the printed wiring board 1, and by making the corner of the different type of board 2 fitted into the corner part approximately a right angle, the different type of board 2
Even if there is an error between the external dimensions of the fitting hole 3 and the internal diameter of the fitting hole 3,
Regardless of slight errors, the different type of board 2 can be held against the printed board I/wiring board 1 without any hindrance to the work process until it is completely fixed by connecting the circuit between them or fixing the parts. In addition, the process of drilling the fitting holes has been simplified and improved so that it can be implemented industrially.

Embodiments of the printed wiring board of the present invention will be described in detail below with reference to the drawings.

11 is a printed wiring board, and 12 is a different type of board that fits into the fitting hole 13 of this printed wiring board 11.

Each corner 1 of the fitting hole 13 of the printed wiring board 11
3a is provided with a rounded portion 14, and each corner of the different substrate 12 is formed into a substantially right-angled corner 15.

Further, the vertical and horizontal inner dimensions L1. L2 is configured to correspond to the vertical and horizontal outer dimensions l L l 2 of the foreign substrate 12 to be fitted into this, and the radius 14a of each radiused portion 14 of the fitting hole 13 is shown in FIG. 2C. Like a different kind of board 1
Both sides 15a of each corner 15 of 2.

15b and a radius on the arc line inside the intersection 15C.

Therefore, by fitting the dissimilar substrate 12 into the fitting hole 13 of the printed wiring board 11, each corner 15 of the dissimilar substrate engages with the rounded portions 14 at the four corners of the fitting hole 13 while biting into them. Therefore, the different type of substrate 12 can be securely fixed at a desired position on the Benont wiring board 11.

That is, the fitting hole 13 of the printed wiring board 11 is configured such that its vertical and horizontal inner dimensions Ll and L2 correspond to the vertical and horizontal outer dimensions 11 and 12 of the different substrate 12, and each corner 13a is Since the rounded portion 14 is formed by the sides 15a, 15b of each corner 15 of the dissimilar substrate 12 and the radius 14a on the arc line inside the intersection 15C of both sides, the dissimilar substrate 12 is inserted into the fitting hole 13. Intersection 15C of each corner 15 of different substrates 12 when mated
is the fitting hole] 3, so that when these are forcibly fitted, the intersection 15C of each corner 15 of the dissimilar substrate 12 will fit into each radius of the fitting hole 13. It is engaged and fixed while biting into the portion 14.

Therefore, the different substrate 12 has a fitting hole 1 at each corner 15 thereof.
3 is firmly fixed at a desired position on the printed wiring board 11 by the state of engagement with each of the rounded portions 14.

In the above embodiment, the case where rectangular different substrates 12 are fitted is shown, but instead of this,
A heterogeneous substrate having a rectangular shape, a polygon such as a triangle, a pentagon, etc., a heterogeneous substrate having a circular shape, an ellipse, the above-mentioned triangle, or various shapes similar to other polygons, and having at least two opposing corners. For the fitting hole, a radiused portion formed by a curved line inside the left and right sides of the corner of the different type of substrate and the intersection thereof is provided at a position corresponding to the corner of the different type of substrate, thereby achieving the above embodiment. This can be carried out while obtaining the same effects.

In the case of FIG. 2, the configuration is shown in which the above conditions are met at all corners of both the rectangular dissimilar substrate 12 and the fitting hole 13, but FIG. a
, l), the right angle portions 12 are provided only at two corresponding locations.
1 and a rounded part 131 are provided, and the other corner parts are simply configured with a corresponding rounded shape.
It goes without saying that the process can be carried out in the same manner even if the substrate 122 is of a triangular shape, and FIGS. The fitting hole 132 of the printed wiring board 110 has an internal dimension corresponding to the external dimension of the different substrate 122.
2 and the corners corresponding to both the top 123 and the corner 124 of the dissimilar substrate 122 are provided with the top 12.
3 and both left and right sides 123 of the corner 124 a j23
b , 124 a j24 Intersection point 12 of b and its both sides
R 133a, 1 on the inner arc line than 3c, 124c
Fig. 6 a, l) shows an example in which the structure is constructed by providing rounded portions 133 and 134 formed by 34a.
In this case, an embodiment is shown in which an elliptical dissimilar board 125 is fitted onto the printed wiring board 111. A fitting hole 135 having an internal dimension corresponding to the external dimension of the fitting hole 135 is provided, and rounded portions 136 and 137 are provided at the upper and lower portions of the fitting hole 135 at positions corresponding to the obtuse angle portions 126 and 127 of the different substrate 125. For example, the radius 136 of the acute corner 126.127
a , 137 a is the obtuse angle part 126 of the different substrate 125 ,
127 (7) Both sides 126 a , 126 b , 1
27 a.

127b and the intersection points 126C and 127C of both sides, and is formed by the arch line-hi radius.

Furthermore, the embodiment shown in FIG. 7 shows an embodiment in which a hexagonal dissimilar substrate 128 is fitted onto the printed wiring board 112,
Acute angle portions 129 and 14 are provided at upper and lower opposite corners of the different substrate 128.
0, and the printed wiring board 112 has a different type of board 128.
A fitting hole 138 with internal dimensions corresponding to the external dimensions of
Both sides of 29,140 129 a j29b , 140
a, 140 b and the intersection of both sides 129 C, 1
Arch line inside 40C - Hi no R 139 a, 14
This is an example in which the structure is constructed by providing rounded portions 139 and 141 formed by 1a.

It should be noted that the above embodiments can also be applied to different types of substrates having shapes other than those specifically illustrated.

In addition, in the above embodiment, it is not necessary to form corners other than the corners of the different substrate necessary for implementing the present invention with obtuse or acute angles, but rather to fit into the fitting holes of the printed wiring board. From the point of view of assembly, forming a rounded shape with rounded corners has the advantage of not only making fitting easier, but also making it easier to process each corner of different types of substrates.

Therefore, it is preferable to configure a different type of board with the minimum number of opposing corners, but considering the fit state in the fitting hole, it is possible to increase the number of corners on the printed wiring board by increasing the number of corners on the different type of board. This has the advantage of making the fitting state stronger.

Now, the present invention is based on the above-mentioned structure, and is formed in a shape that allows a different type of board to be securely fixed to the fitting hole of the printed wiring board, and also allows both to fit tightly into each other. Even if there is no difference between the outer dimensions of the different substrate and the inner dimensions of the fitting hole, the difference between the outer dimensions of the different substrate and the inner dimensions of the fitting hole can be absorbed by the corner of the different substrate relative to the rounded part of the fitting hole. There was a drawback that the external shape did not match the internal shape of the fitting hole, and if it was particularly small, it would fall out from the fitting hole of the printed circuit board 1-wiring board even if it was fitted. This can be implemented while also solving the problem.

Moreover, even in the work of fitting a different type of board into the fitting hole,
Since the corner of the different type of board is inserted into the rounded part of the fitting hole and engaged, it can be carried out while confirming that the different type of board is firmly fitted and fixed in the fitting hole. However, as in the conventional case, the work is simply done by simply fitting the fitting into the fitting hole, in other words, the firm judgment of the fitting condition cannot be confirmed from the fitting condition. You can perform the work of fitting a different type of board onto a printed wiring board without any anxiety.
This has the advantage of simplifying and speeding up the work.

In addition, the stable fitting state in which a different type of board is engaged by biting the corner of the different type of board into the rounded part of the fitting hole replaces the unstable fitting state of a different type of board to the conventional printed wiring board, and the subsequent printed wiring This has the advantage that work such as solder connection between circuit terminals between a board and a different type of board or work such as mounting of parts can be carried out accurately without fear of defects due to displacement or falling off of the different type of board.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing a conventional embodiment, Fig. 2.3, 4゜5
．． Figure 6.7 shows an embodiment of the present invention, where Figure 2a is a plan view of the printed wiring board, and Figure 2C is an enlarged plan view of the rounded part of the fitting hole, with some parts omitted. FIG. 2 is a plan view of a different type of board, FIG. 3 is a plan view of a printed wiring board with a different type of board fitted, with some parts omitted, and FIGS. 4a, 5a, and 6 Figures a and 7a are plan views of different types of substrates, and Figures 4b, 5b, 6b, and 7 are plan views showing fitting holes of the printed wiring board. ljl, 110, 111, 112 are printed wiring boards,
2,12゜122j25,128 is a different type of substrate, 3,13
, 132, 135j38 is a fitting hole, 14, 131.13
3,134,136,137,139,141 are rounded parts, 15j21, 124 are corner parts, 123 is the top part, 126
j27 is an obtuse angle part, and 129 and 140 are acute angle parts.

Claims (3)

[Scope of utility model registration request] (1) Drill a fitting hole at the required position on the printed wiring board,
In a printed wiring board constructed by fitting a different type of board into the fitting hole, - the different type of board is provided with at least two opposing corner portions, and the fitting hole has inner dimensions corresponding to the outer dimensions of the different type of board. It is constructed by drilling a hole, and providing a rounded part formed by a radius on an arch line inside the left and right sides of each corner and the intersection thereof at a position corresponding to each corner of the dissimilar substrate, When the above-mentioned different type of board is fitted into a printed wiring board, the above-mentioned corner of the different type of board can be engaged with the above-mentioned rounded part of the fitting hole by biting it into the printed wiring board. substrate. (2) The printed wiring board according to claim 1, which is a registered utility model, characterized in that rounded portions are formed at three or four corners of the fitting hole. (3) The printed wiring according to claim 1 of the utility model registration claim, characterized in that a rounded portion is formed on at least one of the top and bottom sides of the fitting hole when the different substrate is triangular. substrate.