JPS62224Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a printed wiring board that mounts integrated circuit elements having multiple legs in dual in-line package form.

An example of a conventional printed wiring board will be explained with reference to FIG.

Reference numeral 1 denotes a printed wiring board on which a printed circuit (not shown) is formed, and this printed wiring board 1 has a plurality of through holes 2 formed therein. Mounting legs 4 provided on a dual in-line package type integrated circuit element 3 are inserted into the plurality of through holes 2.
Furthermore, a notch 5 is provided at one end of the integrated circuit element 3.
is formed. Furthermore, a pattern 6 having the same shape as the bottom surface of the integrated circuit element 3 is formed in the area where the plurality of through holes 2 are located. A cutout 7 having the same shape as the cutout portion 5 is formed at one end of the pattern 6. The mounting legs 4 are inserted into the plurality of through holes 2 so that the notches 7 and the notches 5 substantially coincide with each other.
In this way, measures have been taken to prevent incorrect insertion of the integrated circuit element 3.

However, with such a configuration, the printed wiring board 1
After the integrated circuit element 3 is soldered, the notch 7 becomes difficult to see, making it difficult to re-inspect the mounting direction. Furthermore, since the same number of mounting legs 4 are provided symmetrically on both sides, mounting is possible even if the mounting direction is incorrect by 180 degrees. As a result, there was a drawback that the integrated circuit element 3 was damaged. Furthermore, when replacing this damaged integrated circuit element with a new one, unlike other discrete components, there are many mounting legs, so a lot of time is spent on the replacement work.

This invention involves inserting the leads of a lead-type component into a through hole formed in the printed wiring board at the portion where the notch at one end of the dual inline package type integrated circuit element placed on the printed wiring board is located. By doing so, it is possible to provide a printed wiring board in which the above-mentioned difficulties and drawbacks are alleviated.

Hereinafter, embodiments of the present invention will be described with reference to FIGS. 2 and 3, in which the same parts as in FIG. 1 are given the same reference numerals.

That is, 1 shown in FIG. 2 is a printed wiring board on which a printed circuit (not shown) is formed, and this printed wiring board 1 has a plurality of through holes 2 formed therein. Mounting legs 4 provided on a dual in-line package type integrated circuit element 3 are inserted into the plurality of through holes 2. Further, a notch portion 5 is formed at one end of the integrated circuit element 3. Furthermore, a pattern 6 having the same shape as the bottom surface of the integrated circuit element 3 is formed in the area where the plurality of through holes 2 are located. A notch 7 having the same shape as the notch portion 5 is formed at one end of this pattern 6.
The mounting legs 4 are inserted into the plurality of through holes 2 so that the notches 7 and the notches 5 substantially coincide with each other. Further, a through hole 8 is formed in the portion where the notch 7 is located. One lead of a lead-shaped component, such as a lead-shaped resistor 9, is inserted into the through hole 8. The other lead is connected to a printed circuit (not shown) at a predetermined position.

According to such a configuration, when one lead is inserted into the through hole 8, the direction of the integrated circuit element 3 can be re-inspected visually. Further, if the integrated circuit element 3 is inserted in the opposite direction as a result of this inspection, it can be easily reinserted in the normal direction since the mounting legs 4 are not soldered. Further, reference numeral 1 shown in FIG. 3 is a printed wiring board on which a printed circuit (not shown) is formed. This printed wiring board 1 is formed only of a plurality of integrated circuit elements 3 of dual in-line package type. Further, a plurality of through holes 2 are formed in the printed wiring board 1. Mounting legs 4 provided on each of the integrated circuit elements 3 are inserted into the plurality of through holes 2 . Further, the integrated circuit element 3
A notch 5 is formed at one end of each.
Further, in the region where the plurality of through holes 2 are located, a pattern 6 having the same shape as the bottom surface of the integrated circuit element 3 is formed.
are formed respectively. A notch 7 having the same shape as the notch 5 is provided at one end of each of the patterns 6.
is formed. The plurality of through holes 2 are arranged so that this notch 7 and the notch portion 5 substantially coincide with each other.
The mounting leg 4 is inserted into. Further, through holes 8 are formed in the portions where the notches 7 are located. Into each of the through holes 8 is inserted a lead-shaped component free-standing terminal 10 having an integrated lead used as a bar check terminal.

According to such a configuration, the freestanding terminal 10
When each integrated circuit element 3 is inserted, the direction of each integrated circuit element 3 can be visually inspected again in the same manner as described above. Moreover, since each of the mounting legs 4 is in an unsoldered state, if incorrect insertion is discovered, it can be easily reinserted into the correct position.

In the above-mentioned embodiment of the present invention, lead-type components such as the lead-type resistor 9 and the free-standing terminal 10 were explained, but it is possible to use not only the lead-type resistor but also other lead-type components attached to the printed wiring board 1. It is obvious that it is also good.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view showing a conventional printed wiring board, and FIGS. 2 and 3 are partially cutaway perspective views showing a printed wiring board according to the present invention. 1...Printed wiring board, 2...Plural through holes, 3...
...Integrated circuit element, 4...Mounting leg, 5...Notch, 6...Pattern, 7...Notch, 8
...Through hole, 9...Lead type resistor, 10...Freestanding terminal.

Claims (1)

[Claims for Utility Model Registration] A printed wiring board with a printed circuit formed on its surface; an integrated circuit element having a notch formed at one end and wired at a predetermined position on the printed wiring board; and the notch. A printed wiring board comprising: a lead type component that is wired to the printed wiring board by inserting a lead into a through hole formed in the printed wiring board in a portion where the wiring board is located.