JPS62287685A - Construction of printed wiring board - 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] 3. Detailed description of the invention (Industrial application field) The present invention relates to the structure of printed wiring boards for electronic devices.

(Prior Art) Many types of printed wiring boards are used depending on the circuit configuration of the electronic components on which they are mounted, but they generally all have the same external shape. When thinking about it, it is necessary to be able to automatically recognize Type 21 of these printed wiring boards. Conventionally, the method of recognizing the type of printed wiring board is to paste a barcode label at a fixed position on the printed wiring board, and read this barcode label with a barcode reader installed in an automatic electronic component insertion device. A method of self-1211 recognition is generally used.

(Problems to be Solved by the Invention) The structure of the conventional printed wiring board described above uses barcode labels, so creating and pasting the labels is expensive.
In addition, there was a drawback that human error occurred during pasting. Furthermore, due to automatic recognition using barcode labels,
There was an inconvenience that it was impossible for the creator to visually identify it.

The object of the present invention is to eliminate the above-mentioned drawbacks of the prior art, to enable automatic recognition of the type of printed wiring board, and to
Visual identification? Our goal is to provide the complete structure of a printed wiring board.

(Means for Solving the Problems) In order to achieve the above object, the structure of the printed wiring board according to the present invention is such that the structure of the printed wiring board according to the present invention is characterized by the presence or absence of drill holes on the grid at certain positions on the printed wiring board. All type names are coded and all north drill hole groups are provided, and the vertical and horizontal corners of the drill hole group correspond to the drill hole rows, and symbols are printed at the ends of the horizontal rows. There is.

(Example) Next, the present invention will be explained with reference to the drawings.

The figure is a plan view showing the structure of a printed wiring board according to the present invention, and is an example of a printed wiring board for a motherboard provided with coded drill holes used in the present invention.

On the substrate of the printed wiring board 1, a through hole A/2 for mounting electronic components and printed wiring 3 are provided depending on the circuit configuration. Through holes 2 and printed wiring 3 of the printed wiring board 1
T-drill holes 31$4, which are all coded for the type name of the printed wiring board, are provided in a regular manner vertically and horizontally at fixed positions where the printed wiring board is not provided. In the embodiment of the present invention, in order to represent the decimal number indicating the type name of the printed wiring board as a binary code,
The decimal code 1 corresponds to the presence or absence of an OQ drill hole. The embodiment of the present invention has a structure in which four drill holes are provided in the horizontal direction, that is, four bits can be taken. Furthermore, ten drill holes are provided in the longitudinal direction, ie, it is possible to encode 10 types of terms in the longitudinal direction and has the following structure. To explain the drill hole group 4, the first and tenth rows from the top of the horizontal row have special drill holes to represent the beginning and end of coding, that is, four in the - row. A hole is provided.

In the second row from the top, one drill hole is provided at the right end, which corresponds to the decimal number 1.

In the third and sixth rows from the top of the same 41, there is no drill hole, and there is a decimal number O, and in the fourth row, there is a drill hole third from the right, and there is a decimal number O. In the 4th and 5th rows, a drill hole is provided in the third row from the right. The decimal number 2 and the 8th column are:
The first and second drill holes from the right correspond to the decimal number 3, and in the ninth row, the fourth drill hole from the right corresponds to the decimal number 8. .

Further, since the coded drill holes 4 are not plated through-hole, the printed wiring board 1t? Even if you pour solder, the hole will not collapse, and the entire drill hole will be used to create an optically drilled hole code? :'M, by taking,
It is possible to automatically recognize the type name of a printed wiring board. On the right side of each row of the next drill hole group 4, a symbol 5 is displayed corresponding to the coded t-drill hole. This display symbol 5 is printed by silk printing and is displayed by etching copper foil, etc., so that it can be visually recognized. In order to detect the discrepancy between the drill hole and the display symbol, for example, the display symbol 5 is read by the code t on the drill hole optically, and the symbol is matched by an automatic machine based on the code 7. Either the symbol is displayed at the end of the drill hole, or, conversely, the symbol is input into a fully automatic machine and coded to automatically create the drill hole. When the printed wiring board of the present invention configured as described above is sent to an electronic component automatic insertion device, the optical code reading device installed in the device reads the code and drilled holes. The type name of the printed wiring board is automatically recognized.

(Effects of the Invention) As explained above, the present invention provides a T-drill hole in which the type name of the printed wiring board is coded at a certain position on the printed wiring board, so that the electronic component automatic insertion device can be easily inserted. It is possible to provide all printed wiring boards that can automatically recognize the type name of the printed wiring board.In addition, it is possible to make the electronic component automatic insertion device automatically recognize the type of the printed wiring board. Because of this, automation of printed wiring board assembly can be achieved.

Furthermore, since the t symbol corresponding to the drilled hole is displayed at the end of the drilled hole, the type of printed wiring board can be visually identified.

[Brief explanation of drawings]

FIG. 1 is a plan view showing the structure of a printed wiring board according to the present invention. 1...Printed wiring board 2...Through hole for mounting electronic components 3...Printed wiring 4...Coded friend drill hole 5...Display symbol Patent applicant NEC Corporation Agent Patent attorney I Noro Jusai 1

Claims (1)

[Claims] A group of drill holes are provided at certain positions on the printed wiring board, and the type name of the printed wiring board is coded depending on the presence or absence of drill holes on the grid, and drill holes are provided at the ends of the vertical or horizontal rows of the drill hole group. A structure of a printed wiring board characterized by displaying symbols corresponding to columns by printing or etching.