JPH1065301A - Printed circuit board with check wiring pattern - Google Patents

Abstract

(57) [Problem] To provide a printed circuit board with a check wiring pattern that does not require a check terminal and can shorten the inspection time. A printed circuit board on which a plurality of electronic components including a resistor and a capacitor are mounted, the electronic components are connected by a wiring pattern, and a check terminal for checking an electric signal flowing between the electronic components and the wiring is provided. A check wiring pattern was formed extending from the plurality of places to be checked, and the end of the check wiring pattern was concentrated on the edge of the printed circuit board.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printed circuit board having a check terminal, and more particularly to a printed circuit board for improving an electric circuit check operation.

[0002]

2. Description of the Related Art FIG. 3 is a plan view showing an example of an electronic component mounted on a printed circuit board 1. For example, 2 indicates a resistor, 3 indicates a capacitor, and 4 indicates a relay. A wiring pattern (not shown) for connecting these electronic components to perform a predetermined operation is formed on the printed circuit board.

[0003] TP ₁ to TP ₁₀ is a check terminal for electrical signals flowing between the electronic components mounted on the printed circuit board to check whether they are maintained in a predetermined range, for example, defective products in the assembly site It is used for checking and for checking which electronic component has gone down at the time of maintenance or failure. These check terminals are used together with the electronic components at the time of assembly to make the
Mounted on

[0004]

The electric signals flowing between the electronic components are checked while a probe of an electric measuring instrument or the like is in contact with each part. Must read the instruction of the measuring instrument, and the measurement unit is AC, DC current, AC, D
C voltage, resistance value, etc., so it is necessary to switch the type (or knob) of the measuring instrument every time,
There was a problem that skill and man-hours were required.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems. A plurality of electronic components including a resistor and a capacitor are mounted, and these electronic components are connected by a wiring pattern. In a printed circuit board having a check terminal for checking an electric signal flowing between the electronic components and wiring, a check wiring pattern is formed extending from the plurality of places to be checked, and an end of the check wiring pattern is formed. The present invention is characterized in that it is arranged concentrated on the edge of the printed circuit board.

[0006]

FIG. 1 is a plan view showing an example of an embodiment of the present invention. In the figure, the same elements as those of the conventional example shown in FIG. Reference numeral 6 denotes a check pattern, which corresponds to a check terminal indicated by 5 in FIG.
The check pattern 6 is printed simultaneously with the pattern design between the electronic components on the printed circuit board, and is printed simultaneously with the wiring of other parts formed on the printed circuit board 1. Reference numerals 7 denote cutouts formed on both sides of the check pattern 6, which function as position control at the time of connector connection described later.

FIG. 2 is an enlarged view of a main part of the printed circuit board 1 shown in FIG. A connector 10 to which a ribbon cable 11 is connected is inserted into the check wiring pattern, and the other end of the ribbon cable 11 is connected to an electric measuring instrument 13 via a connector 12. This electric measuring instrument 13 has a measuring function of, for example, AC / DC voltage / current and resistance, a changeover switch 14 and a display unit 15.
Rotating the selector switch TP ₁ connected to to TP ₁₀ are sequentially performed, and is configured so as be able to check the respective locations.

In the above configuration, the connector 10 is inserted into the check pattern 6 along the notch 7 formed on the printed circuit board 1 to enable connection to the conventional check terminal, and the changeover switch is changed. When rotated, the check points are sequentially switched to the check points TP ₁ to TP ₁₀ , and the electric signals at the respective points are sequentially displayed on the display unit 15.

The check wiring pattern may be formed at any position on the edge of the printed circuit board 1 as long as the wiring is simple and does not hinder the attachment and detachment of the connector. . Further, the restricting means for inserting the connector 10 is not limited to the notch, but may be, for example, a convex portion.

[0010]

As described above in detail, according to the present invention, the end of the check wiring pattern is concentrated on the edge of the printed circuit board, so that the check terminal conventionally required becomes unnecessary. Inspection time can be reduced. And so on.

[Brief description of the drawings]

FIG. 1 is a plan view showing an example of an embodiment of the present invention.

FIG. 2 is a plan view showing a state where a main part of FIG. 1 is enlarged and connected to an electric measuring instrument.

FIG. 3 is a perspective view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Printed circuit board 2 Resistance 3 Capacitor 4 Relay 5 Check terminal 6 Check wiring pattern 7 Notch 10, 12 Connector 13 Electric measuring instrument 14 Changeover switch 15 Display part

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Hideo Takeuchi 2-9-132 Nakamachi, Musashino-shi, Tokyo Inside Yokogawa Electric Corporation

Claims (3)

[Claims] 1. A printed circuit board on which a plurality of electronic components including a resistor and a capacitor are mounted, these electronic components are connected by a wiring pattern, and a check terminal for checking an electric signal flowing between the electronic components and the wiring is provided. Wherein a wiring pattern for checking is formed extending from the plurality of places to be checked, and an end of the wiring pattern for checking is arranged concentrated on an edge of the printed circuit board. With printed circuit board. 2. The printed circuit board with a check wiring pattern according to claim 1, wherein the check wiring pattern and a measuring instrument for measuring the value of the electric signal are connected via a connector. 3. A printed circuit board with a check wiring pattern according to claim 1, wherein a guide is provided at an edge portion of said printed circuit board for aligning said connector with said check wiring pattern.