JPS62103560A - Detection of groove for dividing printed circuit board - Google Patents

Abstract

PURPOSE:To prevent missed carving of a groove, by discriminating whether a disconnection exists between both ends of a line or not after patterns are arranged to enable the detection of a carved groove accurately. CONSTITUTION:A pattern 6 is arranged along both sides of a line to carve a groove 4. This pattern 6 is provided separately from a pattern 5 for an element. Then, it is discriminated whether a disconnection exists between both ends of the pattern 6. In this apparatus, contact pins 7a and 7b for detecting disconnection are connected to the pattern 6 while a contact pin 7 to the pattern 5 separately. The pin 7a is connected to a resistance R through a terminal 11 and the pin 7b the base of switching transistor Tr through a terminal 10 separately. A power source +E is further earthed through an anode and cathode of a light emitting diode 8 and the collector and emitter of a transistor Tr. On the other hand,the power source +E is connected to the resistance R. Then, when a groove 4 is carved into the pattern 6 along the line, the pins 7a and 7b suffer two turn OFF the diode 18. Thus, the carving of the groove 4 can be detected.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a printed circuit board dividing groove detection method.

[Conventional technology]

Generally, for administrative convenience, as shown in Figure 1,
Alternatively, different printed circuit boards may be grouped together and then divided from the standpoint of speed of automatically inserting elements into the printed circuit board 1 and also from the standpoint of convenience in creating an automatic insertion program.

At this time, the holes 2 for inserting the leads of the element are penetrated through the copper foil pattern 5, and at the same time, the holes 3 for dividing the printed circuit board 14 are intermittently penetrated in a row, and along the line 9 with a cutter, As shown in FIG. 5, there is a method in which dividing grooves 4 are carved in a printed circuit board 1 having a substantially V-shaped cross section so that the edges of the cross section are smooth.

In the former case, since the splitting hole 3 is inserted through the lead insertion hole 2 of the element at the same time, no leakage occurs during the insertion.

However, in the latter case, the groove 4 is carved in a separate process after the lead insertion hole 2 of the element is penetrated, which may result in omission of the groove.

Conventionally, therefore, it has been determined and confirmed visually by an operator whether the grooves 4 have been appropriately carved.

[Problem that the invention seeks to solve]

However, according to the above-mentioned visual inspection method by an operator, there are problems in that the grooves 4 are easily overlooked and the grooves 4 are not carved, making it impossible to divide the printed circuit board 1.

SUMMARY OF THE INVENTION The present invention was proposed in order to solve the above-mentioned problems, and it is an object of the present invention to provide a printed circuit board dividing groove detection method that reliably detects whether or not a printed circuit board dividing groove is carved. With the goal.

[Means for solving problems]

The present invention is intended to solve the above-mentioned problems, and is a printed circuit board dividing groove detection method for detecting that a groove having a substantially V-shaped cross section for printed circuit board division is carved on at least one surface of a printed circuit board. In this method, a copper foil pattern is provided on both sides of the line in which the groove is to be carved, and by detecting whether or not there is a disconnection between both ends of the pattern, A method for detecting grooves for dividing a printed circuit board, characterized by detecting whether or not the grooves are carved.

[Function] Next, to explain the function of the present invention, a copper foil pattern is provided on both sides of a line in which a groove for dividing a printed circuit board is to be carved, and whether there is a disconnection between both ends of the pattern or not. By detecting this, it is possible to reliably detect whether or not the groove is carved between both ends of the pattern.

〔Example〕

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments with reference to the drawings.

Figure 1 shows a printed circuit board l used in an embodiment of the present invention.
FIG.

The method of this embodiment is based on the method of the present invention, in which at least one surface of the printed circuit board 1 has a substantially V-shaped cross section as shown in FIG. This is a method of detecting that 4 is engraved.

It goes without saying that the present invention can also be applied to printed circuit boards having copper foil patterns 5 on both sides.

First, a copper foil pattern 6 is provided on both sides of the line 9 in which the groove 4 is to be carved.

This pattern 6 is provided separately from the element pattern 5.

Next, it is detected whether or not there is a disconnection between both ends of the pattern 6.

This disconnection detection device is shown in FIGS. 2(a) and 2(b).

This device is well known and will be briefly described. Contact pins 7a and 7b for detecting disconnection are connected to pattern 6, and contact pin 7 is connected to pattern 5, respectively.

The contact pin 7a is connected to a resistor R via a terminal 11, and the contact pin 7b is connected to a base of a switching transistor Tr via a terminal 10.

The power supply +E is further grounded via the anode and cathode of the light emitting diode 8 and the collector and emitter of the transistor Tr.

On the other hand, a resistor R is connected to the power supply +E.

Here, if the groove 4 is appropriately carved in the pattern 6 along the line 9 as shown in FIG. The diode 8 does not light up, and it is detected that the groove 4 has been appropriately carved along the line 9.

Conversely, if the groove 4 is not carved in the pattern 6 as shown in FIG. 3, or if the groove 4a is carved outside the pattern 6 as shown in FIG. 7
A and 7b become conductive, the transistor Tr turns on, the light emitting diode 8 lights up, and it is detected that the groove 4 is not properly carved along the line 9.

Here, when the light emitting diode 8 does not light up, it may be configured to detect that the groove 4 is not properly carved along the line 9, or it may be detected by sound or the like.This disconnection detection device Of course, there are no limitations.

Through the above steps, it is detected whether or not the groove 4 is carved between both ends of the pattern 6.

〔Effect of the invention〕

As explained above, the present invention provides a copper foil pattern on both sides of a line in which a groove for dividing a printed circuit board is carved, and detects whether or not there is a disconnection between both ends of the pattern. Since it is detected whether or not the groove is carved between both ends of the pattern, the formation of the groove can be reliably detected.

This prevents omission of grooves, reduces returns from printed circuit board users, and contributes to improved yield and productivity.

[Brief explanation of drawings]

FIG. 1 is a plan view of a printed circuit board used in an embodiment of the present invention, FIG. b) is a circuit diagram of a disconnection detection device used in the embodiment method of FIG. 1;
3 is a cross-sectional view of the printed circuit board of FIG. 1 in which no grooves are formed, and FIG. 4 is a cross-sectional view of the printed circuit board of FIG. 1 in which grooves are formed in areas other than both end areas of the pattern. FIG. 5 is a sectional view of a printed circuit board used in the conventional method. 1... Printed circuit board 4... Groove 5.6... Pattern 9... Line

Claims (1)

[Scope of Claims] 1. A printed circuit board dividing groove detection method for detecting that a printed circuit board dividing groove having a substantially v-shaped cross section is carved on at least one surface of a printed circuit board, comprising the steps of: A copper foil pattern is provided as far as possible on both sides of the line, and by detecting whether or not there is a disconnection between both ends of the pattern, it is detected whether or not the groove is carved between both ends of the pattern. A method for detecting grooves for dividing printed circuit boards.