JPH02136759A - Inspecting device for wiring of printed board - Google Patents

Abstract

PURPOSE:To perform the printed board wiring inspection in a short time and with a high quality by executing the movement in the X and the Y axis directions and the up-and-down motion of a needle by sending a signal from a controller, and measuring an electric resistance value of a measuring piece which comes into contact with each needle tip. CONSTITUTION:A substrate base material 4 is installed between downward spring-contained pins 1a, 1c and an upward spring-contained pin 1b, and by a signal outputted from an X-Y axis controller 8, a pin 1 is moved to a position of both ends of a wiring 5. Subsequently, by a spring-contained pin supporting tool 6, a needle 2 of a contact part of the pin 1 is brought into contact with the wiring 5, a resistance value of both ends of the wiring is measured by a conduction inspecting machine 7, and the pin 1 is returned to its original position, and moved to a different wiring position. When this work is repeated and the quality is inspected with regard to all the wirings, wiring information is outputted from the controller and the needle is positioned exactly, therefore, the inspection of a high quality can be executed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a wiring inspection device for printed circuit boards used in electronic equipment.

BACKGROUND OF THE INVENTION In recent years, printed circuit board wiring inspection equipment has become increasingly important as printed circuit boards are produced in small quantities with a wide variety of products and delivery times are shortened.

An example of the conventional printed circuit board wiring inspection apparatus described above will be described below with reference to the drawings.

FIG. 3 is a schematic cross-sectional view of a conventional double-sided printed circuit board wiring inspection device. In the figure, ■ is a spring-loaded pin, and 2 is a needle at the contact portion of the spring-loaded bottle 1. 4 is a substrate base material, and 5 is its conductor wiring. 7 is a continuity tester, 12 is a spring bottle 1
This is a signal line coming out from the , and is used to measure resistance.

Further, 13 (13a, 13b) is a spring-loaded bottle support jig.

The number of spring-loaded pins 1 is two to three times as many as the number of wiring lines 5 on the printed circuit board, and is attached downward to the supporting jig 13a of the spring-loaded pin at both ends of the wiring lines 5. In the case of a double-sided printed circuit board, one side of both ends of the wiring 5 may be the bottom surface, and in that case, the pins on one side are attached to the spring-loaded pin support jig 13b facing upward. A signal line 12 is connected from each spring-loaded pin 1 to a continuity tester 7.

The operation of the printed circuit board wiring inspection apparatus configured as above will be explained.

A printed circuit board is placed between the support jig 13a for the downward spring loaded pin 1 and the upward spring loaded pin support jig 13b. Then, the support jig 13 for the spring-loaded pin 1 is brought close to the printed circuit board. Then, the needle 2 of the spring-loaded pin 1 comes into contact with both ends of the wiring 5. Here, the electrical resistance value at both ends of the wiring 5 is measured by the continuity tester 7, and its quality (whether or not it is disconnected) is determined.

Problems to be Solved by the Invention However, the above configuration requires at least twice the number of spring-loaded pins as the number of wires, and it takes time to create the device. The problem was that it could not be shipped due to its high quality.

In view of the above-mentioned problems, the present invention provides a printed circuit board wiring inspection device that can perform printed circuit board wiring inspection in a short time and with high quality.

Means for Solving the Problems In order to solve the above problems, the printed circuit board wiring inspection device of the present invention moves one or more needles facing each other and the positions of the needles on the X and Y axes. It is composed of mechanical means such as multiple motors and guide rails for moving the needle up and down, and mechanical means such as a cylinder for moving the needle up and down.The needle is moved in the X-axis and Y-axis directions by signals sent from these control devices. The vertical movement of the probe is controlled, and the electrical resistance value of the measurement piece in contact with each needle tip is measured.

Effect of the present invention With the above-described configuration, wiring inspection of various printed wiring boards can be carried out with one device, and the needle of the bottle into which the spring is inserted can be
It only takes one book or three, making it very inexpensive.

Furthermore, by outputting the wiring information of the printed wiring board from the control device, the accurate position of the needle of the spring-loaded pin can be determined, making it possible to perform high-quality inspection.

EXAMPLE Hereinafter, a printed circuit board wiring inspection apparatus according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic cross-sectional view of a printed circuit board wiring inspection apparatus according to an embodiment of the present invention. In the figure, 1 is a spring-loaded pin, and 2 is a needle in contact with the spring-loaded pin l. 3 is a solder resist, 4 is a substrate base material, and 5 is a wiring. 6 (6a
, 6b, 6c) are spring loaded pin supports. this is,
It has mechanical parts such as a cylinder that moves the spring-loaded pin 1 up and down. 7 is a continuity tester, and 8 is an X-Y axis control device. The spring-loaded pin l has two spring-loaded pins fa and IC installed downward, and is attached to spring-loaded pin supports 6a and 6C, respectively.

Another spring-loaded pin 1b is installed facing upward, and is also attached to a spring-loaded pin support 6b below the spring-loaded pins la and lc.

A double-sided printed circuit board is installed between the downward spring-loaded pins la and lc and the upward spring-loaded pin 1b. The three spring-loaded pins 1a, 1b, and the IC are each connected to a continuity tester 7 by a signal line.

In addition, the parts that control each spring-loaded pin 1aSlb, the movement of the IC to the X axis, the Y axis, and the vertical movement are the second parts.
This will be explained with a diagram.

In FIG. 2, 9 is an X and Y axis control section. 10 is an X-axis guide rail, and 11 is a Y-axis guide rail.

The X-axis guide rail 10 is fixed, and the X and Y control section 9 has a motor and mechanical parts.
Move above 0.

The Y-direction control of the X- and Y-axis control section 9 is performed by moving the Y-axis guide rail 11 attached to the X- and Y-axis control section 9 by operating the motor and mechanical parts of the X-Y-axis control section. done by

In addition, the tip of the Y-axis guide rail 11 has a spring-loaded pin l.
There is a spring-loaded pin support 6 that has mechanical parts such as cylinders that move the pin up and down.

Signals sent to the X- and Y-axis controllers 9 and the support 6 for vertically moving these spring-loaded pins 1 are output from the X-Y-axis controller 8.

The operation of the printed circuit board wiring inspection apparatus configured as described above will be explained.

A substrate base material 4 is installed between the downward spring-loaded pin 1a and the IC and the upward spring-loaded pin 1b.

The honey bottle 1 moves in the X-axis and Y-axis directions according to a signal output from the X-Y axis control device 8, and comes to the positions at both ends of the wiring 5. Next, the spring-loaded bottle 1 is moved toward the substrate base material 4 side by the spring-loaded bottle support 6, and the needle 2 of the contact portion of the spring-loaded bottle 1 comes into contact with the wiring 5.

The resistance value at both ends of the wire is measured by the continuity tester 7, the spring-loaded bottle returns to its original position, and then the spring-loaded bottle 1 is moved to another wiring position. When both ends of the wiring are on the top surface of the board, control is performed using two downward-facing spring bottle needles.

When both ends of the wiring are on both sides of the board, the facing spring jars are controlled one by one.

By repeating the above steps, all wiring can be inspected for quality. In the embodiment, if both ends of the wiring are on the bottom surface of the board, turn the board over.

As described above, according to this embodiment, one or more needles 2 facing each other, mechanical components such as a plurality of motors and guide rails for moving the X-axis and Y-axis positions of the needles, and the needles are provided. It consists of mechanical parts such as cylinders that move up and down, and the signals sent from those control devices
By moving the needle on the X and Y axes and moving the needle downward, and measuring the electrical resistance of the measurement piece that comes into contact with each needle tip, one device can be used for various substrates. It can be inspected at low cost and shipped quickly, and the inspection quality is also high because the position of the needle of the spring bottle is controlled by the electric signal output from the control device.

In the embodiment, a double-sided board was used as an example, but a single-sided board or a multilayer board may also be used. Further, although the spring-loaded bottle has three needles, the number of facing needles may be one or more.

Effects of the Invention As described above, according to the present invention, one or more needles facing each other, and mechanical parts such as a plurality of motors and guide rails for moving the X-axis and Y-axis positions of the tips of the needles, are provided. It consists of mechanical parts such as a cylinder that moves the needle up and down, and the signals sent from these control devices move the needle in the X and Y axes and move the needle up and down, making contact with each needle tip. By measuring the electrical resistance value of the measurement piece, it is possible to test various boards with one device, and the printed circuit board can be shipped cheaply and quickly. Since the position of the needle in the honey bottle is controlled by this method, the inspection quality is high and the practical effect is extremely large.

[Brief explanation of the drawing]

FIG. 1 is a schematic cross-sectional view of a system of a printed circuit board wiring inspection apparatus according to an embodiment of the present invention, FIG. 2 is a perspective view of the entire printed circuit board wiring inspection apparatus according to an embodiment of the present invention, and FIG. 1 is a cross-sectional view of an example system of a conventional printed circuit board wiring inspection device. 1...Bin with spring, 2...Contact part of pin to insert spring, 3...Solder resist, 4...
... Board base material, 5 ... Wiring, 6 ...
・・Spring pin supporter, 7・・Continuity tester, 8・
...X-Y axis control device, 9...XY-axis control unit, IO...X-axis guide rail, 11...Self...Y-axis guide rail. Name of agent: Patent attorney Shigetaka Awano
, (speechless

Claims (1)

[Claims] One or more needles facing each other and the X of the needles
It consists of mechanical means for moving the position of the axis and Y-axis, and mechanical means for moving the needle up and down, and the movement of the needle in the X-axis and Y-axis directions is controlled by signals sent from these control devices. A printed circuit board wiring inspection device characterized in that the needle is moved up and down to measure the electrical resistance value of a measuring part that comes into contact with each needle tip.