JPH0291585A - Inspection device for package printed board - Google Patents

Abstract

PURPOSE:To accurately decide whether or not the printed board is normal by fitting a lower plate having a detection pin which make contact with and leaves the printed board in a fixed state by the up-down movement of a cylinder, etc., on the upper plate to which the lower plate is fitted movably. CONSTITUTION:The lower plate 63 is fitted to the upper plate 61 fixed to the up-down moving plate 5 across a frame plate 62, and the detection pin 63a contacts a specific detection point. Namely, the degree of threadably engagement of the screw 62a of the frame plate 62 is adjusted to move the lower plate 63 right before the up-down moving plate 5 moves down and the detection pin 63a contacts a pattern, thereby positioning the detection pin 63a at the specific detection position. Consequently, the upper and lower detection pins 63a contact specific pattern detection points of the both-surface printed board 3 properly to decide whether the printed board is normal or not.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for inspecting pattern bridging on a printed circuit board on which electronic components are mounted, defects in mounted electronic components, and the like.

[Conventional technology]

Conventional inspection devices of this type have a number of detection pins implanted toward the top surface that contact the pattern of the printed circuit board, and a plurality of positioning pins that fit into positioning holes provided in the printed circuit board. Some have been planted.

To perform an inspection using this inspection device, fit the positioning hole of the printed circuit board into the positioning pin, align the pattern of the printed circuit board with the detection pin, and then move the printed circuit board to the detection pin side. Press the pattern and the detection bottle into contact, apply voltage to the pattern from the desired detection bottle, flow the voltage and current of each part of the pattern through the detection bottle to an inspection circuit incorporating a computer, and create a bridge between the patterns. and inspects for defective parts.

[Problem to be solved by the invention]

By the way, in the conventional inspection device described above, the detection pins are placed on the side of the positioning pins that position the printed circuit board, so if the printed circuit board is positioned using the positioning pins, the pattern on the printed circuit board and the detection bin can be easily detected. The position will not shift. However, when inspecting a printed circuit board with patterns formed on both sides, the detection bins must be placed on the top and bottom surfaces of the printed circuit board. However, there is a slight positional deviation between the detection bin on the unpositioned side and the pattern.

In recent years, as packaging density has increased and the width between patterns has become extremely narrow, a problem has arisen in which even the slightest deviation mentioned above causes the detection bin to deviate from the desired pattern, making inspection impossible. .

The present invention is intended to solve the above-mentioned problems, and its purpose is to attach the detection bin on the side where the printed circuit board is not positioned, of a pair of detection bins arranged with a printed circuit board in between, to the printed circuit board. On the other hand, it is an object of the present invention to provide an inspection device for a mounted printed circuit board, which is movable so that each of a pair of detection bins arranged on both sides of the printed circuit board comes into contact with a predetermined pattern.

[Means to solve the problem]

The present invention aims to achieve the above-mentioned object, and its means include a lower stand on which a double-sided printed circuit board is positioned and fixed, and a detection bottle is configured so that a detection bottle contacts a predetermined detection point of a pattern on the back side of the printed circuit board. The upper plate attached to the vertically movable plate that moves up and down with respect to the lower base, the frame plate fixed to the upper plate, and the degree of screwing of the screw inserted into the frame plate and screwed to the frame plate. and a base configured such that the detection bin is movable and comes into contact with a predetermined detection point of the pattern on the upper surface side of the printed circuit board.

[Effect]

In the inspection device for a mounted printed circuit board according to the present invention, a detection bin is brought into contact with the lower surface of the printed circuit board in a state where the printed circuit board is positioned and fixed in a positioning bin installed on the upper surface of the lower stand, and, on the other hand, the detection bin is positioned with the lower stand. A lower plate having a large number of detection bottles is attached to the lower surface of the base so as to be movable with respect to the base, and by lowering the base, the detection bins on the lower plate come into contact with predetermined pattern positions on the printed circuit board. .

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings.

Fig. 1 is a perspective view of the entire inspection device, Fig. 2 is an exploded perspective view of the main parts, and Fig. 3 is a sectional view of the same.
Reference numeral 1 denotes a main body of the testing device, and a testing circuit connected to a lead wire pulled out from a detection bin is housed in a lower base 1a. A lower stand 2 constituting the inspection device is attached to this lower stand 1a, and a double-sided printed circuit board 3 is positioned and fixed thereon. On the other hand, the upper stage l of the inspection device main body 1
A vertically movable plate 5 which is moved up and down by a cylinder 4 or the like is attached to b, and an upper stand 6 constituting an inspection device is attached to this vertically movable plate 5 so as to be freely insertable and removable.

Next, details of the inspection device will be explained with reference to FIGS. 2 and 3.

Reference numeral 2 denotes a lower stand fixed to the lower stand 1a of the inspection apparatus main body 1, on which a large number of detection bottles 2a are implanted in contact with the pattern on the door surface of the double-sided printed circuit board Fi3. Note that the detection bottle 2a is configured to come into elastic contact with the pattern by a built-in spring. Also, lower stand 2
Positioning bins 2b (four in the figure) are installed at positions corresponding to the positioning holes 3a formed in the printed circuit board 3, and guide walls 2c are formed near each positioning bin 2b. There is. Further, a connector pin 2d is attached to the side of the lower stand 2, and is connected to a connector pin 63c of the upper stand 6, which will be described later, by elastically contacting the connector pin 2d. This connector pin 2d has a built-in spring, and this spring always urges the connector pin 2d upward.

The lead wire connected to the lower end of the connector bin 2d and the lead wire from the detection bin 2a are connected to a test circuit in the lower stand la of the test device main body 1.

Note that the pair of left and right guide holes 2e are the guide holes 6ib of the upper table 6.
The tip of the tube is inserted. Moreover, 3b is an electronic component soldered to the printed circuit board 3.

Reference numeral 6 denotes a base that is attached to the vertically movable plate 5 in the inspection device main body l, and is screwed to a flat upper plate 61, a frame plate 62 fixed to the supranuclear Fi 61 with screws 61a, and the side surface of the frame plate 62. It is comprised of a box-shaped lower stand 63 attached with a screw 62a so that its position can be freely adjusted.

The upper plate 61 is formed with a guide 61b whose tip is inserted into the guide hole 2e of the lower base 2.

Further, the position of the lower plate 63 relative to the frame plate 62 can be adjusted by varying the amount of screw engagement of the screws 62a screwed into the frame plate 62.

Further, on the lower surface of the lower plate 63, a large number of detection pins 63a similar to the detection pins 2a installed on the lower base 2 described above are installed in correspondence with the detection pattern of the printed circuit board 3.
Lead wires 63b connected to the respective detection pins 63a have connector pins 63c implanted in a connector stand 63d fixed to the lower surface of the upper plate 61. The lower end surface of this connector bin 63c is a concave part, and the upper end surface of the connector bin 2d of the lower stand 2 is a convex part, so that when the upper stand 6 is lowered, the connector bin 63c
and the connector pin 2d are positioned and connected by a concave portion and a convex portion.

A method for inspecting the quality of the double-sided printed circuit board 3 using the mounted printed circuit board inspection apparatus constructed as described above will now be described.

First, the printed circuit board 3 is lowered to the lower table 2 along the guide wall 2c of the lower table 2, and the positioning holes 3a of the printed circuit board 3 are fitted into the positioning pins 2b to be fixed. Thereby, the detection pattern on the back surface of the printed circuit board 3 comes into contact with the detection pin 2a of the lower stand 2.

Next, when the vertical moving plate 5 is lowered by the cylinder 4,
The upper stand 6 attached to this vertically movable plate 5 also descends, and the upper plate 6
1 guide 61b is fitted into the guide hole 2e of the lower stand 2,
In this state, the detection pin 63a of the lower plate 63 comes into elastic contact with the printed circuit board 3.

However, when the detection pin 63a comes into contact with the printed circuit board 3, if the lower plate 63 on which the detection pin 63a is installed is fixedly attached to the vertical movement plate 5, even a slight deviation occurs during the attachment. When the detection bin 63 is fixed
a is shifted from the predetermined detection point on the printed circuit board 3,
Detection at a predetermined detection point cannot be performed.

Therefore, in the present invention, the lower plate 63 is attached to the upper plate 61 fixed to the vertically movable plate 5 so as to be freely positionable via the frame plate 62, so that the detection bin 63a comes into contact with a predetermined detection point. I decided to do so. That is, when the vertically moving plate 5 is lowered and the detection bin 63a is just before it comes into contact with the pattern, the frame plate 62
The lower plate 63 is moved by adjusting the degree of threading of the screw 62a, and the detection bin 63a is positioned at a predetermined detection point. In addition,
In this adjustment, whether or not the detection bin 63a is at a predetermined detection point can be determined with a 100-degree view since the vertical movement plate 5 and the upper stand 6 are all made of transparent plates.

After positioning the detection bin 63a on the upper stand 6 in this way, the detection pins 2a and 63a on the lower stand 2 and the upper stand 6 are
By energizing the printed circuit board 3 through lead wires and sending the current and voltage at each part to the test circuit,
The quality of the printed circuit board 3 can be determined.

Hereafter, in the same way as described above, place a new printed circuit board 3 on the lower stand 2.
By setting the cylinder 4 to 1 and lowering the cylinder 4, a pass/fail judgment can be made. Note that the positioning of the lower plate 63 with respect to the upper plate 61 does not need to be adjusted if the printed circuit boards are manufactured by the same Rondo production process.

〔Effect of the invention〕

The present invention is as described above (a lower plate having a detection pin that moves toward and away from a fixed printed circuit board by the downward movement of a cylinder or the like is movably attached to an upper plate to which the lower plate is attached). Therefore, the upper and lower detection pins properly come into contact with the predetermined pattern detection points on the double-sided printed circuit board, so that it is possible to accurately determine the quality of the printed circuit board.

[Brief explanation of the drawing]

The figures show an embodiment of the inspection device for a mounted printed circuit board according to the present invention, in which FIG. 1 is a perspective view of the entire device, FIG. 2 is an exploded perspective view of the inspection device, and FIG. 3 is an assembled state of the same. FIG. 2--Lower stand, 2a--Detection bin, 3--Double-sided printed circuit board, 5--Vertical movement plate, 6--Upper stand, 61--Upper plate, 6
2.-frame plate, 63-lower plate, 63a--detection bottle.

Claims (1)

[Scope of Claims] A lower stand configured such that a double-sided printed circuit board is positioned and fixed, and a detection pin contacts a predetermined detection point of a pattern on the back side of the printed circuit board, and a vertically movable plate that moves up and down with respect to the lower stand. The upper plate attached to the upper plate, the frame plate fixed to the upper plate, and the screws inserted into the frame plate and screwed to the frame plate are moved according to the degree of screwing, and the pattern on the upper surface side of the printed circuit board is moved. An inspection device for a mounted printed circuit board, comprising: an upper stand configured such that a detection pin contacts a predetermined detection point;