JPS6267469A - Adaptor for printed wiring board inspecting machine - Google Patents

Abstract

PURPOSE:To obtain a printed wiring board inspection adaptor which enables quick inspection when the density at an inspection point is high and when the pitch is very fine, by using a dedicated board corresponding to a wiring pattern as adaptor. CONSTITUTION:While a strut 102 is fixed on a dedicated board 19 with a screw 106, an adaptor block 100 can be arranged in a desired area between a mesh board 15 and the dedicated board 19 by inserting an adaptor pin 101 into a through hole 14 of the mesh board 15. A connector 110 is preferably used for the connection of the adaptor pin 101 and a probe pin 105 with a wire 104. A probe pin 105 for a highly dense inspection point can be arranged at any position of the specialty board 19 as required.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an inspection machine tail adapter for printed wiring boards.
4! ! This invention relates to an adapter for a general-purpose printed wiring board inspection machine that enables the i to inspect boards mounted in flat packages.

As is well known, conventional printed wiring board inspection machines check the mutual electrical connection relationship between any two terminal areas on each printed wiring board, that is, whether they are in a conductive state or an insulated state. It has the function of inspecting whether the electrical connections are present and identifying those that are not in a normal electrical connection. here,
The condition, parts, and arrangement of the terminal area groups of the wiring patterns that make up the printed wiring board that is the subject of inspection vary widely. This may be due to the fact that Hitotsubashi's printed wiring boards contain a mixture of various lattice-like pinches. Therefore, in principle, a dedicated fixter is required for each printed wiring board to be inspected.

In order to avoid the above problems, in the past, a standard inspection machine equipped with, for example, 2.54 mm pinch grid points was used as a reference, and an adapter was prepared for each type of printed wiring board to be inspected. The inspection of each Dan printed wiring board was performed by selectively replacing the board. Patent application No. 58-1568 filed by the same applicant as the present applicant
The off-grit atta "buta" described in No. 75 A is one of them, and the inspection point is 2.54 mm.
In a general-purpose printed wiring board inspection machine that inspects a printed wiring board with a VC on a grid of 2.54 mm, if the inspection point of the board to be inspected is not a VC on a grid of 2.54 mm, the It was possible to test using pigs with extremely good operability.

However, when there is a high density of inspection points, such as a printed wiring board with a flat package mounted on it, or when the inspection points have a small pinch (for example, Q, 13 mm pitch, etc.) (hereinafter, such cases will be collectively referred to as It was impossible to inspect high-density inspection points (referred to as high-density inspection points) even with the off-grid adapter.

Therefore, in the past, inspection of the high-density inspection board was carried out by the method shown in Figures 4 and 5. It was difficult to commercialize it.

Problems to be Solved by the Invention First, in the conventional example shown in Fig. 4, two dedicated boards are used to keep the tip of the adapter tab vertical; As shown in the figure, it becomes extremely dark. Therefore, since the lower surface of the adapter pin is not uniform, there is a drawback that poor contact tends to occur on the bias steer side of the adapter pin. Also, the adapter pin itself
Since it is thin and has a grooved tip like a spring probe, it has the disadvantage of being very expensive. Additionally, in use, the bottom of the adapter pin is extremely
4.Since it is designed to be inserted into a mesh board etc. at an angle, it is difficult to assemble it, and once it is assembled, it becomes difficult to disassemble it, and it is necessary to assemble it separately for each board. However, it had the disadvantage that it ended up being very expensive.

Next, the prior art shown in FIG. 5 is a device developed by the present inventors, and details of this device can be found in Japanese Patent Application No. 160328/1985 filed by the same applicant as the present application. has been disclosed. That is, the high-density inspection points and the tabular flat package IC bumper parts are unitized as an adapter unit, and spring probe pins corresponding to the high-density inspection points are embedded in the upper pin board of the adapter unit. The probe pin is configured by electrically connecting the probe pin to the probe pin of the fixture, and the adapter unit is detachably attached to the adapter. As a result, accurate and efficient inspection of high-density inspection points has become possible. However, when manufacturing the adapter unit, it is difficult to determine the positional relationship between the dedicated board and the adapter unit, and the adapter unit itself is expensive.

Further, the conventional adapter VC has the following drawbacks. Adapter cables used in FQJ adapters are usually tilted to the horizontal line, so their upper end protrudes long above the dedicated board, as shown in the conventional VC in Figure 3(b). If it were, the inspection point of the printed wiring board to be inspected would be inconvenient because it would be offset by that distance from the center of the through hole of the dedicated board.

The present invention has been made to overcome the above-mentioned drawbacks inherent in the prior art, and therefore, an object of the present invention is to overcome the above-mentioned drawbacks inherent in the prior art. Another object of the present invention is to provide a new means that enables rapid and accurate testing and is highly operable and economical.

Means for Solving the Problems In order to achieve the above object, the adapter for a printed wiring board inspection machine according to the present invention is arranged in a grid pattern in a fixture of an inspection machine and is installed vertically and retractably. a mesh board in which a plurality of first through holes are formed to correspond to the plurality of probe pins, and a second mesh board that is fixed in parallel to the mesh board via a spacer and that corresponds to the wiring pattern of the printed wiring board to be inspected. a dedicated board having a through hole formed therein, a hole to be fitted into the head of the probe pin at the lower end, and a head provided at the F end of the plurality of first and second through holes; a plurality of adapter pins that are selectively and removably inserted into the holes and are in contact with the probe pins; and a plurality of adapter pins are in contact with the probe pins through the first through holes formed in the mesh board. multiple second
an adapter block having adapter pins implanted and fixed and arranged in parallel on the mesh board; and a high-density inspection implanted in the dedicated board and electrically connected to the corresponding other end of the second adapter bin. The point foil 2 is provided with a glove bin.

Embodiment of the Invention Next, a preferred embodiment of the present invention will be specifically explained with reference to the drawings.

FIG. 1 is a perspective view showing one embodiment of the adapter according to the present invention, and FIG. 2 is a schematic sectional view showing one embodiment of the adapter according to the present invention. In the figure, reference number 11 indicates a fixture mounted on the top surface of the inspection machine, and the fixture 1
1, a plurality of probe pins 12 are implanted in a matrix shape at a lattice point pitch of, for example, 2.54 mm, and are expandable and retractable in the vertical direction. Reference number 13 as a whole
The adapter shown in FIG. a dedicated board 19 that is connected and fixed in parallel via spacers 16 and has a plurality of through holes 18 drilled corresponding to the wiring pattern of a printed wiring board 22 to be inspected; A plurality of adapter pins 20 are selectively and detachably inserted into the through holes 14 of the mesh board 15 and the through holes 18 of the dedicated board 19 and connected to the probe pins 12 of the fixture 11.
and a plurality of adapter bins 101 that are connected to the probe pins 12 through the through holes 14 of the mesh board 15.
An adapter block lOO is implanted and fixed and arranged in parallel on the mesh board 15, and an adapter block A is implanted and fixed in the dedicated board 19 and connected to the corresponding adapter bin 101 by wiring 104.
probe pin 1
It has 05H spring properties and is movable up and down. 21 is a substrate guide bin.

The adapter block 100, which is the main part of the present invention, has its support 102 fixed to a dedicated board 19 with a screw 106, and as described above, the adapter bin 101 is inserted into the through hole 14 of the mesh board 15. Therefore, it is possible to arrange it in any desired area between the mesh board 15 and the dedicated board 19. It is desirable to use the connector 110 for the connection Vc between the adapter pin 101 and the globe pin/105cl wiring 104.

Lake 103 is an adjustment screw. Further, the probe pins 105 for high-density inspection points can also be placed at any position on the dedicated board 19 as needed.

Another feature of the present invention is that as the entire adapter 13 moves up and down, the tip head (length F12 mm) 20a of the adapter pin 20 comes into contact with the dedicated board 19, as shown in No. 3 ffl(a)K. Therefore, the distance from the dedicated board 19 to the tip of the adapter bin 20 is short. For this purpose, a spring 107 is provided between the fixture 11 and the menonyu board 15 or a member 111 connected thereto, and a suppressing plate 108 is provided on the upper part of the N1 adapter 13.
The IVC is provided with an abutting frame 109 against which a suppressing plate 108 abuts.

Figure 2 (a) is the state before the inspection! Φ) shows the state during inspection, and when weighing the printed wiring board 22 to be inspected, the printed wiring board 22 is placed on the dedicated board 19 by VC according to the board guide 21. Next, the printed wiring board 22 is pressed by the pressing plate 108 until the plate 108 comes into contact with the abutment 109. At that time, the adapter 13 moves downward against the spring 107, and as shown in FIG.
), the adapter pin 20 and the probe pin 105 are connected to the corresponding probe pin 12 of the n-rn fixture 11 and can be inspected. After the inspection, the press plate 108 is removed. Once done, the adapter 13 returns to its original position as shown in FIG. 2(a).

Effects of the Invention The present invention operates in accordance with the above-described hitting practice, and the present invention produces the following effects.

First of all, it has the effect of quickly and accurately calibrating printed wiring boards with high-density inspection points.
1. A highly versatile printed wiring board inspection machine can be realized easily and economically.

Second, since the spring probe pins 105 for high-density inspection points do not need to be placed directly above the adapter block 100 (the adapter pins 101 of the adapter block 100), that is, facing each other, the adapter block 100 and the probe pins 105 The mounting position can be set to any position as required, making it extremely easy to use and making it easy to prepare.

Thirdly, since the tip head 20a of the adapter bin 20 is configured to come into contact with the surface of the dedicated board 19,
There is almost no gap between the center of the through hole 18 of the dedicated board and the center of the tip of the head 20a, so alignment of the printed wiring board to be inspected is easy and V′C (((
Since the inspection point will surely come into contact with the American glove pin, a precise and rapid inspection can be achieved.

[Brief explanation of drawings]

11A is a cross-sectional view showing an embodiment of the adapter that protects the present invention; FIG. 2 is a schematic cross-sectional view showing an embodiment of the adapter according to the present invention; FIGS. 3(a) and (b) 1 is an explanatory diagram of an adapter pin, and FIGS. 4 and 5 are schematic sectional views showing a conventional example. 11... Fixture, 12... Fist Grofhin, 1
3...Adapter, 14.18.21...ψ through hole, 1
5 fists...Menu board, 16...Hibiki spacer, 191
1.-Dedicated board, 2011-.Adapter pin, 21ψ
... Board guide /, 22 ... Inspected printed wiring board, 100 - ... Adapter block, 1OIII111
Adapter pin, 102... Support, 104... Wiring,
105...Glove bin for high-quality inspection points, 10
7...Spring, 108...Press plate, 109...Holding plate with ψ, 110...Connector, 111...-a box member (b) (a) Third hook

Claims (3)

[Claims] (1) a mesh board in which a plurality of first through-holes are formed corresponding to a plurality of probe pins arranged in a grid pattern in a fixture of an inspection machine and installed vertically and retractably; A dedicated board is fixed in parallel to a mesh board via a spacer and has a second through hole formed therein corresponding to the wiring pattern of the printed wiring board to be inspected, and a hole at the bottom end of which is attached to the head of the probe pin. a plurality of adapter pins formed therein, each having a head at its upper end and selectively and removably inserted into the plurality of first and second through-holes to be in contact with the probe pin; an adapter block in which a plurality of second adapter pins contact-connected to the probe pins through the first through-holes are implanted and fixed and arranged in parallel on the mesh board; and the dedicated board. An adapter for a printed wiring board inspection machine, comprising a second probe pin for a high-density inspection point, which is implanted in the second adapter pin and electrically connected to the corresponding other end of the second adapter pin. (2) The adapter for a printed wiring board inspection machine according to claim (1), further characterized in that the second adapter pin and the second probe pin are connected using a connector. (3) Claims (1) or (2) further characterized in that the entire adapter including the mesh board, the dedicated board, the adapter block, etc. is vertically movable. Adapter for printed wiring board inspection machine.