JPH0438480A - Up and down adaptor for printed wiring board inspecting machine - Google Patents

Abstract

PURPOSE:To easily and accurately perform inspection of a highly densified fine printed wiring board for double-side mounting by arranging a pin support board between a base and a board member. CONSTITUTION:A movable fine adjustment board 7 is provided to a board member 5 constituting off-grid adaptors in order to finely adjust the positional relation between the surface pattern of a printed wiring board 3 to be inspected and adaptor pins 10 and the wiring board 30 is set through the board guide pins 9 provided to the board 7 and the fine adjustment board 7 is finely moved in an arbitrary horizontal direction to carry out fine adjustment and the adaptor pins 10 are brought into contact with the inspection point of the under surface of the wiring board 30 to inspect the wiring state of the printed wiring board. When the board is held between two upper and lower sets of off-grid adaptors, the pin support board 4 between the board 5 and a base 3 are guided by the extremely fine pins 10 and the accuracy of the leading end position thereof is improved and, therefore, the patterns of both surfaces of the board wherein inspection points are highly densified and made fine are easily inspected and inspection can be accurately performed.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an off-grid adapter used in a general-purpose printed wiring board inspection machine, and in particular, to an off-grid adapter used in a general-purpose printed wiring board inspection machine, and in particular, to an off-grid adapter used in a general-purpose printed wiring board inspection machine. a base having a through hole drilled to correspond to the location of the probe;
A board member placed parallel to this base, an adapter pin inserted between the base and the board member, the tip of which contacts the inspection point of the printed wiring board to be inspected, and the base end of which contacts the contact probe of the inspection machine. The present invention relates to an off-grid adapter for simultaneous inspection of both sides of a printed wiring board.

[Conventional technology]

Conventionally, a general-purpose printed wiring board inspection machine has been proposed that inspects the wiring state of a printed wiring board whose inspection points are located on a grid such as a 2.54 mm grid for electrical continuity, poor insulation, and disconnection. This inspection machine uses an off-grid adapter to inspect printed wiring boards that have inspection points outside the grid.

In the case of printed wiring boards (hereinafter referred to as boards) that can be inspected by applying a bottle or contact probe to one side of the printed wiring board to be inspected (hereinafter referred to as a board), there are several types of mini-offs available depending on the size of the board. It is possible to inspect by selecting a grid adapter.

When testing both sides of a double-sided board at the same time, use an off-grid adapter with an adapter pin to test only the bottom side of the board to be tested, and use a spring contact probe to energize the top side to the test points on the board to be tested. The test is carried out using a bin board with seeds planted in it.

[Problem to be solved by the invention]

Inspection points on double-sided mounting boards tend to be more dense and miniaturized, but in this case, the adapter pins that come into contact with the inspection points on the board must be made thinner to support inspection. However, simply reducing the diameter of the rod part of the adapter pin will reduce the bending strength of the adapter pin, which cannot support the inspection of boards with higher density and finer inspection points; There have been problems such as the contact becomes unstable and the electrical inspection of the wiring state on the board cannot be easily and accurately performed.

Furthermore, when inspecting a board for double-sided mounting using the means described in the prior art, different inspection jigs are used for the top and bottom sides of the board, making it troublesome to set and reset on the inspection machine; There have been problems such as the inability to provide inspection jigs at a low price and the relatively high inspection costs.

The present invention has been made in view of the problems of the conventional technology, and its purpose is to be able to handle the inspection of high-density and miniaturized double-sided mounting boards, and to It is an object of the present invention to provide a top and bottom type adapter for a board inspection machine that allows inspection to be carried out easily and accurately.

Another object of the present invention is to provide a top and bottom type adapter for a board inspection machine that is easy to set and reset on an inspection machine that inspects double-sided mounting boards, and that can perform this type of inspection at low cost. There is a particular thing.

Another object of the present invention is to provide a board inspection machine that can finely adjust the position of adapter pins for inspection points on both the bottom and top sides of a board, and that can easily adjust the position to the optimum inspection position. Our goal is to provide upper and lower types of adapters.

Still another object of the present invention is to provide a top and bottom adapter for a board inspection machine that can reduce running costs because off-grid adapters can be selected and changed as appropriate depending on the size of the board, and the operation is simple. The purpose is to provide type.

[Means for Solving the Problems] The present invention provides a base having through-holes formed in correspondence with the arrangement positions of contact probes implanted in a grid pattern in a fixture of an inspection machine; A board member that is arranged in parallel and is fixed to the base via a support that is erected on the base, and a board member that is inserted between the base and the board member and whose tip end is connected to the inspection point of the printed wiring board to be inspected. a first off-grid comprising an adapter pin that contacts and whose base end contacts a contact probe of an inspection machine; and a pin support board disposed between the base and the board member that corrects deflection of the adapter pin. The board member, which is composed of an adapter and a second off-grid adapter and constitutes the first off-grid adapter, finely adjusts the positional relationship between the surface pattern of the printed wiring board to be inspected and the adapter pin. The structure includes a movable fine adjustment board, and the fine adjustment board has a
A board guide bin used for positioning the printed wiring board to be inspected when setting the printed wiring board to be inspected is provided protrudingly, and a fine adjustment means for finely moving the fine adjustment board in any horizontal direction is provided, and the first The wiring condition of the printed wiring board is inspected by bringing each adapter pin of the off-grid adapter and the second off-grid adapter into contact with the inspection points on the lower surface and the upper surface of the printed wiring board to be inspected, respectively. This is a top and bottom type adapter for wiring board inspection machines.

Each base of the first off-grid adapter and the second off-grid adapter includes a stock mesh board that guides the base end of the adapter pin, and the base, the board member, and the adapter Preferably, the adapter unit and the pin constitute an adapter unit.

[Example] Examples will be described with reference to the drawings.

FIG. 1 is a perspective view showing an embodiment of a lower off-grid adapter constructed by applying a first off-grid adapter constituting the present invention, and FIG. 2 is a perspective view showing an embodiment of a lower off-grid adapter constituting the present invention. FIG. 3 is a perspective view showing an embodiment of an upper off-grid adapter constructed by applying the adapter, and FIG. 3 is a schematic cross-sectional view of the main part of the adapter according to the present invention.

The upper and lower type adapter for a board inspection machine according to the present invention is the first
The adapter pins 10.60 of the first off-grid adapter A and the second off-grid adapter B are used to inspect both surfaces of the substrate to be inspected 30. The wiring condition of the board 30 is inspected by touching the point. In this case, the first off-grid adapter shown in FIG. 1 and the second off-grid adapter shown in FIG. Inspection is performed using a jig that is compatible with the inspection board.

Further, the upper and lower off-grid adapters are configured so that the entirety moves up and down when pressed. Therefore, the contact between the contact probe and the adapter pin is not affected by the thickness tolerance of each board or substrate used in the off-grid adapter, and is configured to contact the inspection point of the board with the optimum load, enabling stable inspection. be.

Now, the first off-grid adapter A has through-holes 3C drilled corresponding to the installation positions of the spring contact probes 20 implanted in the fixture 1 of the inspection machine in a grid pattern of 2.54 mm. a base 3 having a base 3; a board member 5 arranged parallel to the base 3 and fixed to the base 3 by a support 21 erected on the base 3; and a board member 5 inserted between the base 3 and the board member 5, An adapter pin IO whose distal end contacts the inspection point of the board to be inspected 30 and whose proximal end contacts the contact probe 20 of the inspection machine; 10 and a pin support board 4 for correcting the deflection of the pin.

As described above, contact probes 20 are implanted in the fixture 1 in a grid pattern, and each contact probe 20 is connected to a switching circuit in pairs.

The first off-grid adapter A is set on the probe guard plate 2. The probe guard plate 2 is formed of an insulating plate, is mounted on the fissure 1, and is moved up and down by a spring 32 (see FIG. 3). And on the probe guard plate 2,
A through hole 2a is bored at the same position as the contact probe 20 of the fixture 1, and guards the contact probe 20. Also, this probe guard plate 2 has
A clamping means 11 for fixing the first off-grid adapter A, a handle 14 for automatic board thickness adjustment described below, and the like are attached.

The base 3 includes a mesh board 3A formed of an insulating plate, and a stock mesh board 3B located on the mesh board 3A. In order to guide the base end of the adapter pin 1o, the mesh board 3A is provided with a contact probe 2 of the fixture 1.
A through hole is formed at approximately the same pitch as 0, and the adapter pin 10 is inserted into the through hole 3C. This mesh board 3A is fixed to (the dedicated board 6 of) the board member 5 using the pillars 21, (X-Y) fine adjustment means 13, and the like.

Similarly, a through hole 3C is also bored in the stock mesh board 3B at the same position as the contact probe 20. Also, this stock mesh board 3B is 1m
It is made of a relatively thin plate with a thickness of less than mm. and the base 3, the board member 5, and the adapter pin 10.
This constitutes an adapter unit, and this adapter unit is removed and replaced for each board to be inspected for inspection. Further, as shown in FIG. 5, the stock mesh board 3B, the board member 5, and the adapter pin 10 are formed so that the adapter unit can be stored while maintaining its main body shape. In addition, the stock mesh board 3
B is fixed to the board member 5 with a support 21 or the like.

The pin support board 4 is the mesh board 3A.
The pin insertion hole 4a is arranged to correct the deflection of the adapter pin between the dedicated board 6 and the dedicated board 6, and a pin insertion hole 4a for inserting the adapter pin 10 is formed therein. Therefore, even if the diameter of the rod portion of the adapter pin 10 is very small, the deflection of the bottle can be corrected. It is preferable that the pin support board 4 corresponds to the position of the hole (it may be slightly deviated).It goes without saying that a plurality of pin support boards 4 may be arranged in a layered manner.

The board member 5 includes a dedicated board 6 and a fine adjustment board 7.
and a bin guide board 8. Among these, the dedicated board 6 has a through hole 6a bored at the same position as the inspection point of the board to be inspected 30 (see Fig. 4).
, made of a transparent board such as acrylic material. One adapter pin 1o is inserted into the through hole 6a. Thus, the adapter pin 10 is inserted through the insertion hole 4a of the pin support board 4 and the through hole 3c of the stock mesh board 3B and mesh board 3A. The fine adjustment board 7 is for finely adjusting the positional relationship between the surface pattern of the substrate to be inspected and the adapter pin 10, and is movable by operating a fine adjustment means 13, which will be described later. The fine adjustment board 7 is fixed to the fine adjustment means 13, and is provided with a protruding board guide bin 9 for setting the board to be tested with high positional accuracy when setting the board to be tested. Further, in the pin guide board 8, like the dedicated board 6, a through hole 8a is bored at the same position as the inspection point of the board to be inspected.

This bin guide board 8 is used to provide precision in the position of the tip of the adapter pin 10, and also serves as a stopper to prevent the adapter pin 10 from being pulled out. The board member 5 is formed by inserting all the adapter pins 10 and then sequentially setting the dedicated board 6, fine adjustment board 7, and pin guide board 8.

The board guide and bottle 9 are inserted and locked into small locking holes 30a formed at the corners of the board 30. If there is no need to finely adjust the positional relationship between the pattern on the bottom surface of the substrate 30 and the adapter pins 10, the substrate guide bin 9 is fixed to the pin guide board 8, and if fine adjustment is necessary, The board guide bin 9 is fixed to the fine adjustment board 7.

The adapter pin lO is formed as a rigid pin for electrically connecting the inspection point of the substrate to be inspected 30 and the contact probe 20 used in the fixture 1, and connects the first off-grid adapter A. By disassembling it, it can be used permanently. In addition, when the adapter pin 10 is thin with a rod diameter of 0.6 mm or less, the rod portion is coated with an insulating coating, so short circuits due to contact with other adapter pins are completely prevented (
It is very easy to assemble.

Reference numeral 13 denotes a fine adjustment means that can finely move the fine adjustment board 7 in any direction in the horizontal direction (X-Y direction in FIG. 1). The positional relationship between the inspection points on the inspection board 30 and the adapter pins 10 of the first off-grid adapter A is finely adjusted. By operating this fine adjustment means 13, it becomes possible to finely adjust both the upper surface side and the lower surface side of the substrate to be inspected 30. Reference numeral 12 denotes a bin used for positioning when setting the first off-grid adapter A on the probe guard plate 2, and is fixed to the probe guard plate 2. Reference numeral 14 is a handle for automatic substrate thickness adjustment attached to the probe guard plate 2, and is used to press the substrate 30 to be inspected with the optimum stroke of the contact probe.
It has a built-in mechanism that automatically adjusts the pressurizing stroke depending on the plate thickness. Adjustment of the pressure stroke of this automatic board thickness adjustment handle 14 is performed using the second off-grid adapter B.
This is done by pressing the handle 64 in the automatic substrate thickness adjustment handle 14. Further, it is possible to lift the probe guard plate 2 with this handle 14 for automatic substrate thickness adjustment.

The first off-grid adapter A is constructed as described above, and is detachably attached to the mesh board 3A using the toggle clamp 11A of the clamping means 11.

Next, the second off-grid adapter B arranged on the upper surface side of the substrate to be inspected 30 will be explained. The second off-grid adapter B is implanted in the fixture 51 of the inspection machine in a grid pattern. A base 5 having a through hole 53c drilled corresponding to the location of the contact probe 70.
3 and is arranged parallel to this base 53, and the base 5
A board member 55 is fixed to this base via a support 71 erected on the base 3, and is inserted between the base 53 and the board member 55, and its tip comes into contact with the inspection point of the board 30 to be inspected. an adapter pin 60 whose end contacts the contact probe 70 of the inspection machine; and the base 53.
The base 53 is provided with a pin support board 54 arranged between the mesh board 53A and the board member 55 to correct the deflection of the adapter pin 60;
and a stock mesh board 53B, and this base 53, the board member 55, and the adapter pin 60 constitute an adapter unit.
It is the same as the off-grid adapter A in the above, except that the board member 55 is composed of a dedicated board 56 and a pin guide board 58 and does not include a fine adjustment board; it does not have a board guide bin. The configuration is different from that of off-grid adapter A. Reference numeral 52 is a probe guard plate, 61 is a clamping means, and 62 is a pilot bin. Further, 64 is a handle attached to the probe guard plate 52, which comes into contact with the automatic substrate thickness adjustment handle 14 and cooperates with the handle 14 to adjust the lower probe guard plate 2.
Press down horizontally. This handle 64 is also used when carrying the probe guard plate 52.

Therefore, when the first off-grid adapter A and the second off-grid adapter B are set and the board is inspected, the tip of the adapter pin contacts the inspection point of the board to be tested with the optimum load, and The amount of depression of the off-grid adapter when pressed is automatically adjusted according to the thickness of the board to be inspected so that the off-grid adapter moves up and down in parallel. Therefore, there is no need to adjust the amount of sinking of the off-grid adapter depending on the thickness of the substrate to be inspected, and workability is extremely high.

Furthermore, regardless of whether the board is single-sided or double-sided simultaneously,
Board inspection is possible with just this off-grid adapter. That is, this off-grid adapter can be used by setting it only on the lower side, or it can be used by setting it on both the lower side and the upper side.

[Effects of the Invention] Since the present invention is configured as described above, it produces the following effects.

When the adapter according to claim 1 is used, since the pin support board is disposed between the board member and the base, extremely thin adapter pins can be used.
Furthermore, the adapter pin is guided by the board member, which improves the precision of the tip position of the adapter pin, making it easy to inspect patterns on boards where the inspection points are becoming denser and finer, and moreover, inspection can be performed accurately. can.

Both the upper and lower off-grid adapters can be easily set and reset using the clamp mechanism of the inspection machine, resulting in very good workability.

Furthermore, both the upper and lower off-grid adapters can be finely adjusted according to the patterns on the lower and upper surfaces of the substrate to be inspected, which is very effective against misalignment of the patterns.

In addition, the board to be inspected can be assembled with the upper and lower off-grid adapters by simply drilling holes in the board member, making it possible to significantly reduce running costs and making it easier to assemble the upper and lower off-grid adapters. Production time can be shortened.

When the adapter of claim 2 is used, since the stock mesh board is provided so as to be separable from the mesh board, the adapter can be stored without disassembling the entire adapter, and can be reassembled when used for re-inspection. Since there are almost no parts, it does not require much time to prepare for assembly during re-inspection.

Since all the adapter pins used for the upper and lower off-grid adapters can be the same, there is no need to use different adapter pins for the upper and lower off-grid adapters, and handling during assembly is easy.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of a lower off-grid adapter constructed by applying a first off-grid adapter constituting the present invention, and FIG. 2 is a perspective view showing an embodiment of a lower off-grid adapter constituting the present invention. A perspective view showing an example of an upper off-grid adapter configured by applying the adapter, FIG. 3 is a schematic cross-sectional view of the main part of the adapter according to the present invention, and FIG. 4 is a cross-section of the main part of the first off-grid adapter. An enlarged schematic diagram, FIG. 5 is a schematic cross-sectional diagram showing the adapter unit of the first off-grid adapter, FIG. 6 is an enlarged schematic cross-sectional diagram of the main part of the second off-grid adapter, and FIG. 7 is an adapter of the second off-grid adapter. It is a cross-sectional schematic diagram showing a unit. 1.51... Fixture 2.52... Probe guard plate 3.53...
Pace 4.54 ... Pin support board 5.55 ... Board member 7 ... Fine adjustment board 9 ... Board guide bin 0.60 ... Adapter pin 1, 61 ... Clamping means 2 .62... Pilot bin 3... Fine adjustment means 1.71... Support

Claims (2)

[Claims] (1) a base having through holes drilled in correspondence with the arrangement positions of contact probes implanted in a grid pattern in a fixture of an inspection machine, and arranged parallel to the base;
and a board member fixed to the base via a support erected on the base; the board member is inserted between the base and the board member, the tip end contacts the inspection point of the printed wiring board to be inspected, and the base end a first off-grid adapter and a second off-grid adapter, each comprising an adapter pin whose portion contacts a contact probe of an inspection machine; and a pin support board disposed between the base and the board member to correct deflection of the adapter pin; an off-grid adapter, wherein the board member constituting the first off-grid adapter includes a fine adjustment board that moves to finely adjust the positional relationship between the surface pattern of the printed wiring board to be inspected and the adapter pin. The fine adjustment board has board guide pins protruding thereon for use in positioning the printed wiring board to be inspected when setting the printed wiring board to be inspected, and the fine adjustment board is slightly moved in any horizontal direction. A fine adjustment means is provided to adjust the wiring condition of the printed wiring board by bringing each adapter pin of the first off-grid adapter and the second off-grid adapter into contact with the inspection points on the lower surface and the upper surface of the printed wiring board to be inspected, respectively. A top and bottom type adapter for printed wiring board inspection machines, which is characterized by its ability to perform inspections. (2) Each base of the first off-grid adapter and the second off-grid adapter includes a stock mesh board that guides the base end of the adapter pin, and the base, the board member, and the adapter 2. The vertical type adapter for a printed wiring board inspection machine according to claim 1, wherein the pin constitutes an adapter unit.