JPH0637336Y2 - Wiring inspection machine adapter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an adapter for a wire inspection machine used for inspecting the electrical continuity or insulation of a wiring circuit of a printed circuit board by a wire inspection machine. Is.

[Prior Art] Generally, a wiring inspection machine for inspecting a wiring circuit on a printed circuit board for electrical continuity and insulation usually has a large number of probe head pins arranged in a grid at a constant pitch of 2.54 mm. By inserting a part of the probe head pin into the adapter and converting the off-grid portion into the on-grid, the probe head pin is brought into contact with a terminal or pad on the printed circuit board to be electrically conducted.

Conventionally, in this type of wiring inspection machine adapter, that is, in the adapter used for converting the off-grid portion into the on-grid, as shown in FIGS. 4 and 5, the probe head pin of the wiring inspection machine 1 is used. 2 ... The on-grid plate 3 made of a transparent acrylic resin located on the side, and the off-grid plate 5 integrally assembled to the on-grid plate 3 with the aluminum frame 41 interposed therebetween at appropriate intervals. This off-grid board 5 consists of a printed circuit board 6
It has a configuration such that it is located on the side.

However, in such a conventional structure, the probe head pins 2 in which a large number of pin insertion holes 3a are arranged in the on-grid plate 3 at a constant pitch in accordance with the inspection range of the wiring inspection machine 1 ... While the holes are drilled at the same pitch as the pin spacing, the off-grid plate 5 and the pin insertion holes 5a of the same pattern corresponding to the terminal portion 6a and the through hole pad 6b of the wiring pattern of the printed circuit board 6 are formed. At the time of inspection, the off-grid plate 5 is seen from the transparent on-grid plate 3 at the time of inspection, and the wiring inspection machine is placed in the pin insertion hole 3a of the on-grid plate 3 closest to the pin insertion hole 5a of the off-grid plate 5. In the present situation, the probe head pins 2 of 1 are manually inserted one by one while being selectively confirmed.

[Problems to be solved by the invention] For this reason, it is costly to punch the pin insertion holes 3a corresponding to all the probe head pins 2 of the wiring inspection machine 1 in the on-grid plate 3 with high accuracy. However, if all the pin insertion holes 3a ... Are densely formed in the on-grid plate 3 as described above, the pin insertion holes 5a of the off-grid plate 5 located below are formed. Becomes difficult to see, and it becomes difficult to insert the pins. Moreover, the larger the number of inserted pins, the longer the insertion work.

Further, the on-grid plate 3 and the off-grid plate 5 are
Since the frame body 41 is integrally assembled and fixed, if the wiring pattern of the printed circuit board 6 is different, it is necessary to reassemble the printed circuit board every time. Therefore, the assembly work requires a lot of time and is inconvenient to store. Not only the on-grid board 3 having different wiring patterns on the same printed circuit board 6 at the time of inspection due to accuracy error at the time of assembly
There is a possibility that a pin may be inserted through the pin insertion hole 3a, and there is a problem that an inspection failure is likely to occur due to such a pin insertion error.

[Purpose of Invention] The present invention has been made under the above circumstances. The purpose of the present invention is to facilitate the pin insertion work and to reliably prevent defective inspection due to pin insertion error. An object of the present invention is to provide an inexpensive wiring inspection machine adapter that can be used.

[Means for Solving Problems] In order to solve the above-mentioned problems, the present invention provides an inspection machine main body having a large number of probe head pins arranged in a grid at a constant pitch, and the inspection machine main body described above. An adapter for a wiring inspection machine, which is used by interposing a probe head pin with an inspection point and a printed board to be inspected, said adapter being provided on the side of the printed board to be inspected. An off-grid plate formed by forming a pin insertion hole into which the probe head pin of the inspection machine body is inserted at the same position as the inspection point on the printed circuit board, and a state in which the off-grid plate has an appropriate interval and the inspection machine Probe head pins arranged on the main body side and overlapped with each other, and arranged at positions corresponding to the pin insertion holes of the off-grid plate on the inspection machine main body; The on-grid plate has the same pitch and is formed with pin insertion holes each having a large opening on the surface side facing the off-grid plate.

[Operation] That is, according to the present invention, with the above configuration,
On the off-grid plate, a pin insertion hole for inserting the probe head pin of the inspection machine body is formed at the same position as the inspection point of the printed circuit board to be inspected, while on the on-grid plate, each pin insertion hole of the off-grid plate is formed. Since the corresponding pin insertion holes are formed at the same pitch as the probe head pins arranged in the inspection machine body, the on-grid plate has all of the probe head pins arranged in the inspection machine body. Since the on-grid conversion is performed for the inspection point of the printed circuit board and only the necessary pin insertion holes are provided without drilling the pin insertion holes, the cost required for drilling can be reduced and the cost can be reduced. In addition, the number of pin insertion holes drilled in the on-grid plate is small, so pin insertion work into the pin insertion holes of the off-grid plate is simple. It can be performed, which makes it possible to reliably prevent poor inspection by inadequate insertion of the pin.

Further, the pin insertion hole formed in the on-grid plate is a hole having a large opening on the side facing the off-grid plate. Therefore, when inserting the probe head pin inserted into the pin insertion hole of the on-grid plate into the pin insertion hole of the off-grid plate, the degree of freedom of deformation in the direction orthogonal to the insertion direction of the probe head pin increases, and the pin insertion operation becomes extremely difficult. It becomes easy and the load on the probe head pin at the time of insertion can be reduced.

[Embodiment] Hereinafter, the present invention will be described in detail with reference to an embodiment shown in FIGS. 1 to 3. In the illustrated embodiment according to the present invention, the same reference numerals are used for the portions having the same structures as those of the conventional structure shown in FIG.

That is, the adapter for the wiring inspection machine according to the present invention is the first
As shown in the figure, the probe head pin 2 of the inspection machine body 1
On the off-grid board 5 which is inserted from above, the inspection point of the printed circuit board 6 to be inspected, that is, the same position and pitch interval l _{1 as} the terminal portion 6a and the through hole pad 6b
The pin insertion hole 5a is bored with l ₂ and l ₃ , while the pin corresponding to the pin insertion hole 5a of the off-grid plate 5 and having a large opening on the side facing the off-grid plate The insertion holes 3a are bored in the on-grid plate 3 at the same pitch interval (2.54 mm) L ₀ as the probe head pins 2 arranged in the inspection machine body 1, and the on-grid plate 3 and the off-grid plate 3 are formed. As shown in FIG. 2, 5 and 5 are integrally pumped and fixed at a predetermined interval via a connecting tool 4 to form a cassette type unit, and this unit 10 can be detachably attached to a cassette holder 11. Each of the pin insertion holes 3a perforated in the on-grid plate 3 is subjected to on-grid conversion with respect to the inspection pattern of the printed circuit board 6, and this perforation data is taken as one unit. 2.54mm matrix The data is converted into boxes and the required number of holes are punched.

Therefore, according to the configuration of the wiring inspection machine adapter according to the present invention described above, as shown in FIG. 3, facing the pin insertion holes 3a, 5a of the on-grid plate 3 and the off-grid plate 5,
When inserting the probe head pins 2 of the inspection machine body 1, the on-grid plate 3 has only the pin insertion holes 3a necessary for on-grid conversion of the inspection pattern of the printed circuit board 6. The corresponding positional relationship with the pin insertion hole 5a of the off-grid plate 5 is easy to see, and moreover, the on-grid plate 3 and the off-grid plate 5 are connected to each other by the connecting tool 4
By integrally assembling through to make unit 10,
Since the cassette holder 11 is loaded, the work of inserting the probe head pin 2 of the inspection machine body 1 can be easily performed. If a large number of various units 10 corresponding to the inspection patterns of different printed circuit boards 6 to be inspected are assembled, and the probe head pin 2 of the inspection machine body 1 is inserted into the pin insertion holes 3a and 5a in advance, By simply exchanging various units 10 without reassembling, different printed boards 6 to be inspected can be easily inspected in a short time, work efficiency can be improved, and the cassette holder 11 can It only requires a table, is inexpensive, and can be stored easily.

It should be noted that the present invention is not limited to the above-described embodiments, and it goes without saying that various modifications can be made without departing from the spirit of the present invention.

[Effect of the Invention] As described above, according to the present invention, it is possible to inspect the printed circuit board without forming all the pin insertion holes corresponding to the probe head pins arranged in the inspection machine body in the on-grid plate. Since the on-grid is converted to points and only the necessary pin insertion holes are drilled, the cost required for drilling can be reduced, the cost can be reduced, and the pins drilled on the on-grid plate can be reduced. Since there are few insertion holes, it is possible to easily perform the pin insertion work into the pin insertion holes of the off-grid plate, and thus it is possible to reliably prevent inspection failures due to pin insertion errors.

Further, since the pin insertion hole formed in the off-grid plate is a hole having a large opening on the surface side facing the off-grid plate, the probe head pin inserted in the pin insertion hole of the on-grid plate can be inserted into the pin of the off-grid plate. When inserting into the insertion hole, the degree of freedom of deformation in the direction orthogonal to the insertion direction of the probe head pin increases, which makes the pin insertion operation extremely easy and reduces the burden on the probe head pin during insertion. Play.

[Brief description of drawings]

FIG. 1 is a schematic exploded perspective view showing an embodiment of a wiring inspection state of a printed circuit board using the adapter for the wiring inspection machine according to the present invention, and FIG. 2 is a cassette structure of the adapter for the wiring inspection machine. Figure 3 is a schematic exploded perspective view showing
Part 4 enlarged cross-sectional view showing the state of inserting the pin on the I line
FIG. 5 is a schematic exploded perspective view of a conventional wiring inspection machine using a conventional wiring inspection machine adapter, and FIG. 5 is a perspective view of the same wiring inspection machine adapter. 1 ... Wiring inspection machine main body, 2 ... Probe head pin, 3 ... On-grid plate, 4 ... Coupling tool, 5 ... Off-grid plate, 6 ... Printed circuit board, 6a, 6b ... Inspection point, L ₀ …… Probe head pin pitch interval, l ₁ , l ₂ , l ₃ …… Inspection point pitch interval.

Claims (1)

[Scope of utility model registration request] 1. An inspection machine body having a large number of probe head pins arranged in a grid at a constant pitch, and a printed circuit board to be inspected by bringing the probe head pins of the inspection machine body into contact with an inspection point. A wiring inspection machine adapter used by interposing, wherein the probe head pin of the inspection machine body is inserted at the same position as the inspection point of the printed circuit board, which is provided on the printed circuit board side to be inspected. Corresponding to the off-grid plate with a pin insertion hole formed on it and the off-grid plate with a proper interval and located on the inspection machine body At the same position as the probe head pins arranged in the main body of the inspection machine, and the surface side facing the off-grid plate is largely opened. Wiring inspection machine adapter and on the grid plate formed by drilled pin insertion holes consisting of holes, characterized by comprising comprises a.