JPS6138575A - Adapter unit for printed circuit board checking machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical field to which the invention pertains The present invention relates to an adapter vcEA for a printed wiring board inspection machine.
This invention relates to an adapter unit for a general-purpose printed wiring board inspection machine that enables the T+ to inspect a board mounted in a flat package.

As is well known, a conventional printed wiring board inspection machine examines the mutual electrical connection relationship between two arbitrary terminal areas on each printed wiring board for each printed wiring board.

That is, it has the function of inspecting whether the electrical connections are in a connected state or in an insulated state, and identifying those that are not in a normal electrical connection. Here, the state of the wiring pattern on the printed wiring board to be inspected, that is, the arrangement of the terminal area groups, varies widely, and this is due to the fact that the grid spacing that determines the terminal area is not a fixed standard. This is due to the fact that it is not standardized and is put into practical use based on the peak value, and moreover, a single type of printed wiring board contains a variety of lattice pitches. Therefore, in principle, a dedicated fixture is required for each printed wiring board to be inspected.

In order to avoid the above-mentioned problems, in the past, for example, an inspection machine equipped with 2.54 mm pitch grid points was used as a standard to inspect the printed wiring board to be inspected.
- Inspection of each printed distribution board was carried out by selectively replacing and using adapters prepared for each category 11.

However, conventional adapters have disadvantages in that they are difficult to operate and require a lot of time and effort for inspection and preparation for the inspection.

The present inventor has conducted extensive research to resolve the above drawbacks,
We have developed an adapter for printed wiring board inspection machines (off-clid adapter) that is extremely easy to operate. The off-clid adapter is described in detail in Japanese Patent Application No. 156875/1987 filed by the same applicant as the present application.

Therefore, in a general-purpose printed wiring board inspection machine that inspects a printed wiring board whose inspection points are on a 2.54 mm grid, if the inspection points of the board to be inspected are not on a 2.54 mm grid, the It was possible to test using the off-grid adapter described in the book.

However, when the density of inspection points is high, such as on printed circuit boards with flat packages. The pitch of the inspection point is X river (for example, 9.8m)
m pitch, etc.) (hereinafter, such cases will be collectively referred to as 4')
:J density inspection point).

It was impossible to test even with the off-grid adapter.

OBJECTS OF THE INVENTION The present invention has been made to overcome the above-mentioned drawbacks inherent in the off-grid adapters6, F), therefore, it is an object of the present invention to overcome the above-mentioned drawbacks inherent in the off-grid adapters. The object of the present invention is to provide a new means for quickly and accurately inspecting even when the particles are extremely small.

Disadvantage of the Invention In order to achieve the above object, an adapter unit for a printed plate 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, and has a head part. a mesh board in which a plurality of first through holes are formed to correspond to a plurality of cone-shaped probe pins; a wiring pattern of a printed wiring board to be inspected, which is fixed to the mesh board in parallel via a spacer; a dedicated board formed with a second through hole corresponding to the plurality of probe pins; a hole into which the cone-shaped head of the probe pin is fitted; An adapter for a printed wiring board inspection machine, comprising a plurality of adapter pins that are selectively and detachably inserted into first and second through holes and connected to the probe pins in contact with the probe pins, the adapter being formed on the dedicated board. a first pin board that is engaged with the third through hole; a second pin board that is fixed to the first pin board in parallel and opposed relation to each other via a second spacer; The probe pins of the high-density inspection point horn 2 were planted on the pin board, and the probe pins of the horn 2 were planted on the second pin board at a standard grid spacing (for example, 2.54 mm), and one end was planted on the fixture. A third probe pin is connected in contact with the probe pin and the other end is connected to a corresponding one of the second probe pins. (This is considered as a bonus.)

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a preferred embodiment of the present invention will be specifically described with reference to the drawings.

FIG. 1 is a perspective view showing an embodiment of the adapter unit according to the present invention, and FIG. 2 is a schematic cross-sectional view showing the state when the adapter unit according to the present invention is attached to an adapter for printed wiring board inspection. . In the figure, reference numeral 11 indicates a fixture mounted on the top surface of the inspection machine, and on the fissure 11, a plurality of probe bins 12 are arranged in a matrix shape with a grid point pitch of, for example, 2.54 mm, and in the vertical direction. It is retractably planted in the The adapter, designated generally by reference numeral 13, is a fixture of Fixture 1.
A mesh board 15 in which a plurality of through holes 14 are bored corresponding to a plurality of probe pins 12 arranged in a grid pattern on the mesh board 15, and the mesh board 15 and the plurality of spacers 1.
A dedicated board 19 is connected and fixed in parallel through the mesh board 19 and has a plurality of through holes 18 formed therein corresponding to the wiring pattern of the printed wiring board to be inspected. It is selectively and removably inserted into the hole 14 and the through hole 18 of the dedicated board 19 with 2t]・Includes a plurality of adapter bins 20 connected to the probe pin 12 of the C gesture 11. A through hole 21 to which an adapter unit according to the present invention is thermally attached is bored in a desired area of the dedicated board 19.

The adapter unit for a printed wiring board inspection machine according to the present invention, designated by the reference number 100, is a first bimbo)"1
01, and a second pinboard 10 that is fixed to the first pinboard 101 in parallel and opposite manner via a spacer 102.
3, a probe bin 104 for high-density inspection points (i-child spacing) installed on the first pin board 101, and a standard inspection point of, for example, 2.54 mm on the second pin board 103. The globe bins 105 are installed at (grid spacing). Each probe pin 1
The lower end of probe pin 04 and the upper end of probe pin 105 corresponding thereto are electrically connected by wiring 106. The downward direction of the probe bin/105 contacts the tip of the φ1 portion of the globe bin 12 installed in the fixture 11, as will be explained later. A substrate guide bin 107 is also implanted on the pin board 101 to guide and guide a substrate to be inspected (not shown) when it is placed thereon.

As above (1 made aku "putayu", knit 100
is inserted into the through-hole 21 formed in the special board 19 of the adapter 13 according to the requirements. However, in some cases, such as a board on which a flat package is mounted, for example,
．． Even in the case of testing a printed wiring board having a high-density test point of 8 bar 1 m, the probe pin 104 for the high-density test point is arranged in that area, and the wiring 106 of the probe pin 104 and the probe pin 10
Since the probe pin 12 is connected to the probe pin 12 through the probe pin 5, the board can be accurately inspected.

Effects of the Invention The present invention operates as described above.According to the present invention, printed wiring boards having high-density inspection points can be quickly and accurately inspected simply by attaching the device to the adapter. Therefore, a highly versatile printed wiring board inspection machine can be easily realized.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the adapter unit according to the present invention, and FIG. N2 is a schematic sectional view showing the unit according to the present invention attached to the adapter.

Claims (3)

[Claims] (1) A plurality of first penetrations corresponding to a plurality of probe pins arranged in a lattice pattern in the fixture of the inspection machine and installed vertically and retractably, and each having a cone-shaped head. A mesh board in which a hole is formed, a dedicated board fixed in parallel to the mesh board via a spacer and in which a second through hole corresponding to the wiring pattern of the printed wiring board to be inspected is formed, and the probe at the lower end. A hole is formed into which the cone-shaped head of the pin is fitted, and a cone-shaped head is provided at the upper end and is selectively and removably inserted into the plurality of first and second through-holes. An adapter for a printed wiring board inspection machine comprising a plurality of adapter pins that are connected in contact with probe pins, a first pin board that is engaged with a third through hole formed in the dedicated board; a second pin board fixed to the pin board in parallel and facing each other via a second spacer; second probe pins for high-density inspection points implanted in the first pin board; A second pin board is implanted in a standard grid spacing, and has one end in contact connection with the probe pin implanted in the fixture, and the other end connected to a corresponding one of the second probe pins. An adapter unit for a printed wiring board inspection machine, characterized in that it is equipped with three probe pins. (2) The adapter unit for a printed wiring board inspection machine according to claim (1), further characterized in that a unit consisting of each of the constituent elements is detachably attached to the adapter. (3) The adapter unit for a printed wiring board inspection machine according to claim (1) or (2), further characterized in that the first pin board is provided with a board guide pin.