JPH034941Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Technical Field of the Invention The present invention relates to a test jig for testing the characteristics of various specific types of printed circuit boards using one testing machine.

(b) Background of the technology Recently, there has been a marked trend toward increasing the variety of printed circuit boards in smaller quantities, and installing dedicated testing equipment poses problems in terms of investment efficiency, and the operator's time loss due to setup changes is large. For this reason, there is a strong demand for the development of a test jig that can perform characteristic tests on a variety of specific types of printed circuit boards with simple switching operations.

(c) Prior art and problems Figure 1 is a diagram for explaining a conventional printed board testing jig. Leads of the mounted components, 4 is a test contact pin, 6 and 6' are guide pins, 7 is an airtight pad,
8 is an airtight sheet, 9 is a movable plate, 10 is a restoring spring,
Reference numeral 11 indicates a conducting wire, and reference numeral 12 indicates a tester section.

As shown in FIG. 1, when the air in the test chamber 1 is evacuated in the direction of arrow A to reduce the pressure, the printed board 2 to be tested is sucked in the direction of arrow B along the guide pins 6, and the printed board 2 to be tested is mounted. lead 3 of the parts
contacts the contact pin 4 attached to the test chamber 1. As a result, the printed board 2 under test
The circuits between the components mounted on the tester section 12 and the tester section 12 are connected through the contact pins 4 and the conductive wires 11, and the tester section 12 determines the quality of the circuit of the printed board 2 under test. Note that the movable plate 9 supports the printed board 2 under test when it is attracted in the direction of arrow B, prevents the generation of distortion, and prevents contact between the leads 3 of the components mounted thereon and the contact pins 4. The restoring spring 10 is provided to quickly return the printed board 2 to be tested after the test to the position before the test.

However, as is clear from the structure of conventional test jigs, a dedicated test jig is required for each type of printed board, and the operator's time lost due to setup changes is extremely large. It was hot.

(d) Purpose of the invention In view of the above-mentioned conventional drawbacks, the object of the invention is to provide a test jig that can efficiently perform characteristic tests on a variety of specific types of printed circuit boards with a simple structure and operation. be.

(e) Structure of the invention According to the invention, the purpose of this invention is to provide a plurality of test contact pins in a decompression tank, and to bring the electrical circuit conductor of the printed board under test into suction contact with the test contact pins by the decompression operation. In the jig configuration for testing the characteristics of the printed circuit board under test, a hole is provided that is detachable from the group of test contact pins and allows only the test contact pins corresponding to the electric circuit conductors of the individual printed circuit boards under test to be inserted. a plurality of input pins installed in the vacuum tank in which the printed circuit board to be tested is set, or in a vacuum tank separate from it and electrically connected to the test contact pins; The circuit board has a structure in which a plurality of output pins, which are planted in the board and electrically connected to the tester part for characteristic testing, can be attached to and detached from the decompression tank, and the electrical circuit conductor of the printed board under test is attached to the surface of the board. A print characterized in that it is attached with an individual board forming an input contact capable of contacting the input pins of the same arrangement pattern and a plurality of output contacts electrically connected to the input contact and capable of contacting each of the output pins. This is accomplished by providing a plate test fixture.

(f) Example of implementation of the idea Embodiments of the present invention will be described in detail below with reference to the drawings.

Figure 2 shows one of the printed board test jigs according to the present invention.
This is a diagram showing an example structure, in which the same parts as in FIG. Contact, 22 is input pin,
23 is a guide pin for individual boards, 24 is a guide plate,
25 is an airtight pad, 26 is a connection switching tank, 27 is an individual board, 28 is a conductor for circuit connection, 29 is an output contact, 30 is an output pin, 120 is a connection switching unit composed of the individual board 27, guide plate 24, etc. ,1
Reference numeral 21 indicates a partition plate.

As shown in FIG. 2, the test tank 1 and the connection switching tank 26 are integrally provided on the same board, separated by a partition plate 121. In the test tank 1, in order to test various types of printed circuit boards to be tested, the number of arranged contact pins 4 is increased and a movable plate 9 is used which has guide holes corresponding to each pin. A selection mask 20 for selecting contact pins according to the selection is removably provided. On the other hand, the connection switching tank 26 includes an input pin 22 connected to the communication lead wire 12 led out from each contact pin 4 of the test tank 1, and an output pin 30 connected to each lead wire 11 led out from the tester section 12. and a movable plate 1 that inserts and guides these input pin group 22 and output pin group 30, respectively.
9 and a guide plate 24, and input contacts 21 and output contacts 29 arranged in the same arrangement pattern as the electric circuit conductors of the printed board under test at predetermined positions on the surface of the board to configure different wiring patterns depending on each printed board under test. An individual board 27 is provided. In addition, input contact group 21 and output contact group 2
Reference numeral 9 selectively contacts the input pin group 22 and the output pin group 30, and the contacted input pins and output pins are connected to the circuit connection conductor 28.
The connection is made on the individual board 27.

Next, an example of a test operation using the test jig having the above configuration will be explained. First, the selection mask 20 and individual board 27 corresponding to the printed board 2 to be tested are attached to the test tank 1 and the connection switching tank 26, and then the printed board 2 to be tested is attached to the test tank 1. After this, test tank 1
The air inside is exhausted in the direction of arrow A to reduce the pressure. As a result, the printed board 2 under test is attracted in the direction of arrow B along the guide pin 6, and the printed board 2 under test is
The lead 3 of the component mounted on the board comes into contact with the contact pin 4 necessary for testing the printed circuit board 2 under test exposed from the selection mask 20, and as a result, the lead 3 of the component mounted on the board contacts the input pin 22 via the connecting conductor 12. All circuits are constructed. Subsequently, when the air in the connection switching tank 26 is exhausted in the direction of arrow C to reduce the pressure, the individual board 27 is sucked in the direction of arrow D along the guide pin 23, and the The input contact 21 and the output contact 29 contact the input pin 22 and output pin 30 provided in the connection switching tank 26 of the connection switching section 120. As a result, the circuit components of the printed board 2 under test, the contact pins 4 of the test tank 1, the connecting conductor 12, the input pin 22 of the connection switching tank 26, the individual board 27, the output pin 30, and the conductor 11 are connected to the tester section. 12 circuits are constructed, and the tester section 12 determines the quality of the printed board 2 to be tested. In this case, connection switching section 1
20 are independent by the partition plate 121,
During testing of the same type of printed circuit board 2 under test, if the pressure inside the connection switching tank 26 is constantly reduced, the input contacts 21 and output contacts 29 provided on the individual boards 27 and the input pins 22 and output pins 30 of the connection switching tank 26
A stable contact state can be maintained at all times. The guide plate 24, the switching part movable plate 19, and the restoring spring 10 are explained in the previous figure.
It is omitted because it is equivalent to .

FIG. 3 is a diagram for explaining a modification of a part of the printed board testing jig according to the present invention. In this modification, an intermediate pin 40 is attached to the selection mask 20, and a spring 41 is attached to the contact pin 4. The contact pin 4' that does not come into contact with the lead 3 of the component mounted on the printed board 2 under test is
As shown in the figure, damage is prevented by maintaining a natural state without being pressed by the selection mask 20. Further, the load applied to the selection mask 20 is also reduced. In this manner, the present invention can test various types of printed circuit boards by exchanging the selection mask 20 and the individual boards 27 according to the type of printed circuit board. Note that the test tank 1 and the reduced pressure tank of the connection switching tank 26 are not limited to separate structures using partition plates, but may have a structure in which they communicate with each other. In this case, it goes without saying that the printed board to be tested and the individual board will be sucked at the same time.

(g) Effects of the invention As explained in detail above, the printed board test jig of the invention has a simple configuration that requires only slight modification of the test chamber and the addition of a connection switching section, and is easy to operate.
This has a great effect in that it is possible to easily and accurately and efficiently test various types of printed circuit boards using a standard testing machine.

[Brief explanation of the drawing]

Fig. 1 is a diagram for explaining a conventional printed board testing jig, Fig. 2 is a diagram showing the structure of a printed board testing jig according to an embodiment of the present invention, and Fig. 3 is a diagram for explaining the printed board testing jig shown in Fig. 2. FIG. 7 is a diagram for explaining a partial modification of the test jig. In the drawing, 1 is a test tank, 2 is a printed circuit board to be tested, 3 is a lead of a component mounted on the printed board to be tested, 4 is a contact pin, 6 and 6' are guide pins, 10 is a restoring spring, and 12 is a tester section. ,2
0 is a selection mask, 23 is an individual board guide pin, 24 is a guide plate, 26 is a connection switching tank, 27 is an individual board, 120 is a connection switching unit, and 40 is an intermediate pin.

Claims (1)

[Scope of utility model registration request] In a jig configuration in which a plurality of test contact pins are provided in a decompression tank, and the electric circuit conductor of the printed board under test is brought into suction contact with the test contact pins by the depressurization operation to test the characteristics of the printed board under test. , a selection mask that is detachable from the group of test contact pins and has a hole through which only the test contact pins corresponding to the electric circuit conductors of the individual printed boards under test can be inserted; and the reduced pressure in which the printed boards under test are set. a plurality of input pins that are planted in the tank or a vacuum tank separate from the tank and electrically connected to the test contact pins; and a plurality of input pins that are also planted in the vacuum tank and are electrically connected to the tester section for characteristic testing. a plurality of output pins, and a board configured to be detachably attached to the decompression tank, and an input contact capable of contacting the input pins having the same arrangement pattern as the electric circuit conductor of the printed board under test on the surface of the board, and an input contact at the input contact. 1. A printed board testing jig, characterized in that an individual board is attached thereto, each board having a plurality of output contacts that are electrically connected and can come into contact with each of the output pins.