JPH04120377U - Continuity test jig for printed wiring boards - Google Patents

Abstract

(57) [Summary] [Purpose] A continuity testing jig used for continuity testing of printed wiring boards that can accurately position the printed wiring board on the testing jig and improve the efficiency of testing high-density printed wiring boards. The purpose of the present invention is to provide a continuity test jig for wiring boards. [Configuration] Lower inspection jig 3 on which printed wiring board P is placed
A finely adjustable guide pin 5 is loosely fitted into the through hole of the printed wiring board P, and the tip of the guide pin 5 is inserted into the guide hole 1 of the printed wiring board P.
2 and by finely adjusting the guide pins 5, the printed wiring board P can be accurately positioned with respect to the lower inspection jig 3.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea is a printed wiring board continuity test used for continuity testing of printed wiring boards. Regarding jigs.

0002

[Conventional technology]

Printed wiring boards usually have a conductor circuit on the surface or inner layer of the board. Continuity testing of conductor circuits is performed using a test jig at the terminals provided at the start and end points of the conductor circuit. Is the specified continuity established by making contact with the contact probe attached to the is determined.

0003 This method is performed by overlapping the continuity test jig and the printed wiring board to be tested. Now, at this time, the contact probe must be brought into precise contact with the terminal. stomach.

0004 Conventionally, as this positioning means, for example, Japanese Patent Laid-Open No. 60-42661 As shown in the report, fit the product into the product frame plate provided on the continuity test jig, and then Continuity test jig that positions the component wiring board in a predetermined position, or on the continuity test jig. Stand up a fixed guide pin and insert this guide pin into the guide hole provided on the printed wiring board. A continuity test jig that positions the printed wiring board in the correct position by inserting the is being implemented.

[0005] Furthermore, the conductor circuit of the printed wiring board is optically read, and this reading pattern is The conduction jig is automatically moved along the A conduction jig for performing alignment has been known in the past.

[0006]

[Problem that the idea aims to solve]

However, in the conventional continuity test jig, for example, The continuity test jig shown in Publication No. 1 detects deviations in machining dimensions within the product specifications, Accuracy is not sufficient for alignment of printed wiring boards with high-density wiring patterns There is a drawback.

[0007] In addition, in the method of equipping the continuity test jig with fixed guide pins, If a machining dimension deviation occurs in the guide hole of the wiring board, there is a problem that it cannot be corrected. Ru.

[0008] Additionally, the conductor circuits on printed wiring boards are optically read and aligned automatically. This method requires expensive and complicated equipment such as optical scanners, and is significantly The problem was that it led to high costs.

[0009] This invention was created in view of these circumstances, and the purpose of this invention is Roha is inexpensive and allows for accurate positioning of printed wiring boards in continuity testing jigs. An object of the present invention is to provide a continuity testing jig for a printed wiring board.

0010

[Means to solve the problem]

In order to achieve the above object, the continuity test jig for printed wiring boards according to the present invention has the following features: Lower side inspection where the printed wiring board is placed and the continuity of the conductor is checked from the bottom side of the wiring board. A jig, an upper side inspection jig that inspects conductor continuity from the top side of the wiring board, and a lower side inspection jig. It is loosely fitted into the through hole of the inspection jig so that it can move minutely, and its tip touches the guide of the printed wiring board. a guide pin inserted into the hole; a support base to which the base of the guide pin is fixed; The guide pin is equipped with a fine movement mechanism that can adjust the movement of the support base in the X, Y, and θ directions. is characterized in that it can be finely adjusted independently of the lower inspection jig.

[0011]

[Effect]

As is clear from the above configuration, the print to be inspected is placed on the lower inspection jig. When the wiring board is placed, the contact probe of the inspection jig and the circuit of the printed wiring board If the terminal part of the conductor does not correspond accurately, operate the fine adjustment mechanism and adjust the guide pin support. By adjusting the holder, only the guide pin that is separate and independent from the lower inspection jig can be finely adjusted. can be moved.

0012 Therefore, the printed wiring board can be positioned in a predetermined position, and the inspection jig can It is possible to accurately match the contact probe of the circuit board with the terminal part of the circuit conductor of the wiring board. It becomes possible.

[0013]

【Example】

Below, an example of the continuity testing jig for printed wiring boards according to the present invention is shown in the attached diagram. This will be explained in detail with reference to the surface.

[0014] Figure 1 is a sectional view showing the configuration of the continuity test jig according to the present invention, and Figure 2 is the continuity test jig. It is an explanatory diagram showing the effect of.

[0015] In FIG. 1, a continuity test jig 1 for printed wiring boards according to the present invention has a support table. The lower part is fixed on the board P and is used to test the continuity of the circuit conductors on the bottom side of the printed wiring board P. The side inspection jig 3 and the lower side inspection jig 3 are located above the printed wiring board P. An upper inspection jig 4 that inspects the continuity of the circuit conductor on the upper surface side and a lower inspection jig 3 that Accurately position and adjust the printed wiring board P to be placed at a predetermined position on the lower inspection jig 3. It is roughly composed of a lower inspection jig 3 that adjusts the position, and a guide pin 5 that moves slightly separately and independently. It is.

[0016] More specifically, the upper inspection jig 4 is connected to a press device 6 and can be raised and lowered. The guide pin 5 is made of brass and has a diameter of 0.75 mm. and is fixed to a guide pin support base 7 made of a phenol laminate. Furthermore, Ga The lower surface of the id pin support base 7 is connected to the fine movement mechanism section 8. 8 can be finely adjusted in the X, Y, and θ directions by the signal from the micrometer 9. The configuration is as follows.

[0017] In addition, a lower inspection jig is placed on the printed wiring board P at a position corresponding to the terminal part of the circuit conductor. Contact probes 10 and 11 are provided on the tool 3 and the upper inspection jig 4, respectively. It is being

[0018] Since the continuity test jig 1 according to the present invention is configured as described above, for example, High-density printed wiring board conductor with body circuit pitch of 0.6 mm and conductor circuit width of 0.3 mm class. When performing a thorough inspection, in this embodiment, as shown in FIG. When the printed wiring board P is placed on the guide pin 5, the diameter of the guide pin 5 is 0.75 mm. The through hole 3a of the lower inspection jig 3 is set to a diameter of 3.0 mm, and this guide pin The ring 5 is loosely fitted in the through hole 3a, and is approximately 1 mm from the top surface of the lower inspection jig 3. The guide hole 12 (diameter is set to 0.8 mm) of the printed wiring board P is in a protruding state. inserted).

[0019] Next, the fine movement mechanism section 8 is activated by the signal from the micrometer 9, and the guide By adjusting only the dowel pin 5, the printed wiring board P can be placed in the specified position on the lower inspection jig 3. It will be positioned accurately.

[0020]

[Effect of the idea]

As explained above, according to the continuity test jig for printed wiring boards according to the present invention, the The guide pin can be finely adjusted independently from the side inspection jig, and This allows printed wiring boards to be positioned with high precision, and conventional continuity tests The rate of uninspection, which used to be 80-90% due to misalignment, has been reduced to 10% or less. was able to reduce it to

[0021] As a result, according to the continuity test jig for printed wiring boards according to the present invention, It has the effect of significantly improving the inspection work efficiency of component wiring boards. .

[Brief explanation of drawings]

FIG. 1 is a sectional view showing the overall configuration of a continuity testing jig according to the present invention.

FIG. 2 is a sectional view of a main part of the continuity test jig shown in FIG. 1.

[Explanation of symbols]

1 Continuity test jig 3 Lower side inspection jig 4 Upper side inspection jig 5 Guide pin 7 Guide pin support stand 8 Fine movement mechanism section 9 Micrometer 10,11 Contact probe 12 Guide hole P Printed wiring board

Claims (1)

[Scope of utility model registration request] Claim 1: A lower side inspection jig for placing a printed wiring board and inspecting continuity of conductors from the bottom side of the wiring board; and an upper side inspection jig for inspecting continuity of conductors from the top side of the wiring board. , a guide pin that is loosely fitted into the through hole of the lower inspection jig so as to be able to move minutely, and whose tip is inserted into the guide hole of the printed wiring board; a support base to which the base of the guide pin is fixed;
A continuity testing jig for a printed wiring board, comprising a fine movement mechanism part that can move and adjust the support base in X, Y, and θ directions, and the guide pin can be finely adjusted independently of the lower side testing jig.