JPH0578792B2 - - Google Patents

Description

[Detailed description of the invention]

(Industrial Application Field) The present invention relates to an apparatus for inspecting circuits formed on a printed wiring board, and particularly relates to an apparatus for inspecting a circuit formed on a printed wiring board. This invention relates to a circuit inspection device. (Prior Art) If a printed wiring board is not used after inspecting it to ensure continuity of the circuit formed on it, the electronic circuit components mounted on the printed wiring board must be used. Needless to say, it does not function normally. For this reason, many various testing devices have been proposed for conducting continuity testing of this type of printed wiring board. Conventionally, as a technology related to this type of printed wiring board inspection device, for example, a test device disclosed in Japanese Patent Application Laid-Open No. 155374/1982, and an inspection device disclosed in Japanese Patent Application Laid-open No. 171873/1982, There are adapters etc. The test device disclosed in Japanese Patent Application Laid-Open No. 58-155374 has a terminal board made of a transparent insulating plate, with the aim of providing a test device that does not require high precision for positioning when setting printed wiring boards. The terminal board holds conductor pins instead of spring-loaded contacts, and an elastic connector with a large number of metal needles buried in a predetermined arrangement in a flexible transparent plate is interposed between the printed wiring board under test and the terminal board. It is configured to conduct a test. On the other hand, the inspection device disclosed in Japanese Patent Application Laid-open No. 59-171873 eliminates the inconvenience of having to replace the connector board and probe board every time the type of printed wiring board changes, and the incorrect operation of each connection. For the purpose of
a probe plate that is electrically connected in correspondence with pair 1;
A connecting plate having connectors on one side arranged in a grid pattern corresponding to the probe plate and electrically connected to the output terminal of the inspection machine main body, and a connecting plate formed of an insulating thin plate and having a predetermined group of small holes. and a conductive rubber connector plate having electrical conductivity in the thickness direction, This is an adapter for a wiring inspection device, characterized in that the probe contacts a predetermined test point of the object to be inspected to electrically connect the object to be inspected and the main body of the inspection machine. A common objective that the techniques disclosed in these publications attempt to solve is the inconvenience of inspecting this type of printed wiring board. Printed wiring boards have become increasingly shorter and smaller in recent years, and along with this, ease of operation in test equipment has become even more necessary and essential. It is from. In addition, there is less and less demand for mass production of this type of printed wiring boards, and the reality is that high-mix, low-volume production has become necessary. Moreover, the number of pad portions on printed wiring boards has also increased as the printed wiring boards have become shorter and smaller. Under these circumstances, when inspecting a printed wiring board, when electrically connecting each pad part on the printed wiring board to the main body of the inspection machine, as shown in Figure 4, it is necessary to A common connection jig 50 is often used. This connection jig 50 is used to manually connect the lead wire on the probe side that contacts the pad portion and the lead wire on the inspection machine main body side. (Problems to be Solved by the Invention) It is recognized that the techniques disclosed in the above-mentioned publications have achieved their objectives to a certain extent, but as mentioned above, this type of printed wiring board cannot be mass-produced. The technologies disclosed in these publications are no longer able to adequately respond to the current situation in which we are forced to produce a wide variety of products in small quantities in response to various products. That is,
In the case of mass production, it is possible to achieve a certain purpose even with conventional inspection equipment, but when the format of the printed wiring board that is being inspected changes frequently, that is, in the case of high-mix, low-volume production. In the end, conventional technology cannot adequately handle such cases. This includes a terminal board compatible with the printed wiring board to be tested, a conductor pin instead of a spring-loaded contact (in the case of the test device shown in Japanese Patent Application Laid-open No. 58-155374), a probe board, and a connecting plate ( Unexamined Japanese Patent Publication 1983-
In the case of the inspection device shown in Publication No. 171873), it is sufficient if the type is a certain type, but if there are many types of printed wiring boards of this kind, it will have to be replaced every time. However, it cannot be said that these conventional techniques have solved the problem of ease of replacement work. In particular, when each lead wire is specifically connected using the connection jig 50 as described above, the number of lead wires is increasing, and the connection work requires a considerable amount of time (in some cases). (In some cases, this step alone can take up to 20 minutes) and can break the lead wire or damage the probe. The present invention has been made in view of the above-mentioned circumstances, and its purpose is to replace the probe panel accordingly even when there are many types of printed wiring boards to be inspected. It is an object of the present invention to provide a circuit inspection device for a printed wiring board which can be extremely easily and safely inspected with a simple configuration. (Means for Solving the Problems) The means taken by the present invention to solve the above problems will be explained with reference to FIGS. 1 to 3 corresponding to the embodiments. A plurality of probes 11 Probe panel 1 with
0 to face the printed wiring board 40 that is the object to be tested, and bring each probe 11 into contact with the pad portion 41 of the circuit formed on the printed wiring board 40, thereby conducting a continuity test of the circuit. In the circuit testing device for printed wiring boards, a pair of connection stands 12 are installed on two sides of the probe panel 10.
A connector panel 20 provided with a plurality of connector pins 21 corresponding to the connection terminals 13 is moved to face each connection base 12. Each of these connector panels 20 is connected to an actuating device 23.
By moving the pad portion 41 of the printed wiring board 40 installed on each probe panel 10 toward each connection stand 12 and the connector pin 2
This is a circuit inspection apparatus 100 for a printed wiring board, characterized in that the circuit inspection apparatus 100 is electrically connected to the terminals 1 and 1 through respective connection terminals 13. (Aspects of operation and use of the invention) By adopting the above-mentioned means, the present invention has the following effects. That is, in this circuit testing apparatus 100, first the probe panel 1 is
A printed wiring board 40 is placed on the probe panel 10 at a predetermined position so that each pad portion 41 of the printed wiring board 40 comes into contact with each necessary probe 11 on the probe panel 10. Thereafter, by activating the actuating device 23, the connection between the connector panel 20 and the connection base 12 is automatically performed. In this case, the connector panel 20 or the connection stand 12
In addition, if a guide pin or an engagement hole that engages with the guide pin is formed, the connection between the connector panel 20 and the connection base 12 will be better performed. In this way, when the connection between the connector panel 20 and the connection stand 12 is completed by the operation of the actuation device 23, each connector pin 21 on the connector panel 20 and each probe 11 on the probe panel 10 are connected to each other. They are electrically and collectively connected via the terminal 13. Therefore, the probe panel 10
An inspection machine main body 100 connected to each pad 41 of the upper printed wiring board 40 and the connector panel 20 side
a is electrically connected to the inspection machine main body 10.
Continuity testing of each circuit is performed at 0a. In particular, in the circuit testing device 100 according to the present invention, since the pair of connection stands 12 are provided on two sides of the probe panel 10, it is possible to simultaneously test the circuits on both sides of the printed wiring board 40. Naturally, the probe panel 10 can be replaced to match the printed wiring board 40 of a different type, and the probe 11 can be connected to the probe panel 10 easily and within a short time. Next, when you want to inspect a printed wiring board 40 of a different type, this printed wiring board 4
A probe panel 10 corresponding to 0 is prepared. Of course, this different type of probe panel 10 is integrally provided with the connection stand 12 according to the type of this probe panel 10, and preparing a different type of probe panel 10 means that This means that a corresponding connection stand 12 is also prepared. In the following description, a combination of the probe panel 10 and the connection stand 12 will be referred to as an inspection jig 200 for convenience. After preparing the different types of inspection jigs 200, the inspection jigs 200 that are no longer needed are removed by activating the actuating device 23, and the inspection jigs 200 prepared for this inspection are Set up. This installation may be accomplished by simply placing the inspection jig 200 on the base 30 or at a predetermined position on the support frame 31. On the probe panel 10 constituting this new inspection jig 200, a printed wiring board 40 of the type required for the current inspection is placed in the same manner as described above, and each pad portion 41 of this printed wiring board 40 is connected to the probe panel 10. Each necessary probe 11 on the panel 10 is contacted. The connection and disconnection operations between the connection base 12 and the connector panel 20 in the connection work described above are automatically and collectively performed by operating the actuating device 23. In particular, a large number of connector pins 21 provided on the connector panel 20 are arranged not only to correspond to each connection terminal 13 on the connection base 12, but also to provide connector pins 21 which are sufficiently larger than the number of each connection terminal 13 in a grid pattern. The arrangement of each connection terminal 13 on the connection base 12 is arranged on the connector panel 20.
When using a grid pattern with the same spacing (parts may be missing at each grid point), changes in the connection board 12 due to changes in the format of the printed wiring board 40 can be handled on a case-by-case basis. Therefore, the circuit of the printed wiring board 40 can be automatically and safely tested without changing the connector panel 20 at all. In addition, in this case, each connection terminal 13 and connector pin 21 during connection work
This makes it possible to equalize the forces applied to the terminals 13 and the connector pins 21, and prevent damage to the connection terminals 13 and connector pins 21 during frequent connection operations. Note that the above format is sometimes called a universal type or grid type. (Example) The present invention will be described in more detail below based on specific examples shown in the drawings. FIG. 1 shows a schematic configuration of a circuit inspection apparatus 100 for printed wiring boards according to the present invention. In this figure, only the inspection part that is the main part of the present invention is shown, and the inspection machine main body 100a that performs numerical processing for other circuit inspections is shown schematically since it is a known one, and the printed circuit board is shown schematically. The auxiliary device for placing the wiring board 40 on the probe panel 10 has been omitted. In addition, this circuit inspection apparatus 100 is designed to simultaneously inspect each pad portion 41 of the circuit on both sides of the printed wiring board 40, and there are two pairs of upper and lower probe panels 10, which will be described later. It has a pair of connector panels 20 on the left and right sides for electrically connecting the panel 10. Each probe panel 10 is made of resin to provide insulation between the probes 11, and is in direct contact with a printed wiring board 40, as shown in FIG. And this probe panel 1
A large number of probes 11 are formed protrudingly at positions corresponding to respective pad portions 41 of the circuit formed on the surface of the printed wiring board 40 shown in FIG. Each of these probes 11 is electrically connected to a connection terminal 13 on each connection stand 12 side located on the lower side of the probe panel 10, and each probe 11 and these connection terminals 1
There is a one-to-one correspondence with 3. Each connection stand 12 is formed integrally with the probe panel 10, and in the case of the embodiment shown in FIG.
It is configured so that the probe panel 10 can be placed directly on the base 30 and can also serve as a leg portion of the probe panel 10. The reason why the connection stand 12 is integrated with the probe panel 10 is that when the format of the printed wiring board 40 changes, it is necessary to convert the corresponding probe panel 10, but at the same time, the connection stand 12 is integrated with the probe panel 10. This is because the probe panel 12 also needs to be compatible with the probe panel 10, and if they are integrated in this way, replacement work can be easily performed. Therefore, these probe panels 10 and connection stands 12
In the drawing, the integrated inspection jig 200
It was shown as In addition, an engagement hole 14 is formed in a part of each of these connection stands 12 to facilitate alignment with each connector panel 20 described below. Furthermore, in the case of each connection stand 12, a recess is formed in the surface corresponding to each connector panel 20,
The head of each of the connection terminals 13 described above is disposed within this recess, and the head of each of these connection terminals 13 is arranged so that its tip does not protrude outward from this recess. As a result, each connection terminal 13
The tip of the probe panel 10 is protected by the connection base 12, and the connection base 12 is connected to each probe panel 10.
Each connection terminal 13 when moving or storing
are designed to prevent damage from careless handling. Each connector panel 20 is connected to a support shaft 22 of an actuator 23 so as to face each connection stand 12, and a plurality of connector pins 21 are provided on the surface facing the connection stand 12. Guide pins 24 are formed on the surface to face the respective engagement holes 14 formed in the connection base 12 described above. Each connector pin 21 has the shape shown in FIG. 3, and its head 21a is connected to the connection terminal 1.
When the terminal 3 is pressed against the elastic force of the spring 21b, it makes electrical contact with the corresponding connection terminal 13. Furthermore, each of these connector pins 21 is connected to a testing machine main body 100 that performs numerical processing for circuit testing using its conductor wires 21c.
It is connected to a. The connector panel 20 having the plurality of connector pins 21 is connected to an actuating device 23 via its support shaft 22, and moves forward and backward toward each corresponding connection stand 12 by the operation of the actuating device 23. It is something. This actuating device 23 is specifically constituted by an air cylinder, and is connected to a working air supply device (not shown). Note that various types of actuating device 23, such as a hydraulic cylinder and a motor drive type, can be applied. The circuit inspection apparatus 100 shown in FIG. 1 is designed to be able to simultaneously inspect circuits formed on both sides of the printed wiring board 40. The inspection jig 200 is placed on and supported by a support frame 31 provided on a base 30 constituting the circuit inspection apparatus 100. On the other hand, the upper inspection jig 2
00 is provided in the moving section 33 together with the above-mentioned actuating device 23 in the following manner. That is, a pair of columns 3 are provided vertically on the left and right ends of the base 30.
4 is provided with a moving part 33 that can be moved up and down, and the above-mentioned actuating device 23 of the inspection jig 200 is fixed to this moving part 33. Note that this inspection jig 200 is removably fixed to the moving part 33 by a mounting jig 35 provided thereon. With the above configuration, the upper inspection jig 200 moves up and down together with the moving section 33 guided by the support column 34, and the probe panel 10 is attached to each pad section 41 of the printed wiring board 40 located below. This makes it possible to electrically contact each probe 11 on the side. Moreover, the circuit inspection apparatus 100 shown in FIG.
In this case, in order to transmit electrical signals from the upper inspection jig 200 to the inspection machine main body 100a that performs numerical processing for circuit inspection, a moving section 33 corresponding to the upper inspection jig 200 is provided. A connection head 36 is provided on the support frame 31 corresponding to the inspection jig 200 and the lower inspection jig 200, respectively. (Effects of the Invention) As explained above, in the present invention, as exemplified in the above embodiment, the probe panel 1 having a plurality of probes 11 is provided.
0 to face the printed wiring board 40 that is the object to be tested, and bring each probe 11 into contact with the pad portion 41 of the circuit formed on the printed wiring board 40, thereby conducting a continuity test of the circuit. In the circuit testing device for printed wiring boards, a pair of connection stands 12 are installed on two sides of the probe panel 10.
, and each probe 11 is connected to each of these connection stands 12.
A connector panel 20 having a connection terminal 13 connected to the connection terminal 13 and a plurality of connector pins 21 corresponding to the connection terminal 13 is installed movably to face each connection stand 12, and each of these connector panels 20 is Actuation device 23
By moving the pad portion 41 of the printed wiring board 40 installed on each probe panel 10 toward each connection stand 12 and the connector pin 2
1 are electrically connected to each other through the respective connection terminals 13, and as a result, even if the format of the printed wiring board 40 is different, this printed wiring board 40 can be Corresponding probe panel 10
The present invention provides a circuit testing device 100 with a simple configuration that allows the replacement of the probe panel 10 or the replacement and connection of the probe 11, which was conventionally time-consuming, in a short period of time. can be provided. Specifically, while the conventional device required about 20 minutes for each connection operation, the present invention requires about 1 minute. Furthermore, if an engagement hole 14 is formed in the connection base 12 and a guide pin 24 corresponding to the engagement hole 14 is provided on the connector panel 20 side, the alignment in the connection between the probe 11 and the connector panel 20 can be made easier. This can be done mechanically and automatically, and the working efficiency of this circuit testing device 100 can be further improved. Furthermore, one of the pair of inspection jig 2
When the movable part 33 to which 00 is fixed is configured to be movable up and down with respect to the pillar 34, it is possible to simultaneously test the continuity of the circuits of the printed wiring board 40, which has conductor circuits formed on both the front and back surfaces. , the inspection work for this type of printed wiring board 40 can be further simplified.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a schematic configuration of a circuit inspection device that is an embodiment of the present invention, FIG. 2 is a perspective view showing the main parts of FIG. 1, and FIG. FIG. 4 is an enlarged vertical cross-sectional view of the connector pin shown in FIG. Explanation of symbols, 100...Circuit inspection device, 10...
...Probe panel, 11...Probe, 12...
Connection stand, 13... Connection terminal, 14... Engagement hole, 2
0... Connector panel, 21... Connector pin, 22... Support shaft, 23... Actuation device, 24...
... Guide pin, 31 ... Support frame, 33 ... Moving part,
34... Support column, 35... Mounting jig, 40... Printed wiring board, 41... Pad portion, 200... Inspection jig.

Claims (1)

[Scope of Claims] 1. By arranging a probe panel having a plurality of probes to face a printed wiring board that is an object to be inspected, and bringing each of the probes into contact with a pad portion of a circuit formed on the printed wiring board. , in a circuit testing device for a printed wiring board configured to test continuity of the circuit, a pair of connection stands are provided on two sides of the probe panel, and connection terminals connected to each of the probes are connected to each of these connection stands. At the same time, a connector panel provided with a plurality of connector pins corresponding to the connection terminals is movably installed to face each of the connection bases, and each of these connector panels is moved toward each of the connection bases by an actuating device. A circuit for a printed wiring board, characterized in that the circuit of the printed wiring board installed on each of the probe panels and the connector pin are electrically connected via the connection terminal. Inspection equipment. 2. The circuit testing device according to claim 1, wherein the connection stand and the connector panel can be aligned with each other by a guide pin provided on either one of them. 3. A pair of probe panels are formed facing each other, and one of the probe panels is movable relative to the other, and the printed wiring board is placed between the pair of probe panels for inspection. A circuit testing device according to claim 1 or 2, characterized in that: