JP3214526B2 - Inspection equipment for printed wiring boards - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inspection apparatus for a printed wiring board, and more particularly to an inspection apparatus having excellent workability of wiring between a detection unit and an inspection device.

[0002]

2. Description of the Related Art Various methods have been proposed for inspecting a wiring circuit on a printed wiring board based on the presence or absence of electrical continuity, and an apparatus therefor (for example, Japanese Patent Application Publication No. Hei.
44035, JP-A-56-11060). As shown in FIG. 4, a conventionally used printed wiring board inspection apparatus 1 applies a contact pin 91 of a detection unit 9 to a wiring circuit 71 of a printed wiring board 7.
Are contacted to check for electrical continuity.

The contact pins 91 are provided on a guide plate 90.
Is mounted in the guide hole 901 so as to be able to advance and retreat. Then, the detection signal is taken out from the terminal pin 94 of the back board 93 provided on the opposite side of the guide plate 90 of the detection unit 9 and connected to the inspection device 18.

A relay housing 92 for relaying a signal between the contact pin 91 and the terminal pin 94 is provided between the guide plate 90 and the back board 93. The relay housing 92 includes a contact pin 91.
For example, a signal relay member 95 made of a stretchable conductive elastic member as shown in FIG. 4 is provided so that the signal does not intermittently move even if it moves forward and backward in the guide hole 901. Alternatively, as shown in FIG. 2, which will be described later, a relay probe 47 having a relay pin 471 that can be advanced and retracted by an elastic member (not shown) is provided in the relay housing 45.

On the other hand, as shown in FIG.
A relay panel 97 is provided between the inspection device 18 and the inspection device 18. The relay board 97 collects a large number of lead wires 98 connected to terminal pins 94 arranged irregularly on the rear board 93 and connects them to the inspection device 18. The lead wires 98 gathered in the relay board 97 are bundled or cabled and connected to the inspection device 18. In FIG. 4, reference numeral 181 denotes a display of an inspection device, and reference numeral 991 denotes a display.
Is a knock pin for connection, and reference numeral 931 is a pin hole for receiving the terminal pin 94.

[0006]

However, the conventional printed wiring board inspection apparatus has the following problems. That is, as the density and integration of the printed wiring board increase, the number of the lead wires 98 has reached hundreds to thousands. However, since the wiring between the rear board 93 and the relay board 97 must be performed one by one for each corresponding predetermined position, at present, it is necessary to rely on manual labor.

[0007] The rear board is composed of a single board, and wiring is performed by one worker. Therefore, there is a problem that the lead time of the wiring process in the production lead time of the above-described inspection apparatus, particularly, the lead time of the wiring process between the back board 93 of the detection unit 9 and the relay board 97 is long.

On the other hand, as the density of printed wiring boards has increased, the number of inspection points on the printed wiring boards has increased, and the number of terminal pins and their density have also increased. As described above, the lead time of the wiring process between the rear board 93 and the relay board 97 increases in proportion to the increase in the density of the printed wiring, which is a major cause of the increase in the overall manufacturing lead time of the inspection apparatus. I have. SUMMARY OF THE INVENTION In view of the above problems, the present invention provides a printed wiring board in which the production lead time of a wiring process between a relay board and a detection unit does not increase in proportion to the density of a printed wiring board to be inspected. It is intended to provide a board inspection device.

[0009]

The present invention relates to an inspection apparatus for inspecting a wiring circuit on a printed wiring board based on the presence or absence of electrical continuity. The inspection apparatus includes a detection unit having a contact pin for making contact with the wiring circuit. A detection unit for receiving a detection signal from the detection unit to determine the quality of the wiring circuit; and a relay board for relaying the detection unit and the inspection unit. The detection unit moves the contact pin forward and backward. A guide plate having a guide hole to be mounted so as to be mounted, a back board having a terminal pin for extracting a contact pin detection signal, and the contact pin and the terminal pin being disposed between the back board and the guide plate. The relay board has a detection terminal connected to the terminal pin via a lead wire, and an inspection terminal connected to the inspection device. Back board of the detector may be configured by a plurality of unit boards to allow disassembly and reassembly in the inspection apparatus of printed wiring board according to claim.

The most remarkable point of the present invention is that the rear board for extracting the detection signal from the detecting section is constituted by a plurality of unit boards, and the rear board is disassembled into the unit boards and reassembled. It is possible. Terminal pins connected to the contact pins are provided on the rear board, and the terminal pins are connected to the detection-side terminals of the relay board.

It is preferable that the detection-side terminal of the relay board is constituted by a plurality of terminal blocks, and each of the terminal blocks is connected to only one unit board of the rear board. The reason is as follows. According to the above configuration, the terminal block of the detection side terminal of the relay board can be divided for each unit board on the rear board.

Therefore, wiring work between the rear board and the relay board can be performed separately for each wiring work between each unit board and the corresponding terminal block. Then, after wiring work is performed separately, each is integrated with the rear board and the relay board to complete the whole. Therefore, the wiring work can be separated, and the lead time of the wiring work can be reduced.

If the printed wiring boards of different types can be divided into a common part having a common wiring pattern and a different part having a different wiring pattern, the common part can be divided into an independent unit board and a terminal block. This is preferable because it can be shared by both printed wiring boards.

[0014]

Operation and effect The rear board according to the present invention is constituted by a unit board which can be disassembled and reassembled.
Therefore, if the rear board is disassembled into unit boards and the wiring work between each unit board and the relay board is performed, the wiring work between the rear board and the relay board can be performed simultaneously.
It can be divided into several people and performed in parallel by division of labor. Then, after the wiring work between each unit board and the relay board is completed, each unit board can be assembled integrally to complete the rear board.

That is, when there are a plurality of unit boards, for example, there are n unit boards, the total lead time of the wiring work of the unit boards is reduced to about 1 / n as compared with the case where the unit boards are not formed. As a result, the lead time of the assembling work on the rear board is slightly added.

Since the man-hour for assembling the unit board to the back board is relatively smaller than the man-hour for wiring, the lead time for wiring on the back board is greatly reduced. As described above, according to the present invention, even when the density of the printed wiring board to be inspected is increased, the production lead time of the wiring process between the inspection device and the detection unit is not prolonged proportionally. An inspection device for a wiring board can be provided.

[0017]

【Example】

Embodiment 1 An inspection apparatus for a printed wiring board according to an embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 2, this example is an inspection apparatus 1 for inspecting a wiring circuit 71 of a printed wiring board 7 based on the presence or absence of electrical continuity.
Is a detection unit 10 having a contact pin 41 for making contact with the wiring circuit 71, and an inspection device 18 which receives a detection signal from the detection unit 10 and determines the quality of the wiring circuit 71.
And a relay panel 30 for relaying the detection unit 10 and the inspection device 18.

The detection unit 10 is provided with the contact pins 4
A back plate 20 provided with a guide plate 40 provided with a guide hole 42 in which the base plate 1 is removably mounted, a terminal pin 26 for extracting a detection signal of the contact pin 41, and a back board 2
0 and the guide plate 40, the relay housing 4 connecting the contact pins 41 and the terminal pins 26.
5 is provided.

The relay board 30 includes a detection terminal 31 connected to the terminal pin 26 via the lead wire 15.
And an inspection-side terminal (not shown) connected to the inspection device 18. As shown in FIG. 1, the rear board 20 is composed of a plurality of unit boards 21 to 23, and the rear board 20 is composed of the unit boards 21 to 23.
23 is configured to be disassembled and reassembled.

Hereinafter, each of them will be described in detail. Detector 1
0 indicates the guide plate 40 and the rear board 2 as shown in FIG.
0 and a relay housing 45,
0 and 45 are connected by a knock pin 101. A large number of contact pins 41 that are in contact with the wiring circuit 71 of the printed wiring board 7 are mounted on the guide plate 40, and the contact pins 41 advance and retreat along the guide holes 42.

On the other hand, a relay probe 47 corresponding to the contact pin 41 is mounted on the relay housing 45. An advanceable / retractable relay pin 471 is mounted at the tip of the relay probe 47, and is urged outward (toward the contact pin 41) by an elastic member (not shown) accommodated in the relay probe 47. .

The relay pin 471 is a contact pin 41
And presses the contact pin 41 outward in contact with the head 412. Then, the detecting unit 10 is moved so that the pin end 411 of the contact pin 41 is
The contact pin 41 and the relay pin 471 recede, and the wiring circuit 71 and the pin end 411 of the contact pin 41 are pressed by the urging force of the elastic member to secure electrical continuity. You.

On the other hand, an upper end portion 472 of the relay probe 47 protrudes from the other end surface of the relay housing 45.
The knocking pin 101 is in contact with the bottom surface 261 of the terminal pin 26 of the rear board 20 due to the coupling force of the knock pin 101.

Further, a pin hole 27 is formed in the rear board 20, and the terminal pin 26 is accommodated in the pin hole 27. The terminal pin 26 has its bottom surface 261 in contact with the upper end portion 472 of the relay probe 47 and a terminal portion 262 for connecting the lead wire 15 to the upper surface 2 of the rear board 20.
It is caught from 01. The lead wire 15 is about 2
000 wires.

As shown in FIG. 1, the terminal 262 of the terminal pin 26 is soldered to the lead wire 15, and the other end of the lead wire 15 is connected to the detection terminal 31 of the relay board 30. ing.

The rear board 20 is provided with mounting screws 202.
Unit boards 21 and 2 screwed by
The rear board 20 can be disassembled into three unit boards 21 to 23. Also, this is reassembled by screwing and the original back board 2
It is possible to build up to zero.

On the other hand, the detection terminal 31 of the relay board 30 is internally connected to the inspection terminal, and the inspection terminal is connected to the cable 1.
6 is connected to the inspection device 18. The connection between the detection-side terminal 31 and the inspection-side terminal and the cable connection between the inspection-side terminal and the inspection device 18 have standardized wiring patterns, thereby reducing the number of wiring steps and the lead time. . In FIG. 2, reference numeral 102 denotes a knock hole through which the knock pin 101 is inserted.

Next, the printed wiring board inspection apparatus 1 of the present embodiment.
The operation and effect of will be described. In the inspection apparatus 1 of the present embodiment, as shown in FIG. 1, the back board 20 is composed of three unit boards 21 to 23, and can be divided into these unit boards 21 to 23. Therefore, although the connection of the lead wires 15 is a large number of about 2000, each of the unit boards 21 to 21 is connected.
It is possible to work separately at the same time every 23 hours.

After connecting the lead wires 15 to the respective unit boards 21 to 23, the respective unit boards 2 to 23 are connected.
The rear boards 20 are completed by reassembling 1 to 23. As described above, in the inspection apparatus 1 of the present embodiment, the wiring work between the rear board 20 and the relay board 30 that occupies most of the wiring process and cannot be standardized can be performed simultaneously by division of labor. Therefore, the lead time of the wiring process can be reduced.

As described above, according to this embodiment, even if the density of the printed wiring board 7 to be inspected is increased, the production lead time of the wiring process between the inspection device 18 and the detection unit 10 is prolonged in proportion thereto. Inspection apparatus 1 for printed wiring board 7
Can be provided.

Embodiment 2 In this embodiment, as shown in FIG. 3, the rear board 20 is composed of two unit boards 24 and 25 in the first embodiment, and the detection side terminals 32 of the relay panel 30 are a plurality of terminals. In this example, the terminal blocks 33 to 36 are connected to only one of the first unit board 24 and the second unit board 25.

As shown in FIG. 3, the inspection apparatus 1 of this embodiment
The back board 20 includes a first unit board 24 and a second unit board 25, and the respective unit boards 24, 25 are detachable with mounting screws. In addition, the relay panel 30 includes left and right side plates 301 and 302.
And a ceiling plate 303 connecting both side plates 301 and 302. The relay panel 30 is attached to the rear board 20 by screwing the both side plates 301 and 302 with set screws 304.

Then, both side plates 301, 30 of the relay panel 30
2, two wrapping terminal blocks 33 to 36 each serving as the detection-side terminal 32 and the inspection-side terminal 39 are attached. The terminals on the detection unit side of the first and second terminal blocks 33 and 34 attached to the left side plate 301 are connected to the first unit board 24 by the lead wires 15.

On the other hand, the terminals on the detection section side of the third and fourth terminal blocks 35 and 36 attached to the right side plate 302 are connected to the second unit board 25 by the lead wires 15. The inspection-side terminal 39 of the first and second terminal blocks 33 and 34 is connected to the first cable 1 connected to the inspection device 18.
The inspection side terminal 39 of the third and fourth terminal blocks 35 and 36 is connected to the second cable 162 connected to the inspection device 18.

In this embodiment, the terminal blocks 33 to 36 of the relay board 30 and the unit board 24 of the rear board 20
25, there is a correspondence relationship, and the connection destination of each terminal block 33-36 is a single unit board 24,
It is limited to 25. Therefore, the unit board 24,
The wiring work between the terminal blocks 33 to 36 can be performed completely independently for every 25. Therefore, the above wiring work can be performed in parallel by division of labor, so that the lead time can be reduced by almost half.

Also, even though printed wiring boards of different types can be often seen, the wiring pattern can be divided into a common wiring pattern portion and a different wiring pattern portion. In such a case, the unit boards 24 and 25 are divided into a part corresponding to the common part and a part corresponding to the different wiring pattern part, so that the unit board corresponding to the common part and its terminal are divided. It can be shared between printed wiring boards different from blocks. As a result, cost reduction and lead time reduction can be realized together. Others are the same as in the first embodiment.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a wiring state between a rear board and a relay board of an inspection device of a first embodiment.

FIG. 2 is an overall explanatory diagram of the inspection apparatus according to the first embodiment.

FIG. 3 is an explanatory diagram of a wiring state between a rear board and a relay board of the inspection device according to the second embodiment.

FIG. 4 is an overall explanatory view of a conventional inspection apparatus.

[Explanation of symbols]

 1. . . Inspection device, 10. . . Detection unit, 18. . . Inspection device, 20. . . Back board, 21-25. . . Unit board, 26. . . Terminal pins, 30. . . Relay board, 40. . . Guide plate, 41. . . Contact pin, 42. . . Guide hole, 45. . . 6. relay housing, . . Printed wiring board, 71. . . Wiring circuit,

Claims (2)

(57) [Claims] 1. An inspection apparatus for inspecting a wiring circuit on a printed wiring board based on the presence or absence of electrical continuity, the inspection apparatus comprising: a detecting unit having a contact pin for making contact with the wiring circuit; An inspection device that receives the detection signal and determines the quality of the wiring circuit, and a relay board that relays the detection unit and the inspection device, wherein the detection unit is a guide for mounting the contact pins so as to be able to move forward and backward. A back board provided with a guide plate having a hole, a terminal pin for taking out a contact pin detection signal, and a relay housing provided between the back board and the guide plate and connecting the contact pin and the terminal pin; The relay board has a detection terminal connected to the terminal pin via a lead wire, and an inspection terminal connected to the inspection device. An inspection apparatus for a printed wiring board, characterized in that the surface board is constituted by a plurality of unit boards so as to be disassembled and reassembled. 2. The terminal according to claim 1, wherein the terminal on the detection side of the relay board comprises a plurality of terminal blocks.
Each of the terminal blocks is connected to only one of the unit boards on the back board.