JP3693353B2 - Electrical inspection machine for printed wiring boards - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to an electric inspection machine for a printed wiring board that performs continuity inspection of a wiring pattern formed on the printed wiring board.
[0002]
[Prior art]
A conventional electrical inspection machine for printed wiring boards will be described below with reference to the drawings.
[0003]
FIG. 2 is a perspective view schematically showing the structure of a conventional electrical inspection machine for printed wiring boards. In FIG. 2, 1 is a printed wiring board having lands 2 formed on the main plane, 4 is a printed wiring board 1. This is an inspection section in which a pair of contact pins 3 are implanted in the upper part on the upper surface side.
[0004]
In the conventional electric inspection machine for printed wiring boards configured as described above, the printed wiring board 1 is fixed at a fixed position by a holding part (both not shown) attached to the main body of the inspection machine, and the inspection part 4 is lowered. By doing so, the pair of contact pins 3 are brought into contact with both ends of the land 2 formed on the printed wiring board 1, and the conduction state is inspected.
[0005]
[Problems to be solved by the invention]
However, in the conventional electrical inspection machine for printed wiring boards, when it is determined that the disconnection is defective as a result of the inspection, the cause is the failure of the land 2 of the printed wiring board 1 or the land 2 is normal. Regardless, the cause of contact failure due to dirt or the contact pin 3 being inclined is not clear, and the cause is not clear whether it is an apparent pseudo failure, and the method is difficult even if it is attempted to confirm further. It had the subject of being.
[0006]
The present invention solves the above-described conventional problems, and provides an electrical inspection machine for a printed wiring board that can accurately and quickly determine the content of a failure when it is determined that a disconnection failure has occurred after inspection. It is the purpose.
[0007]
[Means for Solving the Problems]
In order to solve the above problems, a printed wiring board inspection machine according to the present invention has a holding part for holding a printed wiring board and a pair of contact pins for inspecting the continuity of a wiring pattern formed on the printed wiring board. An inspection unit located on the printed wiring board and connected to the main body so as to move up and down, and a defect based on the address entered when the inspection unit inspects the printed wiring board and determines that it is defective. A recognition camera that displays the wiring pattern of the inspection part and the printed wiring board by moving to the determined position, whether or not dust adheres to the land of the printed wiring board and the contact pin, and the land And whether or not the relative position of the contact pin is aligned, and whether the contact pin is bent or inclined A determination unit that makes it possible to make a determination by projecting an inspection unit and a printed wiring board by a recognition camera, and the printed wiring board when the determination unit is operated by an input address and it is determined that there is an abnormality in the conduction state An operation unit that moves to stop at a defective point between the inspection units, and a monitor unit that is connected to the recognition camera and projects the contact pins of the inspection unit and the corresponding wiring pattern land of the printed wiring board. It is set as the structure provided with.
[0008]
[Action]
With this configuration, when there is an abnormality in the conduction state of the land formed on the printed wiring board and it is judged that the disconnection is defective, the corresponding land part and contact pin can be displayed on the monitor by the recognition camera, and the operator can monitor the monitor. Thus, the defective portion can be visually confirmed, and the content and cause of the failure can be determined accurately and quickly.
[0009]
【Example】
Hereinafter, an electrical inspection machine for printed wiring boards according to an embodiment of the present invention will be described with reference to the drawings. Note that parts having the same configuration as the conventional example are given the same numbers.
[0010]
FIG. 1 is a perspective view schematically showing a configuration of an electrical inspection machine for a printed wiring board according to the embodiment. In FIG. 1, 1 is a printed wiring board having lands 2 formed on a main plane, and 4 is the printed wiring board. This is an inspection section that is arranged on the upper surface of the plate 1 and has a pair of contact pins 3 implanted therein.
[0011]
Reference numeral 6 denotes a determination unit in which the recognition camera 5 is coupled to the end, and one end is coupled to the main body (not shown), and is moved to the upper surface of the printed wiring board 1 by the operation unit 9 when necessary. It is configured as follows.
[0012]
Reference numerals 7 and 8 denote a monitor part A and a monitor part B connected to the recognition camera 5. In the figure, the monitor part A7 shows a land 2 and the monitor part B8 shows a contact pin 3.
[0013]
The electrical inspection machine for a printed wiring board of the present invention configured as described above fixes the printed wiring board 1 at a fixed position by a holding part (both not shown) attached to the main body of the inspection machine. The contact pins 3 are brought into contact with both end portions of the lands 2 formed on the printed wiring board 1 by being lowered, and the inspection is performed.
[0014]
At the time of this inspection, for example, when it is determined that there is an abnormality in the conduction state of the land 2 and the disconnection is defective, the inspection unit 4 rises and leaves the printed wiring board 1, and at the same time, the operation unit 9 functions, and the determination unit 6 moves and stops between the printed wiring board 1 and the inspection unit 4. The recognition camera 5 coupled to one end of the determination unit 6 projects the land 2 on the printed wiring board 1 on the monitor unit A7 and the contact pin 3 implanted in the inspection unit 4 on the monitor unit B8.
[0015]
Therefore, the operator looks at the land 2 and the contact pin 3 displayed on the monitor unit A7 and the monitor unit B8, so that no dust or the like is attached to the land 2 or the contact pin 3, or the land 2 and the contact pin 3 It is possible to easily check visually whether the relative position of 3 is correct, or whether the contact pin 3 is bent or tilted, and accurately and quickly determine the content and cause of the failure. Will be able to.
[0016]
【The invention's effect】
As described above, the electrical inspection machine for a printed wiring board according to the present invention projects the land on the printed wiring board and the contact pin implanted in the inspection section on the monitor by the recognition camera, so that the operator can visually check the cause of the defect. This makes it possible to check the contents and causes of defects accurately and quickly. In particular, it has a great practical effect in elucidating the causes of defects in printed wiring boards that will become increasingly dense in the future. is there.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a main part of a configuration of an electrical inspection machine for printed wiring boards according to an embodiment of the present invention. FIG. 2 is a perspective view showing a main part of a configuration of a conventional electrical inspection machine for printed wiring boards. Description】
DESCRIPTION OF SYMBOLS 1 Printed wiring board 2 Land 3 Contact pin 4 Inspection part 5 Recognition camera 6 Determination part 7 Monitor part A
8 Monitor part B
9 Operation part

Claims (1)

A holding section for holding a printed wiring board;
An inspection unit that is connected to the main body so as to be placed up and down on the printed wiring board by planting a pair of contact pins for inspecting the continuity of the wiring pattern formed on the printed wiring board;
Comprising a recognition camera for projecting the wiring pattern of the test section and the printed circuit board the measurement part is moved position to which it is determined to be defective based on the input address when it is determined that failure inspects the printed circuit board, Whether dust is attached to the land of the printed wiring board and the contact pin, whether the relative position of the land and the contact pin is correct, and whether the contact pin is bent or inclined A determination unit that enables determination by projecting an inspection unit and a printed wiring board by the recognition camera as to whether or not,
An operation unit for moving to stop the failure point between the printed wiring board and the inspection unit when it is determined that the determination unit by operating the input address is abnormal in a conductive state,
An electrical inspection machine for a printed wiring board, which is connected to the recognition camera and includes a monitor part that projects contact pins of the inspection part and a land of a wiring pattern of the printed wiring board corresponding thereto .

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