JPH0310174A - Contact deficiency sensing system - Google Patents

Abstract

PURPOSE:To achieve a higher reliability of testing by applying a voltage between a pair of test pins at a contact section to control a system judging a contact condition of the test pins to eliminate erroneous diagnosis caused by a bad contact. CONSTITUTION:First, a printed wiring board PKG desired to be inspected is mounted on a mechanical driving section 3 and a contact section 1 comprising test pins having a pair of test pins with a mechanical driving section 3 is brought into contact with the same test point of the PKG. Then, with a control section 2, it is judged whether a contact between the contact section 1 and the test point is good or bad and when the contact is bad, the mechanical driving section 3 is operated by a signal from the control section 2 to separate the contact section 1 from the PKG. Then, the contact section 1 is brought into contact with the test point of the PKG to judge whether contact with the test point is good or bad. If the contact is good, a signal of the contact section 1 is switched over to a testing section 4 from the control section 2 to perform a test. Then, after the implementing of the test, the PKG is removed to end the test.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a contact failure sensing system, and particularly to a contact failure detection system for sensing a contact failure between one test pin and a PKG.

[,・Conventional technology]

Conventionally, this type of electrical inspection has been performed using one terminal and one terminal as shown in Figure 4.
A group of test pins having a real test bottle was brought into contact with a test point of the PKG, and the test was conducted without confirming whether the contact between the test point and the test bottle was good or bad.

[Problem to be solved by the invention]

The conventional electrical inspection system described above consists of a group of test bins and a PK
Since the test was conducted without checking whether the contact with the G test point was good or bad, if the test result was determined to be defective, it may be NG due to a real defect or NG due to poor contact with the test bottle. If there is any doubt as to whether the test has been completed or not, the test must be repeated from the beginning after the test is completed, which not only has low test reliability, but also requires additional testing time, resulting in low test efficiency.

[Means to solve the problem]

The poor contact detection system of the present invention includes (a) a contact portion having a pair of test pins for one terminal that are electrically insulated and each operating independently; (b) a pair of test pins of the contact portion; a control unit that applies a voltage between the test pins to judge the contact state of the test pins and controls the system; (C) an input drive unit that causes the control unit to bring the PKG and the test pin into contact or apart; (d) a PKG and a test section that conducts the actual test after the test pins have made contact.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram of one embodiment of the present invention.

Electrically isolated and each operates independently1
A contact part IK having a pair of test pins is sent to the terminal from the control part 2, and then a signal indicating the contact state is taken in from the contact part 1 to the control part 2 button. The control unit 2 determines whether the contact portion 1 is securely in contact with the mechanical drive unit 3KPKG, and if the contact is NG, the control unit 2 sends a signal to perform the attachment/detachment operation of the mechanical drive unit 3KPKG, and if the contact is OK, the contact portion l The control unit 2 switches the signal from the test unit 41C to carry out the test.

FIG. 3 is a flowchart showing the operation of FIG. 1.

First, the PKG to be inspected is attached to the mechanical drive unit (St.
ep 1) Use the input drive unit to bring the contact part consisting of the last bin group having a pair of test pins into contact with the same test point on the PKG (Step 2), and then check whether the contact between the contact part and the test point is OK or NG. The control unit determines whether the contact is NG (Step 3), and if the contact is NG, the mechanical moving part is operated by a signal from the control unit to connect the contact part and PK.
Remove G by one step 5 step 4), and then touch the contact part and PKG again.
Contact the test point to determine whether the contact with the test point is OK or NG. If the contact is OK, switch the signal control section of the contact section to the test section and conduct the test (St.
ep5) After the test, remove the PKG (Step
6), the test is finished (Step 7).

FIGS. 2(a) to 2(C) are a longitudinal cross-sectional view and a left and right cross-sectional view of the contact portion shown in FIG. 1.

The contact beam receptacle 9 and the receptacle 13 are connected by an insulating holding part 10 and electrically connected, and the contact pin 8 and the contact pin 14 are each independently connected to a spring 11.
The prevention plate 12 is fixed to the insulating holding part 10 and prevents the contact pin 8 and the contact pin 14 from coming into contact with each other when they come into contact with the test point. .

〔Effect of the invention〕

As explained above, the contact failure feeling completion system of the present invention has the following features:
Unlike conventional inspection systems, which conduct tests without checking for poor contact between busy test pins and PKG test points, testing can be performed by sensing contact signals from the contact points, eliminating errors caused by poor contact. Since there is no need for diagnosis, the reliability of the test is significantly increased, and re-testing to confirm a wrong diagnosis is no longer necessary, which improves the efficiency of testing time, which has the effect of making it possible to automate the PKG inspection process extremely easily. .

[Brief explanation of drawings]

Fig. 1 is a block diagram of an embodiment of the present invention, Fig. 2(a)
~(c) is a vertical cross-sectional view and a left and right cross-sectional view of an example of the contact portion shown in FIG. 1, FIG. 3 is a flowchart of an embodiment of the present invention, and FIG. 4 is a flowchart of a conventional example. . 1...Contact part, 2...Control part, 3...
...Mechanical drive section, 4...Test section, 8...
...Contact pin, 9...Receptacle, 10.
...Insulation holding part, 11...Spring,
12...Shutdown prevention plate, 13...Receptacle, 14...Contact bottle, 15...
··spring.

Claims (1)

[Claims] In a printed wiring board (hereinafter referred to as PKG) assembly electrical inspection tester, an electric signal is applied between a contact part having a pair of spring probes for one contact part, and the pair of spring probes of the contact part, and the electric signal is A control section that senses the electrical signal generated by the result of applying the signal, and a control section that operates based on the signal from the control section, sets the PKG, and connects the contact section and P.
A poor contact detection system consisting of an input drive unit that contacts the KG.