JPS58129270A - Inspecting device for wiring of printed wiring board - Google Patents

Abstract

PURPOSE:To check erroneous wirings easily and surely by inserting connector pins for connection into the holes of printed board for mounting of electronic parts and controlling optical displaying. CONSTITUTION:Connector pins for connection of an inspecting device 1 for wiring is inserted into the holes of a printed board 5 for mounting of parts such as terminals 6a, 6f, 6j to be connected to a ground line GND. Similarly, the connector pins for connection are also inserted into parts holes such as terminals 6e, 6i, 6m to be connected to a power source line VDD. Further, a common connector 3 for the device 1 is connected to the pinholes of the connector pins to be connected to the terminals 6e, 6i, 6m, etc. When in this state the +, - sides of a DC power source are respectively connected to the terminals 6a, 6e, the disconnected part of the line GND is detected by putting out of LEDs 2f, 2j, etc. and the shorting between the line GND and signal lines L1, L2 by lighting of LEDs 2b, 2c-, etc. Similarly, the respective lines are detected and the erroneous wirings of the printed board is checked easily and surely.

Description

[Detailed description of the invention] The present invention relates to a wiring inspection device for pre-selected wiring boards.

Conventionally, a circuit tester or an oscilloscope has been used to check copper foil tin (wiring) connected on a printed wiring board. Therefore, the circuit tester checks the line between two points for continuity or non-continuity.
Although the resistance value etc. can be checked, even if the fin is connected to another line, the connection between the two points is tested as continuity, so there is a drawback that the connection cannot be checked. Ta. Furthermore, since checking can only be performed between two points, checking is time consuming and troublesome.

On the other hand, when checking lines using an oscilloscope, the voltage waveform of each line is checked by applying a predetermined voltage after connecting electronic components to the printed circuit board. In this case, if the line is connected to a wire such as a sheet, a current exceeding the allowable amount may flow through the electronic component, causing damage to the electronic component. Furthermore, the seal on the line -
If there is a problem, an excessive current may flow not only in the electronic components of the printed wiring board but also in the source circuit or one path inside the oscilloscope, causing damage.

This invention was made based on the above circumstances, and its purpose is to provide a printed circuit board that allows customers to easily and quickly check for incorrect wiring without connecting electronic components to the printed circuit board. An object of the present invention is to provide a wiring inspection device.

Hereinafter, FIGS. 1 to 715 will be explained regarding one embodiment of this invention.
! 1m based on J! I will clarify. Figure 1 shows the layout according to the present application.
A perspective view of an IiA inspection device 1 is shown, and this device 1 is an IiA inspection device 1.
It has the same external shape as the C (collection 1111 circuit) patchage. That is, a pair of light-emitting diodes 2.2 are placed at predetermined intervals at predetermined intervals on both the upper and vertical parts of the device main body L&, which is formed into a rectangular parallelepiped shape from an insulating material such as ceramic. − It is buried with the surface exposed. Further, a common connection pin 3 as a connection electrode terminal is led out from the lateral surface of the device main body 1m. Furthermore, on the vertical 'kllI1 surface of the device body 1&,
A pair of connecting connector pins 4.4 are provided at predetermined intervals, corresponding to the light emitting diodes 2.2, respectively.
Continuation of this wI] Nectabin 4 has a conductive metal attached part with the common! ! i2 Bin hole 4 & for inserting the connecting bottle 3
is provided.

FIG. 2 shows a cross-sectional view of the wiring inspection device, and one electrode of each of the light emitting diodes 2 is connected to the corresponding connector pin 4 for connection. Furthermore, the other electrode of each light emitting diode 2 is connected to the common connection bin 3 by a conductive member, respectively.

FIG. 13 shows an internal circuit configuration diagram of the wiring inspection device 1, in which each of the connection connector bins 4 is connected to the 7-node electrode 2m of the corresponding light emitting diode 2, and the cathode electrode 2B of each light emitting diode 20 is connected at once. are interconnected and
Furthermore, it is electrically connected to the common connection bin 3.

FIG. 4 shows a printed wiring board 5 whose wiring is inspected by the wiring inspection device l.

That is, electronic component mounting portions 5ax5bx5o for mounting ICs are provided at predetermined positions on the printed wiring board 5, and these mounting portions 5ax5 and 5.
A mounting hole 6.6 is provided for mounting an IC.

However, when inspecting the wiring of a printed wiring board, each mounting hole 6
into which are inserted the connector pins 4 for each connection of the wiring inspection device l, that is, each electronic component mounting portion 5&, 5b1.
The wiring inspection device 1 is attached to each of the terminals 5 and 5. Then, with the wiring inspection device 1 attached, it is checked whether the wiring of the printed wiring board 50GND (ground) 9in, the VDD twin to which the power supply voltage is applied, and the signal line is correct.

85 to 7 show circuit configuration diagrams for checking the wiring twin of the printed wiring board 5, and each mounting hole 6 of the electronic component mounting portion 5aS5'b, l of the printed wiring board 5 has a diagram. Distribution S inspection device 1 shown by the dot-dash line
．． The connector pins 4 for each connection of 1.1 are inserted. Terminals 6&~6m of each mounting hole 6 of the printed wiring board 5
Openly connected lines shall be inspected. In this case, the printed wiring board 6 is provided with printed wiring as indicated by the reference numeral 7 surrounded by a chain line in the figure. That is, terminals 6&, 6tz 6J are connected to each other to become GND9 in, and terminal 6s
% 61.6 th are connected to each other to form a VDD line, and terminals 6b and 6, terminals 6O and 6h, terminal 6d, terminal 6g, and terminal 6no are connected to each other and correspond to each other. and are wired as signal fins L1, L, , L, respectively.Here, the wiring inspection device 1.1.1
Each of the light emitting diodes 2 will be referred to as light emitting diodes 2 and 2m in correspondence with the terminals 6 and 6m. FIG. 5 shows a circuit configuration diagram when checking the GND line of each twin wired on the printed wiring board 5. In this case, the wiring inspection device 1',
1. Each common connection bin 1 of 1 is inserted into the corresponding bin hole 4a of the connection connector bin 4 electrically connected to the VDD line. On the other hand, the grounded negative electrode of the power source 8 for DC testing is connected to the contact 6. The positive electrode is connected to the connecting connector pin 4 connected to the terminal 6&.

As a result, a closed circuit is formed by the power R8, the light emitting diode 2&, the common connection bin 3, the terminal..., the power supply 8, and the power [1! ,G
ND twin, light emitting diode 2ts connection bin 3,
A closed circuit is formed by the terminal @i, the VDD twin, the power supply 8, the power supply I GND line, the light emitting diode 2t1 common connection bin 3, the terminal 6, the VDD line, and the power supply H$.

Therefore, when the light emitting diodes 2m, 2t, and 2J are all lit, it is determined that the GND line is conductive.

Further, when the light emitting diodes 2 m and 2 f are lit and the light emitting diode 2 j is clear, it is determined that the GND line between the terminal @f and the terminal 6 j is disconnected. In addition, the light emitting diode 2a lights up once and the light emitting diode 2
When the Kiyosumi Io F lights up on f and 2J, it is determined that the GND twin is in alignment with the other twin. For example, when the light emitting diode 2k lights up, the terminal 6o
It is determined that the communication between terminals 6h and 6h is in communication. Furthermore, the light emitting diode 21L turned on,
The conduction state of the GND line can also be determined based on the brightness of 2ts 2J.

FIG. 6 shows a circuit configuration diagram when checking the VDD line of the printed wiring board 5. In this case, each common connection bin 3 of the wiring inspection device 1.1.1 is inserted into the corresponding bin hole 4a of the connection connector bin 4 electrically connected to the GND twin. On the other hand, the negative electrode of the power source 8 is connected to the contact 6&, and the positive electrode is connected to the connecting connector pin 4 electrically connected to the terminal 6.

As a result, the GND line is applied to the GND level, the vDD line is applied to a constant voltage, and the power supply 8 and the light emitting diode 2
・, common connection bin 3, terminal 6a1 closed circuit with power 1gg, voltage $8, vDD line, light emitting diode 21, common 111 connection bin 3, terminal @1゜GND tin, power supply 8
Closed circuit with power supply $, VDD line, light emitting diode 2W1, common 111 connected bin 3, terminal 6 J SG
A closed circuit is constructed.

Therefore, if the light emitting diodes 2., 2J, and 2.0 are all lit, it is determined that the VDD line is conductive. Further, when the light emitting diodes 2 and 2j are lit and the light emitting diode 2 is clear, it is determined that the VDD line between the terminal 6i and the terminal 6 is disconnected. In addition, light emitting diode 2. lights up, and light emitting diode 2J lights up.
, 2m is off, it is determined that the VDD line between terminal 6 and terminal 61 is disconnected. Also, if the light-emitting diodes other than light-emitting diode 2, 24, and 2m are lit. If so, it is determined that the line to which the light emitting diode is connected and VDD9 in are short.

FIG. 7 shows a circuit configuration diagram when checking the signal lines of the printed wiring board 5. in this case,
Each common connection bin 3 of the wiring inspection device 1.1.1 is electrically connected to the GND line 11! Insert into the via hole 4a of the connected connector vial 4. On the other hand, connect the negative electrode of the power source $ to terminal 6&. And terminal 6a
, 111g56I, the positive electrode of the power source 8 is connected to the connecting connector pin 4 electrically connected to the terminal 6.

As a result, the GND line is at the GND level, the voltage of the power supply 8 is applied to the signal tin L, and an M circuit consisting of the power supply 8, two light emitting diodes, the common connection bin 3, the terminal 61, and the power supply 8, and the voltage ms, Signal line L1, light emitting diode 2
J, common J1 [bin 3, terminal 6f, GND line, M circuit with power aS, power supply 8, signal tin L light emitting diode 2j1 common connection bin 3, terminal 6JSGND tin, power supply 8 constitute a closed circuit. .

Therefore, when the light emitting diodes 2t and 2Jq zz are all lit, it is determined that the signal ting L is conductive. Further, when the light emitting diodes 2 and 2j are lit and the light emitting diode 2J is clear, it is determined that the signal line Ls between the terminals 6j and 6j is disconnected. In addition, when light emitting diode 2 is lit and light emitting diodes 2J and 21 are clear, terminal 6 and terminal 6J
It is determined that the signal line L of the connection is disconnected.If the light emitting diode other than 21% 2J% is lit, the twin to which that light emitting diode is connected and the VDD line. It is determined that the seal is stamped. Similarly, when checking the signal 41tq-t's, connect the positive electrode of the power supply 8 to the corresponding terminal 6.
This is done by connecting to the tiI connection connector pin 4 which is electrically connected to +s6o, and visually observing the display at 2 on the light emitting diode 2.

In the above embodiment, the negative electrode of the power source 8 is connected to a terminal electrically connected to the common connection bin 3, but it may be directly connected to the common connection bin 3.

Further, by automatically checking the connection points of the positive and negative electrodes of the power source 8 to the wiring board and the light emitting state of the light emitting diodes, it is possible to automate the inspection of the printed wiring. In this case, it will be more complete if the attachment and detachment of the wiring inspection device 1 to and from the printed circuit board is also automated. In addition, in the above embodiment, a light emitting diode was used as a light emitting element, and although it was provided separately from the wiring inspection device 1, it may be incorporated into the wiring inspection device [1].

As explained above, the present invention is provided with an IM connector pin to be inserted into an electronic component mounting hole formed on a printed wiring board, and one of the IM connector pins provided in the connection connector pin in correspondence with the connection connector pin. Since the structure includes an optical display element to which an electrode is electrically connected and a connecting electrode terminal that is electrically connected to the other electrode of this optical display element, electronic components can be connected to the printed wiring board. Since the section wiring can be checked without having to do anything, electronic components will not be damaged by the checking work.

In addition, you can check wiring all at once by simply attaching a connector pin to the electronic component mounting hole where the IC lead is attached and applying a low voltage, for example, 1.5V battery voltage. The checking work is easy and the checking time can be reduced. In addition, when checking the section and staff, there is an advantage that the seat of MA5&l is also inspected in addition to the inspection for disconnection. In addition, it is cheaper than circuit testers, oscilloscopes, etc., and it is easy to manufacture.In addition, since it is checked optically by the display of the light emitting element, the inspection is simple and clear, and one false check is prevented. can. Furthermore, you can check the display of the light emitting elements by comparing it with the circuit diagram of the printed wiring, or you can check automatically using a phototransistor, etc.
It has the advantage of being able to perform checks in a concentrated manner and reducing the burden on the checker.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of the wiring inspection device of the present invention, and FIG. 2 is a cross-sectional view of the wiring inspection device. ! Figure 3 is an internal circuit configuration diagram of the wiring inspection device, Figure 4 is a perspective view of the printed wiring board, and #Is diagram is the printed layout [G) J of the board.
Circuit I11 diagram when checking the D line, Figure 6 is a circuit configuration diagram when checking the VDD line of the printed circuit board, and Figure 7 is an IgllF+ configuration diagram when checking the signal line of the printed wiring board. It is. 1... Distribution S inspection device, 2... Light emitting diode, 3... Common connection bin, 4...
・Connector pin for connection, 4 &...bin hole, t・
...Printed wiring board, 5a to 50...Electronic component mounting section. Patent applicant: Casio Computer Co., Ltd. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] A connector pin for connection inserted into an electronic component mounting hole carved into a printed wiring board, and a connector pin for connection are provided corresponding to each of the connector pins for connection, respectively. ! An optical display element having one electrode electrically connected to the i connector pin, and a connecting electrode terminal electrically connected to the other electrode of the optical display element, the connecting connector pin and A wiring inspection device for a printed wiring board, characterized in that a voltage is applied between the connecting electrode terminal and the optical display element to display a display, thereby inspecting the wiring state of the printed wiring board.