JPH0618598A - Printed wiring board inspection jig - Google Patents

Abstract

PURPOSE:To obtain such a printed wiring board inspection jig that the tracers of its probes can be reduced in diameter and can be prevented from being damaged and the probes can be easily connected to an inspection device, and then, its probes and contact pins can be reutilized. CONSTITUTION:The title jig is composed of contact pins 3 mounted on a guide plate 8 and probes 1 inserted into a pin board 88. Tracers 2 are mounted on the probes 1 in a state where the tracers 2 can flexibly advance and retreat. The tracers 2 are brought into contact with the head sections of the contact pins 3. A connector board 19 and terminal board 4 are provided between an inspection device 18 and the probes 1. Lead wires 15 connected to the probes through the terminal board 4 and lead wires 16 connected to the connector board 19 are connected to each other by means of repeating connectors 5. A wiring circuit 71 is inspected while the contact pins 3 are brought into contact with the circuit 71.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jig for a printed wiring board, in particular, a structure around a probe that exhibits an excellent effect on the inspection of a high-density wiring circuit, and electrical connection and disconnection with an inspection device. The present invention relates to a structure around a terminal board that facilitates and.

[0002]

2. Description of the Related Art As a method for inspecting a wiring circuit on a printed wiring board for the presence or absence of electrical continuity and its apparatus, various types have been proposed (for example, Japanese Patent Publication No.
No. 44035, JP-A-56-11060). As a conventional inspection jig for a printed wiring board, a stylus 92 of a probe 9 is brought into contact with a wiring circuit 75 of the printed wiring board 7 as shown in FIGS. 13 and 14. Is used to inspect for electrical continuity.

The inspection jig comprises a guide plate 8 for preventing rattling of the tip of the probe, a pin board 88 for holding the probe 9, and a probe 9 mounted through both of them. As shown in FIG. 14, the probe 9 has a pipe-shaped socket 91 and a stylus 92.
The socket 91 is inserted and fixed in the through hole 881 of the pin board 88. On the other hand, the stylus 92 is inserted into the guide hole 81 of the guide plate 8 so as to be movable back and forth. The stylus 92 has a plunger 920 on its upper part. The plunger 920 is mounted in the inner cavity of the tube 25 so as to be able to move forward and backward via a spring spring (not shown).

The upper end of the probe 9 is electrically connected to an inspection device for detecting electrical continuity via a lead wire. In this case, the upper end of the probe and the lead wire are often connected by soldering.
The guide plate 8 has a recess 82 for disposing the lower end of the socket 91. Further, the probe 9 is provided at a position corresponding to the wiring circuit 75 of the printed wiring board 7 as the inspection object. In addition, the guide plate 8 and the pin board 8
8 is fixed integrally.

When inspecting the electrical continuity of the wiring circuit, the guide plate 8 is placed from above and below the printed wiring board 7.
Also, the pin board 88 is lowered and raised, and the stylus 92 of the probe 9 is brought into contact with the stylus pad (hereinafter omitted) of the wiring circuit 75. At this time, when the wiring circuit 75 is not broken or short-circuited, normal electrical conduction is obtained. As a result, the quality of each wiring circuit 75 can be determined.

Further, in the above, the tip 921 of the stylus 92 is used.
When contacting the wiring circuit 75, the stylus 92 retracts toward the socket 91 side along the guide hole 81 of the guide plate 8,
The plunger 920 penetrates into the socket 91.
This is to protect the tip 921 of the stylus 92.
In FIG. 13, reference numerals 87 and 886 are insertion holes for the knock pin 891, and 871 and 885 are positioning pins 89.
2 insertion holes.

[0007]

[Problems to be Solved] However, the above-described conventional inspection jig has the following problems. That is, in recent years, the density of wiring circuits in printed wiring boards has increased, and the pitch of the pads at the ends of the wiring circuits has become narrower.
For example, this pitch was conventionally about 0.65 mm, but in a high-density wiring circuit it is as narrow as 0.3 mm.

Therefore, in order to deal with this, the probe 9
Since it is necessary to reduce the array pitch of, the size (diameter) of the probe itself must be reduced. Also in the probe 9 currently used, the outer diameter of the socket 91 is about 1 mm, and the diameter of the probe 92 is as small as 0.5 mm.

In the conventional inspection jig, the tip 921 of the stylus 92 is directly connected to the wiring circuit 75 in the inspection.
Abutting against. Further, at the time of contact, the stylus 92 slides in the guide hole 81 of the guide plate 8 and retracts as described above. Then, after the inspection, the stylus 92 is made to project again to its original position by the spring spring provided in the socket 91. Therefore, the stylus 92 slides in the guide hole 81 at each inspection.

Therefore, the stylus 92 is easily worn. Further, if the diameter of the guide hole 81 is increased to prevent this wear, the clearance between the stylus 92 and the stylus 92 becomes large, and the tip 921 of the stylus 92 may rattle, resulting in defective inspection. Further, the stylus 92 is inserted into a socket 91 fixed to the pin board 88. Therefore, the socket 91, the stylus 92, and the guide hole 81 must have the same axis. Therefore, in order to smoothly slide the small-diameter stylus 92, the guide hole 81 needs to be drilled with high dimensional accuracy so that the shaft cores coincide with each other.

Further, the stylus 92 slides coaxially in the socket 91 and the guide hole 81, and the tip 921 of the stylus 92 directly contacts the wiring circuit 75. It is easily damaged. As described above, in the conventional inspection jig, as the wiring circuit becomes higher in density, there are problems particularly in the thinning and damage of the probe stylus 92 of the probe, the drilling accuracy of the guide hole 81, and the like.

Further, the upper end of the probe is electrically connected to the inspection device via the lead wire, and the inspection circuit is electrically closed. And conventionally, several tens to several thousands
The upper end of a large number of probes, such as a book, and the lead wire are connected by soldering, and the other end of the lead wire is connected to the inspection device.

On the other hand, since the array pattern of the probes changes every time the printed wiring board changes, the so-called detection section around the probes needs to be replaced for each printed wiring board. Therefore, at the time of this replacement, a large number of solders between the probe and the lead wire must be removed,
The removal work requires a large number of man-hours. Also, many lead wires and probes must be soldered again according to the new inspection circuit.

Further, since the probe is a small diameter part as described above, it is an expensive precision machined part. Therefore, it is costly to use a new probe every time the wiring circuit of the device under test changes. Therefore, it is also desired that the probe can be reused. In view of the above-mentioned conventional problems, the present invention provides a printed wiring board that can cope with a reduction in the diameter of a probe stylus and prevent damage, is easy to electrically connect to and disconnect from an inspection device, and can reuse a probe. It is intended to provide an inspection jig.

[0015]

The present invention is an inspection jig for inspecting a wiring circuit in a printed wiring board according to the presence or absence of electrical continuity, the inspection jig including a guide plate, a pin board and the wiring circuit. The probe includes a contact pin for making contact with the probe and a probe having a stylus for making contact with the contact pin. The contact pin is attached to the guide plate so as to be movable back and forth. It has a terminal board, a lead wire, and a lead wire between the connector board connected to the inspector and the probe, and the terminal board has a pin hole facing the probe terminal. The lead wire has a terminal pin attached to the pin hole of the terminal board at one end and a conductor exposed portion at the other end. The lead wire has a connector at one end. The other end with being connected to the board in inspection jig of a printed wiring board and having a relay connector that can attach and detach the lead wires.

The first point that is most noticeable in the present invention is that the probe of the above-mentioned conventional example is divided into two sets, so to speak,
The contact pin and the probe are configured, and the contact pin is brought into contact with the wiring circuit while the stylus of the probe is brought into contact with the contact pin.

That is, contact pins are attached to a guide plate facing the printed wiring board so as to be able to move forward and backward, and a probe is fixed to the pin board facing the guide plate. And
A stylus is incorporated in the probe so as to be elastically movable back and forth.
Thus, as a means for incorporating the stylus, there is a means for elastically holding the stylus in the tube and mounting these in the socket (see FIGS. 4 and 5). There is also a means for elastically holding the probe by inserting a direct contact needle into the probe. There is a spring spring as the elastically holding means.

Further, the contact pin is mounted in the guide hole of the guide plate so as to be able to move back and forth. The contact pin has a tip that abuts on the wiring circuit, and an abutting portion that abuts the stylus on the opposite side. The abutting portion preferably has a head portion having a larger diameter than the main body of the contact pin. Further, it is preferable to provide a curved surface concave portion at the contact portion to ensure contact of the stylus (see FIG. 6).

In addition, in the inspection jig of the present invention, the guide plate and the pin board are provided with the contact pins and the probe having the above-mentioned configuration according to the present invention, and in order to inspect a portion where the wiring circuit of the printed wiring board is not dense It is also possible to install a relatively large probe pin similar to the above-mentioned conventional example.

Another point to be noted in the present invention is that, as means for electrically connecting the probe and the inspector, a terminal board and a lead are provided between the connector board connected to the inspector and the probe. The wire and the lead wire are provided for connection, and the relay connector is attached to the lead wire.

That is, a terminal board that is attachable to and detachable from the pin board is provided outside the pin board. A terminal pin is attached to the pin hole of the terminal board, and when the terminal board is attached to the pin board, the probe terminal of the probe and the terminal pin come into contact with each other so that they are connected to each other. The lead wire has one end connected to the terminal pin and the other end having a conductor exposed portion.

On the other hand, a connector board is provided outside the inspection device, and the connector board is connected to the detection signal input terminal of the inspection device. In addition, one end of the lead wire is connected to the connector board, and a relay connector is attached to the other end. The relay connector has a structure in which the exposed conductor portion of the lead wire can be attached and detached.

The relay connector is preferably provided with a display for identifying the terminal number or terminal position of the connector board to which the lead wire is connected. The display includes colors, letters, numbers, symbols, uneven patterns, and identification marks such as the length and sectional shape of the relay connector itself. As a result, the work of connecting the lead wires to each other becomes easy and erroneous connection can be prevented.

[0024]

In the inspection jig of the present invention, contact pins are provided on the guide plate and probes are provided on the pin board.
The contact pin is brought into contact with the wiring circuit of the printed wiring board, and the stylus of the probe is brought into contact with the contact pin. That is, in the present invention, a portion (contact pin) that slides in the guide hole and comes into contact with the wiring circuit and a probe that is a detection end of electrical conduction are divided into two parts. Therefore, the contact pin advance / retreat and the probe stylus advance / retreat are independent.

Therefore, it is not necessary to precisely match the three axes of the probe fixed to the pin board, the stylus inserted therein, and the guide hole of the guide plate through which the contact pin advances and retracts. Therefore, it is sufficient that the axial center of the guide hole is drilled in conformity with the wiring circuit of the printed wiring board, and high precision is not required as in the conventional case, and the drilling is easy. Further, since it is sufficient that only the contact pin can be smoothly slid in the guide hole, it is possible to provide the guide hole with a small diameter and reduce the rattling of the contact pin. Further, when the contact pin is worn, it can be replaced easily and at low cost.

Since the probe is not directly brought into contact with the wiring circuit, it is not damaged as in the conventional case.
Moreover, the contact pin slides in the guide hole by directly contacting the wiring circuit, but unlike the conventional probe stylus, it does not move back and forth linearly in both the guide hole and the socket of the probe. It is not damaged by misalignment.

Further, as described above, since the contact pin and the probe are separately configured so as to prevent the forward movement and the backward movement of both of them at the time of inspection, both of them can be thinned. Therefore, it is easy to inspect high-density wiring circuits. Moreover, the probe is elastically mounted in a socket having a small inner diameter of 0.1 to 0.3 mm so as to be able to move forward and backward. Therefore, although it is an expensive precision part, it is not damaged as described above, so the cost of the inspection jig is also low.

Further, in the inspection jig of the present invention, it is easy to electrically connect the inspection device and the so-called detection portion around the probe. That is, as described above, the terminal pin attached to the lead wire is connected to the probe terminal, and the lead wire is connected to the inspection device via the connector board. Therefore, by attaching / detaching the exposed conductor portion of the lead wire to / from the relay connector to which the lead wire is connected, the inspection device and the probe can be easily connected or disconnected.

Further, since the connection of the relay connector and the lead wire is made by the connector, the connecting work is extremely easy as compared with the attachment / detachment by soldering. Therefore, it is extremely easy to replace the detection unit when the printed wiring board to be inspected is changed. Further, in the present invention, the probe and the terminal pin are pressure-contacted and connected, and no wire or the like was attached to the probe. That is, by removing the terminal board from the pin board, the upper part of the probe is opened and there is no obstacle. Therefore, it is easy to remove the probe from the pinboard.

Further, the contact pin can be easily removed as described above. Therefore, it is a precision-machined component, and it is easy to remove the expensive probe and contact pin from the pin board and the guide plate, attach them to other detecting parts, and reuse them. Therefore, according to the present invention, it is possible to reduce the diameter of the stylus of the probe and prevent the damage, and to easily connect and disconnect the probe from the inspection device and reuse the probe and the contact pin. A plate inspection jig can be provided.

[0031]

【Example】

Example 1 An inspection jig for a printed wiring board according to an example of the present invention will be described with reference to FIGS. In addition, the whole structure is such that the contact pin 3 is brought into contact with the printed wiring board 7 to transmit a signal to the upper end of the probe 1, the lead wire 15 from the upper end of the probe 1, the relay connector 5,
Inspection device 1 via lead wire 16 and connector board 19
8 will be described separately.

As shown in FIGS. 1 to 3, the detection portion of the inspection jig of this embodiment includes a guide plate 8, a pin board 88, a contact pin 3 for contacting the wiring circuit 71, and the contact pin 3. The probe 1 has a built-in stylus 2 for making contact with the probe 1. Further, the contact pin 3 is mounted on the guide plate 8 so as to be movable back and forth, and the stylus 2 is built in the socket 11 of the probe 1 so as to be elastically movable forward and backward.

The wiring circuits 71 are arranged in high density on the printed wiring board 7. The guide plate 8 and the pin board 88 are detachably and integrally coupled by a knock pin 891 as in the conventional case. As shown in FIGS. 1 to 3, 7, and 8, the guide plate 8 has a large number of guide holes 8 for mounting the contact pins 3 so that the contact pins 3 can move forward and backward.
5 and an opening groove 86. In addition, the pin board 88,
As shown in FIGS. 2 and 3, there is a through hole 882 for inserting and fixing the socket 11 of the probe 1.

As shown in FIGS. 2, 3 and 6, the contact pin 3 has a tip 31 for contacting the wiring circuit 71 and a head for contacting the stylus 2. It has a part 32. In addition, the head 32 has a curved concave portion 321.
(FIG. 6). As shown in FIGS. 2 to 5, the probe 1 is composed of a socket 11 and a stylus 2 which is inserted into the socket 11 so as to be movable back and forth. As shown in FIG. 4, the socket 11 is a hollow pipe and has a flange 11 on the insertion side of the stylus 2.
Has 0. The upper end 12 of the probe 1 faces the terminal pins 42 mounted on the terminal board 4 on a one-to-one basis (FIG. 1).

On the other hand, the stylus 2 is mounted in the tube 25 so as to be movable back and forth, as shown in FIGS. That is, as shown in FIG. 5, the stylus 2 has a guide column 22 having substantially the same diameter as that of the stylus 2, and a thin connecting portion 21 between the two. Then, the spring 25 is first put in the tube 25, and then the stylus 2 is inserted. Then, the tube 25 is caulked at the outer side of the connecting portion 21 of the stylus to form the caulked portion 251. .

As a result, the stylus 2 is elastically mounted in the tube 25 by the spring spring 23 so as to be movable back and forth. The reference numeral 252 indicates the tube 25.
Is a caulking portion provided at the upper end of the spring for contacting the upper end of the spring spring 23. Then, the stylus 2 thus configured is inserted into the hollow portion 111 of the socket 11 as shown in FIG. At this time, the upper end of the tube 25 holding the stylus 2 has the caulked portion 113 of the socket 11.
Abut. Further, the probe 1 configured as described above
1 to 3, is inserted into the through hole 882 of the pin board 88 and is detachably fixed. Others,
This is similar to the conventional example.

Next, the function and effect of the detector will be described.
That is, when inspecting the quality of the wiring circuit 71 on the printed wiring board 7 by electrical conduction, as shown in FIGS. 1 to 3, the guide plate 8 and the pin board 88 are approached to each wiring circuit 71 from above and below. Then, the guide plate 8 faces the printed wiring board 7.

At this time, before the contact between the two, the contact pin 3 is in a state of protruding from the guide plate 8 as shown in FIG. Also, the head 3 of the contact pin 3
The tip 21 of the stylus 2 of the probe 1 is in contact with 2. Then, the guide plate 8 contacts the printed wiring board 7,
When the tip 31 of the contact pin 3 comes into contact with the wiring circuit 71, the contact pin 3 slides up in the guide hole 85. Then, as shown in FIG. 3, the tip 31 of the contact pin is located at substantially the same position as the lower surface of the guide plate 8.

Therefore, the head 32 of the contact pin 3 is
The stylus 2 is pressed toward the probe 1. Therefore, the stylus 2 enters the tube 25 against the biasing force of the spring spring 23 (FIG. 5). Thus, after the tip 31 of the contact pin 3 comes into contact with the wiring circuit 71, the probe 1, the stylus 2, and the stylus 2, via the lead wire 15.
A current is passed through the contact pin 3 to judge the quality of the wiring circuit 71 as in the conventional case (FIG. 1).

After the inspection, the guide plate 8 and the like are moved away from the printed wiring board 7. Therefore, the contact pin 3 projects as shown in FIG. 2 by the biasing force of the spring spring 23 of the stylus 2. As described above, in the inspection jig of this example, the contact pin 3 is mounted on the guide plate 8 so as to be movable back and forth, and the probe 1 is fixed to the pin board 88 and the stylus 2 is movable so as to move back and forth inside the probe 1. I am wearing it.

Therefore, the forward / backward movement of the contact pin 3 and the forward / backward movement of the stylus are independent of each other. Therefore, as in the prior art, the three axes of the probe 1 fixed to the pin board 88, the stylus 2 inserted therein, and the guide hole 85 of the guide plate through which the stylus advances and retracts are matched with high accuracy. You don't have to let me. That is, in this example, even if the axial center of the contact pin 3 and the axial center of the stylus 2 are misaligned, there is no problem as long as they are in contact with each other (FIGS. 2 and 3).

Therefore, the guide hole 85 may be formed so as to coincide with the wiring circuit of the printed wiring board. Therefore, high precision is not required for the drilling accuracy with respect to the shaft center of the guide hole 85 and the hole of the pin board 88, and the drilling is easy. Further, since the guide hole 85 only needs to be able to smoothly slide the contact pin 3, it can be provided with a small diameter and is free from rattling.

Further, since the probe 1 does not directly contact the stylus 2 with the wiring circuit 71, it is not damaged as in the conventional case. Further, the contact pin 3 directly abuts on the wiring circuit 71 and slides in the guide hole 85. However, like the stylus of a conventional probe, the contact pin 3 must be linearly advanced and retracted both in the guide hole 85 and in the probe socket. There is no. Therefore, there is no damage due to misalignment of the shaft center between the two.

Further, since the contact pin 3 and the probe 1 are separately configured so as not to cause unreasonable movement of both of them at the time of inspection, both of them can be reduced in diameter. In this example, the diameter of the contact pin 3 is 0.27 mm, and the outer diameter of the socket of the probe 1 is 0.45 mm.
mm, inner diameter is 0.27 mm, outer diameter of stylus 2 is 0.15 m
m. In addition, in the contact pin 3 of this example,
Since the curved portion 321 is provided on the head 32, the head 3
The tip 20 of the stylus 2 can be reliably brought into contact with the needle 2.

Next, the relay section of the present embodiment (from the upper end of the probe to the lead wire, relay connector 5, lead wire 16,
The portion from the connector board 19 to the inspection device) will be described with reference to FIGS. 1, 9 and 10.

As shown in FIG. 1, the relay section of this embodiment is provided between the connector board 19 connected to the inspector 18 and the probe 1, the terminal board 4, the lead wire 15, the relay connector 5, and the leads. With line 16. The lead wire 15 has a terminal pin 42 attached to the terminal board 4 at one end and a conductor exposed portion 1 at the other end as shown in FIG.
Forming 50. The exposed conductor portion 150 is formed by removing the insulating coating of the lead wire 15. One end of the lead wire 16 is the connector board 1
9 is connected to the other end of the lead wire 1
It has a relay connector 5 to which 5 can be attached and detached.

As shown in FIG. 1, the terminal board 4 has pin holes 41 that are in a one-to-one opposed relationship with the probe terminals 12. The pin hole 41 has a hole 412 at the top for drawing out the lead wire 15. Also, terminal pin 4
When 2 is accommodated in it, the terminal pin 42 has a depth depth such that it partially protrudes from the lower end 411 of the pin hole.

On the other hand, as shown in FIG. 9, one end of the lead wire 16 is connected to a terminal 191 of a connector board 19 connected to the inspector 18. The relay connector 5 is attached to the other end of the lead wire 16. Relay connector 5
As shown in FIG. 10, the insulating coating 55, the main body 50,
It is composed of a rigid ring 53 fitted in the main body 50. The wire end 161 of the lead wire 16 is connected to the cylindrical terminal 51 of the main body 50 of the relay connector 5.

On the other side of the main body 50 of the relay connector 5, there is formed an opening 52 into which the lead wire 15 is inserted and which is branched into two upper and lower parts. In the main body 50, a constricted portion 54 for sandwiching the conductor exposed portion 150 is formed between the rigid ring 53 and the terminal 51. A spring steel material having elasticity is used for the main body 50, and a rubber material is used for the insulating coating 55.

The main body 50 has a structure in which when the opening 52 is pressed and narrowed, the constricted portion 54 expands with the rigid ring 53 as a fulcrum (B in FIG. 10). In addition, if the opening 52 is returned to its original position, the restoring force of the spring steel material causes
As shown in (C), the constricted portion 54 is restored. Also,
The gap g of the constricted portion 54 is always smaller than the diameter D of the conductor exposed portion 150 of the lead wire 15, but when the opening 52 is narrowed to enlarge the constricted portion, the conductor exposed portion 15 is narrowed.
The diameter is larger than the diameter D of 0.

As shown in FIG. 9, the insulating coating 55 of the relay connector 5 is provided with a band-shaped color ring 551 as the identification display. The color ring 551 is
The color and the number of rings are changed according to the position of the terminal 191 of the connector board 19 to which the lead wire 16 to which the relay connector 5 is attached is connected. In this example, as shown in FIG. 9, one color ring is attached to all the terminals 1911 on the uppermost stage of the connector board 19. The terminal position on the connector board 19 can be identified by the number of colorings and the color.

Next, the function and effect of the relay section of this example will be described. In this example, the lead wire 15 can be easily attached to and detached from the relay connector 5 of the lead wire 16. That is, at the time of this attachment / detachment, as shown in FIG. 10B, the opening 52 of the relay connector 5 is pressed. This gives 53
The constricted portion 54 of the relay connector 5 expands around
The lead wire 15 can be inserted (FIG. 10B).

Then, the conductor exposed portion 150 of the lead wire 15 is inserted to the inner side of the constricted portion 54 inside the main body 50 through the opening 52. Then, the pressing of the opening 52 is released. As a result, the opening 52 is restored to its original shape, the constriction of the constricted portion 54 is restored again, and the lead wire 15 is clamped (FIG. 10C). When the lead wire 15 is removed from the relay connector 5, the reverse operation (operation from C to B in FIG. 10) is performed.

Further, the insulating coating 55 of the relay connector 5 is provided with the color ring 551 as described above so that the connection correspondence between the lead wire 16 and the lead wire 15 can be easily identified. Therefore, the work of connecting the lead wire 15 can be made more efficient, and erroneous connection can be prevented. Further, the probe 1 and the lead wire 15 are electrically connected by contacting the terminal board 4 to the pin board 88 by pressing the terminal board 4 to the terminal board 42 (see FIG. 1).

As described above, according to this example, the inspection device 18
It is extremely easy to connect and disconnect the sensor and the detector. Therefore, it is extremely easy to replace the detection unit when the printed wiring board 7 to be inspected is changed. Further, in this example, as shown in FIG. 1, the lead wire 15 is not soldered to the probe terminal 12. Therefore, it is easy to remove the probe 1 from the pin board 88. Further, the contact pin 3 can be easily removed from the guide plate 8 by removing the pin boat 88. Therefore, it is easy to remove the probe 1 and the contact pin 3 from the pin-board 88 and the guide plate 8 and reuse them in the detection portion for another printed wiring board.

As described above, according to this embodiment, even for a high-density wiring circuit, it is possible to cope with the thinning of the probe stylus and the prevention of damage, the guide hole can be easily drilled, and the inspection Provided is a jig for inspecting a printed wiring board, in which the probe and the contact pin can be reused easily and electrically connected to and detached from the device.

Example 2 In this example, the method of identifying the insulating coating 55 of the relay connector 5 in Example 1 is changed. Example 1
In this case, as shown in FIG. 9, a colored strip-shaped coloring ring 551 is used. However, in this example, as shown in FIG. 552 is provided. Thereby, the lead wire 16 is connected. Terminal 19 of connector board 19
The position of 1 can be easily identified. Others are the same as in the first embodiment.

The identification display method may be a striped pattern 553 extending in the axial direction, as shown in FIG. In addition, if a symbol or mark is used together, the discriminating power is further improved.

[Brief description of drawings]

FIG. 1 is an overall explanatory view of an inspection jig according to a first embodiment.

FIG. 2 is a cross-sectional view around contact pins and a printed wiring board in a state before inspection according to the first embodiment.

FIG. 3 is a cross-sectional view around contact pins and a printed wiring board at the time of inspection in the first embodiment.

FIG. 4 is a developed front view of a socket and a stylus in the probe of the first embodiment.

FIG. 5 is a cross-sectional view of the tip portion of the probe in the first embodiment.

FIG. 6 is a front view of the contact pin according to the first embodiment.

FIG. 7 is a plan view of the guide plate according to the first embodiment.

8 is a sectional view taken along the line AA of FIG.

FIG. 9 is an explanatory diagram showing a connection relationship around a lead wire and a relay connector in the first embodiment.

FIG. 10 is a cross-sectional explanatory view showing the relay connector and its action in the first embodiment.

FIG. 11 is a perspective view of a relay connector according to the second embodiment.

FIG. 12 is a perspective view of another relay connector according to the second embodiment.

FIG. 13 is an overall explanatory view of an inspection jig in a conventional example.

FIG. 14 is an explanatory diagram around the probe of the inspection jig in the conventional example.

[Explanation of symbols]

 1. ． ． Probe, 11. ． ． Socket, 15. ． ． Lead wire, 150. ． ． Exposed conductor part, 16. ． ． Lead wire, 18. ． ． Inspector, 19. ． ． Connector board, 2. ． ． Stylus, 25. ． ． Tube, 3. ． ． Contact pin, 31. ． ． Tip, 4. ． ． Terminal board, 41. ． ． Pin hole, 42. ． ． Terminal pin, 5. ． ． Relay connector, 7. ． ． Printed wiring board, 71. ． ． High-density pitch wiring circuit, 8. ． ． Guide plate, 85. ． ． Guide hole, 88. ． ． Pin board,

Claims (2)

[Claims] 1. An inspection jig for inspecting a wiring circuit on a printed wiring board according to the presence or absence of electrical continuity, the inspection jig including a guide plate, a pin board, and a contact for contacting the wiring circuit. The probe includes a pin and a probe having a stylus for contacting the contact pin, and the contact pin is mounted on the guide plate so as to be movable back and forth, and the stylus is elastically mounted on the probe so as to be movable forward and backward. Between the connector board connected to the inspector and the probe, there is a terminal board, a lead wire and a lead wire, and the terminal board has a pin hole facing the probe terminal. Has a terminal pin attached to the pin hole of the terminal board at one end and an exposed conductor portion at the other end, and the lead wire has one end connected to the connector board. A jig for inspecting a printed wiring board, which has a relay connector to which a lead wire can be attached and detached at the other end. 2. The jig for inspecting a printed wiring board according to claim 1, wherein the relay connector has an indication for identifying the position of the connector terminal on the connector board.