JP2002277501A - Continuity inspection jig and manufacturing method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a continuity inspection jig easy to manufacture and capable of inspecting the continuity of fine patterns, and a manufacturing method therefor. SOLUTION: This continuity inspection jig 1 comprises an insulating body 7 having a guide hole 70 therein, a contact pin 6 provided in a vertically movable manner in the guide hole 7 with its pinpoint directed toward a wiring circuit 81, a conductive compression coil spring 5 for biasing the contact pin toward the wiring circuit side, and a wire 3 electrically connected to the contact pin via the coil spring. The coil spring and the wire are in contact with each other. A contact part 31 of the wire in contact with the coil spring comprises a bent part 310 made by bending an end of the wire. If solder is deposited on the contact part 31, it is permissible.

Description

DETAILED DESCRIPTION OF THE INVENTION 【Technical field】

[0001] The present invention relates to a continuity inspection jig for inspecting electrical continuity of a printed wiring board and a method of manufacturing the same.

[0002]

2. Description of the Related Art A continuity inspection jig is an apparatus for inspecting continuity by bringing a contact pin into contact with a wiring circuit of a printed wiring board. Conventionally, as such a continuity inspection jig, FIG.
(A), as shown in FIG. 7, an insulator 97 made of ceramic or resin, a contact pin 96, and an insulator 97
Guide hole 97 for inserting contact pin 96
0, and a compression coil spring 95 that urges the contact pin 96 in the guide hole 970 toward the wiring circuit 981. The compression coil spring 95 is inserted into the guide hole 970.
It is supported by a socket 94. As shown in FIG. 6B, the socket 94 is a coil spring or a pipe, and is soldered to the wire 93. The surface of the wire 93 is covered with an insulating protective film 939.

[0003] Contact pin 96, compression coil spring 9
5, the socket 94 and the wire 93 are in a conductive state. As shown in FIG.
When the wiring circuit 981 of the printed wiring board 98 is brought into contact,
As shown in FIG. 8, through these, the conduction state of the wiring circuit 981 is inspected by the electric conduction measuring device 97 provided at the end of the wire 93.

[0004]

However, in the above-described conventional continuity inspection jig, as shown in FIG. 6B, since the wire 93 and the socket 94 are separate bodies, an operation for assembling them is required. You. This complicates the manufacturing process of the continuity inspection jig. Also, in order to cope with the recent trend toward fine patterns, the pitch of wiring circuits has been reduced. Therefore, it is necessary to narrow the pitch of the contact pins. However, in a conventional structure in which a socket is assembled to a wire, each component needs to be miniaturized, which makes processing difficult and increases the manufacturing cost.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an object thereof is to provide a continuity inspection jig which can be easily manufactured and can perform continuity inspection of a fine pattern, and a method of manufacturing the same.

[0006]

According to a first aspect of the present invention, there is provided a continuity inspection jig for inspecting electrical continuity of a printed wiring board, wherein the continuity inspection jig comprises an insulator having a guide hole, and a pin inserted in the guide hole. A contact pin having a tip movable up and down toward the wiring circuit, a conductive elastic member for urging the contact pin toward the wiring circuit, and electrically connected to the contact pin through the elastic member; The elastic member and the wire are in contact with each other, and a contact portion of the wire that contacts the elastic member is a bent portion formed by bending a tip of the wire. It is a continuity inspection jig.

In the continuity inspection jig of the present invention, the contact portion of the wire with the elastic member is a bent portion formed by bending the tip of the wire. The bent portion has a shape larger than the diameter of the wire and suitable for supporting the elastic member. Therefore, the elastic member can be stably supported. Further, the contact portion is formed by bending and is integral with the wire. Therefore, the conventionally required assembling work becomes unnecessary, and the manufacturing cost can be reduced. Further, the strength of the wire and the contact portion is high, and the electrical connection reliability is excellent.

Further, since the contact portion of the wire is formed by bending the wire, it can be made smaller than a conventional socket. Therefore, the diameter of the guide hole for guiding the wire can be reduced, and the pitch of the guide hole can be reduced. Therefore, the continuity test of a fine pattern having a narrow wiring pitch can be performed.

The bending process applied to the tip of the wire is as follows:
For example, it is preferable to forcibly push the tip of the wire into the forming hole of the jig, bend the tip of the wire with the wall surface of the forming hole, and form the same shape as the forming hole. Thereby, bending can be easily performed.

As the insulator, resin, ceramic, or the like can be used. A contact portion formed of a bent portion is formed at one end of the wire, and the wire is electrically connected to the contact pin through the contact portion and the elastic member. The other end of the wire is connected to a power supply or an electrical continuity meter.

When inspecting the electrical continuity of the wiring circuit of the printed wiring board, a plurality of contact pins are arranged at measurement points of the wiring circuit. Next, the continuity inspection jig is brought closer to the wiring circuit side, and the tip of the contact pin is brought into contact with the wiring circuit. Since the contact pin is urged toward the wiring circuit by the elastic member, the tip of the pin contacts with an appropriate pressing force according to the height of the wiring circuit. Next, electricity is supplied to the wiring circuit through the contact pins to check whether or not normal electrical continuity is exhibited.

As in the second aspect of the present invention, it is preferable that solder is attached to the surface of the bent portion of the wire. Thereby, the electrical connection is secure and stable.

The shape of the bent portion is preferably a shape that can stably hold the elastic member. For example, the bent portion has a columnar or disk shape having the same central axis as the central axis of the guide hole. Further, the bent portion may be flat or may be provided with irregularities.

According to a third aspect of the present invention, there is provided a continuity inspection jig for inspecting electrical continuity of a printed wiring board, wherein the continuity inspection jig includes an insulator having a guide hole, and a pin tip inserted into the guide hole. A contact pin provided to be movable up and down toward the circuit side, a conductive elastic member for urging the contact pin toward the wiring circuit side, and a wire electrically connected to the contact pin through the elastic member. The elastic member and the wire are in contact with each other, and a contact portion of the wire that contacts the elastic member is a solder attachment portion formed by applying a solder to a tip of the wire. This is a continuity inspection jig.

In the present invention, the contact portion of the wire with the elastic member is formed of a solder attachment portion in which solder is attached to the tip of the wire instead of the bent portion. The solder attachment portion is larger than the diameter of the wire and has a shape suitable for supporting the elastic member. Therefore, the solder attachment portion can stably support the elastic member. Also, since the bonding strength between the wire and the solder is high, the electrical connection reliability of the contact portion is also high. Further, the contact portion can be easily formed, and the work of assembling the wire and the socket, which is conventionally required, is not required, so that the manufacturing cost can be reduced.

Further, since the contact portion is formed of a solder-attached portion in which solder is attached to the tip of the wire, the size of the contact can be reduced as compared with a conventional socket. Therefore, the inner diameter of the guide hole for guiding the wire can be reduced, and the pitch can be reduced. Therefore, according to the continuity inspection jig of the present invention, continuity inspection of a fine pattern having a narrow wiring pitch can be performed.

It is preferable that the shape of the solder attachment portion is a shape that can stably hold the elastic member. For example, the solder attachment portion is a columnar body or a disk having the same central axis as the central axis of the guide hole. Further, the contact portion of the solder attachment portion with the wire may be flat or may be provided with irregularities.

In forming the solder-attached portion of the wire, for example, a method of forming a jig by melting a solder ball, placing the tip of the wire therein, and solidifying the solder; There is a method in which molten solder is put in the inside, the tip of a wire is put in it, and the solder is solidified.

Preferably, the contact portion of the wire and the elastic member are fitted to each other. Thus, the contact portion and the elastic member can be reliably electrically connected. In order to fit the contact portion and the elastic member together, for example, one of the contact portion and the elastic member is formed as a concave portion, and the other is formed as a convex portion having a size that fits in the concave portion. A compression coil spring or the like can be used as the elastic member.

According to a fifth aspect of the present invention, the printed circuit board is inspected for electrical continuity, and an insulator having a guide hole is provided.
A contact pin provided in the guide hole so that the tip of the pin can move up and down toward the wiring circuit, a conductive elastic member for urging the contact pin toward the wiring circuit, and a contact pin through the elastic member. In a method of manufacturing a continuity inspection jig composed of electrically connected wires,
Pressing the tip of the wire into the forming hole of the jig to form a bent portion, filling the gap between the bent portions in the formed hole with solder, and connecting the bent portion to the formed hole. And a step of contacting one end of the elastic member with the bent portion and the other end of the elastic member with a contact pin in a guide hole provided in the insulator. Is a method of manufacturing a continuity inspection jig.

In the manufacturing method of the present invention, the wire is bent in the forming hole of the jig and then filled with solder to form a contact portion having a shape similar to the shape of the forming hole. The contact portion thus formed is larger in diameter than the wire, and has a shape suitable for supporting the elastic member. Therefore, the elastic member can be stably supported.

Further, in the contact portion, since the wire and the solder are excellent in bonding strength, the electrical connection reliability is excellent. Furthermore, it is easy to form the contact portion, and the assembling work conventionally required becomes unnecessary, and the manufacturing cost can be reduced. In addition, since the contact portion is formed by bending the wire and attaching solder thereto, the contact portion can be made smaller than a conventional socket. Therefore, the inner diameter of the guide hole for guiding the wire can be reduced,
The pitch can be reduced. Therefore, according to the continuity inspection jig of the present invention, continuity inspection of a fine pattern having a narrow wiring pitch can be performed.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 A continuity inspection jig according to an embodiment of the present invention is shown in FIGS.
This will be described with reference to FIG. The continuity inspection jig 1 of this example is shown in FIG.
As shown in (a), an insulator 7 having a guide hole 70 is provided.
A contact pin 6 provided in the guide hole 70 so that the tip of the pin can move up and down toward the wiring circuit 81, and a conductive compression coil spring 5 for urging the contact pin 6 toward the wiring circuit 81; , And the wire 3 electrically connected to the contact pin 6 through the compression coil spring 5.

As shown in FIG. 1B, the contact portion 31 of the wire 3 with the compression coil spring 5 is formed by a bent portion 310 formed by bending the tip of the wire 3. Solder 311 is attached to the surface of the bent portion 310.

The contact portion 31 of the wire 3 has a diameter of 0.15
mm, 0.15mm thick disk, wire 3
Larger than the diameter (0.1 mm) of the
Smaller than the diameter of. As shown in FIGS. 1B and 2A, the contact portion 31 of the wire 3 has a concave portion 312 at a portion facing the compression coil spring 5.

At one end of the compression coil spring 5 on the wire 3 side, a substantially disk-shaped facing contact portion 51 is provided.
The opposing contact portion 51 is provided with a convex portion 512 that fits into the concave portion 312 of the contact portion 31. The concave portion 312 of the wire 3 and the convex portion 512 of the compression coil spring 5 are fitted with each other. Opposing contact portion 51 in compression coil spring 5
A contact portion 53 that contacts the contact pin 6 is provided at an end opposite to the contact pin 6.

An electrical continuity measuring device (see FIG. 7) is connected to the opposite side of the wire 3 from the contact portion 31.
The wire 3 is made of a metal material, and is covered with an insulating protective film 39 such as a resin.

As shown in FIG. 1A, the insulator 7 is formed by bonding three first, second and third resin plates 71, 72 and 73 in order from the wiring circuit side 81. First, second,
First, second, and third guide holes 710.720, 730 are formed in the third resin plates 71, 72, 73, respectively. The first to third guide holes 710, 720, and 730 have the same central axis, and these constitute the guide hole 70. first,
The inner diameter of the second and third guide holes 710, 720, 730 is
They are 0.15 mm, 0.20 mm and 0.15 mm in this order.

First, second, and third guide holes 710, 72
The contact pin 6, the compression coil spring 5, and the wire 3 are inserted in order into 0,730. When the compression coil spring 5 reaches the maximum extension, the head 62 of the contact pin 6 is locked by a step 721 formed between the first guide hole 710 and the second guide hole 720. The contact portion 31 of the wire 3 is locked by a step 723 formed between the third guide hole 730 and the second guide hole 720. The compression coil spring 5 urges the contact pin 6 toward the wiring circuit 81 and urges the wire 3 toward the side opposite to the wiring circuit 81.

The diameter of the leg 61 and the head 62 of the contact pin 6 is 0.1 mm and 0.15 mm. The diameter of the compression coil spring 5 is 0.1 mm. The diameters of the wire 3 and the contact portion 31 are 0.05 mm and 0.2 mm.

Next, a method of manufacturing the continuity inspection jig 1 of this embodiment will be described. First, as shown in FIG. 1A, first, second, and third guide holes 710, 720, and 730 are formed in three first, second, and third resin plates 71, 72, and 73, respectively.
The wire 3 covered with the insulating protection film 39 is prepared. As shown in FIG. 3A, the tip of the wire 3 is exposed from the insulating protective film 39.

Next, as shown in FIG. 3B, a jig 2 provided with a forming hole 20 having the same shape as the contact portion to be formed is prepared. The tip of the wire 3 is pushed into the forming hole 20 of the jig 2 to form a bent portion 310.
Next, as shown in FIG. 3C, the molten solder 311 is filled into the forming hole 20 into which the bent portion 310 is pressed.

As shown in FIG. 4A, after the bending, the bent portion 310 is once released from the mold, and the molten solder 3 is removed.
After coating the cover 11, as shown in FIG. 4 (b), the cover 11 can be again put into the forming hole 20 and formed. Next, the bent portion 310 is released from the molding hole 20. Thus, as shown in FIG. 1B, the contact portion 31 including the bent portion 310 is formed at the tip of the wire 3.

Also, a disk-shaped metal material having a diameter of 0.4 mm and a thickness of 2 mm is soldered to one end of the compression coil spring 5 to form the facing contact portion 51.

Next, as shown in FIG. 1A, the wire 3 is inserted into the third guide hole 730, and the contact portion 31 is locked to the step portion 723. In addition, the contact pin 6 is inserted into the first guide hole 710, and the head 62 is locked to the step 721. Further, the compression coil spring 5 is connected to the second guide hole 720.
Insert inside.

Next, a first resin plate 71, a second resin plate 72,
The third resin plates 73 are sequentially laminated and bonded. At this time, the contact portion 31 of the wire 3 in the third guide hole 730 and the opposing contact portion 51 of the compression coil spring 5 in the second guide hole 720
Are fitted to each other, and the contact portion 53 of the compression coil spring 5 in the second guide hole 720 and the first guide hole 71
The first to third resin plates 71 to 73 are arranged so that the heads 62 of the contact pins 6 in abutment 0 are in contact with each other. Thus, the continuity inspection jig 1 of the present example is obtained.

Next, a method for conducting a continuity test on a printed wiring board using the continuity test jig 1 of this embodiment will be described. As shown in FIG. 1A, the wiring circuit 8 of the printed wiring board 8
The contact pin 6 is arranged on the measurement point of (1). Next, the contact pins 6 are brought close to the wiring circuit 81, and the tips of the contact pins 6 are brought into contact with the wiring circuit 81. Since the contact pin 6 is urged toward the wiring circuit 81 by the compression coil spring 5, the pin tip comes into contact with an appropriate pressing force according to the height of the wiring circuit 81 (see FIG. 7).

Next, electricity is supplied to the wiring circuit 81 through the contact pins 6. If no abnormality such as disconnection or short circuit occurs in the wiring circuit 81, normal electrical continuity is detected by the electrical continuity measuring device. If an abnormality has occurred, no current flows or an abnormal current value is detected.

In the continuity inspection jig 1 of this embodiment, the contact portion 31 of the wire 3 with the compression coil spring 5 is formed by bending the tip of the wire 3. The bent portion 310 is wide and has a shape suitable for supporting the compression coil spring 5. Therefore, the bending section 310
Can stably support the compression coil spring 5.

The contact portion 31 of the wire 3 is
Since it is formed by bending, it is integrated with the wire 3. Therefore, no assembling work is required, and the manufacturing cost can be reduced. Further, the strength between the wire and the contact portion and the reliability of the electrical connection are excellent. Since the contact portion 31 of the wire 3 and the opposing contact portion 51 of the compression coil spring 5 are fitted to each other, the wire 3
And the compression coil spring 5 can be connected stably.

Embodiment 2 In this embodiment, as shown in FIG.
, And the opposing contact portion 51 of the compression coil spring 5 are in contact with each other at the flat portions 313 and 513. Others are the same as the first embodiment. Also in this example, the same effect as in the first embodiment can be obtained.

Embodiment 3 In this embodiment, as shown in FIG.
And the opposing contact portion 51 of the compression coil spring 5 are fitted to each other. The contact portion 31 of the wire 3 is a convex portion 314, and the facing contact portion 51 of the compression coil spring 5
Has a concave portion 514 into which the convex portion 314 fits.

As shown in FIG. 5, the opposed contact portion 51 of the compression coil spring 5 is formed by joining a ring 519 (FIG. 5A) and a disk 518 (FIG. 5B). A recess 514 is formed by the inner wall of the ring 519 and the surface of the disk 518 therein. Others are the same as the first embodiment. In this example, too, Embodiment 1
The same effect as described above can be obtained.

[0044]

According to the present invention, it is possible to provide a continuity inspection jig which can be easily manufactured and can perform a continuity inspection of a fine pattern, and a method of manufacturing the same.

[Brief description of the drawings]

FIG. 1A is an explanatory view of a continuity inspection jig according to a first embodiment, and FIG. 1B is a cross-sectional view of a contact portion of a wire.

FIGS. 2A and 2B are explanatory diagrams showing a contact state between a contact portion of a wire and a compression coil spring in Embodiments 1 to 3,
(B), (c).

FIGS. 3A, 3B, and 3C are diagrams illustrating a method of forming a contact portion of a wire according to the first embodiment. FIGS.

FIGS. 4A and 4B are diagrams illustrating a method of forming a contact portion of another wire according to the first embodiment.

5 (a), 5 (b), and 5 (c) are diagrams illustrating a method of forming a facing contact portion of a compression coil spring according to a third embodiment.

6A and 6B are explanatory views of a continuity inspection jig in a conventional example,
And a front view (b) of a wire and a socket.

FIG. 7 is an explanatory view of an inspection method of a continuity inspection jig in a conventional example.

FIG. 8 is an enlarged explanatory view of a continuity inspection jig in a conventional example.

[Explanation of symbols]

 1. . . 1. a continuity inspection jig; . . Jig, 20. . . 2. forming holes, . . Wire, 31. . . Contact, 310. . . Bending part, 311. . . Solder, 312, 514. . . Recesses, 313, 513. . . Plane part, 314, 512. . . Convex part, 39. . . 4. Insulating protective film, . . Compression coil spring, 51. . . 5. counter contact, . . 6. contact pin; . . Insulator, 70. . . Guide hole, 8. . . Printed wiring board, 81. . . Wiring circuit,

Claims (5)

[Claims] 1. A continuity inspection jig for inspecting electrical continuity of a printed wiring board, wherein the continuity inspection jig includes an insulator having a guide hole, and a pin tip in the guide hole facing a wiring circuit. A contact pin provided to be vertically movable, a conductive elastic member for urging the contact pin toward the wiring circuit side, and a wire electrically connected to the contact pin through the elastic member; And a contact portion that contacts the wire and the elastic member of the wire comprises a bent portion formed by bending a tip of the wire. 2. The continuity inspection jig according to claim 1, wherein solder is attached to the surface of the bent portion of the wire. 3. A continuity inspection jig for inspecting electrical continuity of a printed wiring board, wherein the continuity inspection jig includes an insulator having a guide hole, and a pin tip in the guide hole facing a wiring circuit. A contact pin provided to be vertically movable, a conductive elastic member for urging the contact pin toward the wiring circuit side, and a wire electrically connected to the contact pin through the elastic member; And the wire is in contact with each other, and a contact portion of the wire that contacts the elastic member comprises a solder attachment portion formed by applying solder to a tip of the wire. 4. The method according to claim 1, wherein:
A continuity inspection pick-up tool, wherein the contact portion of the wire and the elastic member are fitted with each other. 5. An insulator having a guide hole for inspecting electrical continuity of a printed wiring board, a contact pin provided in said guide hole so as to be movable up and down with a pin tip toward a wiring circuit side, and said contact In a method for manufacturing a continuity inspection jig comprising a conductive elastic member for urging a pin toward a wiring circuit and a wire electrically connected to a contact pin through the elastic member, the tip of the wire is cured. Forming a bent portion by pressing into a forming hole of a tool, filling a gap between the bent portions in the forming hole with solder, and releasing the bent portion from the forming hole. Contacting one end of an elastic member with the bent portion and contacting the other end of the elastic member with a contact pin in a guide hole provided in the insulator. Method of manufacturing a continuity inspection jig.