JP3244177B2 - Clips used for jigs for printed circuit boards - Google Patents

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 circuit board for holding a printed circuit board in a bath of a plating solution when performing a plating process such as gold or copper plating on a printed circuit board in an electronic device. Regarding the clip to be used.

[0002]

2. Description of the Related Art Conventionally, when manufacturing a printed circuit board, holes are punched by a press after etching the printed circuit board, and the holes are formed by plating such as gold or copper plating and wiring. In the plating process at this time, the printed board is suspended by a plating jig in a bath of a plating solution in which the plating solution circulates and immersed at a predetermined temperature for a predetermined time. Various types of plating jigs for suspending the printed circuit board have been conventionally proposed, and one of the jigs shown in FIG. 9 has been proposed as one of the jigs.

This jig is fitted to left and right vertical bars 42, 43 having upper ends secured with locking portions 40, 41 suspended from a transporting cathode bar 39 disposed above a plating bath, on surfaces opposed to each other. Forming grooves 44 and 45 are formed, and the upper horizontal bar 46 connecting the locking members 40 and 41 and the lower horizontal bar 47 connecting the lower portions of the vertical bars 42 and 43 form a frame body. 4
The printed circuit boards 48 cut into a predetermined shape are connected to each other by conductive brackets 50 and 45 and fitted together. A conductive connector 51 is disposed between the locking members 40 and 41. The upper end of the printed circuit board 4 is brought into conductive contact with the transport cathode bar 39, and the lower end of the printed circuit board 4 is
8 is sandwiched.

[0004] Although the plating jig as described above is excellent in terms of uniformity of conductivity, its structure is complicated and has to be expensive. Therefore, without using such a complicated plating jig, the left and right vertical bars 42,
A vertical bar 53 as shown in FIGS.
Have been proposed. That is, in the vertical bar 53, a V-shaped opening 54 for fitting a printed circuit board is formed on the front surface, a vertical wall portion 55 is provided on the rear side, and a screw hole for fixing a locking member is provided on the upper portion. 56 are formed, and this vertical bar 42 is formed.
Similarly to the above-mentioned conventional one, the printed board is hung on the transporting cathode bar, sandwiches the printed board between the openings 54 of the vertical bars facing each other, and supports the printed board.

[0005] In this plating jig, a metal plate can be manufactured by sheet metal processing, and can be less expensive than that shown in FIG. However, in this plating jig, the printed circuit board is supported only by sandwiching the printed circuit board between the opposing openings of the two vertical rods. There is a play part. Therefore, when the printed circuit board is suspended from the plating bath by using the plating jig, the printed circuit board rattles in the opening of the vertical rod due to the flow resistance of the plating solution circulating in the plating bath, and the plating is performed. Not only cannot be performed uniformly, but also may fall out of the opening and fall into the plating bath.

Further, as a countermeasure, as shown in FIG. 12, a fixed plate 58 is welded to a flat bar 57 at predetermined intervals, and a stud 60 is welded to the fixed plate 58 to protrude and fix. When the printed board 48 is fixed, the side edge of the printed board 64 is brought into contact with the fixing plate 58 to perform positioning, the studs 60 are inserted into the holes 62 of the substantially U-shaped holding member 61, and are pinched by the thumb screws 63. Member 61
The printed circuit board 64 is fixed by tightening the printed circuit board 64 with the holding end 63 of the above.

[0007] Incidentally, the one shown in FIG.
Although there is no play between the vertical bar and the printed circuit board, and there is no play between the vertical bar and the printed circuit board, the printed circuit board can be securely fixed. When fixing the printed circuit board, the holding members provided at predetermined intervals with respect to the vertical bar must be fixed by screwing the thumb screws one by one by hand. The same work is required for removal, and there is a disadvantage that the work requires a lot of trouble and time.

[0008]

SUMMARY OF THE INVENTION The present invention is intended to solve such a problem, and has a simple structure, can securely fix a printed circuit board, is easy to attach and detach a printed circuit board, and is inexpensive. This is to provide a clip used for the tool.

[0009]

According to the present invention, there is provided a clip used for a jig for a printed circuit board for holding a printed circuit board in a plating tank, wherein the clip has a tip for locking the printed circuit board in a guide groove of a holding member. A clip used for a jig for a printed circuit board comprising an insertion portion, an elastic bending portion, a resilient portion for resiliently supporting a vertical wall portion of the holding member, a locking portion for locking to the holding member, and a grip portion. This is a means for solving the first problem. In addition, the tip insertion portion includes a tip portion orthogonal to the printed circuit board to be inserted and a curved portion connected to the tip portion and curved toward the pair of forked support portions of the holding member, thereby solving the second problem. Means.

Since the present invention is constructed as described above, when plating a printed circuit board, a clip is fixed to a jig body and the printed circuit board is locked between the jig body and the clip. Are held by the elastic force of the clip.

[0011]

Embodiments of the present invention will be described with reference to the drawings. As shown in FIGS. 1 to 6, left and right locking members 3, 3 provided at the upper end with locking portions 2, 2 suspended from a transporting cathode bar 1 disposed above the plating bath, are provided with locking portions. The elastic springs 4 and 4 are provided on the transfer members 2 and 2, and the locking portions 2 and 2 are locked and held by the transporting cathode rod 1. A pair of holding members 12, 12 are fixed to the lower ends of the locking members 3, 3 via bolts 8, 9, 10, 11, respectively. A guide groove 1 into which the edge of the printed board 14 is loosely fitted inside the holding members 12 and 12.
A pair of bifurcated support portions 16 and 16 (see FIG. 6) having an opening of about 30 degrees are provided in the longitudinal direction.
Vertical wall portions 17 are provided on the back side of the holding members 12. Bends 18, 18, which are bent outward and rearward in the front view, are formed in the connecting portions of the holding members 12, 12 and the locking members 3, 3.

A bent portion 18 is provided between the holding members 12 and 12.
Is provided with an upper width determining adjustment member 20. The upper width determining adjusting member 20 is composed of horizontal members slidable with respect to each other to adjust the distance between the holding members 12, 12.
01 has one end fixed to the locking member 3 with a bolt 10 and the other end provided with a screw 23. The other horizontal member 2
02 is provided with a long groove 24 that fits into the screw 23 so that the horizontal member 2
The holding members 12 and 12 can be fixed to each other by a predetermined distance between the holding members 12 and 12 by means of screws 23.

The lower width determining adjusting member 21 includes a holding member 12,
One of the horizontal members 203 is provided at the lower end of the
, And a screw 25 is provided at the other end. The other horizontal member 204 is provided with a long groove 26 that fits into the screw 25 so that the horizontal members 203 and 204 can slide with each other and be fixed at a predetermined distance between the holding members 12 and 13 by the screw 25. I have.

The jig body 30 is formed by the holding members 12 and 12, the upper width determining adjustment member 20, and the lower width determining adjusting member 21.
Is formed. The jig body 30 is made of stainless steel or the like and has conductivity. The jig body 30 is electrically connected to the transporting cathode rod 1 by the locking portions 2 and 3 at the upper end thereof, and electricity is supplied to the printed circuit board. And the printed circuit board 14 from the transport cathode bar 1 by a separate conductive member provided on the jig body 30.
Electricity flows to

As shown in FIG. 5, a clip 31 for locking the printed circuit board 14 to the holding member 12 comprises a tip insertion portion 311 for locking the printed circuit board 14 in the guide groove 15 of the holding member 12, and an elastic bending portion 312. Vertical wall portion 17 of holding member 12
And a retaining portion 314 for retaining the retaining member 12 and a retaining portion 315 for retaining the retaining member 12. Tip insertion part 3
Reference numeral 11 denotes a tip 311a orthogonal to the printed board 14 inserted into the guide groove 15 and a curved portion 311b connected to the tip 311b and curved toward the symmetrical bifurcated portion 16.
After the edge of the printed board 14 is loosely fitted into the guide groove 15 while holding the grip portion 315 by hand, the front end 311a is engaged with the guide groove 15, and the printed board 14 is held by the holding member 1.
2, the distal end portion 311 a is strongly engaged with the forked portion 16 by the elastic force of the curved portion 311 b that has been curved. The elastic bent portion 312 and the elastic portion 313 elastically support the forked portion 16 and the vertical wall portion 17 of the holding member 12 and assist in stably engaging the printed circuit board 14 with the holding member 12. Locking part 3
14 is further wound around the vertical wall portion 17 on the back side of the holding member 12 to further assist the stable engagement of the clip 31 with the holding member 12, and is also clipped from the holding member 12 together with the elastic bending portion 312. It is easily bent by the resilience when it is detached, and it is bent. The grip portion 315 is a portion that engages and disengages the printed board 14 with the holding member 12 and grips the clip 31 with a finger for attaching and detaching the clip 31 to and from the holding member 12. The clip 31 has a surface coated with a synthetic resin so that the printed circuit board can be held in a bath of a plating solution so that the plating time can be kept long. Note that the distal end insertion portion 311 is not coated with a synthetic resin in order to improve the electrical conductivity.

When using the jig for plating a printed circuit board having the above-described structure, the grip portion 315 of the clip 31 is gripped by a finger, and the leading end insertion portion 311 of the clip 31 is engaged with the guide groove 15 and the printed circuit board 14 is fixed. Is fixed to the forked support portion 16 of the holding member 12, and the elastic bending portion 312 and the elastic portion 313 are provided on the vertical wall portion 17 provided on the back side of the holding member 12.
And the locking portion 314 is wound around the vertical wall portion 17 on the back side of the holding member 12 so that the curved portion 3 having the curved R is formed.
11b strongly engages the front end 311a orthogonally to the printed circuit board 14 inserted into the fork, so that the clip 31 is stably engaged with the holding member 12, and
Thus, the printed board 14 is stably engaged with the holding member 12. Then, the printed circuit board 14 is moved to FIG.
Since the curved portion 312 is curved in the direction of the forked portion-shaped support portion even when pulled in the direction of the arrow, the printed circuit board 14 does not separate from the holding member 12 and the clip 131 due to its elastic force. Clip 31 is attached to a plurality of printed circuit boards 14
1, the clip 31 clamps the printed circuit board 14 between the pair of holding members 12, 12 by the elastic force as described above. The printed circuit board 7 thus fixed to the jig main body 30 is
The plating process is performed by placing the locking portions 2 and 3 at the upper end of the substrate on the transporting cathode rod 1 and sinking the printed circuit board 14 into the plating bath. At the end of the plating process, the locking portions 2, 2
Is removed from the transporting cathode rod 1, the printed circuit board 14 is lifted out of the bathtub, the grip portion 315 of the clip 31 is gripped by a finger, and the grip portion 315 of the clip 31 is rotated, so that the elastic bending portion 3
The clip 31 is detached from the holding member 12 together with the clip 12.

With this structure, the plurality of printed circuit boards 14 can be loosely fitted one after another by merely dropping the edge portions of the printed circuit boards 14 into the guide grooves 15 from above, and the printed circuit boards 14 are held by the elastic force of the clip. The printed circuit board 14 thus sandwiched is also fixed to the jig body by the plating solution circulating in the plating bath, but as shown in FIG. 8, one of the two is affected by the liquid flowing in the plating bath. It also curves along the support 16. As a result, the degree of plating of the printed circuit board varies, so that there is a problem that a plating layer having an even thickness cannot be obtained, and the printed circuit board is not sufficiently held by the elastic force of the clip.

Therefore, as a second embodiment, the support member on the downstream side in the flow direction of the plating solution in one of the support members constituting the pair of forked support portions is disposed substantially at right angles to the holding member. By doing so, the printed circuit board may be clamped by the elastic force of the clip and may be prevented from being bent by the influence of the plating solution circulating in the plating bath.

In the above configuration, when plating the printed circuit board, a clip is fixed to the jig body,
The printed circuit board is locked between the jig body and the clip. At that time, in particular, of the one support member constituting the pair of forked support portions, the support member on the downstream side in the flow direction of the plating solution is disposed substantially at right angles to the holding member,
The printed circuit board is held by the elastic force of the clip.

This embodiment has substantially the same configuration as that shown in FIGS. 1 to 6, except for the configuration of a pair of forked support portions 16, 16 '. Therefore, as for the configuration, operation, and the like of the members other than the bifurcated support portion, the above description of FIGS. 1 to 6 is cited, and the description thereof is omitted here.

That is, the pair of forked support portions 16, 16 '
As shown in FIG. 7C, one support portion 16 is disposed at right angles to the vertical wall portion 17 of the holding member, and the other support portion 16 ′ is It is arranged so as to have an opening of 20 to 30 degrees. 20 degree opening
The reason why the angle is set to 30 degrees is to facilitate the insertion of the pinint board 14 and to prevent the printed board from being bent (warped). Therefore, as shown in FIG. 8, the support member on the downstream side in the flow direction of the plating solution, among the one support member constituting the pair of bifurcated support portions, is disposed substantially at right angles to the holding member. Thus, the printed circuit board is held by the elastic force of the clip.

[0022]

As described above, according to the present invention, the following effects can be obtained. The clip can stably engage the printed circuit board with the holding member. Since the curved portion is curved in the direction of the forked portion-shaped support portion even when the printed circuit board is pulled, the printed circuit board does not separate from the holding member and the clip due to the elastic force. Also,
The clip can be easily detached from the holding member together with the elastic bending portion by gripping the clip gripping portion with a finger and rotating the clip gripping portion.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a use state of a jig for plating a printed board of the present invention.

2A and 2B show a locking member and a holding member of the jig for plating a printed circuit board of the present invention, wherein FIG. 2A is a front view of the locking member and the holding member, FIG. 2B is a side view thereof, and FIG. It is AA sectional drawing of (b).

3A and 3B show the upper width determining adjusting member, wherein FIG. 3A is a front view of one horizontal member of the upper width determining adjusting member, and FIG. 3B is a front view of the other horizontal member.

4A and 4B show the lower width determining adjusting member, wherein FIG. 4A is a front view of one horizontal member of the lower width determining adjusting member, and FIG. 4B is a front view of the other horizontal member.

5A and 5B show the clip, wherein FIG. 5A is a perspective view of the clip, FIG. 5B is a side view of the clip before the clip is inserted into a holding member,
(C) is a side view after the clip is inserted into the holding member.

FIG. 6 is a schematic view showing the same use state.

7A is a front view of a jig for plating a printed circuit board according to the present invention, FIG. 7B is a side view thereof, and FIG.

FIG. 8 is a top view showing a use state.

FIG. 9 is a perspective view showing another conventional printed circuit board plating apparatus.

FIG. 10 is a cross-sectional view showing another conventional locking member.

FIG. 11 is a front view of the same.

FIG. 12 is a sectional view showing still another conventional locking member.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 3 Locking member 12 Holding member 14 Printed circuit board 15 Guide groove 16 A pair of bifurcated support portions 18 Bend portion 20 Upper width determining adjusting member 21 Lower width determining adjusting member 201 Horizontal member 30 Jig body 31 Clip 311 Tip insertion portion 312 Elasticity Bending part 313 Resilient part 314 Locking part 315 Grip part 32 Clip

Claims (2)

(57) [Claims] 1. A holding member having a guide groove for loosely fitting both side edges of a printed circuit board and having a pair of bifurcated support portions disposed opposite to each other, and adjusting a distance between the pair of holding members. A clip for locking the printed circuit board of the jig main body to the holding member, the clip including a width determining adjustment member fixed freely, wherein the clip is a tip insertion portion for locking the printed circuit board in a guide groove of the holding member. A clip for use in a jig for a printed circuit board, comprising: a resilient bent portion; a resilient portion for resiliently supporting a vertical wall portion of the holding member; a locking portion for locking to the holding member; and a grip portion. . 2. The device according to claim 1, wherein the tip insertion portion includes a tip portion orthogonal to a printed circuit board to be inserted and a curved portion connected to the tip portion and curved toward the pair of forked support portions of the holding member. Clips for jigs for printed circuit boards.