JPS5823191Y2 - Printed wiring board terminal plating jig - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a terminal plating jig that is applied to the process of plating a large number of parallel terminals that are inserted into a connector on a printed wiring board or the like.

In order to provide stability of electrical connection or corrosion resistance of the surface of the terminal, the contact area is usually plated with a noble metal such as gold plating.

The present invention is a new manufacturing jig that applies plating only to the essential parts in such cases.

The conventional plating method in this case will be explained with reference to FIGS. 1 to 3.

In the figure, 1 is a printed wiring board, and 2 is a terminal section inserted into a connector, which is provided in large numbers in parallel as shown in the figure, and is also provided at the same position on the back side of the wiring board.

Reference numeral 3 denotes a common conductive path for supplying current during plating of the terminal 2, and this portion (the portion outside the chain line in the figure) is cut and removed after plating.

4 shows the state in which the insulating tape used for level control during plating is applied.

By suspending plating in this way so that the H-H line in the figure is at the level of the plating liquid, the terminals will be plated in a straight line, giving a good finish (the tape will be removed later).

) FIG. 2 shows another specific example that does not require the use of the common conductive path 3.

In this method, the insulating tape 4 is attached to a copper-clad wiring board 5 on which the terminal portions 2 shown in the figure have been formed in advance, and plating is performed.

Also, a jig may be used in which contact springs 6 as shown in FIG. 3 are applied to both sides of the wiring board 1 and current is supplied through the springs.

The figure shows, for example, the spring 6 in contact with the terminal position where the terminal is cut along the line AA' in FIG.

The method using this jig has the disadvantage that the plating thickness tends to vary depending on the quality of the contact at the contact points shown in FIG. 7.

As is known from the above-mentioned method, in the method of forming an electric path as a plating power supply connection means, in FIG. 1, the common conductive path 3 is separately prepared and cut and removed after completion of plating, which eliminates the waste of material of the wiring board 1. There is also loss on the cutting and removal side, such as the adhesion of expensive metals, and although there is no waste or loss in Figure 2, a series of circuit patterning processes (exposure baking, development, etc.) are required in the main plating process. This method has the disadvantage that it requires a lot of man-hours because etching, etc.) is required, and that it also takes time and effort to attach the tape 4 for controlling the plating level.

The purpose of the present invention is to eliminate such drawbacks and present a terminal plating jig with excellent workability.The main features of this device are a flexible conductor connected to the plating power supply and an insulating rubber on the rear part of the conductor. This jig is equipped with a pressure plate that applies an appropriate load.

This will be explained below with reference to FIG.

A in the figure is a state diagram of the printed wiring board 1 to be plated and the terminal plating jig of the present invention being attached, and the same figure is an explanatory diagram of the function of the jig in the AA' cross section of A.

In the figure, reference numeral 8 denotes a flexible conductor connected to a power source, which is made of conductive rubber or conductive plastic, and has the same function as the common conductive parts 3 and 5 in the previous figure.

9 is a pressure plate that strongly presses the conductor 8 to the terminal conductor film 2 of the printed wiring board to ensure a secure connection (see thick arrow in the figure);
10 is appropriately elastic insulating rubber.

The pressure plate 9 is formed from a metal body or a non-metallic rigid body, but in the case of a metal body, it is preferable to coat the plate surface with epoxy resin to prevent contamination with the plating solution caused by this jig.

11 (Figure A) shows that the pressure plate 9 is tightened to apply the load indicated by the arrow above through the through-hole of the screw, but in the jig of the present invention, such tightening is not limited to the mechanism, and one side is hinged. , the other may be a croc clip type pressurizing method.

If the plating is performed in this manner, the plating liquid will not enter the area that is in contact with the insulating rubber 10, so that the plating will be uniform in a straight line like the diagonal lines on the terminal 2, similar to conventional tape attachment.

Of course, the man-hours such as taping are completely unnecessary.

Also, expensive precious metals will not adhere to jigs or other unnecessary parts.

According to the edge pre-fixing jig of the present invention described above, connector terminal plating of printed wiring boards arranged in large numbers can be effectively performed even in the case of wiring boards with metal cores and general wiring board mounting methods. It has great practical effects, such as improved plating work ability and cost reduction.

[Brief explanation of drawings]

Figures 1 to 3 are diagrams explaining the conventional plating method, and Figure 4 is a diagram explaining the conventional plating method.
The figure shows a jig for pre-attaching the edges of a printed wiring board according to the present invention. In the figure, 1...Printed wiring board, 2...Terminal section of 1, 3 and 5...Common conductive path, 6...
・Contact spring, 8...Flexible conductor, 9...
・Rubber pressure plate, 10...Insulating rubber, 11...
... Screw holes for fastening the pressure plate 9.

Claims (1)

[Scope of utility model registration request] Printed wiring for precious metal plating of a large number of terminals arranged, characterized by comprising a flexible conductor connected to a plating power source and a pressure plate for applying an appropriate load as well as insulating rubber to the rear of the conductor. Jig for plating board terminals.