JPH0419984A - Manufacture of pin connector for mounting on printed wiring board - Google Patents

Abstract

PURPOSE:To obtain pin connectors for mounting on a high packaging density printed wiring board by subjecting the upper and lower rectilinear portions of contact pins each curved into the shape of a crank to ultrasonic welding in such a manner that intervals between those parts of the contact pins which project into box housing are smaller than those between the downwardly projecting portions of the pins. CONSTITUTION:The crank curved portion 16A, 16B, 16C, 16D of each contact pin is so oriented as to be fitted between parallel projecting portions for welding and is inserted into each small hole and a molding resin is melted by ultrasonic welding method in such a manner as completey covering each crank curved portion, and each contact pin is fixed on the bottom face of housing and a rectilinear contact pin 13o is also fixed on the bottom face of the housing by ultrasonic welding method to form pin connectors for mounting on a printed board. The rectilinear contact pin 13o is located at the center and a plurality of contact pins 13A, 13B, 13C, 13D each curved into the shape of a crank are disposed in symmetry with respect to the center of this contact pin arrangement and are each oriented such that intervals between the lower portions of the contact pins are greater than those between the upper portions of the contact pins each of which is inside the housing.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method of manufacturing a pin lid for mounting a printed circuit board, which is used for mounting on a printed circuit board of an electronic device.

Conventional Technology No. 3 and Figure 4 show a conventional manufacturing method for a pin connector for mounting on a printed circuit board. Small holes 2A, 2B, 2C provided at intervals.
Linear contact pins 3A, 3B, 3C for...
A pin connector is formed by press-fitting... The contact pin upper portions 4A, 4B, 4C, etc. that protrude inside the box-shaped housing 1 serve as connecting parts with the connector/socket side, and the contact pins that protrude outward from the bottom surface of the box-shaped housing 1. Lower part 5A, 5B,
5C... are legs for connection to the printed circuit board.

Here, the outer diameters of the contact pins 3A, 3B, 3C... and the inner diameters of the housing bottom holes 2A, 2B, 2C... are press-fitted with a slight dimensional difference, but the contact pins 3A, 3B, 3C... A convex portion 6 provided at the intermediate portion of...
A, 6B, 6C... are housing bottom holes 2A, 2B,
It stops in a state where it is firmly press-fitted into 2C...,
It serves to prevent contact pins 3A, 3B, 3C, etc. from being removed.

Problem to be Solved by the Invention However, in the conventional pin connector for mounting a printed circuit board, the straight contact pins 3A, 3B3C, etc., having the protrusions 6A, 6B, 6C, etc. for preventing removal are attached to the bottom surface of the housing 1. Since it is only a matter of press-fitting into the small holes 2A, 2B, 2C... of the housing, the upper part of the contact pin protruding into the housing l, that is, the connecting part 4A, 4B, 4C... with the connector socket side, and the housing. 1 Lower contact pins protruding from the bottom 5A, 5B, 5C...
That is, the printed circuit board connecting legs are arranged at the same intervals.

On the other hand, in recent years, with the miniaturization and high-density packaging of electronic devices, the pin spacing at connector/socket joints has tended to become narrower, and pins with a spacing of two pins or less have become increasingly used. With such a narrow spacing, there is a problem that it becomes difficult to secure a land around the printed circuit board hole corresponding to the printed circuit board connection leg.

In addition, as shown in FIGS. 5(a) and 5(b), in order to prevent floating of pin connectors for automatic mounting after mounting on the printed circuit board, lower contact pins 5A, 5B protruding from the back surface of the printed circuit board, In the method of folding 5C...,
There was a problem in that the insulation distance between the bent contact pin and the adjacent contact pin connection land 7 was lost.

The present invention solves these conventional problems,
It is an object of the present invention to provide a method for manufacturing an excellent high-density mounting pin connector for mounting a printed circuit board, which can be easily connected to a printed circuit board even if the contact pin spacing at the connection portion with the connector socket is small.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention has provided that the distance between the upper and lower straight parts of the contact pin bent into a crank shape that protrudes into the inside of the box-shaped hanging is larger than that of the housing. After fitting and aligning the pin holes in the housing l so that the spacing is smaller than the distance between the lower parts of the nozzing, the contact pin crank part is covered with the resin on the bottom wall of the nozzing using ultrasonic welding. It is designed so that it can be firmly fixed.

Function: With the means for solving the above problem, each contact pin is crank-bent and the dimensions of the crank-bent portion are changed so that the arrangement of the upper part protruding into the housing l and the lower part protruding into the housing l is achieved. Since the spacing can be changed independently, the spacing between the contact pins at the connecting portion with the connector/socket can be small, and the spacing between the printed circuit board connecting legs can be increased.

EXAMPLE Hereinafter, an example of the method of manufacturing a pin connector for mounting on a printed circuit board according to the present invention will be described with reference to the drawings. In FIG. 1, small holes are made in the bottom surface of a resin-molded box-shaped housing 11 at the same intervals as the pin spacing for mounting on the printed circuit board side of the connector, and parallel convex welding holes are formed on the inner bottom surface of the housing adjacent to each small hole. Parts 12A, 12B, 12C,
12D is provided. The contact pin is made by bending a wire such as a wire with a constant diameter into a crank shape, and the dimensions of the intermediate crank bent part vary depending on the pin mounting hole spacing on the printed circuit board side 13A, 13B, 13c ,1
3D and a straight crank pin 13o are prepared. Contact pin crank bent parts 16A, 16B, 16C1
6D is inserted into each small hole in the direction that it will fit between the parallel convex parts for welding, and the parallel convex parts for welding and the molding resin around these are ultrasonic welded so as to cover the crank bending part. The contact pins were melted and fixed to the bottom surface of the housing, and the linear contact pins 130 were also fixed to the bottom surface of the housing by ultrasonic welding to form a pin cap for mounting a printed circuit board as shown in FIG. At this time, the upper straight parts 14A and 14B of the crank-shaped contact pin
, 14C, 14D are spaced the same as the pin spacing of the connector socket joint, and the lower straight portions 15A, 15B, 15C, 15D of the crank-shaped contact pins are spaced the same as the pin spacing of the printed circuit board mounting pin connector. A contact pin was placed.

First, a linear contact pin 13o is arranged at the center, and a plurality of contact pins 13A are crank-bent.
, 13B, 13C, and 13D are arranged symmetrically from the center of the contact pin arrangement in a direction in which the arrangement interval at the bottom of the contact pins is larger than the arrangement interval at the upper part of the contact pins on the inside of the housing. This will reduce placement errors and make the work easier. It was easy.

Effects of the Invention As is clear from the above embodiments, the present invention has the following effects.

(1) The spacing between the pins on the printed circuit board connecting leg side can be made larger than the pin spacing on the socket side coupling part of the pin connector, so even connectors with narrow spacing between the socket coupling parts can easily fit around the printed circuit board hole. It is possible to secure a wiring land of only the required size.

(2) In automatic mounting pin connectors in which the lower portions of some of the contact pins are bent after being mounted on a printed circuit board, the spacing between the connecting legs can be made as wide as necessary.

(3) Since the contact pin is fixed by melting the resin using ultrasonic welding so as to cover the crank bent part of the contact pin, the pin is securely fixed to the housing and the gap between the pin and the mounting hole is Failures caused by solder flux etc. passing through and entering can be prevented.

[Brief explanation of the drawing]

Figures 1 and 2 are diagrams for explaining the manufacturing method of the pin connector for mounting on a printed circuit board according to the present invention. Figure 1 is a perspective view of a box-shaped housing and a contact pin, and Figure 2 is a perspective view of a box-shaped housing and a contact pin. FIG. 3 is a perspective view after the contact pin is fixed by ultrasonic welding after press-fitting the contact pin. 3 and 4 are diagrams for explaining the manufacturing method of a conventional pin connector for mounting on a printed circuit board. FIG. 3 is a perspective view of the components before assembly, FIG. 4 is a front view after assembly, and FIG. Figure 5 (
Fig. 5(a) is a front view showing the state after the pin cover lid is attached to the printed circuit board, and Fig. 5(a) is an enlarged bottom view of portion A of Fig. 5(a). 11...Box-shaped housing, 12A, 12B, 1
2C, 12D...Parallel convex part for welding, 130...
...straight contact pin, 13A, 13B, 13
G, 13D...Contact pin, 14A, 14
B, 14C, 14D... Upper straight part of contact pin, 15A, 15B, 15C, 15D...
Lower straight part of contact pin, 16A, 16B, 16C
16D... Crank bent part of contact pin. Name of agent: Patent attorney Shigetaka Awano and one other person Figure 2t! 1 Figure Figure Figure (a->

Claims (1)

[Claims] The upper or lower straight parts of multiple contact pins are crank-bent in advance and the positions of the upper and lower straight parts are shifted parallel to each other, and the upper or lower straight parts are implanted into the pin holes on the bottom of the resin-molded box-shaped housing. The pin spacing on the printed circuit board mounting side is larger than the pin spacing on the connection side with the contact pins, and the pins are arranged symmetrically from the center of the arrangement of the contact pins. The contact pin is fixed to the box-shaped housing by melting and deforming the resin and covering the crank bent part of the contact pin with the resin, so that the upper part of the contact pin protrudes inside the box-shaped housing and the lower part of the contact pin protrudes outside the bottom surface of the box-shaped housing. A method for manufacturing pin connectors for mounting on printed circuit boards.