JPH0278171A - male connector - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Summary] It relates to high-density connectors, especially surface-mount male connectors that have a small contact arrangement pitch and can be manufactured at low cost. The purpose of this connector is to reduce the number of parts by double-molding the contact area of the connector, and to provide a male connector for surface mounting that has a high-density and high-precision contact arrangement. A rod-shaped insulating base with a substantially inverted T-shaped cross section, consisting of a base mounted on a printed board and an insertion part that protrudes upward from the base and is fitted into a mating female connector; A plurality of surrounding band-shaped contact areas are formed at a predetermined pitch by double molding of a plateable resin, and metal is deposited on the contact areas by plating.

[Industrial application field]

The present invention relates to a high-density connector, and particularly to a surface-mount male connector that has a small contact arrangement pitch and can be manufactured at low cost.

With the increasing density of electronic devices, the number of terminals of connectors mounted on printed boards is increasing and the density is increasing, and for this reason, the printed boards to be mounted do not have through holes for terminal insertion, and connecting bands on the surface of the printed boards are used instead. Surface mounting, in which the terminals of the connector are directly soldered, has come to be widely used. There is a demand for providing such connectors at low cost.

[Conventional technology]

The conventional male connector for high-density surface mounting is
It is shown in Figure 4.

In the figure, the male connector (plug connector) 1 is
an insulating base 11 made of an insulating resin molded product;
It consists of a plurality of contacts 12, and the soldering of the temporary print 4 is reflow soldered to the pad 41.

A plurality of contact press-fit holes are formed at a predetermined pitch in the insulating base 11, and the contact portions 1 are separately manufactured from a metal material such as a copper alloy through press working or continuous plating.
2a and a contact part 2 having a terminal part 12c for surface mounting.
has been press-implanted.

[Problems to be Solved by the Invention] Due to the increasing density of electronic devices, the contact arrangement pitch is changing from the conventional standard of 2.54+nm to half that, for example, 1°27mm (half-pitch connector). As the contact pitch becomes smaller in this way, conventional male connectors in which the contacts are press-fitted,
There was a problem in that the partition walls between the contact press-fit holes in the insulator became thin, and press-fit cracks occurred when the contacts were installed.

In addition, the number of components is large because it requires an insulating base made by a molding process and a plurality of contacts made by press working or continuous plating.
There is also the problem of increased costs because an assembly process is required to implant the contacts in the insulator.

Furthermore, in order to achieve good glue flow soldering when mounting on a printed circuit board, it is desirable that the terminals of multiple contacts are arranged with high precision on the same plane, but individual contacts are Therefore, it also had the disadvantage of poor accuracy.

The present invention was created in view of the above problems, and it reduces the number of parts by double-molding contacts made of conductive resin on an insulating substrate, and has a high-density and high-precision contact arrangement for surface mounting. The purpose is to provide a male connector for.

[Means to solve the problem]

The above problem is that the product is made of a non-platable resin molded product, and has an approximately inverted T-shaped cross section consisting of a base on which the print is temporarily mounted, and an insertion portion that protrudes upward from the base and is fitted into the mating female connector. A rod-shaped '4tA8! A base body and a plurality of band-shaped contact areas surrounding the outer periphery of the m-edge base body are formed at a predetermined pitch by double molding of a plateable resin, and the contact areas are coated with metal by plating. This is solved by the male connector of the present invention.

[Effect]

Since the contact area is integrally formed with plating resin on the insulating base by double molding, there is no need to manufacture the contacts separately from the insulating base by press processing or to implant the contacts into the insulating base. Contacts can be arranged with high precision and high density. For this reason, the basic constituent members of the connector can be molded in pieces, and manufacturing costs can be significantly reduced by reducing component costs and requiring no assembly man-hours. Further, since it is not necessary to press-fit and fix the contacts, a high-density contact arrangement can be achieved.

〔Example〕

The present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is an external perspective view of a male connector of the present invention, FIG. 2 is a sectional view of a contact area, and FIG. 3 is a diagram showing a manufacturing method.

In FIG. 1, the male connector 2 of the present invention has a base portion 21 with a square cross section on the lower side, and an insertion portion 22 protruding above the base portion 21.
It is a rod-shaped molded integrally molded product having a substantially inverted T-shaped cross section, and the lower surface 21a or side surface 21b of the base 21 is a surface to be reflow soldered to a pad of a printed board,
Further, the insertion portion 21 serves as a plug portion that is inserted into a mating female connector.

As will be described later, on the surface of the rod-shaped body, a plurality of strip-shaped contact regions 23, in which grooves 24a are filled with conductive resin and metal-plated, surround the outer periphery.
They are formed with an arrangement pitch of 27 mm.

FIG. 2 shows a cross section taken along line AA in FIG. 1 along with a mating female connector to show the layer structure of the contact area.

In the figure, 3 is a mating female connector that is inserted into the male connector 2 of the present invention, and a plurality of female contacts 31 having U-shaped spring contact portions 31a correspond to the arrangement pitch of the contact areas of the male connector. They are embedded in the insulator 32 (in parallel in the direction perpendicular to the plane of the paper).

The contact area of the male connector 2 consists of a second molded part 25 formed by double molding a plateable resin in a strip shape around an insulating base 24 made of a first molded product made of a non-platable resin. The surface of the portion 25 is coated with a metal plating layer 2 having a three-layer structure of Cu and Ni/Au, for example.
6 is deposited to a desired thickness by electroplating as a conductive material and a contact material.

Reference numeral 4 denotes a printed circuit board on which the main connector 2 is mounted, and the soldering on the surface is well achieved by a pad 41 and a metal plating layer 26a on the lower surface of the base 21 having excellent flatness with a sharp flow solder 42.

1, the first insulating molded product remains exposed on the surface, and there is no metal plating layer, so the contact area is independently connected to a plurality of conductive parts. Become.

FIG. 3 shows an example of the manufacturing method. First, the insulating base 24 shown in FIG.
to form. (First molding) The insulating base 24 has an insertion portion 22 having a thickness corresponding to the mating female connector, and a plurality of strips surrounding the outer periphery at a predetermined arrangement pitch in a portion corresponding to the contact area. A groove portion 24a is formed.

Next, the insulating base 24 is attached to a second molding die, and conductive plating grade PPS resin is injection molded into the plurality of grooves 24a by double molding, as shown in FIG. , 111! in a band shape in the part corresponding to the contact area. ! ! Surrounding the edge base 42 (forming a plurality of second molded parts 25).

In this way, the contact area is formed by double molding,
Since the width and arrangement pitch are controlled by the precision of the mold, it is possible to arrange them with extremely high precision, and the boundary between the first molding resin and the second molding resin is melted and joined, so there is no joining. It has great strength and can be considered an integrally molded product.

Since this second molding is performed using a multi-gate mold in which a gate 25a is formed in each second molding part 25, the plurality of contact regions are electrically connected by the gate 25a and the runner part 25b. A molded article is obtained.

Next, using this launch part 2Jb as a plating electrode,
Electroplating is performed only on the second molded part 25 where the conductive plateable resin is exposed on the surface to form a contact area. By applying a plating voltage to the launch portion 25a, plating current can be easily supplied to a plurality of contact regions, and the electroplating of cu and Ni/Au can be easily achieved to a predetermined thickness.

By cutting the gate 2ia after the plating process, the contact regions corresponding to the number of grooves can be easily separated, and a plurality of mutually insulated contacts can be obtained.

〔Effect of the invention〕

As explained above, according to the present invention, the number of male connector parts can be reduced to one, and the assembly process of implanting contacts in an insulator is not required, so a high-density connector can be manufactured at low cost. It becomes possible to do so.

[Brief explanation of the drawing]

Fig. 1 is an external perspective view of the male connector of the present invention, Fig. 2 is a sectional view of the contact area, Fig. 3 is a diagram showing a method of manufacturing the male connector of the present invention, and Fig. 4 is a conventional surface mount connector. FIG. 2 is a diagram showing a male connector. In the figure, 2--male connector, 21--base, 22-
- Insertion part, 23--Contact area, 2
4-Insulating base, 24a-Groove portion, 25-Second molded portion, 26-.-Metal plating layer. Kita Moeto J Hikomurari n Outer thighs 7 ton map A 1 Diagram 77F Inmember fbe m view No. 2 Figure (a) Snoring A-shaped rear (1) N 2nd A Left side rear Insufficiency gF4tnJ Sho connection 7 ri n construction method blocking Σshow T diagram 3
figure

Claims (1)

[Claims] Consisting of a base (21) made of a non-platable resin molded product and mounted on a printed board, and an insertion part (21) that projects upward from the base and is fitted into a mating female connector. A rod-shaped insulating base (24) having a substantially inverted T-shaped cross section, and a plurality of band-shaped contact areas (23) surrounding the outer periphery of the insulating base (24) are formed at a predetermined pitch by double molding of a plateable resin. , the contact area (23
) is coated with metal by plating.