JP2979564B2 - Printed circuit board terminals - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal for a printed circuit board of an electronic component such as a connector or a switch which is mounted on a printed circuit board by soldering.

2. Description of the Related Art A conventional technique will be described with reference to terminals of a printed circuit board connector (hereinafter referred to as a connector) shown in FIGS.

FIG. 2 is a side sectional view showing a use state of a connector for connecting printed circuit boards, and a conductive foil of two printed circuit boards A and B;
Narrow narrow linear legs 3, 3 'which are the terminal portions of connector C between 1, 2
Are electrically connected to each other by soldering 9, 9 '. FIG. 3 (a) is a partial cross-sectional plan view for explaining the manufacturing process of this connector. According to the figure, this connector C is composed of a plurality of connectors 30 and molded base portions 6, 6 '.
Are formed by pressing a thin metal plate, and both ends thereof are narrow straight leg portions 3 and 3 'for inserting a printed circuit board, as shown in the side view of FIG. Is formed into a chevron-shaped rib over the entire length. 4, 4 'are connecting bars for connecting a plurality of connecting bodies 30 at a fixed pitch with each other, and 5 are narrow connecting means connecting between narrow straight legs 3, 3' at both ends of each connecting body 30. The part has flexibility.

The narrow-hatched portions between the narrow straight leg portions 3 and 3 'on both sides of the connecting member 30 and the connecting bar portions 4 and 4', which are hatched at a small pitch in the drawing, are formed in the forming base portions 6 and 6 '. After insert molding, the connecting bars 4, 4 'are cut to produce the printed circuit board connecting connector shown in FIG.

In the figures, reference numerals 7, 7 'denote recesses for reinforcing the strength so that the portions formed by insert molding with the molding resin do not shift and do not come off even if pulled before mounting.

SUMMARY OF THE INVENTION However, in the connector of the above-described conventional type, the narrow linear legs 3, 3 'serving as terminals to be inserted into the holes of the printed circuit board are transported or inserted during the printed circuit board hole inserting operation. There is a drawback that it is easily deformed.

That is, even if the narrow straight leg portions 3 and 3 'are processed into the shape of a chevron-shaped rib over substantially the entire length, the boundary portions 8 with the formed base portions 6 and 6',
8 'cannot be provided with a mountain-shaped rib because a resin cutting part of the molding die is required, and when a deformation force is applied to the terminal during transportation or insertion work of the printed circuit board hole, this mountain-shaped rib is attached. The narrow straight legs 3, 3 'would bend at the unbounded boundaries 8, 8'.

Means for Solving the Problems In order to solve the above problems, the present invention provides a mountain-shaped rib halfway through a wide flat portion at the base of the terminal portion, leaving a flat portion for cutting a resin of a molding die, and forming a molding base portion. The wide flat portion is provided around the rib and is fixed by being buried in the molded base portion so that there is no easily deformable portion at the tip of the terminal portion.

According to the present invention, therefore, according to the present invention, the chevron ribs are provided in a series from the narrow straight leg to a part of the base wide flat portion, and the narrow straight leg and the wide which deteriorate the deformation strength of the terminal portion. Since the chevron ribs are also provided at the boundaries of the flat portions, the deformation strength of the terminal portions does not deteriorate, and a terminal for a printed board which is very resistant to deformation can be provided.

Embodiment An embodiment of a printed circuit board terminal of the present invention will be described with reference to FIG. 1 which is a plan view for explaining a process of manufacturing a printed circuit board connector.

Connector connector 10 formed by pressing a metal sheet
The narrow straight legs 12, 12 'of the terminals 11, 11' provided continuously at both ends of the terminal are provided with chevron ribs 13, 13 'over the entire area so that the terminals are not easily deformed. At the same time, the angled ribs 13, 13 'are provided halfway of the wide plane portions 14, 14' of the terminal portions 11, 11 '.

Then, the periphery of the wide flat portions 14, 14 'is buried and fixed to the resin wall portions 17, 17' provided between the terminals, except for the end faces 16, 16 'on the protruding side of the leg portions. Formed base portions 18, 18 'are formed.

The end surfaces 19, 19 'of the resin wall portions 17, 17' are connected to the leg-projecting end surfaces 16, 1 of the wide plane portions 14, 14 'of the terminal portions 11, 11'.
The end faces 19, 19 'are configured to be in contact with the printed circuit board when the printed circuit board is mounted.

As described above, the angled ribs 13 and 13 ′ have the narrow straight leg portions 12 and 13 ′.
Since the terminal is provided in the whole area of 12 'and in the middle of the wide plane portions 14, 14', the deformation strength of the terminal is increased. Especially,
The narrow straight legs 12, 12 'and the wide flat 1
Since the angled ribs 13 and 13 'are also provided at the boundary with the terminals 4 and 14', the deformation strength of the terminal is significantly improved as compared with the conventional case.

Reference numerals 21 and 21 'denote connecting bars connecting the plurality of connecting bodies 10 at a constant pitch, and reference numeral 15 denotes a narrow connecting part connecting between the terminal parts 11 and 11' at both ends. Is the molding base 1
After the insert molding in 8,18 '
1, 21 'are cut to form a printed circuit board connector similar to that of the prior art shown in FIG.

And, since the boundaries with the resin wall portions 17 and 17 'are provided on the surrounding flat portions of the wide flat portions 14 and 14' except for the chevron ribs 13 and 13 ', the resin cutting of the molding die is facilitated. At the same time, the end faces 19, 19 'are used as contact parts when mounting the printed circuit board.
It is possible to provide a printed circuit board terminal that can be stably mounted.

The present invention, as is apparent from the above embodiment, is configured such that a narrow and easily deformable terminal is provided with a chevron-shaped rib in the middle of a wide-width flat portion and the periphery thereof is covered with a molded base portion. Yes, by eliminating the easily deformable part of the terminal,
It is possible to provide a printed circuit board terminal in which the deformation strength of the terminal is greatly improved.

[Brief description of the drawings]

FIG. 1 is a plan view for explaining a manufacturing process of an embodiment of a connector having printed circuit board terminals according to the present invention. FIG. 2 is a side sectional view of a conventional connector having printed circuit board terminals when the printed circuit board is mounted. FIG. 3 (a) is a plan view of a partial cross section for explaining a manufacturing process of the connector, and FIG. 3 (b) is a side view of a straight leg portion. 10 ... Connected body, 11 ... Terminal part, 12 ... Narrow linear leg,
13… chevron rib, 14… wide flat part, 15… narrow connecting part, 16… leg end protruding side end face, 17… resin wall part, 18…
Molded base part.

Claims (3)

(57) [Claims] 1. A thin linear leg protruding from a molded base portion for inserting a printed circuit board made of a thin metal plate, and a wide flat portion at the base, and extending from the entire area of the narrow linear leg to the middle of the wide flat portion. A printed circuit board terminal characterized by having a series of angled ribs up to and including a wide flat surface portion and the periphery of the angled rib excluding the leg protruding side buried in a molded base portion. 2. A resin wall portion integral with a molding base portion is provided between a plurality of printed circuit board terminals arranged in parallel on the same plane, and the resin wall portion is positioned on the left and right sides by the resin wall portion. 2. The printed circuit board terminal according to claim 1, wherein the terminal is formed by embedding the periphery of a chevron rib in a wide flat portion at the base of the narrow straight leg portion of the terminal. 3. A contact portion with a printed circuit board is formed by projecting an end surface of a resin wall portion from an end surface on a leg protruding side of a wide flat portion at the base of a narrow linear leg portion. Claim 1
Or the printed circuit board terminal according to 2.