JPH0143820Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a terminal for a board.

(Conventional technology) As a terminal for conventional circuit boards, JP-A-51-
There is one described in Publication No. 511699. As shown in FIG. 1, the tip of this protrudes through the hole Pa of the substrate P to the back side, and the protruding end is filled with solder, but the length L1 of this protruding end 16 is approximately 3.5
Since the terminal is long (about 1.5 mm), the crimp portion 13 of the terminal is actually cut by approximately 1.5 to 2 mm to prevent short circuit with other elements.

(Problems to be Solved by the Invention) However, since the crimp portion 13 is very hard, the cutting blade is easily damaged, and the efficiency of the cutting process is reduced. Further, since the lance 14 provided on the lower surface between the core wire covering part 12 and the crimping part 13 extends linearly, there is a drawback that the lance is weakly caught on the back surface of the substrate P. Furthermore, since the notch 15 formed on the upper surface between the core wire covering part 12 and the crimping part 13 is hook-shaped, there is still room for improvement in improving solder coverage.

The purpose of the present invention is to eliminate the above-mentioned drawbacks and to improve solder deposition.

(Means for Solving the Problems) The feature of the present invention is that it is composed of a lead wire covering crimping section, a core wire covering section, and a core wire crimping section formed in series, and a gap between the core wire crimping section and the core wire covering section. A lance having a bending part at the tip is provided on one side of the
A dish-shaped notch with both ends cut out is formed on the other side, and the terminal tip can protrude from the hole in the board to the back side, and the length of the protruding end is approximately 1.2 to 2.0 mm.
mm, the lance and the notch can be positioned on the back side of the substrate, and the protruding end can be supported by the substrate with solder.

(Example) An example of the present invention will be described below based on the drawings.

In FIGS. 2 to 4, the board terminal is composed of a lead wire covering crimping section 1, a core wire covering section 2, and a core wire crimping section 3 formed in series. The covering crimping part 1 crimps the covering part at the tip of the lead wire S, the core wire covering part 2 covers the core wire W exposed from the covering part, and the core wire crimping part 3 crimps the leading end of this core wire. ing. A lance 4 is cut and raised on the back surface between the core wire covering part 2 and the core wire crimping part 3. The distal end of the lance 4 has a bent portion 4a bent outward, and this bent portion increases the restoring force of the lance and increases its ability to hook onto the back surface of the substrate P. Further, on the opposite side of the lance 4, notches 5, 5 are provided, and the notches are formed into a dish shape with both ends cut into the back side in order to improve the solder build-up.

Here, the state in which the terminal is attached to the board P will be explained based on FIG. 2. The tip of the terminal protrudes from the hole Pa of the board P toward the back side. The length L of this protruding end 6 is set within a range that does not short-circuit with other elements (not shown), that is, approximately 1.2 to 2.0 mm. The protruding end 6 is soldered and supported by the substrate P.

(Effects of the invention) As explained above, according to the invention, the notch is formed into a dish shape, which facilitates soldering work, improves the solder build-up, and shortens the protruding end of the terminal from the hole in the board. Therefore, it is possible to prevent short-circuiting of other elements, and there is no need to cut the core wire crimping portion as in the conventional method, thereby improving the efficiency of assembly work. Since the bending part is formed at the tip of the lance, the restoring force can be increased, and the lance can be more easily caught on the substrate.
Furthermore, since the notch has a shape with both ends cut out, it is possible to improve the solder buildup, and since the notch is formed into a dish shape, the soldering work is easier and the solder buildup is even better. This has the effect of allowing a large amount of molten solder to penetrate between the core wires of the lead wires, thereby strengthening the bond between the lead wire, the terminal, and the board.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view showing how the conventional terminal is installed, Figure 2 is a cross-sectional view showing how the terminal of the present invention is installed, Figure 3 is a front view of the terminal of the present invention, and Figure 4 is Figure 3. - It is a line cross section. 1... Lead wire covering crimping part, 2... Core wire covering part, 3... Core wire crimping part, 4... Lance, 4a...
Bent part of the lance, 5... Notch part, 6... Projecting end of the terminal.

Claims (1)

[Scope of Claim for Utility Model Registration] It is composed of a lead wire covering crimping part, a core wire covering part, and a core wire crimping part formed in series, and a tip part is provided on one side between the core wire crimping part and the core wire covering part. A lance having a bending part is provided, and a dish-shaped notch is formed on the other side with both ends cut out, and the terminal tip part can protrude from the hole in the board to the back side, and the length of the protruding end is 1. A terminal for a board, characterized in that the lance and cutout portion can be located on the back side of the board, and the protruding end can be supported by the board by solder filling.