JPS61185877A - Terminal staking - 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 Field of the Invention The present invention relates to a method for caulking terminals of small electronic components used in various small electronic devices such as small radio receivers.

2. Description of the Related Art In recent years, miniaturization of electronic devices such as radio receivers has become mainstream, and electronic components used in electronic devices must be small in size. For this reason, in order to miniaturize electronic components, it is also necessary to miniaturize the terminals that electrically connect the printed circuit board of the electronic device and the electronic components.

Therefore, with regard to the terminal adhesion strength of conventional small electronic components, as the drawing diameter of the terminal has become smaller due to the miniaturization of parts, the adhesion strength cannot be maintained only by curling the drawing part, and the curling part is further bonded. It was fixed with adhesive etc.

FIG. 6 shows the completed state. In the figure, 1 is an insulating substrate, 2 is a conductive part thereof, 3 is a round hole provided in the conductive part 2,
4 is a terminal whose constricted part is inserted into one of the round holes 3, and 6 is a curled part that is applied to the tip of the constricted part of the terminal 4 that has passed through the round hole 3, and this curled part 6 is further attached to the insulating substrate. 1 with adhesive or the like.

Problems to be Solved by the Invention However, with this method, there are problems such as the labor cost of applying the adhesive, the influence of the adhesive solvent on the human body, and the difficulty in controlling the adhesion to other parts. was there.

An object of the present invention is to provide a terminal caulking method that can maintain the fixing strength of the terminal without using an adhesive even in the case of a terminal having a small aperture diameter.

Means for Solving the Problems In order to solve the above problems, the terminal caulking method of the present invention involves inserting the constricted portion of the terminal into a round hole provided in the conductive part of an insulating substrate, and After curling the tip of the part, a concave part was formed on the upper surface of the curling part so that a part of the curling part bit into the opening edge of the round hole.

In other words, according to the present method, in addition to the curling process of the terminal drawing part, sufficient fixing strength can be obtained by performing the concave process which is low in labor cost and does not have any adverse effects on the human body. , it is possible to achieve stronger fixation against forces in the rotational direction and the like than with adhesives.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to FIGS. 1 to 5, taking a terminal fixing portion of a variable resistor as an example.

In the figure, 1 is an insulating substrate, 2 is a conductive part thereof, 3 is a round hole provided in the conductive part 2, 4 is a terminal made of a metal plate,
5 is a constricted portion of the terminal 4. As will be described later, 6 is a curling part formed on the tip of the constricted part 5, 7 is a concave part formed on the upper surface of the curling part 6, and 8 is a concave part formed at the opening edge of the round hole 3. This is the cut-in part.

With such a configuration, first, the terminal 4 is inserted into the round hole 3 of the insulating substrate 1.
Insert the aperture part 5 (in the figure, it is inserted from the bottom)
. Next, the tip of the constricted portion 5 that has passed through the round hole 3 is curled. Then, a concave part is formed on a part of the upper surface of the curling part 6, and a part of the curling part 6 is cut into a circular hole 3.
Insert it into the edge of the opening. This makes it possible to achieve stronger fixation against forces such as in the rotational direction than when fixing with adhesive. Note that the right half of FIG. 5 shows the state before the recessed portions are processed, and the left half shows the state after the recessed portions are processed.

Effects of the Invention According to the present invention, labor costs are not as high as in the past, and there is no adverse effect on the human body. Further, there is no need to manage the adhesive so that it does not adhere to other parts. In addition, the adhesion strength has been improved by about 50% compared to conventional ones, and the bite of the eye area makes it more stable against heat shrinkage of the insulating board caused by soldering heat when it is attached to the printed circuit board of electronic equipment. Electrical connection can be obtained.

[Brief explanation of the drawing]

Figures 1 to 5 explain the method of the present invention. Figure 1 is a perspective view of a terminal fixed to an insulating substrate, and Figure 2 is an insulating substrate with a conductive part and a round hole before the terminal is fixed. 3 is a perspective view of the terminal with a constricted part, FIG. 4 is an enlarged view of the terminal fixing part, FIG. 5 is a sectional view of the terminal fixing part, and FIG. FIG. 3 is a plan view of the terminals fixed to each other. 1... Insulating substrate, 2... Conductive part, 3... Round hole, 4
... Terminal, 5... Squeezed part, 6... Curling part, 7... Concave part, 8... Biting part

Claims (1)

[Claims] 1. Insert the constricted part of the terminal into the round hole provided in the conductive part of the insulating substrate, curl the tip of the constricted part that passed through the round hole, and then create a recess on the top surface of the curled part. A terminal caulking method in which a part of the curled part is bitten into the opening edge of the round hole.