JPS58145101A - Electronic part - 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 The present invention relates to electronic components, and particularly discloses a technique that enables external connection members of electronic elements having various shapes and functions to be connected to a substrate by spot welding.

Electronic components such as ordinary resistive elements have long leads at both ends, and these leads are connected to the printed wiring on the board by soldering, but such leads can be used to automate the connection work. Since this is not desirable for mechanization, various dressing techniques have recently been proposed that eliminate the need for leads.

As an example, as shown in FIG. 1A to Di, an insulating coating 2 is applied to the center part of a columnar resistance element 1,
In addition, after plating 3 on the remaining end portions, the cap 4
There are some that are used as electronic parts by covering them.

As shown in FIG. 2, the central part of this electronic component coated with insulating coating 2 is adhered and fixed to a board 6 with adhesive 5, and then gaps 4 at both ends are connected to predetermined printed wiring 7. After soldering, electrical connections are made.

However, in the above-mentioned conventional technology, an adhesive is used to fix the electronic element to the substrate, which makes wiring work cumbersome and inconvenient for automation. Furthermore, since it is not possible to paint the entire external surface of the completed electronic component, accidents such as caps coming off or deformation occur, resulting in unstable performance and poor connection reliability.

Historically, the manufacturing process has been complicated, and it is not possible to jump between the printed wiring on the board.

The present invention solves the above-mentioned problems and provides an electronic component that is most suitable for leadless design.It is possible to fix and connect to a printed circuit board at the same time by spot welding without using adhesives, thereby increasing the efficiency of connection work. In addition, in the completed product form, the entire outer surface is coated with an insulating coating to prevent peeling and deformation, resulting in stable quality and improved reliability. The purpose of the present invention is to obtain an electronic component that can be applied to functional components and is suitable for automation of manufacturing and connection work.

In order to achieve these objects, the present invention provides a set of external connection members having fixing parts that are spot welded during wiring, which are caulked to both ends of the electronic element, and then the entire outer surface except the legs is crimped. It is coated with insulation.

Embodiments of the present invention will be explained below with reference to the drawings.

(3) Figure 3 A to C'! Now, FIG. 4 is a side view showing the manufacturing process of the electronic component according to the present invention, and FIG. 4 is a side view of the completed electronic component connected to a printed circuit board. Examples include resistors, capacitors,
Diodes and the like are used, and their shapes are diverse, such as cylindrical, prismatic, rectangular, etc.

Reference numeral 9 denotes a pair of external connection members, and the external connection members 9 are formed by press punching a conductive metal plate. The shape of this external connection member 9 is shown in a plan view in FIG. 5 and a view taken in the direction of arrow 10 in FIG. As shown in FIG. 6, it has a mounting part 11 at one end which is caulked to the end of the electronic element 8.

The reason why we decided to caulk the mounting part 11 to the electronic element 8 in this way is that it can be adapted to electronic elements 8 of a wide variety of shapes, and that it is more electrically efficient than the conventional technology that uses a cap. This is because the connection is certain.

The lower surface of this mounting portion 11 is folded down to form a connecting portion (4) 12, and this connecting portion 12 is connected to a flat fixed portion 1.
It follows 3. As best shown in FIG. 5, the fixing portion 13 is wide and is spot-welded to the printed wiring 15 of the board 14.

Of course, this spot welding may be performed not only at one point but also at many points.

Reference numeral 16 indicates an insulating coating using oil or the like, and this insulating coating device 6 completely coats at least the mounting portion 11 of the electronic element 8 and the external connection member 9 caulked to both ends of the electronic element 8. The insulating coating device 6 protects and fixes the electronic element 8 and the caulked portion between the electronic element 8 and the external connection member 9.

What should be noted here is that, as shown in FIG. 4, the lower surface of the fixing part 13 of the external connection member 9 is formed lower than the lower surface of the insulating coating 6, and there is a step between the two. ,
This makes it possible to connect the printed wiring 15 on the board 14 by jumping an appropriate number of times.

As described above, the electronic component according to the present invention basically includes an electronic element and an external part having a mounting part caulked to the electronic element at one end and a wide fixing part to be spot welded at the other end. A connecting member, and an insulating coating that covers the electronic element and at least the mounting portion of the external connecting member, and there is a step between the lower surface of the fixing portion of the broken external connecting member and the lower surface of the insulating coating. It has been established.

This eliminates the need for adhesive when connecting the wires, thereby simplifying the connection work. Further, since the external connection portion can be fixed and connected to the printed circuit board at once by spot welding, the efficiency of the connection work can be dramatically increased.

Furthermore, since insulation coating can be applied to the entire outer surface of the completed product, product quality can be stabilized and reliability can be improved.

Moreover, since the external connection member is caulked to the electronic element, it can be used regardless of the shape or function of the electronic element.
It can be applied to a wide variety of things.

As a result, a leadless electronic component suitable for automation of manufacturing and connection work can be obtained.

[Brief explanation of the drawing]

Figures 1A to D are side views showing the manufacturing process of conventional leadless parts and sub-components; Figure 2 is a side view of the leadless electronic components shown in Figure 1 during wiring and connection; Figure 3 A to C are side views showing the manufacturing process of the leadless electronic component according to the present invention, FIG. 4 is a side view of the completed electronic component connected to a printed circuit board, and FIG. 5 is a side view of the completed electronic component. A plan view of the electronic component, FIG. 6, is a view taken in the direction of arrow 10 in FIG. 5. 8...Electronic element 9...External connection member 11...Mounting part 13...Fixing part 16...Insulating coating Figure 1 Figure 2'/! :) '/bFigure 3Figure 4Figure 5Figure 8

Claims (1)

[Scope of Claims] 1. An external connection member having an electronic element, a mounting part caulked to the electronic element at one end, and a wide fixing part to be spot welded at the other end; An electronic component characterized by having an insulating coating that covers a mounting portion of an external connection member. 2. Claim 1, characterized in that a step is provided between the lower surface of the fixed portion of the external connection member and the lower surface of the insulating coating.
Electronic components listed in section.