JPH046196Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electrical component suitable for applications such as printed circuit boards that require insertion of terminals in fixed positions.

In general, for electrical components to be incorporated into printed circuit boards, it is important that the lead terminals be mounted in fixed positions and that their dimensional accuracy be good.

If the lead terminal is a lead wire, some errors can be compensated for by the flexibility of the lead terminal itself, but Fast. In the case of hard metal terminals such as tabs, even the slightest deviation is unacceptable.

This idea was developed by Faston. This invention relates to a resin-sealed electrical component that uses tabs as lead terminals. In a general structure of a resin-filled capacitor, for example, a capacitor element is placed in a resin case and filled with resin, and a lead terminal is led out from the resin case.

At that time, the capacitor element is housed in a resin case with an internal volume larger than the dimensions of the element, which tends to cause the element to be biased or tilted, causing problems such as the lead terminal attached to the element not being set in the correct position. .

Various methods have been implemented so far to improve these drawbacks.

One method is to correct the position of the capacitor element by injecting a filler into the gap between the resin case and the capacitor element two or more times.

This inevitably requires manual labor, which is very disadvantageous in terms of time and man-hours, and is not suitable for mass production.

The next method proposed as suitable for mass production is Utility Model Publication No. 58-47693.

This proposal is effective when there is a certain degree of dimensional tolerance regarding the terminal position.

However, it has the disadvantage that it cannot be used structurally in applications requiring stricter dimensional accuracy.

These are that the lead terminal and the terminal mounting plate for positioning are joined by soldering, and that a flexible object such as a capacitor element is used as a dimensional standard. Joining two objects involves more problems in terms of dimensional accuracy than joining one object.

Furthermore, the finished dimensions of capacitor elements may vary to some extent due to the winding process and metallicon process.

Even in the process of soldering lead terminals to the metallized surface of a capacitor element, variations occur in the dimensions between the two terminals.

The present invention was made in order to eliminate the various drawbacks of the above-mentioned Japanese Utility Model Publication No. 58-47693.

Next, embodiments of the present invention will be described based on the drawings.

FIGS. 1A and 1B are cross-sectional views when the connecting terminal 1 and capacitor element 5 of the present invention are put into a resin case 6 and filled with epoxy resin 7.

In FIG. 1B, both wings 3 of the two lead-out terminals 1
are in close contact with the inner wall of the case at both ends of the resin case 6, respectively.

Since the width dimension C of the lead-out terminal is constant, the two faston. The distance D between the tabs is determined.

In FIG. 1A, the dimension B between the wings 3 of the lead-out terminal 1 is the same as the inside dimension of the resin case 6, so that the fastener. Tab 2 no longer tilts.

One end of both wings 3 of the pull-out terminal 1 is in contact with the bottom of the resin case 6. The dimension in which the tab 2 protrudes from the upper surface of the epoxy resin 7 is constant.

In FIG. 1B, the capacitor element 5 is connected to the internal connection lead part 4 of the outgoing terminal 1, and since some variations in the length of the element are absorbed by the flexibility of the lead part 4, the outgoing terminal 1 is fixed. The position remains unchanged.

Since the lead-out terminal 1 of the present invention is composed of one object, it has good dimensional accuracy and high working efficiency. It also has a function that can simultaneously solve the three elements of fixed position setting: height, terminal spacing, and tilt. As described above, in order to meet the increasingly strict dimensional accuracy requirements for electrical components for printed circuit boards, this invention improves conventional products without increasing the price and realizes a resin-encapsulated electrical component with high terminal position and dimensional precision. It is something.

[Brief explanation of the drawing]

Figure 1 A and B show the lead-out terminal 1 and the capacitor element 5.
FIG. 2 is a cross-sectional view when the connected parts are put into a resin case 6 and filled with epoxy resin 7. 1...Output terminal, 2...Output terminal Faston. Tab, 3...Both wings of the pull-out terminal, 4...Lead part for internal wiring of the pull-out terminal, 5...Capacitor element, 6...Resin case, 7...Filled epoxy resin, A...Height dimension of the pull-out terminal , B... Dimension between both wings of the pull-out terminal, C... Width dimension of the pull-out terminal, D...
...Two fastons. Dimension between tabs.

Claims (1)

[Scope of utility model registration request] For resin-filled electrical parts, the distance between the wings of the lead-out terminal is adjusted to the inner width of the resin case, and both wings are tightly fixed to the end and bottom surfaces of the resin case. An electrical component enclosed in a resin case with the tab height, terminal spacing, and inclination set, and connected to the capacitor element using a flexible internal wiring lead.