JPH02247933A - Electronic parts - Google Patents

Abstract

PURPOSE:To stabilize the effective dimension of a fuse and its fusibility and improve an assembly yield by setting the effective dimension of fuse material according to the insulation processing dimensions applied to an outside conducting lead member. CONSTITUTION:An outside conducting lead member 3 at the side of cathode is insulated in advance to form an insulated portion 2, and the whole surface of a cathode outlet layer of an element 4 is made such that the whole surface is applied to the lead member 3 bent thereafter. On the other hand, the anode outlet lead 8 of the element 4 is connected to the outside conducting lead 5 at the anode side. Then, the element 4 is fixed along the outside conducting lead 3 at the cathode side, so that it is rarely that the element 4 is connected warped. Next, one end of a fuse material 1 is electrically and mechanically connected to the cathode outlet layer portion of the element 4 The other end of the fuse material 1 is arranged such that it goes across the insulated portion 2 in the direction opposed to the element contact surface of the bent outside conducting lead 3 at the side of cathode, and one end of the fuse material 1 is electrically and mechanically connected to a conductive portion.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF APPLICATION OF DOUBAI The present invention relates to an electronic component having functions of preventing dielectric breakdown and protecting against over-rated current and voltage.

BACKGROUND TECHNOLOGY Generally, an electronic component equipped with this type of fuse function has an anti-oxidant layer 21i on the surface of an element 40, as shown in FIG.
Structure or element to be formed and external lead member 31
A structure is adopted in which the effective dimensions of the fuse are secured by leaving a gap between the fuse and the fuse.

Problems to be Solved by the Invention As shown in Figures 2, B, and GK, when the connection dimensions of the element 4 and the length of b' vary, and when the insulation treatment part is applied to the element 4 in 1. If the dimensions Q, o I of fuse 1 vary, shadow 1 will also appear on the effective dimensions &, &', tI# of fuse 1. From this, shadow 1 will also appear in the variations in fuse blowing operation. It was meant to be given.

The same figure shows the condition as designed.
The connection position of fiBam child 4 is the element intestinal pole extraction lead 80
Since the dimension b' has become longer, it approaches the cathode side external lead-out lead 3, indicating that the fuse effective dimension a' has become shorter. Furthermore, in C of the same figure, the dimension O' of the isolated rock-treated part 2 is shortened,
This shows that a shadow 1 appears on the fuse effective dimension IL''.

It seems that the structure of conventional electronic components is as follows:
Due to the accuracy, dimensions, and changes in quality, the effective dimensional length of the t-elephant festival fuse is considerably affected, and it is possible that the necessary bolt size cannot be secured, which may affect the fusing performance of the fuse. Against.

In addition to the increased variation, the installation of raw ah fuses also had a significant impact on yield.

Therefore, one aspect of the present invention is a relatively simple structural improvement.

The objective is to stabilize the effective dimensions of the fuse, stabilize the fusing performance, and improve the assembly yield, thereby providing a high-quality electronic component with a built-in fuse.

Means for Solving the Problems The electronic component of the present invention has the required length of the floor for the effective dimension of the fuse on a part of the fuse reading surface of the external lead member.
! , so that it can be obtained by applying Ryu'l1k. Furthermore, Part 8 @ Iri is that the element charge extracting part and the external lead member are not in contact! By positioning the element itself along the 8-position processing surface of the external lead member, it is possible to eliminate the element's wobbling under L and to achieve stable element connection. be.

The required size of the operating fuse bolt base is determined by the insulation provided on the fuse reading surface of the external lead member, so the fuse is too short and the operation is similar to that of a temperature-changing fuse, which depends on the effect of element heat generation. It is not a case of large variations in operation,
As a current fuse that can be operated by the heat generated by the fuse itself, the bolt operating dimension is maintained at 1, and variations in basic operation such as fusing performance are reduced.

Embodiment 1 An electronic component according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing the configuration of an electronic component according to an embodiment of the present invention.

In the electronic component of this example, the cathode side external lead part 3 is insulated in advance to form the insulation part 2, and then the lead part fi13 is bent as shown in Figure 1.
Next, apply 40 elements to a groove along which the surface of the return layer is paralleled. On the other hand, the hot water ball drawer lead 8 of the element 4 and the positive 11 [1
1 Connect to the external lead 5. Since the matsuri Takako 4 is fixed to the Ii fin external lead 3, the possibility that the element 4 is connected in a distorted manner is reduced.

Next, one end of the fuse material 1 is connected electrically and mechanically to the unipolar lead-out layer portion of the element 4. The other end of the fuse material 1 is placed so as to go beyond the part of the bent cathode side external lead 3 on which the cliff topography 2 is applied in the opposite direction to the element contact surface. Connect electrically and mechanically.

An undercoat 6 is applied to the assembly assembled as described above so as to cover the whole, and an exterior 7 is formed to form the electronic component of this embodiment.

In this embodiment, since the insulation treatment 2 is performed and the dimensions are accurate with respect to the cathode side external lead member 3, the fuse contact tcJ! The positioning of the fuse member 1 can be easily performed, and the fuse member 4 can be connected with high reliability without seriously injuring the fuse member 4.

In view of the effects of the invention, the present invention provides an electronic component with a built-in fuse.
When the peak rises, the fuse blowing performance is reduced (lackiness).
Moreover, it has an extremely practical effect in improving the stability of the fuse connection and improving the walking distance.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of an electronic component in one super-winding example of the present invention;
Figure 2, J3. a is a sectional view of a conventional electronic component. DESCRIPTION OF SYMBOLS 1... Fuse material, 2... Absolutely treated portion, 3... Cathode side external lead member, 4...
...Element, 6...Positive side external lead member, 6...Undercoat part, 7...Exterior = 8
...Element anode lead.

Claims (2)

[Claims] (1) At least two extraction electrodes drawn out from an electronic component element, at least one of the at least two extraction electrodes is connected to an external lead member via a fuse material, and the effective size of the fuse material An electronic component characterized in that the electronic component is configured to be set by an insulation treatment dimension applied to an external lead member. (2) The unconnected contact portions of the extraction electrode and the external lead member are brought into contact through insulation treatment, and a plate-shaped or wire-shaped fuse material is connected between the element electrode extraction portion and the external lead member for electrical connection. 2. The electronic component according to claim 1, wherein the electronic component is configured to be interposed in series.