JPS5937850B2 - Manufacturing method of composite capacitor - Google Patents

Description

[Detailed Description of the Invention] The present invention is a small and compact composite capacitor whose element body is a metallized plastic film capacitor, and more specifically, a plurality of metalized plastic film capacitors having one terminal in common. The present invention relates to a method for manufacturing a composite capacitor.

Conventionally, in order to manufacture a so-called composite capacitor by integrating a plurality of capacitors, the method of manufacturing each capacitor separately and connecting them has been used, but the method of the present invention is different from the conventional method. It is possible to obtain a smaller and more compact composite capacitor than that obtained by the method described above, and the number of parts required for manufacture can be relatively small.

The present invention will be explained in detail below with reference to Examples.

1 to 5 describe the first embodiment.

Figure 1a is a plan view of an element (hereinafter simply referred to as the rolled body) obtained by pressing a rolled body of metallized plastic film into a flat shape, and b is also a front view.
and 2/ are both end faces of the wound body 1, and each winding layer is exposed.

FIG. 2a is a plan view of a structure in which metal sprayed portions are formed on both end faces 2.degree. 2' of the wound body 10, and FIG. 2b is a front view of the same.

In the figure, 3 and 3' are metal sprayed parts.

FIG. 3a shows a metal sprayed part 3 on the rolled body 1 shown in FIG.
A plan view in which the cut 4 is formed from above, and b is a front view as well.

The depth of the notch 4 will be explained with reference to FIG.

FIG. 4 is a partial sectional view taken along the notch 4, and the lateral direction of the figure is enlarged for easy understanding.

In the figure, 10 and 10' are plastic films,
11.11' is a plastic film i o , i
As is well known, the metal sprayed parts 3 and 3' are the vapor-deposited metal 1 which forms the electrode.
1.11' electrically connected.

The depth of the cut 4 must be greater than the distance AB in FIG.

On the other hand, if the depth of the notch 4 is deeper than AD, the mechanical strength may become weaker depending on the case.

After forming such a notch 4, lead wires T1. By connecting T2 and T3, two capacitors C□ and C2 are obtained as shown in the connection diagram of FIG.

The two capacitors thus obtained have one terminal in common, and are provided with a suitable exterior as required to obtain a finished product.

In this case, terminal T3 is not used and terminal T1. If only T2 is used, C1 and 02 are connected in series, and a capacitor suitable for high voltage can be obtained.

In this embodiment, the notch 4 is created after the metal sprayed parts 3, 3' are created on both end faces 2, 2' of the wound body 10, but on the contrary, the notch 4 is created and then the metal sprayed parts 3, 3' are created. Thermal sprayed portions 3, 3' may also be formed.

Next, FIGS. 6a and 6b are a plan view and a front view showing a second embodiment of the present invention.

This is done by pressing a roll of metallized plastic film around a core with a large diameter into a flat shape, forming metal sprayed parts 3, 3' on both end faces 2.2I of the roll, and making many cuts. 4, 4... are formed.

It will be easily understood that by forming a large number of notches 4, 4, . . . as shown in the figure, a large number of capacitors having one terminal in common can be obtained.

Further, FIG. 7 will be described as a third embodiment of the present invention.

FIG. 7 shows metal sprayed parts 3 on both end faces of the cylindrical wound body 1.
3' is formed, and cuts 4 and 4' are formed therein in a plan view.

12 is a winding core hole from which the winding core is removed when the winding body 1 is wound.

The wound body 1 is divided into four parts to obtain four capacitors having one terminal in common.

FIG. 8 shows a fourth embodiment in which cuts are made diagonally on the end face.

As described above, the detailed explanation by way of example shows that the method of the present invention makes it possible to obtain a small and compact composite capacitor with a relatively small number of man-hours by making cuts at right angles to the end face and in any direction on the end face. It is clear that the present invention is industrially useful.

[Brief explanation of drawings]

1 to 5 are drawings showing the first embodiment, FIG. 6 is a drawing showing the second embodiment, and FIGS. 7 and 8 are drawings showing the third embodiment. It is a drawing showing a fourth example. 1... Winding body, 2, 2'... End face of winding body, 3゜3I... Metal sprayed part, 4, 4'...
...Notch, 10.10'...Plastic film, 11°11/...Vapour-deposited metal, 1
2... Winding core hole, T1゜T2, T3...
・Lead wire, C1, C2...Capacitor.

Claims (1)

[Claims] 1. Constructing a wound body by winding a plastic film on which a metal is vapor-deposited, forming a metal sprayed part on both end faces of the wound body where the wound layer is exposed, and forming the above-mentioned end face from one of the end faces. to the position of the non-deposited part of the metallized film,
A method for manufacturing a composite capacitor, which comprises forming a notch perpendicularly and in an arbitrary direction on the end face, and forming a plurality of capacitors having the other end face as a common terminal.