JPH0718436U - Series capacitor - Google Patents

Abstract

(57) [Summary] [Objective] To obtain a 2-series capacitor that is small in size, low in material cost, and large in permissible current. [Structure] The two foil electrodes 5 ₁ and 5 ₂ are made of plastic films 2 and 4 so that the opposite ends do not overlap each other and the other ends do not overlap.
₁ to 4 ₃ plastic films ₂ and 4 so as to overlap with a part of one metallized electrode 3 via different plastic films ₂ and 4 so as to project from the insulation in the width direction.
Disposed to _{1-4 3} in the width direction, and connecting the respective lead terminals 7 and 7 the projecting portion 6 from the two foil electrodes 5 _1, 5 ₂ of the plastic film 2, 4 _{1-4 3.}

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a series type capacitor used in a television receiver, a fluorescent lamp inverter, and the like.

[0002]

[Prior art]

Conventionally, as shown in FIG. 4, two foil electrodes a ₂ and a ₃ are arranged in the length direction of a foil electrode a ₁ via a dielectric film b so as to partially overlap the foil electrode a _1. , The lead electrodes c ₁ and c ₂ are welded to the foil electrodes a ₂ and a ₃ , respectively, and pulled out in the width direction of the dielectric film b, and the dielectric film b is wound in the length direction to form a two-series plastic film capacitor. As shown in FIG. 5, a foil or _two foil electrodes a ₂ and a 2 are formed in the width direction via a dielectric film b so as to overlap a part of the metallized electrode a ₁ of the metallized film A. ₃ , the metallized film A and the dielectric film b are wound in the lengthwise direction, and the two foil electrodes a ₂ and a ₃ project from the edges of the dielectric film b in the width direction. The lead terminals c ₁ and c ₂ are welded to each other, or as shown in FIG. ₁ a sheet of foil electrodes a ₂ via the dielectric film b ₁ so as to overlap a part, further dielectric film b _2, b ₃ and another foil electrode a ₃ via disposed respectively, foils drawer in the width direction of the dielectric film b _1, b _2, b ₃ are welded respectively lead terminal c _1, c ₂ on the main surface of the electrode a _2, a _3, a dielectric film b _1, b _2, b ₃ , B ₄ wound in the length direction is known.

[0003]

[Problems to be solved by the device]

In the conventional structure shown in FIG. 4, when the dielectric film b is wound, the foil electrodes a ₁ , a ₂ and a ₃ are cut to a predetermined length and are then wound so as to be interposed between the dielectric films. Since it is necessary to stop or restart the rotation, work efficiency is poor, and the resistance is large because the lead terminals c ₁ and c ₂ are connected in linear contact with the foil electrodes a ₁ and a _2. The one shown in FIG. 5 has a better operating efficiency than the one shown in FIG. 4 because it has a small allowable current, but the two foil electrodes a ₂ and a ₃ must be separated according to the insulation strength. Since there is no dielectric film, the width of the dielectric film becomes wider and the material cost becomes higher, and when it is mounted on the printed board, the occupied area becomes large. Also, the one shown in FIG. 6 occupies a smaller area when mounted on a printed circuit board, but like the one shown in FIG. 4, the lead terminals are connected in linear contact with the foil electrodes a ₁ and a _2. Therefore, it has a drawback that the resistance is large and the allowable current is small.

An object of the present invention is to provide a 2-series capacitor that is small in size, low in material cost, and has a large allowable current.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides two foil electrodes or metallization electrodes in the width direction via a dielectric film so as to overlap a part of one foil electrode or metallization electrode. In a series type capacitor arranged and wound in the length direction of a dielectric film, one and the other of the two foil electrodes or metallized electrodes are arranged such that their opposite ends do not overlap each other and their other ends are dielectric. The dielectric films of the two foil electrodes or metallized electrodes are arranged on both end faces of the wound body so that they are arranged and wound so as to project from the edges in the width direction of the body film. The metal layer is provided in contact with the protruding portion from the lead layer, and the lead terminals are connected to the metal layer.

[0006]

[Action]

 According to the above configuration of the present invention, one foil electrode or metallized electrode and the two foil electrodes or metallized electrodes facing it are both substantially the same length as the dielectric film. When the film is wound on top of the foil electrode or metallized electrode, it is not necessary to stop and restart the winding in order to cut two foil electrodes or metallized electrodes in the middle of the winding. Wind at speed. Even when connecting the lead terminal to the foil electrode or metallized electrode, it is necessary to stop winding in the middle because it is connected to the foil electrode or metallized electrode protruding from the widthwise edge of the dielectric film after winding. Absent. Also, since the lead terminals are connected to the metal layers on both end surfaces of the wound body that are connected to the edges of the foil electrode or metallized electrode, the contact surface with the metal layer becomes wider and the resistance decreases, resulting in a temperature drop Does not rise and the allowable current increases.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

1 and 2 show an embodiment of the present invention.

In the figure, 1 is a metallized film in which a metallized electrode 3 is applied to the plastic film 2 by metal deposition, leaving a part of both widthwise edges, 4 ₁ , 4 ₂ , 4 ₃ both plastic film, 5 _1, 5 _2, the same length foil electrode metallization electrode 3 of the width is a narrow metalized film 1.

As shown in the drawing, the plastic film 4 ₃ , the foil electrode 5 ₂ , the plastic film 4 ₂ , the metallized film 1, the foil electrode 5 ₁ and the plastic film 4 ₁ and the foil electrode 5 ₁ are the plastic films 2, 4 ₁ , 4 _2, protrudes from 4 ₃ in the width direction of the end edge, the foil electrodes 5 ₂ superposed to protrude from the plastic film 2 and 4 _1, 4 _2, 4 ₃ the width direction of the other edge of Komaki Turn. The foil electrodes 5 ₁ and 5 ₂ have a width such that their opposite edges do not overlap each other in the wound state. After the winding, as shown in FIG. 2, the end faces of the winding body 8, the plastic film 4 _1, 4 _2, 4 ₃ solder prime to contact from the width direction of the edge on the protrusion 6 protruding or The metal layer 9 is formed by metallikon, and the lead terminals 7, 7 are connected to the metal layer 9 by, for example, resistance welding.

FIG. 3 shows another embodiment of the present invention.

[0012] This example, except the plastic film 4 ₁ is absent, are the same embodiment as structure shown in Figure 1.

Table 1 shows the relationship between the dimensions and the DC breakdown voltage of the five samples A, B, C, D and E of this example and the conventional example shown in FIG.

[0014]

[Table 1]

In Table 1, when comparing A to E of the present invention and the conventional example, when the DC breakdown voltages of both are almost the same (10.0 to 12.0 KV, 11 to 13 KV), the foil electrodes 5 ₁ and 5 are interval Mc of ₂ or a ₂ and a ₃ are, whereas prior art is 5 m / m, the present invention can be as short as 1.5 m / m, also metallized electrode 3 or a ₁ And the length Ms between each edge of the plastic film 2 or b is 1.5 m / m as compared with 2.75 m / m on one side in the conventional example, and as a result, the plastic film 2, 4 ₂ The width of 4 ₃ or b was 21.5 m / m in the conventional example, but was narrowed to 15 m / m.

[0016]

[Effect of device]

 Since the present invention is configured as described above, it has advantages that it is small in size and the material cost is low, and the allowable area is large because the connection area between the lead terminal and the electrode is wide.

[Brief description of drawings]

1A and 1B are a developed front view and a developed side view of an embodiment of the present invention.

FIG. 2 is a front view of an embodiment of the present invention.

3A and 3B are a developed front view and a developed side view of another embodiment of the present invention.

4A and 4B are a developed front view and a developed side view of a first example of a conventional series-type capacitor.

5A and 5B are a developed front view and a developed side view of a second example of a conventional series type capacitor.

6 (A) and (B) are a developed front view and a developed side view of a third example of a conventional series-type capacitor.

[Explanation of symbols]

1 Metallized Film 2 Plastic Film 3 Metallized Electrode 4 ₁ , 4 ₂ , 4 ₃ Plastic Film 5 ₁ , 5 ₂ Foil Electrode 6 Projection 7 Lead Wire 8 Winding Body 9 Metal Layer

Claims (1)

[Scope of utility model registration request] 1. A length of a dielectric film in which two foil electrodes or metallized electrodes are arranged in the width direction through a dielectric film so as to overlap a part of one foil electrode or metallized electrode. In a series type capacitor wound in one direction, one and the other of the two foil electrodes or the metallized electrodes are projected so that their opposite ends do not overlap each other and the other ends protrude from the widthwise edge of the dielectric film. So that they are arranged and wound via mutually different dielectric films, and the metal layer is contacted with the protruding portions of the two foil electrodes or the metallized electrodes from the dielectric film on both end faces of the wound body. And a lead terminal connected to each of the metal layers, a series type capacitor.