JPH0546264Y2

JPH0546264Y2 -

Info

Publication number: JPH0546264Y2
Application number: JP8909088U
Authority: JP
Priority date: 1988-07-04
Filing date: 1988-07-04
Publication date: 1993-12-03
Anticipated expiration: 2003-07-04
Also published as: JPH0211317U

Description

[Brief explanation of the drawing]

第１図は本考案によるNHコンデンサの一実施
例を示す図であり、Ａは正面図、Ｂは側面図、Ｃ
は絶縁板を示す平面図、第２図は従来のNHコン
デンサを示す図であり、Ａは正面図、Ｂは側面
図、Ｃはスリーブを示す斜視図である。１……素子、２……ケース、３……上蓋、４…
…端子、５……リード箔、６……スリーブ、７…
…絶縁板、８……折曲げ部、９……素子包囲紙。 FIG. 1 shows an embodiment of the NH capacitor according to the present invention, where A is a front view, B is a side view, and C is a side view.
2 is a plan view showing an insulating plate, FIG. 2 is a diagram showing a conventional NH capacitor, A is a front view, B is a side view, and C is a perspective view showing a sleeve. 1...Element, 2...Case, 3...Top lid, 4...
...Terminal, 5...Lead foil, 6...Sleeve, 7...
...Insulating plate, 8...Bending portion, 9...Element surrounding paper.

Claims

[Scope of Claim for Utility Model Registration] [Field of Industrial Application] The present invention relates to an NH capacitor, and particularly to a technology for improving the insulation structure of its lead foil portion. [Conventional technology] NH (non-healing) capacitors are made by stacking and winding a sheet-like dielectric material and electrode foil to form an element, which is housed in a case, and then the electrodes of the element are wrapped around lead foil. It is connected to the terminal attached to the top cover of the case via the terminal. The insulation structure of the lead foil of such an NH capacitor is generally achieved by wrapping the lead foil with a sleeve. FIG. 2 shows the insulation structure of such an NH capacitor. In FIGS. 2A and 2B, an element 1 formed by overlapping and winding a sheet-like dielectric material and an electrode foil is shown in a case 2. A pair of terminals 4 are attached to the top cover 3 of the case 2. A pair of lead foils 5 are drawn out from the upper surface of the element 1, and each lead foil 5 is connected to a corresponding terminal 4 of the upper lid 3, respectively. Further, in order to insulate the lead foil 5 from the case 2, a sleeve 6 whose length is several mm shorter than the length of the lead foil 5 is fitted and covered, as shown in FIG. 2C. Connection between the lead foil 5 and the terminal 4 is performed by soldering with the sleeve 6 covered. In addition,
Reference numeral 9 denotes an element surrounding paper made of pressboard or the like, which surrounds the periphery and bottom of the element 1 and insulates between the element 1 and the case 2. By the way, in the NH capacitor having the above structure, when the sleeve 6 is wrapped around the lead foil 5 and the lead foil 5 and the sleeve 6 are bent together, the materials of the lead foil 5 and the sleeve 6 are different, and the sleeve 6 is made of different materials. Since the sleeve 6 is hard, an unreasonable force is applied to the flexible lead foil 5, and the lead foil 5 may be displaced from its normal position. Due to this deviation,
There is a drawback that excessive force is applied to the sheet-like dielectric material forming the element 1, and this dielectric material is damaged, resulting in defects in insulation and voltage resistance. In addition, since the sleeve 6 is not flexible, the sleeve 6 may be damaged by bending, which may cause defects in the insulation and voltage resistance between the exposed lead foil 5 and the case 2. There are also drawbacks that arise. Further, when the tip of the lead foil 5 covered with the sleeve 6 is soldered to the terminal 4, the sleeve 6 may be burnt due to the high temperature, or sleeve scraps may be generated. This sleeve debris also has the disadvantage of causing defects in the insulation and charging properties between the terminals 4 and the case 2. On the other hand, in terms of workability, it is difficult to cover the lead foil 5 with the sleeve 6 and to solder the lead foil 5 covered with the sleeve 6 to the terminal 4, resulting in poor workability. [Problems to be solved by the invention] As explained above, conventional NH capacitors suffer from damage to the dielectric due to shearing of the lead foil, damage to the sleeve, and sleeve scraps when bending the lead foil or soldering the lead foil. This method has disadvantages such as poor insulation and voltage resistance due to such factors, and poor workability. The present invention was proposed to solve the above-mentioned drawbacks, and the purpose is to improve the insulation structure of the lead foil of the element to prevent defects in insulation and voltage resistance. It is an object of the present invention to provide an excellent NH capacitor that can prevent this and improve work efficiency by simplifying the insulation structure. [Means for Solving the Problems] The NH capacitor of the present invention has a pair of lead foils at the intermediate part in the length direction on one side of the lead foils, which is longer than the dimension between the lead foils and is bendable in the length direction of the lead foils. It is characterized in that an insulating plate is inserted and the lead foil is bent in the length direction along the bending surface of the insulating plate. [Operation] In the present invention having the above configuration,
The lead foil can be easily bent due to the flexibility of the lead foil itself, using the pressing force of the bent portion of the insulating plate as a bending moment. In this case, since no excessive force is applied to the lead foil, there is no damage to the dielectric material due to displacement of the lead foil, and since no sleeve is used, there is no damage to the sleeve or generation of sleeve scraps. Therefore, defects in insulation and voltage resistance can be prevented. On the other hand, since the structure is simple, just inserting an insulating plate, it has the advantage of improving work efficiency. [Example] Hereinafter, an example of the NH capacitor according to the present invention will be described in detail with reference to FIG.
Note that the same parts as those in the prior art shown in FIG. 2 are given the same reference numerals, and their explanation will be omitted. As shown in FIGS. 1A and 1B, in this embodiment, a pair of lead foils 5 are drawn out on the top surface of the element 1.
An insulating plate 7, which is longer than the distance between the lead foils 5, is inserted in a bent state at the intermediate portion in the length direction on one side of the lead foil 5. Here, as shown in FIG.
It is bent at. With the insulating plate 7 inserted, the upper cover 3 is pressed from above, the lead foil 5 is bent along the bending surface of the insulating plate 7, and assembled by known means. In addition, 9 is a concavely bent shape and is an element surrounding paper arranged on the front, bottom, and back of the fold of the insulating plate 7, so that even if the lead foil 5 is bent out of alignment and approaches the inner surface of the case 2, ,
This prevents contact with the case 2, prevents insulation and voltage withstand defects, and facilitates insertion of the element 1 into the case 2. According to the NH capacitor of this embodiment having the above-described structure, the lead foil 5 is pressed at its center by the bent portion of the insulating plate 7, and is easily bent using this as a moment. In this case, the lead foil 5
can escape to the side without the insulating plate 7, so unlike the conventional technology using a sleeve, the lead foil 5
No excessive force is applied to the element 1 that would cause it to shift. Therefore, there is no problem that the dielectric material is damaged due to the displacement of the lead foil 5, and there is no fear of poor insulation or voltage resistance caused by this. Furthermore, since no sleeve is used, there is no damage to the sleeve or generation of sleeve scraps, and there are no defects in insulation or voltage resistance caused by these. On the other hand, regarding workability, in the past, the lead foil 5 was covered with the sleeve 6.
In contrast, in this embodiment, the insulating plate 7 is simply inserted after the lead foil 5 is soldered to the terminal 4 of the top cover 3, which greatly improves work efficiency. has improved. The table below shows the NH according to this example shown in Figure 1.
The characteristics of the capacitor and the conventional NH capacitor shown in Fig. 2 are compared. Note that the number of samples is 1000 for both the present invention and the conventional example. [Table] As is clear from this table, while the conventional example shows values of 1 to 3% for both the insulation failure rate and the withstand voltage failure rate, the present invention has none of them. Also,
Regarding work efficiency, this invention also improves work efficiency by 2 times compared to conventional methods.
It has been proven to be twice as effective. In addition, in this invention, the size, shape, material, etc. of the insulating plate are as long as they can be bent without fear of damage.
Freely selectable. [Effects of the invention] As explained above, according to the invention, the simple structure of inserting an insulating plate on one side of the lead foil has higher insulation and voltage resistance than conventional ones, and is easy to operate. We can provide superior NH capacitors that are also effective in improving efficiency.