JPH0442905Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a capacitor in which plate-shaped leads are connected to both winding ends of a dielectric film.

[Conventional technology]

As shown in FIG. 5, electrodes 2 and 3 are formed at both winding ends of the metallized dielectric film winding 1 by metal spraying, and L-shaped plate electrode leads 4 and 5 are formed. End plates 6 and 7 bent into
A capacitor formed by welding these to electrodes 2 and 3, respectively, is shown in FIG. 1 of Japanese Patent Laid-Open Publication No. 60-220921. Note that 9 is a molded resin exterior.

The electrode leads 4 and 5 of the capacitor described above are attached to the element 8 as shown in FIG. That is, many pairs of electrode leads 4 and 5 are formed by punching out a long metal strip 10, and end plates 6 and 7 are provided at opposite ends of each pair of electrode leads.
is formed by bending. Element 8 is inserted between end plates 6 and 7, and electrodes 2 and 3 are respectively connected to end plate 6.
and welded to 7. Next, the resin sheath 9 is molded as shown in FIG. 5, and finally the electrode leads 4 and 5 are separated from the metal strip 10.

[Problem that the invention attempts to solve]

The distance L between the end plates 6 and 7 formed adjacent to the metal strip 10 is constant. However, the length Lc of element 8
There is considerable variation. Therefore, when the length Lc of the element 8 is large, the end plates 6 and 7 are forced
pushed in between. Furthermore, when the length Lc of the element 8 is short, the end plates 6 and 7 are pulled outward in the direction of the element 8 during welding after the welding is completed. In either case, excessive force is applied to the electrodes 2 and 3, which impairs the characteristics of the capacitor.
Further, when the electrode lead is soldered to the circuit, the heat is easily transferred to the element 8.

[Means for solving problems]

The film capacitor according to this invention consists of a capacitor element having metal electrodes provided on both end faces of a wound body of a dielectric film and a thin conductive layer, and a pair of leads. Each lead extends in a direction substantially parallel to the winding axis of the element, and has an end plate bent into an L shape at one end, and a tongue piece is provided on this end plate by punching. , the tongues are continuous with the end plate at their free ends, and these tongues are welded to the metal electrodes of the element.

[Effect]

Similar to the prior art example described above, the leads of the capacitor according to this invention are formed in multiple pairs on a metal strip.
However, even if there is considerable variation in the length of the capacitor element due to the elasticity of the end plate and the elasticity of the tongue piece, this can be absorbed by the elastic bending of the end plate and the tongue piece. This can prevent excessive force from being applied to the

Furthermore, since the tongue piece is punched out from the end plate, it does not get in the way of the welding electrode when welding the tongue piece to the electrode of the capacitor element. Furthermore, since the heat transfer path from the leads to the electrodes of the capacitor element becomes longer, the heat is less likely to be transferred to the capacitor element during soldering.

〔Example〕

In FIG. 1, a capacitor element 8 is formed by providing electrodes 2 and 3 by metal spraying on both end surfaces of a wound material 1 of a metallized dielectric film.

The leads 11 and 12 extend substantially parallel to the winding axis of the wound article 1, and end plates 13 and 14 bent into an L-shape are formed at each end of the leads 11 and 12. Thus tongues 15 and 16 are formed.
The tongue pieces 15 and 16 have narrow continuous parts 17 and 1
8 (see FIG. 2) to the free ends of the end plates 13 and 14, respectively. Furthermore, claws 19, 19 and 20, 20 which are bent back in a direction parallel to the winding axis are formed on the free end side of each end plate. 9 is a molded resin exterior.

When manufacturing the above capacitor, lead 1
1 and 12 are punched out from the metal strip 21 in a large number of pairs, as shown in FIG. 2, so as to be continuous. As shown in FIG. 3, the distance between the proximal ends of the end plates 13 and 14 at this time is La,
Assuming that the distance between the free ends of is Lb, if the length Lc of the capacitor element 8 is between La and Lb, the capacitor element 8 can be moved as shown in FIG. It can be inserted between 15 and 16. The claws 19, 19 and 20, 20 contact the side surfaces of the capacitor element 8 at this time and hold the element 8 until welding is completed.

Welding work is carried out using the welding electrode 2 as shown in Figure 4.
1 and 22 are pressed against the tongue pieces 15 and 16, respectively. Since the tongue pieces 15 and 16 are punched from the end plates 13 and 14, respectively, the welding electrode is pressed against the end plates 13 and 14. The tongues 15 and 16 can be reached without being obstructed by 14.

[Effect of idea]

As is clear from the above explanation, when using this invention, multiple pairs of leads are continuously punched out from a metal body for mass production, a capacitor element is inserted between each pair, and the capacitor element is welded to the leads. When this manufacturing method is adopted, it is possible to weld the capacitor element to the lead without applying excessive force to the capacitor element, thereby contributing to improving the quality of the manufactured capacitor. Furthermore, when the leads are soldered to a circuit or the like, since the heat transfer distance is long, it also has the advantage that heat is difficult to transfer to the capacitor element.

[Brief explanation of the drawing]

FIG. 1 is a front view and side view of an embodiment of this invention, FIG. 2 is a sketch of the lead in the above embodiment during manufacture, and FIG. 3 is a front view of the lead shown in FIG.
FIG. 4 is a front view of the capacitor element inserted between the leads, FIG. 5 is a front view of a conventional capacitor, and FIG. 6 is a sketch of the leads during manufacture of the capacitor shown in FIG. 1... Winding material, 2 and 3... Metal electrode, 8...
Capacitor element, 11 and 12...Lead, 13
and 14... end plate, 15 and 16... tongue piece.

Claims (1)

[Scope of utility model registration request] A capacitor element in which metal electrodes are provided on both end faces of a winding of a dielectric film and a thin conductor layer, respectively;
A pair of leads extending in a direction substantially parallel to the winding axis of this element, an end plate each bent into an L-shape from one end of these leads, and a A film capacitor consisting of tongues which are continuous at their free ends and are each welded to said metal electrode.