JPH0437563B2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a case for a capacitor.

(Prior Art) An MP capacitor, for example, has a structure in which a capacitor element is housed in a metal case and sealed. As shown in FIG. 4, the lid 20 used for sealing is made by passing a rivet 21 through the lid 20, connecting a terminal 22 to the tip thereof, applying the collar 23 of the rivet 21 to an insulating paper 24, and then inserting the insulating paper 24. It has a structure in which it is fixed to the lid 20 via a rubber packing 25.

(Problem to be solved by the invention) However, the conventional lid has the disadvantage that when rotational force is applied to the terminal, it easily rotates along with the rivet, causing the lead wire connected to the rivet to twist and break. .

SUMMARY OF THE INVENTION An object of the present invention is to provide a capacitor case that can improve the above-mentioned drawbacks, prevent rotation of terminals, and prevent disconnection of lead wires.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention provides a capacitor case that has a built-in capacitor element and can be hermetically sealed. A capacitor comprising: a terminal connected to the tip of the rivet; and an insulating plate having a recess or hole into which the protrusion of the flange is inserted, the insulating plate passing through the rivet and being fixed to the lid. This provides a case for use.

Further, the present invention provides a capacitor case according to claim 1, characterized in that the case has an insulating plate having partition walls between the holes through which the rivets pass.

(Function) In the rivet of the present invention, a protrusion is provided inside the flange, and a recess or hole is provided in the insulating plate, and the protrusion of the flange is inserted into the recess or hole. The insulating plate is fixed to the lid via rubber packing or the like, thus preventing the rivets and terminals from rotating.

(Examples) The present invention will be described below based on illustrated examples.

In FIG. 1, reference numeral 1 denotes a capacitor case consisting of a metal case body 2 and a lid 3. As shown in FIG. 4
As shown in FIG. 2, these are rivets that penetrate through the lid 3, and are protrusions having a height and width of about 0.1 to 0.8 mm on the inside of the flange 5, and are provided at two or more locations. 7 is a terminal connected to the tip of the rivet 4. 8 is made of plastic and has a thickness of 0.3~ as shown in Figure 3.
It is an insulating plate of about 0.5mm. Reference numeral 9 designates recesses having a depth and width of approximately 0.2 to 1.0 mm provided in the insulating plate 8. Four or more recesses are provided, and the protrusions 6 of the rivet 4 are inserted into some of the recesses. 10 is a width of 1 mm provided between the holes 11 through which the rivets 4 of the insulating plate 8 pass.
The above is a partition wall with a height of 2 mm or more, which protects the creepage caused by arc discharge. 12 is a rubber packing attached between the insulating plate 8 and the lid 3 and having the rivet 4 penetrated therethrough. 13 is a bushing that contacts the rubber packing 12 and has the rivet 4 penetrated therethrough, and insulates the terminal 7 from the lid 3.

According to the above embodiment, since the protrusion 6 of the rivet 4 is inserted into the recess 9 of the insulating plate 8, the rivet 4 is fixed to the insulating plate 8 and prevented from rotating.

In the above embodiment, the insulating plate is provided with a recess, but it may also be a hole.

Next, the rotational torque of the rivet was measured for the above embodiment and the conventional example. Regarding the samples, the present invention example has the following: Rivet - Diameter 3 mm (flange part 8 mm) Protrusion provided on the rivet - Width and height both 0.5 mm Insulating plate - Material polybutylene terephthalate Thickness 1.1 mm Recess provided in the insulating plate - Width and depth: 0.6 mm The conventional example is the same as the embodiment of the present invention except that an insulating plate without recesses is used.

The rotational torque is measured by applying rotational force to the terminal and taking the value until it starts rotating.

As a result of the measurement, the inventive example was 7.9Kgcm, while the conventional example was 3.6Kgcm, and the former was approximately
A value of more than 2.2 times was obtained.

(Effects of the Invention) As described above, according to the present invention, since the protrusion provided on the rivet is inserted into the recess or hole provided in the insulating plate, the rotational torque of the rivet can be improved, and lead wire disconnection defects can be reduced. A flexible capacitor case is obtained.

[Brief explanation of drawings]

Fig. 1 is a front sectional view of an embodiment of the present invention, Fig. 2 is a perspective view of a rivet used in an embodiment of the invention, Fig. 3 is a plan view of an insulating plate used in an embodiment of the invention, and Fig. 4 is a conventional rivet. A front sectional view of the cap of the capacitor case is shown. 1... Capacitor case, 3... Lid, 4...
Rivet, 5... Flange, 6... Protrusion, 7... Terminal, 8... Insulating plate, 9... Recess, 10... Partition wall.

Claims (1)

[Scope of Claims] 1. A case for a capacitor that has a built-in capacitor element and can be sealed, comprising: a rivet having a protrusion on the inside of the flange and penetrating the lid, a terminal connected to the tip of the rivet, and the flange. 1. A capacitor case comprising: an insulating plate having a recess or hole into which a projection is inserted, and an insulating plate through which the rivet passes and is fixed to the lid. 2. The capacitor case according to claim 1, further comprising an insulating plate having partition walls between holes through which the rivets pass.