Chip type capacitor

Details Chip type capacitor Chip type capacitor

2001-12-20

2002-08-27

Dinkins, Anthony (Department: 2831)

Electricity: electrical systems and devices

Electrostatic capacitors

Fixed capacitor

C361S517000, C361S535000

Reexamination Certificate

active

06442014

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Filed of the Invention
The present invention relates to a chip type capacitor, and especially to chip type capacitor having an elastomer of which the outer diameter slightly larger than the inner wall of a receiving chamber is used to increase the sealing tightness of the capacitor.
2. Description of the Related Art
Referring to
FIG. 1
, an exploded perspective view of a prior chip type capacitor is illustrated. The chip type capacitor is formed by a casing cover
110
, an dielectric
120
, an inner cover plate
130
, and an outer cover plate
140
. The dielectric
120
is placed in the receiving chamber
111
of the casing cover
110
. After adding electrolyte, the inner cover plate
130
cover the casing cover
110
. Two lead pins
121
of the dielectric
120
pass through two through holes
131
of the inner cover plate
130
. After filling glue on the inner cover plate
130
, the outer cover plate
140
covers the casing cover
110
and the two are combined by sticky. The two lead pins
121
pass through the two through holes
141
of the outer cover plate
140
.
In this prior chip type capacitor, when the dielectric
120
is placed in the receiving chamber
111
of the casing cover
110
and after the electrolyte is filled thereinto, the inner wall of the receiving chamber
111
of the casing cover
110
will adhere the electrolyte. Therefore, the inner cover plate
130
and the outer cover plate
140
are not be firmly secured to the casing cover
110
. Thereby, the dielectric
120
may separate from the casing cover
110
. The capacitor can not be functioned correctly.
SUMMARY OF THE INVENTION
Accordingly, the primary object of the present invention is to provide a chip type capacitor, wherein an elastomer having an outer diameter slightly larger than the inner wall of a receiving chamber is used to increase the tightness of the elastomer.
Another object of the present invention is to provide a chip type capacitor, wherein the chip type capacitor has a simple structure so that it can be mass-produced easily.
To achieve the object, the present invention provides a chip type capacitor, comprising a casing cover, a dielectric, an elastomer, and a cover plate. The casing cover is formed as an outer casing of a capacitor and an open receiving chamber is provided therein. A plurality of lines capable of being broken are formed at a bottom of the casing cover. The dielectric is received in the receiving chamber of the casing cover. The dielectric has two lead pins. The elastomer has two first through holes. The lead pins pass through the first through holes of the elastomer so that the elastomer covers the dielectric. The cover plate has two second through holes. The lead pins of the dielectric pass through the second through hole of the cover plate so that the cover plate covers the elastomer. An outer diameter of the elastomer is slightly larger than the inner diameter of an inner wall of the receiving chamber. The elastomer is compressed by a fixture and then the elastomer is placed in the receiving chamber for enhancing the sealing of the capacitor.
The four corners of an upper edge of an open end of the casing cover are formed with four pins. The cover plate has four through holes at positions with respect to the four pins. The length of the pin is longer than the thickness of the cover plate. After the cover plate is installed on the elastomer, protruded parts of the pins are melted. Therefore, the cover plate is tightly fixed to the casing cover.
In another embodiment of the present invention, an open end of the casing cover is formed with a wall frame so that the cover plate is combined to the wall frame. Furthermore, the four pins in above embodiment are not utilized. Only four smaller projections are formed. Furthermore, the cover plate and the casing cover are stuck by supersonic combination way.


REFERENCES:
patent: 4314313 (1982-02-01), Elias et al.
patent: 5847919 (1998-12-01), Shimizu et al.
patent: 6118646 (2000-09-01), Yang et al.
patent: 6292348 (2001-09-01), Lin

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