Coupling structure for mounting core of flyback transformer

Details Coupling structure for mounting core of flyback transformer Coupling structure for mounting core of flyback transformer

2000-06-09

2002-02-12

Sircus, Brian (Department: 2839)

Electrical connectors

With coupling movement-actuating means or retaining means in...

Retaining means

Reexamination Certificate

active

06346001

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to a coupling structure, and more particularly, to a coupling structure for mounting a core of a flyback transformer.
BACKGROUND OF THE INVENTION
A flyback transformer is generally implemented within the circuits of a display device for providing distinctive voltages required by the circuits operation of the display device. Some U.S. Pat. Nos. i.e. 5,160,872, 5,287,479 and 4,144,480 may be referred in order to have an in-depth understanding of structures of the flyback transformer and functions of the High Voltage output, Focus output and Screen output of the flyback transformer.
Please refer to
FIGS. 1 and 2
.
FIG. 1
is a schematic diagram of a flyback transformer
10
according to the prior art.
FIG. 2
is an exploded diagram of the flyback transformer
10
shown in FIG.
1
. Flyback transformer
10
of the prior art comprises a low-voltage bobbin
12
, a high-voltage bobbin
14
, an upper core
16
, a lower core
18
, a housing
20
and a clip
22
. The assembly procedure of the flyback transformer
10
comprises: first, installing a winding shaft (not shown) of the low-voltage bobbin
12
into a shaft hole (not shown) of the high-voltage bobbin
14
; secondly, installing the low-voltage bobbin
12
and high-voltage bobbin
14
into the housing
20
; thirdly, installing the upper and lower cores
16
,
18
on the low-voltage bobbin
12
respectively; finally, mounting the upper and lower cores
16
,
18
by the clip
22
to form the flyback transformer
10
.
In general, a clip
22
made of nonmagnetic metallic material is used to mount the upper and lower cores
16
,
18
on the low-voltage bobbin
12
within the assembly procedure of the flyback transformer
10
. The purpose is to apply the flexibility of the clip
22
for mounting the upper and lower cores
16
,
18
on the low-voltage bobbin
12
. However, the use of clip
22
increases the product cost, and more particularly, an additional assembly step is required during the assembly procedure of the flyback transformer
10
.
SUMMARY OF THE INVENTION
The present invention provides a coupling structure for mounting a core of a flyback transformer. The flyback transformer comprises a low-voltage bobbin, a housing, a lower core, an upper core and the coupling structure. The low-voltage bobbin comprises a winding shaft and a skirt. The winding shaft has an upper opening for receiving the upper core. The skirt has a lower opening for receiving the lower core. An internal surface of the skirt is defined by the lower opening. The coupling structure comprises at least one upper coupling device provided on the housing for mounting the upper core and at least one lower coupling device provided on the internal surface of the skirt for mounting the lower core. Besides, the upper core engages into the housing by the upper coupling device through the winding shaft and the lower core engages into the low-voltage bobbin by the lower coupling device through the skirt according to a predetermined procedure. Therefore, the flyback transformer applied with the coupling structure of the present invention will no longer apply said clip. The product cost will be reduced and the additional step in the assembly procedure of the flyback transformer will be removed as well.
These and other objectives of the present invention will no doubt become obvious to those of ordinary skill in the art after reading the following detailed description of the preferred embodiment which is illustrated in the various figures and drawings.


REFERENCES:
patent: 3651446 (1972-03-01), Sadogierski et al.
patent: 4144480 (1979-03-01), Nagasaki et al.
patent: 4408176 (1983-10-01), Nakamura
patent: 4475097 (1984-10-01), Kikuchi
patent: 5160872 (1992-11-01), Kenji et al.
patent: 5180312 (1993-01-01), Martin
patent: 5287479 (1994-02-01), Masaru et al.
patent: 5448216 (1995-09-01), Kuze et al.
patent: 5745020 (1998-04-01), Shen-Long et al.
patent: 5798682 (1998-08-01), Kim et al.
patent: 5921808 (1999-07-01), Haftmann et al.
patent: 6010362 (2000-01-01), Caviness et al.

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