Winding structure of transformer

Details Winding structure of transformer Winding structure of transformer

2002-03-05

2003-10-07

Nguyen, Tuyen T. (Department: 2832)

Inductor devices

With supporting and/or spacing means between coil and core

Preformed insulation between coil and core

C336S208000

Reexamination Certificate

active

06630880

ABSTRACT:

FIELD OF THE INVENTION
The present invention is related to a winding structure of a transformer, and more particularly, to a winding structure of a transformer which can be easily assembled.
BACKGROUND OF THE INVENTION
As shown in
FIG. 1
, a conventional winding structure of a transformer which can be assembled includes two primary bobbin pieces
11
, one secondary bobbin piece
12
, and two shields
13
. The primary bobbin piece
11
further includes one first winding tube
110
and two end plates
111
and
112
beside the first winding tube
110
; wherein, the first winding tube
110
is provided for winding a primary winding (not shown). The secondary bobbin piece
12
further includes one secondary winding tube
120
and two end plates
122
,
122
beside the secondary winding tube
120
; wherein, the secondary winding tube
120
is provided for winding a secondary winding (not shown). The end plates
112
,
122
separately connect to both sides of the shield
13
. A base
1110
is located at the lower end of the end plate
111
for welding with a primary pin lead (not shown) and a secondary pin lead (not shown) so that the end of the primary winding and the end of the secondary winding can be welded thereon. Finally, a core is covered on the assembly of the primary bobbin piece
11
and the secondary bobbin piece
12
so as to accomplish the construction of the conventional transformer which can then be assembled. Although, the structure mentioned above can meet the electronic safety reqiurement of “creepage and clearance distance” of the transformer in most of countries; however, the assembly of the winding structure of a transformer requires five independent elements (two primary bobbin pieces
11
, one secondary bobbin piece
12
, and two shields
13
); therefore, it has the disadvantages of high cost and being not easy for assembly.
SUMMARY OF THE INVENTION
It is therefor a object of the present invention to provide a winding structure of a transformer which requires only two assembly elements and then is less costly in respect of manufacturing and material controlling.
It is another object of the present invention to provide a winding structure of a transformer have multiple functions, i.e., winding; core positioning; engaging; and circuit board positioning.
According a preferred embodiment of the present invention, the winding structure of a transformer includes: a first winding tube assembly which further includes a first lateral plate, a second lateral plate with a first connection apparatus, and a first winding tube positioned between the first lateral plate and the second lateral plate; a second winding tube assembly which further includes a first end plate, a second end plate with a second connection apparatus, and a second winding tube positioned between the first end plate and the second end plate; wherein the first connection apparatus and the second connection apparatus are matched together to form and define a third winding tube.
Preferably, the first winding tube assembly and the second winding tube assembly are made of an insulation material.
Preferably, the first winding tube and the second winding tube are respectively wound with two primary windings.
Preferably, the third winding tube is wound with a secondary winding.
Preferably, the third winding tube is further wound with a primary winding.
Preferably, the first connection apparatus and the second connection apparatus are respectively a first protruding ring and a second protruding ring, said third winding tube is defined after said both rings are matched together.
Preferably, the second protruding ring includes an upper protruding ring and a lower protruding ring, the inner diameter of the first protruding ring substantially equals to the outer diameter of the upper protruding ring, and the outer diameter of the first protruding ring substantially equals to the outer diameter of the lower protruding ring.
Preferably, the first connection apparatus and the second connection apparatus are respectively a sleeve and a cylinder.
Preferably, the first connection apparatus and the second connection apparatus are respectively two first protruding sheets and two second protruding sheets so as to enhance a positioning effect along a horizontal direction.
Preferably, the winding structure of a transformer further includes an core.
Preferably, the core is one of an EI-core and an EE-core.
Preferably, the first lateral plate has a first core positioning device.
Preferably, the first core positioning device is a first groove formed by the two first protruding plates.
Preferably, the first end plate has a second core positioning device.
Preferably, the second core positioning device is a second groove formed by the two second protruding plates.
Preferably, a first base and a second base are respectively installed at lower portions of the first lateral plate and the first end plate for placing thereon a plurality of connection contacts.
Preferably, the first lateral plate and the first end plate respectively have at least two feet extending downward.
According another preferred embodiment of the present invention, the winding structure of a transformer includes: a first winding tube assembly which further includes a first lateral plate, a second lateral plate with a first connection apparatus, and a first winding tube positioned between the first lateral plate and the second lateral plate, the first lateral plate further has a first core positioning device and a first base; a second winding tube assembly which further includes a first end plate, a second end plate with a second connection apparatus, and a second winding tube positioned between the first end plate and the second end plate, the first end plate further has a second core positioning device and a second base; whereby the first connection apparatus and the second connection apparatus match together to form and define a third winding tube, the first core positioning device and the second core positioning device respectively initially position a first core element and a second core element.
Preferably, the first winding tube assembly and the second winding tube assembly are made of an insulation material.
Preferably, the first winding tube and the second winding tube are respectively wound with two primary windings and the third winding tube is wound with a secondary winding.
Preferably, the first connection apparatus and the second connection apparatus are respectively a first protruding ring and a second protruding ring, said third winding tube is defined after said both rings are matched together.
Preferably, the second protruding ring includes an upper protruding ring and a lower protruding ring, the inner diameter of the first protruding ring substantially equals to the outer diameter of the upper protruding ring, and the outer diameter of the first protruding ring substantially equals to the outer diameter of the lower protruding ring.
Preferably, the first connection apparatus and the second connection apparatus are respectively a sleeve and a cylinder.
Preferably, the first connection apparatus and the second connection apparatus are respectively two first protruding sheets and two second protruding sheets so as to enhance a positioning effect along a horizontal direction.
Preferably, the first core positioning device is a first groove formed by the two first protruding sheets.
Preferably, the second core positioning device is a second groove formed by the two second protruding sheets.
Preferably, the first lateral plate and the first end plate respectively have at least two feet extending downward.
Now the foregoing and other features and advantages of the present invention will be more clearly understood through the following descriptions with reference to the drawings, wherein:


REFERENCES:
patent: 5010314 (1991-04-01), Estrov
patent: 6278353 (2001-08-01), Downing et al.
patent: 6344786 (2002-02-01), Chin

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