Transformer bobbin

Details Transformer bobbin Transformer bobbin

2001-09-26

2003-02-11

Enad, Elvin (Department: 2832)

Inductor devices

With supporting and/or spacing means between coil and core

Preformed insulation between coil and core

C336S065000, C336S208000

Reexamination Certificate

active

06518870

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a bobbin, and more particularly to a transformer bobbin.
2. Description of the Prior Art
A conventional transformer bobbin
10
, as shown in FIG.
1
(
a
) and FIG.
1
(
b
), is composed of a tubular body
20
and a plurality of partition wall
30
. Among these, the tubular body
20
is used to accommodate a strip of core, and providing winding of wire formed thereon. The wire includes the wire of primary side(not shown) and the wire of secondary side
60
, thereafter called wire
60
for short.
Still referring to FIG.
1
(
a
) or FIG.
1
(
b
), the partition wall
30
is formed on the surface of the tubular body
20
so as to isolate the primary side, the secondary side and a plurality of winding grooves located on the secondary side. The partition wall
30
has a wire guiding notch
31
formed on a section of that. Besides, the partition wall
30
has a flange
33
shown in FIG.
1
(
a
) or a cut corner
35
shown in FIG.
1
(
b
). It should be noted that the flanges
33
and the cut corners
35
are arranged in line, on the same side and the same level. That is, there is no horizontal height difference between the flanges
33
and the cut corners
35
.
Still referring to FIG.
1
(
a
) or FIG.
1
(
b
), the secondary side of the tubular body
20
further has 2 pins, including a start terminal
50
a
and an ending terminal
50
b.
Among these, the start terminal
50
a
is used as a terminal from which winding of wire
60
is started and the ending terminal
50
b
is used as a terminal at which winding of wire
60
is terminated. During the wire
60
extends from the start terminal
50
a
to the ending terminal
50
b,
the wire
60
passes the winding groove so as to form windings. Once the winding number of a winding groove conforms to a predetermined value, the wire
60
extends to the next adjacent winding groove to form another winding. In this manner, selectiveness of voltage is formed. For the simplification of drawing, the present invention merely depicts the wire
60
adjacent to the start terminal
50
a
and the ending terminal
50
b.
Still referring to FIG.
1
(
a
) or FIG.
1
(
b
), during the winding is accomplished and the wire
60
goes back to the ending terminal
50
b,
it is dangerous if the wire
60
lacks of support and fix since the terminal of the wire
60
is on the opposite of the secondary side and thus far from the ending terminal
50
b.
The wire
60
is liable to be cut off.
The wire
60
closes to the outer portion having the highest voltage of the winding and short circuit, resulted from undesired displacement, thus is liable to occur even though the wire
60
is still continuous.
Prior art proposed for solving the above problem includes a step of twisting the wire
60
after which extends from the opposite of the secondary side to the ending terminal
50
b.
The step of twisting is used to strengthen the wire
60
and may solve the problem. However, the step is additional and fails to fix the wire
60
.
Alternatively, the above-mentioned flange
33
or the cut corner
35
is provided to support and fix the wire
60
. However, the bobbin having the cut corners
35
fails to provide the wire
60
with overall support and any fix. For example, the cut corner
35
can prevent the displacement of the wire
60
caused by the external force form the right side of drawing but fails to prevent the displacement of the wire
60
caused by the external force form the left side of drawing. On the other hand, the bobbin having the flange
33
merely supports the wire
60
but fails to provide fix.
Accordingly, there has been a strongly felt need for a novel bobbin providing the wire with support and fix to solve the above-mentioned problem. Besides, it is desired that the manufacturing process of the transformer using the bobbin is simplified.
SUMMARY OF THE INVENTION
The main object of the present invention is to overcome the aforementioned problems. Besides, the present invention omits one manufacturing step compared to prior art.
The present invention includes a tubular body, a first partition wall, at least one second partition wall, at least one third partition wall, a plurality of pins of primary side and two pins of secondary side. The first partition wall is formed on the surface of the tubular body so as to separate the primary side from the secondary side. Additionally, the first partition wall has a first flange having a thinner section used to provide winding of the wire. The second partition walls parallel to the first partition wall are also formed on the surface of the secondary side of the tubular body. Each of the second partition walls has a second breach and a second flange having a second cut corner formed thereon. Each of the third partition walls is interposed between the adjacent second partition walls. The third partition walls has a third breach and a third cut corner formed thereon. The second cut corner and the third cut corner are on the same side but not on the same level.


REFERENCES:
patent: 6078240 (2000-06-01), Huang
patent: 3-161906 (1991-07-01), None

Affiliated with

Also associated with

Rating

Transformer bobbin does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Transformer bobbin, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Transformer bobbin will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3181696