JP2607763Y2 - Trance - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transformer used for various electronic devices.

[0002]

2. Description of the Related Art In recent years, transformers have been miniaturized using three-layered insulated copper wires as electronic devices have become lighter, thinner and shorter. In order to comply with the safety standards of each country, the insulation distance between the primary and secondary sides must be ensured.

[0003] A conventional transformer will be described below.

FIGS. 6 and 8 are perspective views of a conventional transformer. FIG. 7 is a sectional view of FIG. 6, and FIG.
FIG. 6 to 9, 1 is a magnetic core, 2 is a coil bobbin, 3 is a winding of a three-layer insulated copper wire, 4 is a winding of a copper wire, 5 is a lead of a three-layer insulated copper wire, and 6 is a copper wire , 7 denotes a terminal, 8 denotes a terminal plate portion, 9 denotes a soldering portion, and 10 denotes an insulating paper. In the configuration shown in FIG. 6, the coil bobbin 2 is wound with a three-layer insulated copper wire winding 3, and the lead wire 5 of the three-layer insulated copper wire is wound around the terminal 7, and the insulating paper 10
, And a copper wire lead wire 6 is wound around a terminal 7, and the magnetic core 1 is incorporated in the coil bobbin 2. In the configuration of FIG. 8, the coil bobbin 2 is disposed in parallel on a substrate to be mounted via a terminal 7, and the coil bobbin 2 is provided with a three-layer insulated copper wire winding 3 on the lower side of the flange at both ends of the coil bobbin 2. Lead wire 5 of the above three-layer insulated copper wire
Is wound around a terminal 7, a copper wire winding 4 is applied via an insulating paper 10, and a lead wire 6 made of copper wire is wound around the terminal 7, and the magnetic core 1 is incorporated in the coil bobbin 2.

The operation of the transformer configured as described above will be described below. First, as shown in FIGS. 6 and 8, one of the terminals 7 of the transformer is connected to the primary side, and the other terminal 7 is connected to the secondary side. It is assumed that a three-layer insulated copper wire winding 3 is applied to the terminal 7 connected to the primary side, and a copper wire winding 4 is applied to the terminal connected to the secondary side. Since the three-layer insulated copper wire has an insulating function, the insulation of the three-layer insulated copper wire winding 3 and the copper wire winding 4 applied to the coil bobbin 2 is unnecessary. However, since the lead wire 5 of the three-layer insulated copper wire is wound around the terminal 7 and soldered, the three-layer insulated copper wire wound around the terminal 7 loses the insulating function. In addition, the lead 5 of the three-layered insulated copper wire near the soldered terminal 7 is deteriorated in the coating of the three-layered insulated copper wire due to the heat of soldering. Therefore, the insulation distance must be ensured between the soldered portion 9 of the winding 4 of the copper wire and the three-layer insulated copper wire and the deteriorated portion of the coating of the lead wire 5 of the three-layer insulated copper wire. Therefore, as shown in FIGS. 6 and 8, the terminal plate portion 8 is formed in a rectangular shape to secure an insulation distance.

[0006]

However, in the above-mentioned conventional configuration, the shape of the terminal plate portion becomes large, which is disadvantageous for miniaturization. Further, the degree of deterioration of the coating of the lead wire of the three-layer insulated copper wire differs depending on the above-mentioned soldering, so that the soldering conditions must be controlled with high accuracy, so that the productivity is poor.

[0007]

In order to achieve this object, a transformer according to the present invention has a terminal board for a coil bobbin.
One of the flanges on the side of the
The insulating plate in the direction perpendicular to the
Protruding than the three-layer insulated copper wire lead wire and copper wire
In this configuration , the insulation distance from the winding is secured .

[0008] Further , each surface of both flanges of the coil bobbin is arranged in parallel with the substrate to be mounted.

[0009]

With this configuration, a three-layer insulated copper wire is drawn out.
The insulation distance between the wire and the copper wire winding can be secured by the insulating plate,
Wrap the lead wire of three-layer insulated copper wire around the terminal and solder
The soldered part of the three-layer insulated copper wire and
Deterioration of the coating of the lead wire of the three-layer insulated copper wire and the copper wire
Winding can be insulated. Further, it is also the same production and conventional in solderability.

[0010]

1 and 2 show one embodiment of the present invention.
This will be described with reference to FIGS. 3, 4, and 5.

In the figure, 11 is a magnetic core, 12 is a coil bobbin, 12a is a collar, 13 is a terminal, 14 is a terminal plate, 15 is an insulating plate, 16 is a lead wire guide groove, 17 is a winding of a three- layer coated insulated copper wire, Reference numeral 18 denotes a copper wire winding, 19 denotes a lead of a three-layer coated insulated copper wire, 20 denotes a copper wire, 21 denotes a soldered portion, and 22 denotes an insulating paper.

1, 2 and 3 have flanges 12 at both ends.
comprising a a, a coil bobbin 12 having a terminal plate 14 to the outside of the hand of the flange 12a, the terminal plate 1 of this coil bobbin 12
4 and the insulating plate 15 to one side of the flange 12a with a lead wire guide groove 16 provided between the Coil <br/> flange 12a and ends of the terminal plates 14 of Rubobin, wound in a U Irubobin 12 The terminal 13 is connected to the terminal 13 by being wound around the lead line guide groove 16 about half way from the side opposite to the side on which the terminal 13 connected to the lead line is provided.
At this time, in the direction perpendicular to the direction in which the terminals 13 are planted,
The insulating plate 15 protrudes from the terminal plate 14.

[0013] FIG. 4, the configuration of Figure 5, co Irubobin 1
From the top has 2 are arranged in parallel through the substrate and the terminal 13 to each side of both flange is attached, or retaining clips Irubobin 12 wound to be Ru terminal 13 connected to the lead wire wound in the lower side It is configured to be wound around the lead wire guide groove 16 about halfway.

The operation of the transformer configured as described above will be described below.

[0015] First, FIG. 1, FIG. 2, Ri by the arrangement of FIG. 3, the lead wires of the three-layer coating insulated copper wire in insulation <br/> edge plate 15 side of the terminal 13
19 , and the three-layer insulated copper wire lead wire 1
9 is passed through the lead wire guide groove 16 for about a half circumference, and a winding 17 of a three-layer insulated copper wire is applied from the terminal 13 side opposite to the terminal 13 .
The lead wire 19 of the three-layer coated insulated copper wire at the end of the winding is pulled out from the terminal 13 side facing to the lead wire guide groove 16.
, And wound around the terminal 13 on the insulating plate 15 side. Next, a lead wire 20 of a copper wire is wound around the terminal 13 via the insulating paper 22, and the coil wire 18 is wound around the coil bobbin 12.
In order to wind the lead wire 20 of the copper wire at the end of winding around the terminal 13, the soldered portion 21 of the three-layer coated insulated copper wire and the deteriorated portion of the three-layer coated insulated copper wire 19 and the winding of the copper wire 18 insulation distances can be secured.

In this embodiment, the three-layer insulated copper wire winding 17 is applied, and the copper wire winding 18 is applied via the insulating paper 22. However, the insulating paper 22 may be omitted. Needless to say.

[0017]

[Effect of the invention] As described above, the transformer of the invention is a coil
If one of the flanges on the bobbin side with the terminal plate is an insulating plate
In both cases, make sure that the insulation
Project from the terminal board, and the
And wind the lead wire of the three-layer insulated copper wire.
By providing the lead wire guide groove, three-layer coating absolutely
The insulation distance between the lead wire of the edge copper wire and the winding of the copper wire can be ensured by the insulating plate. In other words, since it is not necessary to secure the insulation distance in the conventional terminal part, the shape of the terminal plate part is changed.
It can be made smaller and is advantageous for miniaturization. Also, excellent productivity since it produced in conventional conditions in solderability Temoi
You.

[Brief description of the drawings]

FIG. 1 is a perspective view of a transformer showing a first embodiment of the present invention.

FIG. 2 is a perspective view of a transformer showing a second embodiment of the present invention.

FIG. 3 is a sectional view of the transformer.

FIG. 4 is a perspective view of a transformer showing another embodiment of the present invention.

FIG. 5 is a sectional view of the same.

FIG. 6 is a perspective view of a conventional transformer.

FIG. 7 is a sectional view of the same.

FIG. 8 is a perspective view of a conventional transformer.

FIG. 9 is a sectional view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Magnetic core 12 Coil bobbin 12a Flange 13 Terminal 14 Terminal board 16 Lead wire guide groove

──────────────────────────────────────────────────続 き Continuing on the front page (72) Osamu Bessho, the creator Osamu Kazuma, Kadoma, Osaka Prefecture 1006, Matsushita Electric Industrial Co., Ltd. (72) Inventor Tetsuya Minamide 1006 Kadoma, Kazuma, Osaka Pref. Matsushita Electric Industrial Co., Ltd. . ^7, DB name) H01F 27/00

Claims (2)

(57) [Scope of request for utility model registration] A flange is provided at both ends, and a flange is provided outside one of said flanges.
A coil bobbin having a terminal plate; and a coil bobbin wound around the coil bobbin.
The wound three-layer insulated copper wire winding, and the three-layer insulated copper
A copper wire wound around the outer periphery of the wire winding;
And between the terminal plate and the three-layered insulated copper wire.
A lead wire guide groove around which a lead wire is wound, and a terminal that is implanted on the lower surface of the terminal plate and has a terminal formed by connecting a lead wire of the three-layer coated insulated copper wire on the lower surface of the terminal plate . The flange on the side having the terminal plate
One is an insulating plate, and the
In the vertical direction, project the insulating plate beyond the terminal plate.
Issued thereby, transformer ensuring insulation distance between the windings of the copper wire and the lead line of the three-layer coating insulated copper wire. 2. A transformer according to claim 1, wherein each surface of both the flange is disposed parallel to the substrate to be mounted in the coil bobbin.