JPH0810166Y2 - Inverter transformer - Google Patents

Description

[Detailed description of the device]

[0001]

The present invention relates to a small inverter transformer.

[0002]

2. Description of the Related Art A coil bobbin 20 of a transformer of this type has a plurality of flanges 21 to 24 on its secondary side, as shown in FIG.
Has a multi-divided structure. In the figure, 25 is a primary winding, 26 is a secondary winding wound in the secondary region,
The lead wire 26a at the end of the winding is stretched over the upper portion of the winding 26 through the flanges 22 to 24 and the like, and has a structure to be drawn to the outside.

[0003]

[Problems to be solved by the invention] Therefore, the secondary winding 2
Since the lead wire 26a at the end of winding 6 and the secondary winding 26 are close to each other, there is a problem in terms of insulation.

The present invention has been proposed in view of the above circumstances, and an object of the present invention is to provide an inverter transformer capable of ensuring sufficient insulation between a lead wire and a secondary winding.

[0005]

In order to achieve the above-mentioned object, the present invention has outer flanges 5 and 6 formed at both ends of a body 2, respectively, and a plurality of first to fourth intermediate flanges 7 therebetween. 10 is formed and the secondary winding 12 wound on the body 2 has a multi-divided structure, and is drawn out from the outer flange 5 side to the opposite flange 6 side. The lead wire 12b at the winding end of the secondary winding 12 is connected to the second intermediate flanges 8 to 4.
Of the intermediate flange 10 is drawn out through the guide grooves 8a to 10a for drawing out the lead wire, which are formed in the extended portion on the one end side of the intermediate flange 10, and these guide grooves 8a to 10a are sequentially positioned outwardly toward the flange 6 side. It is characterized by being formed and configured.

[0006]

In the present invention, as described above, for drawing out a lead wire provided on one end side extending outside each of the intermediate flanges 8 to 10 provided on the secondary winding 12 side with a proper interval therebetween. The guide grooves 8a to 10a are gradually moved to the outer side toward the high potential side of the secondary winding 12, and the guide groove 8a for leading the lead wire is formed.
Since the lead wire 12b at the end of the winding is drawn to the outside via 10a to 10a, the distance between the lead wire 12b and the secondary winding 12 increases as the potential increases, and sufficient insulation can be secured.

[0007]

1 is a plan view of a coil bobbin according to an embodiment of the present invention, FIG. 2 is a side view thereof, and FIG. 3 is a bottom view thereof.
Reference numeral 1 in the drawings denotes a coil bobbin in which outer flanges 5 and 6 having thick portions 5a and 6a in which pin terminals 3 and 4 are implanted are formed at both ends of a hollow body 2, respectively. First to fourth intermediate flanges 7 to 10 are formed on the outer periphery of 2 at desired intervals.

Further, as shown by an imaginary line, the primary winding 11 is provided between the outer flange 5 on one side and the first intermediate flange 7 which is arranged to face the flange 5 with a gap therebetween.
Is wound. Further, the second intermediate flange 8 arranged with a gap from the first intermediate flange 7, and the third and fourth intermediate flanges 9 provided with a gap with another,
10, a secondary winding 12 is wound between the outermost flange 6 on the other side, as also shown by a virtual line. In the illustrated embodiment, the number of intermediate flanges is four, but the number can be increased or decreased as necessary.

Therefore, as shown in FIG. 3, on the bottom surface of the coil bobbin 1, the second bobbin 1 is arranged between the secondary windings 12.
-Leader wire lead-out guide for guiding the lead-out wire 12b at the end of the secondary winding 12 at the edge of one end portion on the bottom surface side extending outwardly of the fourth intermediate flanges 8-10 Grooves 8a-1
0a are formed respectively.

Guide grooves 8a to 10a for drawing out these lead wires
Is gradually formed in the outer position as it goes to the higher potential side of the secondary winding 12, that is, as it goes from the second intermediate flange 8 to the outer flange 6 on the other side. It is configured to be separated from the winding wire 12. Therefore, as shown in FIG. 3, the lead wire 12 of the secondary winding 12 is
b gradually becomes 2 as it goes to the higher potential side of the secondary winding 12.
Since it is separated from the next winding 12, sufficient insulation can be achieved between them.

The second to fourth intermediate flanges 8 to 10 of the coil bobbin 1 have second to fourth intermediate flanges at the other end opposite to the one end where the lead wire drawing guide grooves 8a to 10a are provided. Notches a for guiding the winding for moving and winding the secondary winding 12 are respectively formed in between, and the notches of these notches a are cut out to the body portion 2.

4 to 6 are exploded perspective views of the inverter transformer of the present invention. In assembling, first, as shown in FIGS. 1 to 3, a primary winding 11 is wound between an outer flange 5 on one side of the coil bobbin 1 and a first intermediate flange 7 facing the outer flange 5. To do. The lead wire 11a of the primary winding 11 is drawn out through a lead wire guide groove 11b formed in the bottom surface of the flange 5 (see FIG. 3), and is entwined with an appropriate pin terminal 3.

The lead wire 12 at the beginning of the winding of the secondary winding 12
The a is guided by the lead wire guide groove 6b formed in the other outer flange 6 to the body portion 2 side and is wound. After a predetermined number of turns between the flange 6 and the fourth intermediate flange 10, the leader line is guided to the adjacent region through the notch a of the fourth intermediate flange 10 and wound. In this way, the lead wire 12b after winding and at the end of winding is drawn from the portion of the first intermediate flange 7 to the flange 6 side.

In this case, the lead wire 12b at the end of the winding is guided by the guide grooves 8a of the intermediate flanges 8 to 10 for leading the lead wire.
It is drawn out through 10a. As described above, the guide grooves 8a to 10a for drawing out the respective lead wires are provided at positions gradually outward from the second intermediate flange 8 toward the flange 6 side. The distance between the lead wire 12b and the wound secondary winding 12 increases as it goes toward the flange 6 side.

The connecting portions of the lead wires 11a, 12a and 12b which are entwined with the predetermined pin terminals 3 and 4 are soldered. Then, as shown in FIG. 4, in such an assembly A, a box-shaped accommodating portion 13a that covers the windings 11 and 12 and the flanges 5 to 10 and a rectangle that extends horizontally in the outer circumference thereof. If the cover 13 made of synthetic resin having the frame-shaped flange 13b is covered, the front side of the coil bobbin 1 can be covered.

Next, from both sides of the assembly A, the E-E type iron cores 14 made of ferrite are incorporated, and as shown in FIG. 5, a protective cover 1 made of synthetic resin and having a substantially U-shape.
5, the lower part and the side part of the assembly A are covered with the substantially rectangular bottom plate 15a and the side plate 15b of the protective cover 15 from the left side in the illustrated state, and the protective cover 1
The upper end portion 15c bent inward at the upper side of 5
If it is located at the side of the upper surface of 4, the coil bobbin 1 can be easily mounted and the back side of the coil bobbin 1 can be covered, as shown in FIG. 6, thus completing the inverter transformer. it can.

As described above, according to the present invention, the secondary winding 12 is pulled out to the outside so that the lead wire 12b at the end of the winding is directed toward the high potential side of the secondary winding 12. Since it is separated from the lead wire 12, the lead wire 12b and the secondary winding 12 can be insulated.

[Brief description of drawings]

FIG. 1 is a plan view of a coil bobbin according to an embodiment of the present invention.

FIG. 2 is a side view of the above coil bobbin.

FIG. 3 is a bottom view of the above coil bobbin.

FIG. 4 is an exploded perspective view of an inverter transformer of the present invention.

FIG. 5 is an explanatory view showing a state where a protective cover is attached to the transformer body of the present invention.

FIG. 6 is a perspective view of an assembled state of the inverter transformer of the present invention.

FIG. 7 is a conventional example.

[Explanation of symbols]

 1 Coil Bobbin 2 Body 3 Pin Terminal 4 Pin Terminal 5 Flange 6 Flange 7 Intermediate Flange 8 Intermediate Flange 9 Intermediate Flange 10 Intermediate Flange 11 Primary Winding 12 Secondary Winding 12b End Leader Wire 13 Cover 14 Iron Core 15 Protective Cover

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Hiroshi Usami 5-5-30 Chiyoda, Sakado City, Saitama Pref., Tamura Corporation, Saitama Plant (56) References Flat 1-131321 (JP, U) Actually opened Sho 54-19925 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. Outer flanges 5, 6 are formed at both ends of the body 2, respectively, and a plurality of first to fourth intermediate flanges 7-10 are formed between them, and the outer flanges 5 and 6 are wound on the body 2. In the transformer for an inverter in which the secondary winding 12 has a multi-divided structure, a lead wire 12b at the end of the secondary winding 12 is drawn from the outer flange 5 side to the opposite flange 6 side. , The second intermediate flanges 8 to 4
Of the intermediate flange 10 is drawn out through the guide grooves 8a to 10a for drawing out the lead wire, which are formed in the extended portion on the one end side of the intermediate flange 10, and these guide grooves 8a to 10a are sequentially positioned outwardly toward the flange 6 side. Inverter transformer characterized by being formed.