Slim-type magnetic component

Patent metadata

Field	Value
Publication number	US-12334248-B2
Application number	US-202217936209-A
Country	US
Kind code	B2
Filing date	Sep 28, 2022
Priority date	Sep 28, 2021
Publication date	Jun 17, 2025
Grant date	Jun 17, 2025

Abstract

Disclosed is a magnetic component. The magnetic component of the disclosure includes a core unit including an upper core and a lower core, a bobbin unit having at least a portion disposed inside the core unit, and a coil unit including primary coils and secondary coils wound around the bobbin unit in a second direction, which is perpendicular to a first direction oriented from the upper core toward the lower core. The bobbin unit includes a first terminal accommodation portion and a second terminal accommodation portion. The first terminal accommodation portion accommodates first terminal pins, connected to at least some of the secondary coils in the second direction and having end portions bent in the first direction. The second terminal accommodation portion accommodates second terminal pins, connected to the remaining ones of the secondary coils in the second direction and having end portions bent in the first direction.

First claim

What is claimed is:

1. A magnetic component comprising:
a core unit comprising an upper core and a lower core;
a bobbin unit having at least a portion disposed inside the core unit; and
a coil unit comprising primary coils and secondary coils disposed to be spaced apart from each other on the bobbin unit in a second direction, the second direction being perpendicular to a first direction oriented from the upper core toward the lower core,
wherein the bobbin unit comprises:
a wound portion including an upper flange portion, a lower flange portion spaced apart from the upper flange portion, and a middle flange portion connecting the upper flange portion and the lower flange portion;
a first terminal accommodation portion extending in the second direction from the upper flange portion; and
a second terminal accommodation portion extending in the second direction from the lower flange portion,
wherein one side of the first terminal accommodation portion includes a plurality of first terminal pins bent in the first direction,
wherein one side of the second terminal accommodation portion includes a plurality of second terminal pins bent in the first direction
wherein at least a part of the secondary coils is electrically connected to the plurality of first terminal pins in the second direction through the wound portion,
wherein a last part of the secondary coils is electrically connected to the plurality of second terminal pins in the second direction through the wound portion, and
wherein the bobbin unit includes an insulative reinforcement portion exposing the plurality of first terminal pins and the plurality of second terminal pins.

2. The magnetic component according to claim 1 , wherein the secondary coils comprise a first turn and a second turn,
wherein each of the first turn and the second turn comprises a winding portion wound around the bobbin unit and two extension portions extending from the winding portion toward the first and second terminal pins,
wherein one of the extension portions of the first turn and one of the extension portions of the second turn are electrically connected to each other, and
wherein the one of the extension portions of the first turn and the one of the extension portions of the second turn, electrically connected to each other, are disposed in the first terminal accommodation portion.

3. The magnetic component according to claim 2 , wherein a remaining one of the extension portions of the first turn and a remaining one of the extension portions of the second turn are electrically separated from each other, and
wherein the remaining one of the extension portions of the first turn and the remaining one of the extension portions of the second turn, electrically separated from each other, are respectively disposed in the first terminal accommodation portion and the second terminal accommodation portion.

4. The magnetic component according to claim 3 , wherein the primary coils are connected to the first or second plurality of terminal pins formed on another side opposite the one side of the bobbin unit.

5. The magnetic component according to claim 4 , wherein the primary coils comprise a first primary coil and a second primary coil, and
wherein the secondary coils comprise:
a first secondary coil corresponding to the first primary coil;
a second secondary coil electrically connected to the first secondary coil;
a third secondary coil corresponding to the second primary coil; and
a fourth secondary coil electrically connected to the third secondary coil.

6. The magnetic component according to claim 5 , wherein the first secondary coil is electrically connected at a finish-side extension portion thereof to a start-side extension portion of the second secondary coil, and
wherein the third secondary coil is electrically connected at a finish-side extension portion thereof to a start-side extension portion of the fourth secondary coil.

7. The magnetic component according to claim 5 , wherein the first or second terminal pins for the first secondary coil and the second secondary coil are disposed in the second terminal accommodation portion, and
wherein the first or second terminal pins for the third secondary coil and the fourth secondary coil are disposed in the first terminal accommodation portion.

8. The magnetic component according to claim 1 , wherein the first terminal accommodation portion and the second terminal accommodation portion are disposed in parallel to each other in the first direction.

9. The magnetic component according to claim 1 , wherein, among end portions of the first terminal pins, bent in the first direction so as not to overlap the bobbin unit in the second direction, and end portions of the second terminal pins, bent in the first direction so as not to overlap the bobbin unit in the second direction, an end portion having a lowest height is 85% to 99% of a height of an end portion having a highest height.

10. The magnetic component according to claim 1 , wherein the insulative reinforcement portion comprises at least one of epoxy resin and silicon resin.

11. The magnetic component according to claim 1 , wherein a thickness of the first terminal accommodation portion in the first direction is greater than a thickness of the upper flange portion in the first direction, and
wherein a thickness of the second terminal accommodation portion in the first direction is greater than a thickness of the lower flange portion in the first direction.

12. The magnetic component according to claim 11 , wherein an uppermost surface of the first terminal accommodation portion is higher than an uppermost surface of the upper flange portion, and
wherein a lowermost surface of the second terminal accommodation portion is lower than a lowermost surface of the upper flange portion.

13. The magnetic component according to claim 11 , wherein a width of the first terminal accommodating part in a third direction crossing the first direction and the second direction is greater than a width of the upper flange portion in the third direction, and
wherein a width of the second terminal accommodating part in the third direction is greater than a width of the upper flange portion in the third direction.

14. The magnetic component according to claim 13 , wherein the first direction and the second direction are orthogonal to each other, and
wherein the second direction and the third direction are orthogonal to each other.

15. The magnetic component according to claim 1 , wherein the upper flange portion, the lower flange portion, the middle flange portion, the first terminal accommodation portion, and the second terminal accommodation portion are integrally formed.

16. The magnetic component according to claim 11 , wherein the first terminal pins and the second terminal pins are disposed so as not to overlap each other in the first direction.

Assignees

• Lg Innotek Co Ltd

Inventors

• Kim Bi Yi
• Kim Yong Hwan
• Oh Sue Kyung

Classifications

• H01F27/29 Primary

  Terminals; Tapping arrangements {for signal inductances} · CPC title

• H05K2201/1003

  Non-printed inductor · CPC title

• H05K1/181

  associated with surface mounted components · CPC title

• H01F27/325

  Coil bobbins (formers for coils in general H01F5/02) · CPC title

• H01F27/24

  Magnetic cores · CPC title