Coil component

Patent metadata

Field	Value
Publication number	US-12080462-B2
Application number	US-202217821427-A
Country	US
Kind code	B2
Filing date	Aug 22, 2022
Priority date	Jun 11, 2018
Publication date	Sep 3, 2024
Grant date	Sep 3, 2024

Abstract

A coil component comprising a core having a winding core part, and a coil wound around the winding core part and including a plurality of wires. The coil includes a twisted wire portion in which the plurality of wires is twisted together. The twisted wire portion includes a bank region including a first layer wound multiple turns continuously around the winding core part and a second layer wound on the first layer continuously from the first layer. The bank region is sparsely wound with the number of turns of the second layer reduced by two or more as compared to the number of turns of the first layer.

First claim

The invention claimed is:

1. A coil component comprising:
a core having a winding core part; and
a coil wound around the winding core part and including a plurality of wires, wherein
the coil includes a twisted wire portion in which the plurality of wires is twisted together,
the twisted wire portion includes a plurality of bank regions arranged along the winding core part in an axial direction of the winding core part, each of the bank regions including a first layer wound multiple turns continuously around the winding core part and a second layer wound on the first layer continuously from the first layer, and
a bank region from among the plurality of bank regions arranged closest to a terminal end of the winding core part is a closely-wound bank region having a number of turns of the second layer reduced by one as compared to a number of turns of the first layer,
all the bank regions except for the closely-wound bank region are sparsely wound with a number of turns of the second layer reduced by two or more as compared to a number of turns of the first layer.

2. The coil component according to claim 1 , wherein in the sparsely-wound bank region, the second layer is shifted toward a final turn of the first layer.

3. The coil component according to claim 2 , wherein the second layer includes a portion wound on the final turn of the first layer.

4. The coil component according to claim 1 , wherein in the sparsely-wound bank region, the number of turns of the first layer is five or less.

5. The coil component according to claim 1 , wherein the plurality of bank regions includes at least two bank regions having the same shape.

6. The coil component according to claim 5 , wherein in the plurality of bank regions, all the bank regions excluding bank regions at both ends in a direction along the winding core part has the same shape.

7. The coil component according to claim 6 , wherein
the number of layers is two in each of the plurality of bank regions, and
in all the bank regions excluding the bank regions at both ends, the number of turns of the first layer is four while the number of turns of the second layer is two.

8. The coil component according to claim 1 , wherein
the core includes a first flange part disposed at a first end of the winding core part and a second flange part disposed at a second end of the winding core part,
the coil component further comprises a first electrode part and a second electrode part disposed on the first flange part and a third electrode part and a fourth electrode part disposed on the second flange part,
the coil includes a first wire electrically connected to the first electrode part and the third electrode part and a second wire electrically connected to the second electrode part and the fourth electrode part, and the first wire and the second wire are wound in the same direction with respect to the winding core part.

9. The coil component according to claim 8 , wherein
the coil includes a winding region wound around the winding core part and a non-winding region extending away from the winding core part and connected to the first electrode part, the second electrode part, the third electrode part, or the fourth electrode part, and
the first wire and the second wire are untwisted from each other in a portion of the winding region adjacent to the non-winding region.

10. The coil component according to claim 8 , wherein
the coil includes a winding region wound around the winding core part and a non-winding region extending away from the winding core part and connected to the first electrode part, the second electrode part, the third electrode part, or the fourth electrode part, and
a portion of the non-winding region adjacent to the winding region is the twisted wire portion.

11. The coil component according to claim 10 , wherein
the non-winding region includes a non-twisted wire portion continued from the twisted wire portion and having the first wire and the second wire untwisted, and
in the non-twisted wire portion, the length of the first wire and the length of the second wire are the same.

12. The coil component according to claim 1 , wherein the number of twists per turn of the twisted wire portion is not an integer.

13. The coil component according to claim 12 , wherein the number of twists per turn of the twisted wire portion is n1/n2 (n2 is a prime number).

14. The coil component according to claim 1 , wherein the twisted wire portion includes one or more inverted portions in which the twisting direction is inverted.

15. The coil component according to claim 14 , wherein the number of the inverted portions of the twisted wire portion is an odd number.

16. The coil component according to claim 14 , wherein the twisted wire portion includes a plurality of inverted portions and has a position where the adjacent inverted portions are arranged at equal intervals.

17. The coil component according to claim 2 , wherein in the sparsely-wound bank region, the number of turns of an uppermost layer is one.

18. The coil component according to claim 2 , wherein in the sparsely-wound bank region, the number of turns of the first layer is five or less.

Assignees

• Murata Manufacturing Co

Inventors

• Sukegawa Takashi
• Miyamoto Masashi
• Hashimoto Ryota
• Yamaguchi Chihiro
• Yamaguchi Kentaro

Classifications

• H01F27/2823

  Wires (H01F27/2866 takes precedence) · CPC title

• H01F41/06

  Coil winding · CPC title

• H01F2027/2838

  using transposed wires · CPC title

• H01F3/10

  Composite arrangements of magnetic circuits · CPC title

• H01F27/292

  Surface mounted devices · CPC title