Coil component

Patent metadata

Field	Value
Publication number	US-11615909-B2
Application number	US-202017128387-A
Country	US
Kind code	B2
Filing date	Dec 21, 2020
Priority date	Dec 23, 2019
Publication date	Mar 28, 2023
Grant date	Mar 28, 2023

Abstract

A coil component includes a first core having a leg portion, a second core joined to the first core with the leg portion therebetween, and a magnet disposed between the leg portion and the second core. Movement of the magnet in a first direction intersecting a direction in which the first core and the second core face each other is at least restricted by an uneven structure provided on a junction surface between the magnet and at least one of the first core and the second core.

First claim

What is claimed is:

1. A coil component comprising:
a first core having a main body portion and a leg portion extending from the main body portion in a first direction;
a second core joined to a free end of the leg portion; and
a magnet between the leg portion and the second core,

wherein:
one of the leg portion and the second core includes a motion restriction surface that is configured to restrict movement of the magnet relative to the leg portion and the second core in a second direction perpendicular to the first direction; and
one of (i) the magnet and (ii) the leg portion or the second core includes a protruding portion that is received in and engages a recess in another of (i) the magnet and (ii) the leg portion or the second core such that movement of the magnet is restricted relative to the leg portion and the second core in the second direction by the motion restriction surface.

2. The coil component according to claim 1 ,
wherein:
the motion restriction surface includes a pair of spaced, first restriction wall portions (i) facing each other in a third direction perpendicular to the first direction and the second direction on opposite sides of the magnet and (ii) configured to restrict movement of the magnet in the third direction;
the magnet includes the protruding portion;
the first restriction wall portions form the recess; and
the protruding portion is in the recess.

3. The coil component according to claim 1 , wherein:
the leg portion includes first and second leg portions that are spaced in the second direction or the third direction;
the magnet is in at least one of the first and second leg portions; and
a coil portion is between the first and second leg portions.

Assignees

• Tdk Corp

Inventors

• Li Ge
• Gamou Masahiro

Classifications

• H01F27/263 Primary

  Fastening parts of the core together · CPC title

• H01F3/14

  Constrictions; Gaps, e.g. air-gaps (in magnetic shunt paths H01F3/12) · CPC title

• H01F27/28

  Coils; Windings; Conductive connections · CPC title

• H01F3/10 Primary

  Composite arrangements of magnetic circuits · CPC title

• H01F2003/103

  Magnetic circuits with permanent magnets · CPC title