CN-121986386-A - Coil component

Abstract

Provided is a coil component, wherein even if a component arranged at a prescribed interval from a winding core part exists in an integrated core body, the coil component is easy to bring a wire close to one end side in the axial direction of the winding core part when the winding core part starts to wind the wire and during the winding of the wire. In the core body (2), a gap (11) is provided in the top plate (7) at a position closer to the flange (6), and the gap (11) is used for disconnecting a part of a loop of magnetic flux passing through the winding core (3), the first flange (5), the second flange (6) and the top plate (7). An inclined surface (19) which is provided with an inclination in the axial direction is provided on at least a part of the peripheral surface of the winding core (3), for example, the top surface (13), so that the length in the circumferential direction of the winding core (3) becomes shorter as the winding core approaches the first flange (5).

Inventors

• Haramoto Masashi

Assignees

• 株式会社村田制作所

Dates

Publication Date

20260505

Application Date

20240830

Priority Date

20231213

Claims (8)

1. 1. A coil component is provided with: A core body composed of a magnetic body and integrated in a state having a winding core portion, a first flange portion, a second flange portion, and a top plate portion, the first flange portion and the second flange portion being provided at first ends and second ends opposite to each other in an axial direction of the winding core portion, respectively, the top plate portion being located at a predetermined interval from the winding core portion and extending in a direction connecting the first flange portion and the second flange portion; a wire wound around the winding core, and A first terminal electrode and a second terminal electrode provided on the first flange portion and the second flange portion, respectively, and connected to first terminals and second terminals of the wire rod opposite to each other, In the core body, a gap is provided at a position on the side of the second flange portion in the top plate portion, the gap breaking a part of a loop of magnetic flux passing through the winding core portion, the first flange portion, the second flange portion, and the top plate portion and defining a gap allowing passage of the wire rod, At least a part of the peripheral surface of the winding core portion is provided with an inclined surface provided with an inclination in the axial direction so that the closer to the first flange portion, the shorter the length in the circumferential direction of the winding core portion is.
2. 2. The coil component of claim 1, wherein, The cross section of the winding core portion at a surface orthogonal to the axial direction is a square shape or a substantially square shape, and the winding core portion has a top surface facing the top plate portion, a first side surface and a second side surface extending in a direction orthogonal to the top surface and facing each other, and a bottom surface extending parallel to the top surface and connecting the first side surface and the second side surface.
3. 3. The coil component according to claim 2, wherein, The total length of the top surface and the first side surface and the second side surface in the circumferential direction of the winding core portion is shorter as the first flange portion is closer.
4. 4. A coil component according to claim 2 or 3, wherein, The inclined surface is provided in the top surface.
5. 5. The coil component of claim 4, wherein, The inclined surface is provided over the entire area of the top surface in the axial direction.
6. 6. The coil component of claim 4, wherein, The inclined surface is provided only in a portion of the top surface on the first flange portion side.
7. 7. The coil component according to any one of claims 2 to 6, wherein, The inclined surface is provided on the first side surface and the second side surface.
8. 8. The coil component according to any one of claims 1 to 7, wherein, The gap is provided at a connection position of the top plate portion with the second flange portion.

Description

Coil component Technical Field The present invention relates to a coil component, and more particularly to a structure of a core including a winding core around which a wire is wound, a first flange portion and a second flange portion provided at each end of the winding core, and a top plate portion configured to connect the first flange portion and the second flange portion. Background For example, japanese patent application laid-open No. 2003-163119 (patent document 1) discloses a coil component including a core body in which a winding core portion around which a wire is wound, first and second flange portions provided so as to protrude in one direction from each end portion of the winding core portion, and bridge portions extending from the first and second flange portions, respectively, are integrated. The bridge portion is disposed at a predetermined distance from the winding core portion. The bridge portion is provided with a slit (gap) formed at a predetermined interval in a central portion in the longitudinal direction thereof. In the core described in patent document 1, when the wire is wound around the winding core, the presence of the bridge portion disposed at a predetermined interval from the winding core may prevent the winding of the wire. In connection with this, in paragraph 0020 of patent document 1, "the distal end surfaces of the bridge portions 1c are formed so as to face each other with a predetermined interval L therebetween, whereby a gap 7 is formed between the distal end surfaces of the opposing bridge portions 1c, and by using this gap 7, the wire 3 can be wound easily around the main body portion 1 b. ". Patent document 1 Japanese patent laid-open publication No. 2003-163119 When starting winding the wire around the winding core, the wire is preferably brought close to one end side in the axial direction of the winding core. In addition, during winding of the wire material around the winding core portion, it is preferable that a force to bring the wire material closer to one end side in the axial direction of the winding core portion is easily applied. Thus, the wire can be disposed around the winding core portion with the limited axial dimension of the winding core portion effectively utilized. However, in the configuration described in patent document 1, since the bridge portion is provided with a gap that forms a predetermined interval at the center in the longitudinal direction thereof, it is conceivable that the wire is not easily brought close to one end side in the axial direction of the winding core portion at the start of winding the wire around the winding core portion, or that the force to bring the wire close to one end side in the axial direction of the winding core portion is not easily applied during winding of the wire around the winding core portion. Disclosure of Invention Accordingly, an object of the present invention is to provide a coil component in which, even if there is a component arranged at a predetermined interval with respect to a winding core and arranged along an axial direction of the winding core, the coil component is easy to bring a wire closer to one end side in the axial direction of the winding core when winding of the wire around the winding core is started, or is easy to apply a force to bring the wire closer to one end side in the axial direction of the winding core during winding of the wire around the winding core. The coil component includes a core body composed of a magnetic body and having a winding core portion, first and second flange portions provided at first and second ends opposite to each other in an axial direction of the winding core portion, respectively, and a top plate portion provided at a predetermined interval from the winding core portion and extending in a direction connecting the first and second flange portions, a wire wound around the winding core portion, and first and second terminal electrodes provided at the first and second flange portions, respectively, and connected to first and second terminals opposite to each other of the wire. Here, the top plate portion corresponds to a member disposed at a predetermined interval from the winding core portion and disposed along the axial direction of the winding core portion. In the core, a gap is provided in the top plate portion at a position close to the second flange portion side, the gap breaking a part of a loop of magnetic flux passing through the winding core portion, the first flange portion, the second flange portion, and the top plate portion and defining an interval allowing passage of the wire. In order to solve the above-described technical problem, in the present invention, an inclined surface provided with inclination in the axial direction is provided on at least a part of the peripheral surface of the winding core portion so that the length in the circumferential direction of the winding core portion becomes shorter as the winding core portion approa