Coil components

Abstract

To provide a coil component having a structure where a terminal electrode and a groove are provided on a flange of a core, and a wire connected to the terminal electrode is received into the groove, the structure being able to increase the flexibility in inserting a wire into a groove provided in the flange of the core and also to reduce variations in positions of the wire within the groove.SOLUTION: A groove 25 for receiving an end portion of a wire 23 is provided on a mounting surface 7 of a flange 5, the groove extending in a direction in which an inner end surface 9 and an outer end surface 10 of the flange 5 are linked with each other. The groove 25 forms a bottom surface 29 sandwiched between a first side 27 and a second side 28 extending in the direction in which the inner end surface 9 and the outer end surface 10 are linked with each other. The first side 27 is located closer to a pull-out position 33 of the wire 23 from a winding core 3 than the second side 28. A distance between the first side 27 and the second side 28 is narrower on a side of the inner end surface 9 and is wider on a side of the outer end surface 10. An angle of the first side 27 with respect to an axial direction A is smaller than that of the second side 28 with respect to the axial direction.SELECTED DRAWING: Figure 2

Claims

1. The core comprises a winding core portion extending in the axial direction, and a first flange portion and a second flange portion provided at the first and second ends of the winding core portion that are opposite to each other in the axial direction, respectively. Each of the first flange portion and the second flange portion has a mounting surface that faces the mounting substrate side during mounting, an inner end surface that faces the winding core portion side, and an outer end surface opposite to the inner end surface, and further, A first terminal electrode and a second terminal electrode are provided on at least the mounting surface of the first flange and the second flange, respectively. The device comprises at least one wire wound around the core portion while being connected between the first terminal electrode and the second terminal electrode, At least one of the mounting surfaces of the first flange and the second flange is provided with a groove for receiving the end of the wire, extending in the direction connecting the inner end face and the outer end face. The groove is open at least on the inner end face side, and forms a bottom surface sandwiched between a first side and a second side extending in the direction connecting the inner end face and the outer end face, as well as a first rising surface and a second rising surface rising from the bottom surface via the first side and the second side, respectively. The first side is located closer to the wire exit point from the winding core than the second side. The distance between the first and second sides is narrower on the inner end face side and wider on the outer end face side, The angle that the first side makes with respect to the axial direction is smaller than the angle that the second side makes with respect to the axial direction. A coil component in which, when the direction in which the mounting surface extends and which is perpendicular to the axial direction is defined as the width direction, the groove is located in the width direction on the side of the position of the wire drawn out from the winding core that is relative to the central axis of the winding core.

2. The coil component according to claim 1, wherein the grooves are provided on the mounting surfaces of the first flange and the second flange, respectively.

3. The coil component according to claim 1 or 2, wherein the bottom surface of the groove is sloped such that the groove becomes shallower from the inner end surface side toward the outer end surface side.

4. The coil component according to claim 1 or 2, wherein the inner angle between each of the first rising surface and the second rising surface and the bottom surface is an obtuse angle.

5. The coil component according to claim 1, wherein the first side extends parallel to the axial direction.

6. The coil component according to claim 1 or 2, wherein the distance between the first side and the second side is wider than the diameter of the wire.

7. The coil component according to claim 1 or 2, wherein the depth of the groove, represented by the height difference between the mounting surface and the bottom surface, is shallower than the diameter of the wire.

8. The opening edge on the mounting surface of the groove has a pair of straight portions extending parallel to each other, The coil component according to claim 1 or 2, wherein the angle that the first side makes with respect to the direction in which the straight portion extends is smaller than the angle that the second side makes with respect to the direction in which the straight portion extends.

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