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inductor

A technology of inductors and external electrodes, which is applied in the field of inductors, and can solve problems such as unwinding requires more windings, and the shape of the returning winding core lacks stability.

Active Publication Date: 2019-09-27
MURATA MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the above-mentioned coil component, for example, in the case of unwinding a long distance in the second layer, the shape of the return winding core part lacks stability, and there is a possibility that unwinding requires a large number of windings.

Method used

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  • inductor
  • inductor
  • inductor

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Experimental program
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Effect test

Embodiment approach 1

[0047]

[0048] figure 1 It is one side view showing the state of the winding in the case where the external electrodes 3a, 3b provided on the flange portions 2a, 2b of the magnetic core of the inductor 10 according to Embodiment 1 are the bottom surfaces. figure 2 yes means figure 1 Schematic diagram of the sequence of winding. Figure 3 ~ Figure 5 It is a bottom view showing the winding state, the other side view, and a top view, respectively. Figure 6 It is a front view seen from the longitudinal direction of the winding core part 1 of the magnetic core of the inductor 10 of Embodiment 1. figure 1 , Figure 3 ~ Figure 5 with from Figure 6 The correspondences observed for the respective faces of the arrows.

[0049] Figure 1 to Figure 5As shown, the inductor 10 is an inductor 10 formed by winding a winding wire in multiple layers on the winding core part 1, and is composed of a magnetic core and a winding wire (wire), wherein the above-mentioned magnetic core has...

Embodiment approach 2

[0077]

[0078] Figure 7 ~ Figure 10 It is a side view, a bottom view, and the other side view showing the state of winding in a case where the outer electrodes 3a, 3b provided on the flange portions 2a, 2b of the magnetic core of the inductor 10a according to Embodiment 2 are the bottom surface. view, top view. Figure 11 It is the front view seen from the longitudinal direction of the winding core part 1 of the magnetic core of the inductor 10a of Embodiment 1. Figure 7 ~ Figure 10 respectively and from Figure 11 Corresponds to the case of the surface observation of the arrow.

[0079] Compared with the inductor 10 of the first embodiment, the inductor 10 a of the second embodiment differs in that the return core portions C1 and C2 are provided on the side surfaces adjacent to the bottom surface. Specifically, in the returning winding cores C1 and C2, only the part of the third layer passing over the retreating winding layers B1 and B2 as the second layer is regarded...

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Abstract

The present invention provides an inductor that improves the shape stability of a return core portion wound in multiple layers. It includes: a magnetic core having a winding core portion around which a winding wire is wound, and two flange portions provided at both ends of the winding core portion; The winding wire includes: a forward winding layer formed by winding a plurality of turns on the winding core along the forward direction from one flange portion of the above-mentioned two flange portions to the other flange portion, and the forward winding layer is continuous with the forward winding layer. and a retreating winding layer formed by winding at least one turn on the forward winding layer along a retreating direction opposite to the advancing direction, and a retreating winding layer continuous and by winding less than 1 / 2 turns to reach the return core portion of the core portion on the advancing direction side of the forward winding layer.

Description

technical field [0001] The present invention relates to an inductor having a winding wire wound in multiple layers used in mobile communication devices such as mobile phones, smartphones, and tablet computers. Background technique [0002] In recent years, in mobile communication devices such as mobile phones, smartphones, and tablet PCs, inductors used for noise suppression and high-frequency suppression filters have been further reduced in size. Therefore, it is necessary to further suppress the layer thickness when the wire is wound in layers around the magnetic core constituting the inductor, in other words, the layer thickness of the wire. [0003] For example, there is known a coil component in which a winding method of the winding wire has been studied so as to suppress the layer thickness of the winding wire of the coil component (for example, refer to Patent Document 1). [0004] Patent Document 1: Japanese Patent Laid-Open No. 2005-044858 [0005] In the coil com...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F17/04H01F27/24H01F27/30
CPCH01F17/045H01F27/292H01F27/2823H01F27/29H01F27/24
Inventor 鹈饲宏之早川晃宏
Owner MURATA MFG CO LTD