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Surface mounted inductor

A surface-mounted, inductor technology, applied in the direction of inductors, fixed inductors, transformers/inductor cores, etc., can solve the problems of wiring parts too close to winding parts, winding parts short-circuited, exposed, etc.

Pending Publication Date: 2022-04-22
TDK CORPARATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the conventional surface mount inductors, if the number of turns of the wire is increased in a small core, the problem arises that the connection portion for fixing the wire to the electrode portion is too close to the winding portion of the wire.
Here, if the distance between the winding portion and the wiring portion is insufficient, there may be a problem that the influence of heat from the wiring portion is transmitted to the winding portion of the wire, or the lead wire is exposed from the insulating coating of the winding wire, or A short circuit occurs in the winding part

Method used

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Examples

Experimental program
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Effect test

no. 1 Embodiment approach

[0085] figure 1 It is a front view of a surface mount inductor 10 (hereinafter simply referred to as "inductor 10") according to an embodiment of the present invention. The inductor 10 has a core 20 as a drum core, a plate core 30 , electrode portions 44 , 47 and a winding 50 . The inductor 10 has a substantially rectangular parallelepiped outer shape, and is surface-mounted on a mounting substrate by, for example, being transported by sucking and holding the upper surface of the core 30 by a suction nozzle of a mounting machine. However, the inductor 10 is not limited to having the core 30 , and the suction nozzle may be adsorbed to other parts of the inductor 10 .

[0086] The core 20 and the board core 30 are bonded to each other with an adhesive such as an epoxy-based adhesive. Figure 9 is to remove figure 1 A cross-sectional view of a portion of core 30 in inductor 10 is shown. Such as Figure 9 As shown, the core 20 has a winding core portion 22 and a pair of flang...

no. 2 Embodiment approach

[0119] Figure 12 to Figure 17 It is a front view, a rear view, a left side view, a right side view, a top view, and a bottom view of the inductor 110 which concerns on 2nd Embodiment of this invention. The inductor 110 according to the second embodiment is the same as the inductor 10 according to the first embodiment except that the shape of the lower inner edge 125f of the flange portions 124 and 127 of the core 120 is different. About the inductor 110 which concerns on 2nd Embodiment, only the difference from the inductor 10 is demonstrated, and the description of the common point with the inductor 10 is abbreviate|omitted.

[0120] Such as Figure 12 As shown, the lower inner edge 125f of the flange portion 124 is chamfered (surface C). Like the inductor 110 , the lower inner edge 125 f of the flange portion 24 may be chamfered without R-processing. In this case, the R machining radius of the lower outer edge 25e is preferably larger than the chamfering dimension of the...

no. 3 Embodiment approach

[0123] Figure 18 It is a front view of the inductor 210 according to the third embodiment of the present invention, excluding the flat portion. In the inductor 210 according to the second embodiment, the first part side part 252c is inclined with respect to the virtual plane A perpendicular to the axial direction of the winding core part 22, and the first part upper side part 252b is parallel to the virtual plane A. Others are the same as the inductor 10 according to the first embodiment. Regarding the inductor 210 according to the third embodiment, only the points different from the inductor 10 will be described, and the description of the points common to the inductor 10 will be omitted.

[0124] Such as Figure 18 As shown, in the inductor 210, in the first part 252 of the winding 250, the first part side part 252c connecting the first part upper side part 252b and the first part lower side part 52a, with respect to the virtual plane A It is wound obliquely with an incl...

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Abstract

The invention provides a surface mounting type inductor which is small in size and capable of preventing damage of an insulating coating caused by heat influence from a winding wire end part. The surface mount type inductor is characterized by comprising: a core having a winding core portion and a pair of flange portions connected to both sides of the winding core portion; a pair of electrode parts formed on the outer peripheral surface of at least a part of the pair of flange parts; and a winding wire which is wound around the winding core portion and has a pair of winding wire end portions fixed to the pair of electrode portions, the winding wire having a first portion wound in contact with an adjacent turn and a second portion wound apart from the adjacent turn and connected to the winding wire end portions, the first portion being wound around the winding core portion, and the second portion being wound around the winding core portion and having a pair of winding wire end portions fixed to the pair of electrode portions. The second portion is separated from a lower side edge of the edge of the winding core portion, wherein the winding end portion is fixed on the mounting surface side of the electrode portion.

Description

technical field [0001] This invention relates to surface mount inductors. Background technique [0002] Surface mount inductors pursue miniaturization and increased inductance. In order to promote the miniaturization and high inductance of surface mount inductors, it is conceivable to tightly wind the core and increase the number of turns (see Patent Document 1, etc.). [0003] However, in conventional surface mount inductors, if the number of turns of the wire is increased for a small core, the connection portion for fixing the wire to the electrode portion is too close to the winding portion of the wire. Here, if the distance between the winding portion and the wiring portion is insufficient, there may be a problem that the influence of heat from the wiring portion is transmitted to the winding portion of the wire, or the lead wire is exposed from the insulating coating of the winding wire, or A short circuit occurs in the winding part. [0004] [Prior Art Literature] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/28H01F27/29H01F27/32H01F37/00H01F17/04
CPCH01F27/2828H01F27/2823H01F27/29H01F17/04H01F37/00H01F27/324H01F27/292H01F17/045H01F27/263H01F27/24
Inventor 篠原良荣小池仁宽西村宗仁
Owner TDK CORPARATION
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