JP2006073853A - Coil component - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coil component having compact, mechanical, electric and highly reliable terminals. <P>SOLUTION: In this choke coil constituted of a magnetic substrate 11, a coil 3, and terminals 12; the terminals are respectively configured by fixing two or more components to the magnetic substrate 11 by mechanical junction. The terminals 12 are respectively constituted of a column having a flange on one side and a ring with the outline dimension of the column as its internal diameter, and configured by putting the columnar section through a hollow section formed in the magnetic materials, and mechanically crushing and fixing the end of the column at the opposite side of the flange. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention mainly relates to a wire ring component used for an electronic component, a power supply device, a portable terminal device, and the like, and particularly relates to a structure of a terminal in the wire ring component.

  As for the terminal of the conventional wire ring component, first, there was a wire ring component having a fitting type electrode at the end of the magnetic substrate of the wire ring component. Second, there is a ring component having an electrode of a type that is bonded to a magnetic substrate with an adhesive. Thirdly, there are wire ring parts having electrodes of a type in which a magnetic substrate is plated or a conductive member is printed.

  For example, Patent Literature 1 describes a choke coil having a terminal formed by fitting a U-shaped magnetic substrate.

  FIG. 8 is an explanatory view of a choke coil which is an example of a conventional wire ring component. FIG. 8A is an external view of the choke coil, and FIG. 8B is an enlarged view of electrodes in the choke coil. The choke coil shown in FIG. 8 includes a magnetic core formed by combining the magnetic substrate 11a and the saddle-shaped core 200, a winding 300 disposed around the middle leg of the saddle-shaped core 200, and the magnetic It is comprised with the adhesion terminal 81 inserted in the part of the corner of the both sides of a body substrate. Here, the lead line 410 drawn out from the winding 300 is electrically joined to the adhesive terminal 81 by solder or the like.

  FIG. 9 is an explanatory diagram of a choke coil having a plating electrode 91 of a type formed by plating a (rod-like) magnetic substrate 500.

JP 2004-95673 A

  In the case of an electrode of a conventional wire ring component that is fitted to the end of a magnetic substrate, it is difficult to reduce the size of the terminal. Here, when the terminal is bonded and fixed with a mold-type wire ring component, the terminal has a problem in terms of reliability. It is difficult to adjust the manufacturing process for plated products.

  An object of the present invention is to provide a wire ring component having a miniaturized mechanical and electrical highly reliable terminal.

  The terminal of the wire ring component of the present invention is characterized in that it is integrated as a terminal by caulking two or more members in order to eliminate the conventional drawbacks.

  That is, the present invention relates to a wire ring component composed of a magnetic material, a winding, and a terminal, wherein the terminal is composed of a first member and a second member, and the first member and the second member The member 2 is a wire ring component fixed to the magnetic material by mechanical deformation means.

  Further, according to the present invention, the terminal includes a first member as a columnar object having a flange on one side, a second member as a plate having a punched portion having a dimension larger than a cross-sectional shape of the columnar object, 1 is a wire ring component in which a columnar portion of one member is passed through a hollow portion provided in the magnetic material, and an end of the columnar object opposite to the heel is mechanically crushed and fixed.

  Further, according to the present invention, in the terminal, the first member is a cylinder having a flange on one side, the second member is a columnar object having a flange on one side, and the cylinder is a hollow portion provided in the magnetic material. It is a wire ring component that is fixed by mechanically deforming the center of the columnar object on the side having the ridges.

  Further, according to the present invention, in the terminal, the first member is a columnar object having a flange on one side, the second member is a plate having a punched portion having a dimension larger than the cross-sectional shape of the columnar object, and at least the plate And an angle-shaped member composed of a guide bent substantially at a right angle, the columnar part of the columnar object is passed through a hollow portion provided in the magnetic material, and the side opposite to the flange in the first member This is a wire ring part that is fixed by mechanically deforming the end of the columnar part.

  Further, the present invention is a wire ring component in which the vicinity of the joint portion between the first member and the second member after being fixed by the mechanical deformation means is reinforced and joined with solder.

  Further, the present invention is a wire ring component in which the vicinity of the joint portion between the first member and the second member after being fixed by the mechanical deformation means is reinforced and joined with the conductive adhesive. is there.

  Further, the present invention is a wire ring component in which the vicinity of the joint portion between the first member and the second member after being fixed by the mechanical deformation means is reinforced and joined by thermocompression bonding.

  The present invention is the wire ring component in which the hollow portion provided in the magnetic material is circular, square, or substantially circular with a part of the section open to the outside.

  ADVANTAGE OF THE INVENTION According to this invention, the wheel ring component which has the electrode which is reduced in size, ensures mechanical high reliability, and is easy to manufacture can be provided.

  The wire ring component according to the embodiment of the present invention will be described below.

  The wire ring component of the present invention is a wire ring component composed of a plurality of magnetic cores (magnetic material), windings, and terminals, with the terminals at the end of one magnetic core, It is a wire ring component fixed by mechanical means. Here, the said terminal is comprised from the 1st member and the 2nd member.

  There are various combinations of the first member and the second member, which will be described below. In the first example, the first member of the terminal is a columnar object having a flange on one side, and the second member of the terminal is a plate having a portion with a larger dimension than the cross-sectional shape of the columnar object. . The columnar portion of the first member is passed through the hollow portion provided in the magnetic core, and the end of the columnar object opposite to the flange is mechanically crushed to form a terminal.

  In the second example, the first member of the terminal is a cylinder having a flange on one side, and the second member of the terminal is a columnar object having a flange on one side. The cylinder of the first member is penetrated through a hollow portion provided in the magnetic core, and a terminal is formed by mechanically deforming the center of the columnar object on the side having the flange.

  Further, in the third example, the first member of the terminal is a columnar object having a flange on one side, and the second member of the terminal is a plate having a portion with a larger dimension than the cross-sectional shape of the columnar object. And an angle-shaped member composed of at least the surface of the plate and a guide bent substantially at a right angle. The columnar portion of the columnar object of the second member is passed through the hollow portion provided in the magnetic material, and the end of the columnar portion on the side opposite to the flange of the first member is mechanically deformed. To form a terminal.

  Further, in the present invention, for each of the above three examples, for the terminal fixed to the end of the magnetic core by the mechanical means, the vicinity of the joint between the first member and the second member is Reinforcement is joined with solder.

  Further, in the present invention, for each of the above three examples, with respect to the terminal fixed to the end of the magnetic core by the mechanical means, the vicinity of the joint between the first member and the second member is Reinforcing bonding is performed with a conductive adhesive.

  Further, in the present invention, for each of the above three examples, with respect to the terminal fixed to the end of the magnetic core by the mechanical means, the vicinity of the joint between the first member and the second member is Reinforcement is joined by thermocompression bonding.

  Here, the shape of the hollow portion of the magnetic material is suitably a circular shape, a square shape, or a substantially circular shape in which a part of the section is open to the outside. Any shape can be used as long as these members are joined and fixed. FIG. 4 is an explanatory diagram of the shape of the hollow portion of the magnetic material. 4A is a diagram showing a case where the shape of the hollow portion is a circular hollow hole, and FIG. 4B is a diagram showing a case where the shape of the hollow portion is a square hollow hole.

  FIG. 5 is an explanatory diagram of the shape of the hollow portion of the magnetic material, and shows the case where the shape of the hollow portion is a cut hole. As shown in FIGS. 4 and 5, the hollow portion of the magnetic substrate 11 (magnetic material) is shaped like a circular hollow hole 101, a square hollow hole 102, and a hollow hole 103 with a notch. If so, it is convenient for fixing the terminal.

  FIG. 1 is an explanatory diagram of a choke coil according to an embodiment of the present invention. FIG. 1A is an external view of a choke coil, and FIG. 1B is an enlarged view of terminals in the choke coil. A choke coil shown in FIG. 1 includes a magnetic core formed by combining a magnetic substrate 11 and a saddle-shaped core 2, a winding 3 disposed around a middle leg portion 2 a of the saddle-shaped core 2, and The magnetic substrate 11 is composed of terminals 12 mechanically joined to corner portions on both sides of the magnetic substrate 11. Here, the winding lead wire 41 drawn from the winding 3 is wound and electrically connected in the vicinity of the joint portion of the terminal 12.

Example 1
FIG. 2 is an explanatory diagram regarding mechanical joining of the terminals 12 of the choke coil shown in FIG. As shown in FIG. 2, the terminal 12 is composed of a rivet-like component 22 that is a first member and a donut-like disk 21 that is a second member, and is a hollow that is opened at both ends of the magnetic substrate 11. By inserting the rivet-shaped part 22 into the hole and then placing a donut-shaped disk 21 and caulking the tip of the rivet-shaped part 22, both are mechanically joined to form the terminal 12.

(Example 2)
FIG. 3 is an explanatory diagram of another electrode of the choke coil according to the embodiment of the present invention, and is an explanatory diagram regarding mechanical joining of the electrode 12 of the choke coil shown in FIG. As shown in FIG. 3, the terminal includes a rivet-like fitting part 31 that is a first member and a hollow rivet-like part 32 that is a second member.

  Here, the hollow rivet-shaped component 32 is inserted into the hollow holes opened at both ends of the magnetic substrate. Next, a rivet-like fitting part 31 is mounted on the hollow part of the hollow rivet-like part 32, and both ends of the hollow rivet-like part 32 are mechanically caulked to constitute an electrode.

(Example 3)
FIG. 7 is an explanatory diagram of another electrode of the choke coil according to the embodiment of the present invention. FIG. 7 shows only the second member of the electrode. The angled component 71 is provided with angle-shaped members 71a and 71b that are bent substantially at right angles to the surface of the donut-shaped disk around the donut-shaped disk. The angle-shaped members 71a and 71b can prevent the electrode from rotating after mechanical caulking.

Example 4
FIG. 6 is a cross-sectional view showing details of an electrode structure reinforced with another joining member other than mechanical caulking of the electrode of the choke coil. As shown in FIG. 6, the electrode is composed of a rivet-like component 22 that is a first member, a donut-shaped disk 21 that is a second member, and solder 61 that is another joining member. The solder 61 is disposed after mechanically caulking the rivet-shaped part 22 and the donut-shaped disk 21.

  Further, the other bonding member may be a conductive adhesive. Further, the other joining member is such that the Ni layer and the Sn layer applied around the rivet-shaped part 22 and the donut-shaped disk 21 are heat-treated, and the Ni layer and the Sn layer are joined by thermocompression bonding. In this way, reinforcement may be joined.

  The electrode structure of the present invention can constitute an electrode having mechanical reliability and electrical reliability without applying stress to the element body.

Explanatory drawing of the choke coil of the Example of this invention. FIG. 1A is an external view of a choke coil, and FIG. 1B is an enlarged view of terminals of the choke coil. Explanatory drawing of the mechanical joining of the electrode of the choke coil of FIG. Explanatory drawing of the mechanical joining of the other Example of the electrode of a choke coil. Explanatory drawing of the shape of the hollow part of a magnetic material. FIG. 4A shows a case where the hollow portion has a circular hollow hole, and FIG. 4B shows a case where the hollow portion has a square hollow hole. Explanatory drawing of the shape of the hollow part of a magnetic body material, and the figure which shows the case where the shape of a hollow part is a cut hole. Sectional drawing which shows the detail of the electrode structure reinforced with the other joining member of the electrode of the choke coil. Explanatory drawing of the electrode by which the holding plate of the electrode of a choke coil is arrange | positioned. Explanatory drawing of the conventional choke coil. FIG. 8A is an external view of a choke coil, and FIG. 8B is an enlarged view of an electrode of the choke coil. Explanatory drawing of the choke coil which has an electrode of the type formed by plating on a magnetic material base.

Explanation of symbols

2,200 Bowl-shaped core 2a, 200a Middle foot part 3 Winding 41, 410 Winding lead wire 11, 11a, 110 Magnetic substrate 12, 12a, 12b Terminal 21 Donut disk 22 Riveted part 31 Riveted fitting part 32 Hollow rivet-like parts
61 Auxiliary joining material 71 Angled parts 71a, 71b Angle-shaped member 81 Adhesive terminal 91 Plating electrode 101 Circular hollow hole 102 Square hollow hole 103 Hollow hole 500 (Bar-shaped) magnetic substrate

Claims (8)

  In a wire ring component composed of a magnetic material, a winding, and a terminal, the terminal is composed of a first member and a second member, and the first member and the second member are: A wire ring component fixed to the magnetic material by mechanical deformation means.   In the terminal, the first member is a columnar object having a flange on one side, and the second member is a plate having a portion with a larger dimension than the cross-sectional shape of the columnar object. 2. The wire according to claim 1, wherein a columnar portion is passed through a hollow portion provided in the magnetic material, and an end of the columnar object opposite to the flange is mechanically crushed and fixed. Wheel parts.   In the terminal, the first member is a cylinder having a flange on one side, and the second member is a columnar object having a flange on one side, and the cylinder is penetrated by a hollow portion provided in the magnetic material. The wire ring component according to claim 1, wherein the center of the columnar object on the side having the ridge is mechanically deformed and fixed.   In the terminal, the first member is a columnar object having a ridge on one side, and the second member is a plate having a portion with a larger dimension than the cross-sectional shape of the columnar object, and the planar direction of the plate It is an angle-shaped member composed of a guide bent at a substantially right angle, and the columnar part of the columnar object is penetrated through a hollow portion provided in the magnetic material, and the columnar side on the opposite side to the wrinkles in the first member The wire ring component according to claim 1, wherein the end portion of the wire portion is mechanically deformed and fixed.   5. A reinforcing joint is formed by soldering in the vicinity of the joint portion between the first member and the second member fixed by mechanical deformation means. The wire ring component described.   5. The vicinity of the joint between the first member and the second member fixed by mechanical deformation means is reinforced and joined with a conductive adhesive. A wire ring component according to any one of the above.   5. A reinforcing joint is formed by thermocompression bonding in the vicinity of a joint portion between the first member and the second member fixed by mechanical deformation means. Wire ring parts described in 1.   The shape of the hollow portion provided in the magnetic material is any one of a circle, a square, or a substantially circle with a part of the section opened to the outside. The wire ring component described.

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