JPH02298005A - Magnetic component - Google Patents

Abstract

PURPOSE:To attach components to a support parent body surely so as to comply with a size and a heat-dissipating operation and to satisfactorily relax and external vibration in a state attached to the support parent body by a method wherein a magnetic component is manufactured in a state that a leg body is installed at a magnetic core and the magnetic core is united to the leg body. CONSTITUTION:Leg bodies 13, 13 are formed collectively at lower parts on both sides of an insulating case 12 in such a way that they are opened toward the lower part and are inclined. Split bodies 12a, 12b which are split into two parts by using the center in a thickness direction of the magnetic core 11 as a split point are combined with the insulating case; the individual split bodies 12a, 12b are provided respectively with ring-shaped parts surrounding the magnetic core 11 and with leg parts. Pins 14, 14 made of a metal are attached to central parts at lower ends of the leg bodies 13, 13 formed at the insulating case 12 so as to be faced downward; a conductor 15 is wound on a ring-shaped part of the insulating case 12; leads 15a are formed at both ends of the conductor 15; a magnetic component is constituted. Then, this component is attached to a circuit board 16.

Description

DETAILED DESCRIPTION OF THE INVENTION CObject of the Invention] (Field of Industrial Application) The present invention relates to a magnetic component used, for example, as an inductance element.

(Prior Art) An inductance element incorporated in an electronic circuit, for example, as a switch coil for a switch power supply, is made by winding a conductor around a ring-shaped magnetic core, and is attached to a supporting member such as a circuit board. .

This inductance element is also incorporated in devices that are subject to vibrations, such as those installed in the electronic circuits of automobiles, and when the inductance element is incorporated into devices that are subject to vibrations, care must be taken to ensure that the windings do not break due to vibration. It is required that the element be mounted on a support base with vibration resistance.

Conventionally, in order to provide an inductance element with vibration resistance and to attach it to a supporting body, a structure has been adopted in which the element is supported by a box-shaped pedestal as shown in FIG. 16. That is, in the figure, reference numeral 1 denotes an annular magnetic core whose entire surface is covered with an insulating material 2, and a conductive wire 2 is wound around this magnetic core 1 to constitute an inductance element. Reference numeral 4 denotes a box-shaped pedestal made of insulating material with an open upper surface, and a bottle 5 protrudes downward from the lower surface. The magnetic core 1 is placed on the pedestal 4, fitted, and fixed with an adhesive 7. The lead 3a of the conductor 3 is connected to the pedestal 4
Penetrates the lower surface of and leads downward.

Then, the pedestal 4 is placed on, for example, a circuit board 6, and the pedestal 4 is
The bottle 5 and the lead 3a of the conductive wire 3 are passed through the circuit board 6 and soldered using a solder solder.

According to this structure, the box-shaped pedestal 4 stably supports the inductance element, and vibrations applied from the outside can be alleviated.

However, on the other hand, since the pedestal 4 is fitted later to the already manufactured inductance element, the support of the magnetic core 1 by the pedestal 4 becomes unstable due to variations in the manufacturing dimensions of the magnetic core 1, and external vibrations cause the magnetic core 1 to may vibrate and break the lead 3a. Furthermore, since the lower part of the inductance element is surrounded by the box-shaped pedestal 4, the heat dissipation effect is poor, and the adhesive that fixes the element and the pedestal peels off due to thermal contraction due to heat generation of the element, making it difficult to support the element. It may become unstable and vibrate.

(Problems to be Solved by the Invention) In this conventional mounting structure, the support of the inductance element by the pedestal becomes unstable due to variations in the dimensions of the inductance element and heat radiation, and the element vibrates due to external vibration. There is a problem that disconnection occurs.

The present invention has been made based on the above-mentioned circumstances, and an object of the present invention is to provide a magnetic component that can be reliably attached to a supporting body while taking into account dimensions and heat radiation, and that can satisfactorily alleviate external vibrations while being attached to the supporting body. do.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the magnetic component of the present invention comprises a ring-shaped magnetic core, a conducting wire wound around the magnetic core, and legs provided on the magnetic core. It is characterized by comprising a body.

(Function) The magnetic parts are manufactured with the legs provided on the magnetic core, and the magnetic core and the legs are integrated. It also has a good heat dissipation effect on the magnetic core, and the legs can reliably attach the magnetic core regardless of the heat generated by the magnetic core.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

1 to 10 show embodiments in which legs are formed in an insulating material covering a magnetic core.

1 to 4 show one embodiment thereof.

In the figure, reference numeral 11 denotes an annular magnetic core, which is formed by winding an amorphous magnetic alloy ribbon or a silicon steel ribbon. Reference numeral 12 denotes an insulating case made of an insulating synthetic resin such as polybutylene terephthalate that covers the entire surface of the magnetic core 11. At the bottom of both sides of the insulating case 12, legs 13. It is integrally formed with an incline. The insulating case is constructed by combining divided bodies 12a and 12b which are divided into two parts with the center of the thickness direction of the magnetic core 11 as a dividing point, and each divided body 12a and 12b has an annular part surrounding the magnetic core 11 and a leg part. They each have their own. Note that the means for combining and joining the divided bodies 12a and 12b include fitting, adhesive, screwing, and the like. A silicone material is interposed between the insulating case 12 and the magnetic core 11, or an adhesive is filled to fix the two. In addition, the legs 13.13 formed on the insulating case 12
Metal barrel bottles 14 and 14 are mounted at the center of the lower end of each with the metal barrel facing downward. The conductor 1 is attached to the annular part of the insulating case 12.
5 is wound around the conductor 15, and leads 15a are attached to both ends of the conductor 15.
is formed.

The magnetic component, that is, the inductance element constructed in this manner is attached to a circuit board 16, for example, as shown in FIG. That is, the inductance element is connected to the circuit board 1.
6, the metal bottle 14.14 is inserted into the hole 17.17 formed in the circuit board 16, the lower end of the leg 13.13 is brought into contact with the upper surface of the circuit board 16, and the metal bottle 14.14 is placed in the hole 17.17. The metal bottle 14.14 is fixed by soldering using a solder solder 18 between the tip of the metal bottle 14.14 inserted into the circuit board 16 and the circuit pattern formed on the lower surface of the circuit board 16.

Further, the lead 15a of the conductive wire 15 is inserted into a hole 19 formed in the circuit board 16 and fixed by soldering using a solder solder 18.

By attaching the inductance element to the circuit board 16 in this manner, the leg body 13 is formed integrally with the insulating case 12, so that the leg body 13 can attach the inductance element without being affected by variations in the dimensions of the magnetic core 11. can be supported reliably. Further, since the legs 13 do not cover the magnetic core 11 and are open, they do not block the dissipation of heat generated from the magnetic core 11, and the heat dissipation effect for the inductance element is good.

FIG. 5 shows an example of the application of the legs, in which the legs 13 and 13 formed on the insulating case 12 are horizontally connected, and this connection is brought into contact with the top surface of the circuit board 16 to further stabilize the inductance element. can be supported.

6 and 7 show a structure in which an inverted T-shaped leg 13 is formed at the center of the lower part of the magnetic core 11, and the magnetic core 11 is supported using this leg 13.

8 to 10 show a structure in which the inductance element is mounted horizontally. That is, in the embodiments described so far, the inductance element is mounted vertically, but here the inductance element is mounted horizontally. For this purpose, a plurality of legs 13 are formed radially on one side of the insulating case 12, and the legs 13 are used to support the magnetic core 11 arranged horizontally.

The structure in which the legs are provided on the side of the magnetic core 11 is not limited to the embodiments described above. The embodiment shown in FIGS. 11 and 12 shows a structure in which a separately formed leg 13 is fixed to the magnetic core 11 using a conducting wire 13 wound around the magnetic core 11.

Further, the leg body 13 is not limited to being fixed with a conductive wire, but may be fixed to the magnetic core by means such as adhesive bonding or screwing.

Further, when the magnetic core 11 is manufactured as a ferrite magnetic core, that is, a powder magnetic core, it is also possible to form the legs 13.13 integrally with the reef body 11 as shown in FIG.

Note that the shape of the legs is not limited to the embodiments described above.

14 and 15 show the legs 13 of the insulating case 12 in the parts of the embodiment shown in FIGS. 1 to 4.
13 is vertically formed facing downward. In this embodiment, on both sides of the legs 13.13 *1
3a and 13a are formed. This groove 13a is
The lead 15a of No. 5 is fitted to stabilize the lead 15a.

This lead groove 15a is not limited to this embodiment;
Legs 1 of the insulating case 12 of the embodiment shown in the figures to FIG.
Applicable to 3.

"Effects of the Invention" As explained above, according to the magnetic component of the present invention, the magnetic core,
Since the structure integrates the legs and the conductor, by fixing the legs to the support base, the legs reliably support the magnetic core without being affected by variations in the dimensions of the magnetic core or the heat radiation of the magnetic core. Excellent vibration resistance can be provided because the legs dampen the vibration and prevent it from acting on the magnetic core, thereby preventing disconnection of the conductor. Further, by providing a groove for fixing the conducting wire in the leg body and fixing the lead of the conducting wire in this groove, the conducting wire can be stably and safely fixed.

[Brief explanation of drawings]

1 to 4 are explanatory diagrams showing a first embodiment of the magnetic component of the present invention, FIG. 5 is an explanatory diagram showing a second embodiment, and FIGS. 6 and 7 are explanatory diagrams showing a third embodiment. FIGS. 8 to 10 are explanatory diagrams showing the fourth embodiment. FIGS. 11 and 12 are explanatory diagrams showing the fifth embodiment. FIG. 13 is an explanatory diagram showing the sixth embodiment. FIG. 14 and FIG. 15 are explanatory diagrams showing the seventh embodiment, and FIG. 16 is an explanatory diagram showing a conventional example. 11... Magnetic core, 12... Insulating case, 13... Leg body, 15... Winding wire. Patent attorney Takehiko Suzue Figure 1 Figure 2 Figure 3 Figure 14 Figure 1!5 Figure 6 To Figure 1 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13 Figure 16 1'1 Go 4 Figure 14 Figure 115 - 12 3a 3a

Claims (2)

[Claims] (1) A magnetic component comprising a ring-shaped magnetic core, a conducting wire wound around the magnetic core, and legs provided on the magnetic core. (2) The magnetic component according to claim 1, wherein the legs are provided with grooves for fixing conductive wires.