JPH0718417U - Inductance parts - Google Patents

Abstract

(57) [Summary] [Purpose] In an inductance component that forms a closed magnetic circuit by inserting a drum-type winding core into a rectangular tubular cover core,
An air gap generated between the winding core and the cover core is removed to prevent an increase in magnetic resistance. [Structure] The cover cores 3, 3 formed of flat plates are attached to at least two side surface portions of the drum type winding core 2 to form a closed magnetic path.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an inductance component such as a chip coil and a chip transformer.

[0002]

[Prior art]

 An example of a conventional inductance component is shown in FIGS. 14 and 15. The inductance component 62 is composed of a drum type winding core 57 and a cover core 63. The winding core 57 has square plate-shaped flanges 58 and 59 at both upper and lower ends, and a winding core portion is formed between the upper and lower flanges 58 and 59, and a winding wire 60 is provided. Both ends of the winding are electrically connected to the outside along the side cutouts 61, 61 of the lower flange 59. The cover core 63 has a rectangular tubular shape, and the winding core 57 is inserted into the cylindrical hole of the cover core 63 so that the side surface of the winding core 57 is surrounded by the cover core 63 to form a closed magnetic path.

[0003]

[Problems to be solved by the device]

 However, the conventional inductance component 62 has the following problems. That is, since the winding core 57 is inserted into the cylindrical hole of the cover core 63, the inner diameter of the cylindrical hole of the cover core 63 is determined by the outer dimensions of the upper and lower flanges 58 and 59 of the winding core 57 during the assembly process of the core. There is no choice but to design larger than that, and a gap 64 may not be generated between the cover core 63 and the winding core 57, which may increase the magnetic resistance. That is, this structure is suitable in terms of securing the shielding property at a low cost, but it is difficult to freely set the gap size between the cover core 63 and the winding core 57, and it is possible to reduce the size and the inductance. It was unsuitable from the standpoint of designing an inductance component aiming at realization.

[0004]

[Means for Solving the Problems]

 In order to solve the above-mentioned technical problem, the present invention provides a drum-type core having windings on a core portion having square flat flanges at both ends, and the core. In an inductance component including a cover core attached to a side surface of a core, the cover core is formed of a flat plate made of a magnetic material, and the cover is provided on at least two side surfaces of the winding core. An inductance component characterized in that a closed magnetic circuit is formed by attaching side surfaces of a core. Further, in the above-mentioned inductance component, the side surface of the winding core and the side surface of the cover core in contact with the side surface of the winding core are provided with fitting means for interlocking with each other, or the cover core is a ferrite material. We also supply an inductance component characterized in that the winding core and the cover core are fixed with resin containing magnetic powder.

[0005]

[Action]

 According to the above-mentioned means, since the cover core is not a rectangular cylinder but a flat plate or a shape composed of a flat plate, it is not necessary to design the size of the cover core larger than the outer dimensions of the upper and lower flanges of the winding core. Further, by providing the side surface of the winding core and the side surface of the cover core in contact with the side surface of the winding core with fitting means for interlocking with each other, the position of the cover core with respect to the side surface of the winding core is surely ensured. Decided. If the cover core is made of a ferrite material, or if the winding core and the cover core are fixed with a resin containing magnetic powder, the inductance increases.

[0006]

【Example】

 Embodiments of the inductance component of the present invention will be described below with reference to the drawings. FIG. 1 shows an inductance component 1 according to the first embodiment of the present invention. The inductance component 1 is composed of a drum type winding core 2 made of a magnetic material and a pair of flat plate cover cores 3 made of a magnetic material.

The winding core 2 is the same as the conventional one, and has rectangular flat plate-shaped flanges 4 and 5 at both upper and lower ends, and a winding core portion is formed between the upper and lower flanges 4 and 5 and the winding 6 is provided. To be done. Both ends of the winding 6 are electrically connected to the outside along the side cutouts 7, 7 of the lower flange 5.

The cover cores 3, 3 are a pair of flat plates made of a magnetic material, and have the same height as the distance between the top surface of the upper flange 4 of the winding core 2 and the bottom surface of the lower flange 5. Both ends of the side surfaces of the cover cores 3 and 3 in the height direction are attached to the pair of side surfaces of the upper and lower flanges 4 and 5 of the winding core 2 which face each other.

FIG. 2 shows an inductance component 8 according to a second embodiment of the present invention. In this case, the lower flange 12 of the upper and lower flanges 11 and 12 of the winding core 9 is formed to be longer than the upper flange 11 in the width direction, and the pair of cover cores 10 and 10 includes the upper flange 11 of the winding core 9. It has the same height as the distance from the top surface to the top surface of the lower flange 12. Upper and lower side surfaces and bottom surfaces of the cover cores 10 and 10 are attached to both widthwise ends of the pair of side surfaces of the upper flange 11 of the winding core 9 and the top surface of the lower flange 12 which is directly under the pair of side surfaces.

In both the first and second embodiments, a pair of flat plate cover cores are attached to the pair of opposite side surfaces of the winding core coil. The third embodiment shown in FIG. Like the inductance component 13 described above, if the four flat plate cover cores 15, 15, 15, 15 are attached to all the side surfaces of the winding coil 14, the shielding property can be further maintained.

FIG. 4 shows an inductance component 16 according to a fourth embodiment of the present invention. In this case, the cover core 18 has an L-shape composed of two flat plates, and the inner side surface thereof is attached to the adjacent side surfaces of the core coil 17.

Further, like the inductance component 19 of the fifth embodiment shown in FIG. 5, the inner side surfaces of the pair of L-shaped cover cores 21 and 21 may be attached to all the side surfaces of the winding coil 20. .

FIG. 6 shows an inductance component 22 according to a sixth embodiment of the present invention. In this case, the cover core 24 has a U-shape composed of three flat plates, and the inner side surface thereof is attached to the three adjacent side surfaces of the core coil 23.

Further, like the inductance component 25 of the seventh embodiment shown in FIG. 7, the inner side surfaces of the pair of U-shaped cover cores 27, 27 may be attached to all the side surfaces of the winding coil 26. .

FIG. 8 shows an inductance component 28 according to the eighth embodiment of the present invention. The pair of cover cores 30, 30 each have a convex shape, and a total of two convex portions 33, 33 are fitted between the upper flange 31 and the lower flange 32 on the pair of opposite side surfaces of the core core 29. To do.

FIG. 9 shows an inductance component 34 according to the ninth embodiment of the present invention. A total of four V-shaped convex portions 37, 37, 37, 37 are formed in the height direction on a pair of side surfaces of the upper and lower flanges of the winding core 35 which face each other, and the convex portions 37, 37, 37, 37 are formed. Two V-shaped recesses 38, 38 are formed in the height direction on the side surfaces of the pair of cover cores 36, 36 in contact with the surface on which the V is formed, and they are fitted to each other.

Further, like the inductance component 39 of the tenth embodiment shown in FIG. 10, a total of four V-shaped recesses 42, 42 are formed in the depth direction of a pair of side surfaces of the upper and lower flanges of the core coil 40 which face each other. , 42, 42, and a total of four convex portions 43, 43, 43, 43 in the depth direction of the side surfaces of the pair of cover cores 41, 41 contacting the surface on which the concave portions 42, 42, 42, 42 are formed. May be formed so as to be fitted to each other.

FIG. 11 shows an inductance component 44 according to the eleventh embodiment of the present invention. A total of four conical protrusions 47, 47, 47, 47 are formed on a pair of opposing side surfaces of the upper and lower flanges of the winding core 45, and the surface on which the conical protrusions 47, 47, 47, 47 are formed. A total of four conical holes 48, 48, 48, 48 are formed on the side surfaces of the pair of cover cores 46, 46 in contact with each other and are fitted into each other.

FIG. 12 shows an inductance component 49 according to the twelfth embodiment of the present invention. The cover core 51 is L-shaped, and a rectangular parallelepiped convex portion 52 is formed at an inner corner thereof, and the convex portion 52 is fitted between the upper and lower flanges of the winding core 50.

Further, like the inductance component 53 of the thirteenth embodiment shown in FIG. 13, a rectangular parallelepiped convex portion 56 is formed on the central surface of the U-shaped cover core 55, and the convex portion 56 is located between the upper and lower flanges. May be fitted to.

In the eighth, ninth, tenth, eleventh, twelfth, and thirteenth embodiments described above, cover cores are attached to two side surfaces or three side surfaces of the core coil. However, as in the third, fifth, and seventh embodiments, if a cover core having fitting means for the core coil is provided on all four side surfaces of the core coil, the shield property can be further maintained.

If the cover core is made of a ferrite material or if the winding core and the cover core are fixed with a resin containing magnetic powder, a larger inductance can be obtained.

[0023]

[Effect of device]

 As described above, according to the present invention, since the cover core is not a rectangular cylinder but a flat plate or a flat plate, it is not necessary to design the cover core larger than the outer dimensions of the upper and lower flanges of the core. Instead, the gap between the cover core and the winding core can be freely controlled by a gap sheet or the like. Also, as an example, it is possible to make the distance as close as possible to 0, reduce the magnetic resistance, and obtain a large amount of inductance with a small number of turns. Therefore, it is possible to downsize the components and increase the inductance. . In addition, the drum-shaped core, which can be manufactured at low cost, is used as the base material, so the total cost can be suppressed.

Further, when a fitting means for engaging with each other is provided on the side surface portion of the core core and the side surface of the cover core which is in contact with the side surface portion of the core core, the cover core is attached to the side surface of the core core. Since the position is determined with certainty, variations in the external dimensions of components and the magnitude of the inductance generated by forming a closed magnetic circuit are reduced, and the process of adjusting the external dimensions can be omitted, and costs can be reduced. If the cover core is made of a ferrite material, or if the winding core and the cover core are fixed to each other with a resin containing magnetic powder, the inductance increases, and the miniaturization of the component and the increase of the inductance become more reliable.

[Brief description of drawings]

FIG. 1 is a perspective view showing an inductance component according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing an inductance component according to a second embodiment of the present invention.

FIG. 3 is a perspective view showing an inductance component according to a third embodiment of the present invention.

FIG. 4 is a perspective view showing an inductance component according to a fourth embodiment of the present invention.

FIG. 5 is a perspective view showing an inductance component according to a fifth embodiment of the present invention.

FIG. 6 is a perspective view showing an inductance component according to a sixth embodiment of the present invention.

FIG. 7 is a perspective view showing an inductance component according to a seventh embodiment of the present invention.

FIG. 8 is a perspective view showing an inductance component according to an eighth embodiment of the present invention.

FIG. 9 is a perspective view showing an inductance component according to a ninth embodiment of the present invention.

FIG. 10 is a perspective view showing an inductance component according to a tenth embodiment of the present invention.

FIG. 11 is an exploded perspective view showing an inductance component according to an eleventh embodiment of the present invention.

FIG. 12 is an exploded perspective view showing an inductance component according to a twelfth embodiment of the present invention.

FIG. 13 is an exploded perspective view showing an inductance component according to a thirteenth embodiment of the present invention.

FIG. 14 is a perspective view showing a conventional core coil.

FIG. 15 is a perspective view showing a conventional inductance component.

[Explanation of symbols]

 1 Inductance component 2 Winding core 3,3 Cover core 4 Upper flange 5 Lower flange 6 Winding 7,7 Notch

Claims (4)

[Scope of utility model registration request] 1. A drum core core having rectangular flat plate-shaped flanges at both ends, and a winding core located between the flanges and having windings, and a side surface of the core core. A cover core, the cover core is formed of a flat plate made of a magnetic material, and a side surface of the cover core is attached to at least two side surface portions of the winding core to form a closed magnetic circuit. An inductance component characterized by being formed. 2. A utility model registration characterized in that one or more fitting means for engaging with each other are provided on the side surface of the winding core and the side surface of the cover core in contact with the side surface of the winding core. The inductance component according to claim 1. 3. The inductance component according to claim 1, wherein the cover core is made of a ferrite material. 4. A utility model registration claim characterized in that the winding core and the cover core are fixed with a resin containing magnetic powder.
Inductance component described in the paragraph.