JP2011113995A - Core insulating case and coil component - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a core insulating case that is unlikely to deform, has a superior outward appearance since a toroidal core stored therein is unlikely to be exposed, is free of a risk of damage to a wound copper wire, and has superior electric insulation; and to provide a coil component. <P>SOLUTION: The core insulating case includes a case portion 10 in which the toroidal core 1 is stored and a cover portion 11 engaged with the case portion 10, wherein the case portion 10 includes an outer peripheral cylindrical portion 21, an inner peripheral cylindrical portion 22, and an annular bottom portion 23 formed between lower ends of the outer peripheral cylindrical portion 21 and inner peripheral cylindrical portion 22. The cover portion 11 has an annular shape and is engaged by a claw portion 16 provided at an outer peripheral portion of the cover portion 11 and a receiving portion 12 provided at an upper end of the outer peripheral cylindrical portion 21 of the case portion 10, a projection portion 13 having a spring property for applying pressing force to the toroidal core being formed inside the cover portion 11. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a core insulating case and a coil component that house a toroidal core of a coil component used in an electronic circuit or the like.

  In an electronic circuit or the like, a coil component obtained by winding a toroidal core as a noise removing element such as an inductance element or a choke coil is used. Conventionally, when winding a toroidal core, in order to ensure electrical insulation between the toroidal core and the winding, either apply an electrically insulating coating on the surface of the toroidal core or store the toroidal core in a core insulation case. And was winding. The method of winding in a core insulating case and winding has advantages that the process can be easily performed and the electrical insulation is superior to the method of applying an electrical insulating paint, and an example thereof is shown in Patent Document 1. ing.

  7 and 8 are views showing an example of a conventional core insulation case, FIG. 7 is an external perspective view, and FIG. 8 is an exploded perspective view. As shown in FIGS. 7 and 8, the conventional core insulation case includes two toroidal cores 1 that are wrapped around the toroidal core 1 from above and below and are abutted near the center (butting portion 7) of the thickness (height) of the toroidal core. It consists of bottom double cylinders 2 and 3. The bottomed double cylinders 2 and 3 each form a toroidal core storage space with the outer peripheral cylindrical part 4, the inner peripheral cylindrical part 5, and the annular bottom part 6 formed between one ends thereof.

  When the toroidal core 1 is inserted into the respective core storage spaces of the bottomed double cylinders 2 and 3, the toroidal core 1 is prevented from falling off the bottomed double cylinders 2 and 3, and the toroidal core 1 In order to prevent rattling, the outer cylindrical portion 4 is formed to be elastically deformable in the radial direction by the slit 8 provided in the circumferential direction on the bottom portion 6, and the outer cylindrical portion 4 of the portion where the slit 8 is provided. The convex portion 9 provided on the inner side is configured to hold the toroidal core 1 by pressing the outer peripheral surface of the toroidal core 1 in the radial direction.

JP 2002-222715 A

  In the conventional core insulation case, the slit 8 is provided to press the outer peripheral surface of the toroidal core 1 in the radial direction as shown in FIGS. 7 and 8, but the toroidal core 1 is exposed from the slit 8. There was a defect in appearance. Further, there is a problem that the outer cylindrical portion 4 is elastically deformed, so that the bottomed double cylindrical bodies 2 and 3 are deformed and are not preferable in appearance.

  Further, in the conventional core insulation case, a gap may be generated in the butted portions 7 of the two bottomed double cylindrical bodies 2 and 3 that are butted from above and below due to variations in the thickness dimension of the toroidal core 1. There was a defect in appearance that the toroidal core 1 was exposed.

  Moreover, when the toroidal core 1 is exposed from the slit 8 or the gap as described above, the copper wire is indented when the copper wire used for the winding is thick, and the toroidal core 1 and the copper wire are in contact with each other. Copper wire could be damaged. In addition, since the toroidal core is not an insulator, there is a problem that the electrical insulation characteristics deteriorate when the copper wire directly contacts the toroidal core.

  Therefore, the object of the present invention is to reduce the cost, because it is difficult to deform and the appearance of the accommodated toroidal core is difficult to be exposed, and there is no risk of causing scratches on the copper wire of the winding, and it has excellent electrical insulation. It is to provide a simple core insulation case and coil component.

  In order to solve the above problems, the core insulation case of the present invention is a core insulation case for housing a toroidal core, and is fitted to the case portion and the case portion for housing the toroidal core inside And the case portion includes an outer cylindrical portion, an inner peripheral cylindrical portion, and an annular bottom portion formed between the outer peripheral cylindrical portion and a lower end of the inner peripheral cylindrical portion. Has an annular shape, is formed so as to be fitted to the upper end of the case portion, and provided with a portion that fits to at least a portion of the upper end of the case portion and at least a portion of the lid portion, At least one or more projecting portions having a spring property for applying pressure to the toroidal core are formed inside the lid portion.

  Here, it is preferable that a plurality of the projecting portions having the spring property are provided, and the projecting portions are arranged symmetrically with respect to the annular center of the lid portion.

  In addition, the mating portions project in the inner circumferential direction provided at the upper end of the outer circumferential cylindrical portion of the case portion and the claw portion projecting in the outer circumferential direction provided in the outer circumferential portion of the lid portion. Or a claw portion projecting in the inner circumferential direction provided on the inner circumferential portion of the lid portion and a receiving portion projecting in the outer circumferential direction provided on the upper end of the inner circumferential cylindrical portion of the case portion fitted to the claw portion. It is desirable to include.

  In this case, the claw portion protruding in the outer peripheral direction provided on the outer peripheral portion of the lid portion or the claw portion protruding in the inner peripheral direction provided on the inner peripheral portion of the lid portion is the protruding portion having the spring property. May be provided in a portion other than the outer periphery or the inner periphery of the portion provided with.

  Further, at least one of a claw part projecting in the outer peripheral direction provided on the outer peripheral part of the lid part and a receiving part projecting in the inner peripheral direction provided on the upper end of the outer peripheral cylindrical part of the case part fitted thereto, or At least one of the claw portion protruding in the inner peripheral direction provided in the inner peripheral portion of the lid portion and the receiving portion protruding in the outer peripheral direction provided in the upper end of the inner peripheral cylindrical portion of the case portion fitted to the outer peripheral portion is an outer periphery. Alternatively, it may be formed over the entire inner circumference.

  In addition, the part that fits to each other includes a downward convex part provided on the inner peripheral part of the lid part and a concave part provided on the upper end of the inner peripheral cylindrical part of the case part fitted thereto, or You may include the convex part of the downward direction provided in the outer peripheral part of the cover part, and the recessed part provided in the upper end of the outer peripheral cylindrical part of the said case part fitted to this.

  In this case, a downward convex portion provided on the inner peripheral portion of the lid portion and a concave portion provided on the upper end of the inner peripheral cylindrical portion of the case portion fitted thereto, or provided on the outer peripheral portion of the lid portion. It is desirable that the downward convex portion and the concave portion provided at the upper end of the outer peripheral cylindrical portion of the case portion fitted thereto are formed over the entire outer periphery or inner periphery.

  Further, it is desirable that the toroidal core is not exposed in a state where the toroidal core is housed.

  Moreover, the protrusion part which has the spring property of the said cover part is plate shape, and the protrusion height may be 1.5 mm or more.

  Moreover, according to this invention, the coil components using said core insulation case are obtained.

  In the present invention, as described above, there is a claw portion protruding outward on the edge of the lid portion so that the toroidal core is not exposed, and by providing a convex portion that fits the claw portion at the upper end of the case portion, The toroidal core can be prevented from being exposed. Further, since the toroidal core 1 is not exposed, the copper wire can be prevented from being damaged during winding.

  Also, in order to prevent the core insulation case from being deformed and to prevent rattling of the toroidal core in the core insulation case, there is a protrusion on the inside of the lid portion, thereby holding the toroidal core from above It has become. The effect can be further enhanced by providing a plurality of the projecting portions and arranging them symmetrically with respect to the center.

  As described above, according to the present invention, it is difficult to deform and the appearance of the housed toroidal core is difficult to be exposed, and there is no fear of generating scratches on the copper wire of the winding, and the electrical insulation is excellent. An inexpensive core insulation case and coil component can be obtained.

The external appearance perspective view which shows one Embodiment of the core insulation case by this invention. The disassembled perspective view which shows one Embodiment of the core insulation case by this invention. Sectional drawing which shows one Embodiment of the core insulation case by this invention. Sectional drawing of the case part used for the core insulation case of this Embodiment. Explanatory drawing of the cover part used for the core insulation case of this Embodiment. FIG. 5A is a side view, and FIG. 5B is a bottom view. The expanded sectional view of the cover part used for the core insulation case of this Embodiment. The external appearance perspective view which shows an example of the conventional core insulation case. The disassembled perspective view which shows an example of the conventional core insulation case.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  1 to 3 are views showing an embodiment of a core insulation case according to the present invention. FIG. 1 is an external perspective view, FIG. 2 is an exploded perspective view, and FIG. 3 is a sectional view. 4 is a cross-sectional view of the case portion used in the core insulating case of the present embodiment, FIG. 5 is an explanatory view of the lid portion, FIG. 5 (a) is a side view, FIG. 5 (b) is a bottom view, FIG. 6 is an enlarged cross-sectional view of the lid portion.

  As shown in FIGS. 1 and 2, the core insulation case of the present embodiment is a core insulation case for housing the toroidal core 1, and a case portion 10 and a case for housing the toroidal core 1 inside. As shown in FIG. 4, the case portion 10 includes an outer peripheral cylindrical portion 21, an inner peripheral cylindrical portion 22 inside thereof, and an outer peripheral cylindrical portion 21 and an inner peripheral cylindrical portion 22. 5 and 6, the lid portion 11 has an annular shape and is formed so as to be fitted to the upper end of the case portion 10. As shown in FIGS. 3 to 6, the upper end of the case portion 10 and the outer peripheral portion and the inner peripheral portion of the lid portion 11 are provided with portions that are fitted to each other. There are 4 protrusions 13 having spring properties for applying pressure. It is formed. Here, the four protrusions 13 are arranged symmetrically with respect to the annular center of the lid part 11.

  Further, the above-mentioned fitting portions are the inner circumferential direction provided at the upper end of the outer circumferential cylindrical portion 21 of the claw portion 16 projecting in the outer circumferential direction provided on the outer circumferential portion of the lid portion 11 and the case portion 10 fitted thereto. From the convex receiving portion 12 projecting to the bottom, the downward convex portion 15 provided on the inner peripheral portion of the lid portion 11, and the concave portion 14 provided on the upper end of the inner peripheral cylindrical portion 22 of the case portion 10 fitted thereto. It has become.

  Further, in the present embodiment, as shown in FIG. 5, the claw portion 16 that protrudes in the outer peripheral direction provided on the outer peripheral portion of the lid portion 11 is provided in a portion other than the outer periphery of the portion where the protruding portion 13 is provided. It has been. This is for facilitating manufacture when the lid portion 11 is integrally molded using a mold. As shown in FIG. 2, the receiving portion 12 at the upper end of the outer peripheral cylindrical portion 21 of the case portion 10 is formed over the entire outer periphery.

  Further, as shown in FIG. 2, the downward convex portion 15 provided on the inner peripheral portion of the lid portion 11 and the concave portion 14 provided on the upper end of the inner peripheral cylindrical portion 22 of the case portion 10 fitted thereto are It is formed over the entire circumference.

  As described above, the receiving portion 12 of the case portion 10 of the core insulating case of the present embodiment is provided on the entire outer periphery so that the lid portion 11 does not easily fall off due to stress during winding. Further, the receiving portion 12 is on the entire outer periphery, and the downward convex portion 15 provided on the inner peripheral portion of the lid portion 11 and the concave portion provided on the upper end of the inner peripheral cylindrical portion 22 of the case portion 10 fitted thereto. Since 14 is formed over the entire inner circumference, the toroidal core 1 is not exposed in appearance.

  As shown in FIG. 5, the lid portion 11 is provided with four protrusions 13 but is formed in four directions symmetrical to the center in order to stably hold the toroidal core. In addition, the claw portion 16 is preferably located on the entire outer periphery so that it does not easily fall off due to stress during winding, but the claw portion 16 of the lid portion 11 is formed by the protrusion 13 in order to have a structure that can be integrally molded. It is provided in a part other than the outer periphery of the part which is made.

  The core insulation case of this Embodiment inserts the toroidal core 1 in the case part 10 as shown in FIGS. 1-3, and fits the cover part 11 from an upper direction. As a result, it is possible to secure the electrical insulation between the toroidal core and the winding and to apply the winding.

  Next, a specific example of the core insulation case of the above embodiment will be described. For example, PP (polypropylene) resin can be used as the material of the case portion 10 and the lid portion 11 shown in FIG. 1, and other materials can be used as long as the electrical insulation properties, heat resistance, and spring properties are equivalent. The outer shape of the core insulating case including the lid and the case portion varies depending on the shape of the toroidal core to be housed. In general, the outer diameter is about 5 to 40 mm, the inner diameter is about 2 to 20 mm, and the thickness (height) is 5. About 30 mm.

  Further, the height of the protrusion 13 of the lid 11 shown in FIG. 3 can be about 1.5 mm. In this case, if the tolerance of the thickness of the toroidal core 1 is within a range of ± 0.5 mm, the protrusion It becomes possible to always hold down the toroidal core 1 from the thickness direction by utilizing the spring property of the portion 13. Moreover, the press of the grade which does not deform | transform a core insulation case also in appearance is obtained. Note that the height of the protrusion 13 can be selected to an optimum value depending on the shape of the toroidal core and the core insulating case, the accuracy of the thickness of the toroidal core, and the like.

  As described above, according to the present invention, it is possible to prevent the core insulating case from being deformed, and to obtain an inexpensive core insulating case and coil component that are excellent in appearance and excellent in electrical insulation.

  Needless to say, the present invention is not limited to the above-described embodiment, and the design and the like of the shape and material of each part can be changed according to the purpose and application. For example, in the above-described embodiment, the portions that fit together are the inner periphery provided at the upper end of the outer peripheral cylindrical portion of the claw portion protruding in the outer peripheral direction provided on the outer peripheral portion of the lid portion and the case portion fitted therein. Consists of a convex receiving portion projecting in the direction, a downward convex portion provided on the inner peripheral portion of the lid portion, and a concave portion provided on the upper end of the inner peripheral cylindrical portion of the case portion fitted thereto, A claw part is provided on the inner peripheral part of the lid part, a receiving part is provided on the inner peripheral cylindrical part of the case part, a downward convex part is provided on the outer peripheral part of the cover part, and a concave part is provided on the outer peripheral cylindrical part of the case part. Also good. It is also possible to increase or decrease the number of protrusions that hold the toroidal core, and it is also possible to provide claw portions on the entire outer periphery of the lid portion by devising a method for manufacturing the lid portion. Further, the claw portion and the receiving portion can be formed on a part or the whole of both the inner periphery and the outer periphery of the lid portion and the case portion. Furthermore, the form of the part in which the case part and the lid part are fitted to each other is also possible other than the claw part and the receiving part as in the above embodiment. Further, depending on the purpose, it is possible to provide a hole or the like for confirming the stored toroidal core in a portion that does not affect the appearance or the winding.

DESCRIPTION OF SYMBOLS 1 Toroidal core 2, 3 Bottomed double cylindrical body 4, 21 Outer cylindrical part 5, 22 Inner cylindrical part 6, 23 Bottom part 7 Abutting part 8 Slit 9 Protruding part 10 Case part 11 Lid part 12 Receiving part 13 Protruding part 14 Concave part 15 Convex part 16 Claw part

Claims (10)

  A core insulation case for housing a toroidal core, comprising a case portion for housing the toroidal core inside and a lid portion fitted to the case portion, the case portion comprising an outer cylindrical portion, an inner peripheral portion It consists of a cylindrical part and an annular bottom formed between the outer peripheral cylindrical part and the lower end of the inner peripheral cylindrical part, and the lid part has an annular shape and is fitted to the upper end of the case part A part for fitting to at least a part of the upper end of the case part and at least a part of the lid part, and a spring for applying pressure to the toroidal core inside the lid part A core insulating case, wherein at least one projecting portion having a property is formed.   The core insulating case according to claim 1, wherein the core insulating case has a plurality of the projecting portions having spring properties, and the projecting portions are arranged symmetrically with respect to the annular center of the lid portion.   The portions that are fitted to each other are projected in an inner circumferential direction provided at an upper end of an outer peripheral cylindrical portion of the case portion that is fitted to the claw portion and the claw portion that is fitted to the claw portion. Projecting in the outer circumferential direction provided at the upper end of the inner circumferential cylindrical portion of the case portion and the claw portion projecting in the inner circumferential direction provided in the inner circumferential portion of the receiving portion or the lid portion The core insulating case according to claim 1, further comprising a receiving portion.   The claw portion protruding in the outer peripheral direction provided on the outer peripheral portion of the lid portion or the claw portion protruding in the inner peripheral direction provided on the inner peripheral portion of the lid portion is provided with the projection portion having the spring property. The core insulation case according to claim 3, wherein the core insulation case is provided on a portion other than the outer periphery or inner periphery of the portion.   At least one of a claw portion extending in the outer peripheral direction provided on the outer peripheral portion of the lid portion and a receiving portion protruding in the inner peripheral direction provided at the upper end of the outer peripheral cylindrical portion of the case portion fitted to the claw portion, or At least one of a claw portion extending in the inner peripheral direction provided on the inner peripheral portion of the lid portion and a receiving portion protruding in the outer peripheral direction provided on the upper end of the inner peripheral cylindrical portion of the case portion fitted to the claw portion is The core insulation case according to claim 3, wherein the core insulation case is formed over the entire outer periphery or inner periphery.   The part that fits together includes a downward convex part provided on the inner peripheral part of the lid part and a concave part provided on the upper end of the inner peripheral cylindrical part of the case part fitted to the convex part, or The lower convex part provided in the outer peripheral part of the cover part and the concave part provided in the upper end of the outer peripheral cylindrical part of the said case part fitted to this convex part are included, The any one of Claims 1-5 characterized by the above-mentioned. The core insulation case as described in the item.   A downward convex portion provided on the inner peripheral portion of the lid portion and a concave portion provided on the upper end of the inner peripheral cylindrical portion of the case portion fitted to the convex portion, or a lower portion provided on the outer peripheral portion of the lid portion The core insulation according to claim 6, wherein the convex portion in the direction and the concave portion provided at the upper end of the outer cylindrical portion of the case portion fitted to the convex portion are formed over the entire outer circumference or inner circumference. Case.   The core insulating case according to claim 1, wherein the toroidal core is configured not to be exposed in a state in which the toroidal core is housed.   The core insulating case according to any one of claims 1 to 8, wherein the protrusion portion having a spring property of the lid portion has a plate shape, and a protruding height thereof is 1.5 mm or more.   A coil component using the core insulation case according to any one of claims 1 to 9.

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