JP2008218465A - Coil part - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coil part in which short circuit between coil members can be prevented even if an excessive vibration or shock is applied to the coil members. <P>SOLUTION: A coil part 100 is provided with a core 30 consisting of an insulative bobbin 10 having a cylindrical main body 11, a coil body 20 wound around the main body 11 and core portions 30a, 30b provided so as to sandwich the coil body 20. The coil body 20 consists of plate-like coil members 40, 50, 60 laminated separately from one another and connected in series, portions of the core members 40-60 which protrude from the core 30 are folded in the laminating direction of the coil members 40-60, and the bobbin 10 has edge abutting surfaces 11d, 11e allowing inner edge portions 44a, 64a of folded portions 44, 64 in the coil members 40, 60 on both the ends in the laminating direction of the coil body 20 to abut. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a coil component.

In an automobile or the like, an electronic device such as a DC-DC converter is mounted in order to convert a high voltage into a low voltage, and a coil component is used in such an electronic device. As such a coil component, the thing of the following patent document 1 is known conventionally. The coil component described in Patent Document 1 below has a pair of cores and a coil body sandwiched between the pair of cores, and the coil body includes a plate-like first coil member and a second coil member wound in series. The first coil member and the second coil member are stacked while being connected while being rotated, and the first coil member and the second coil member are stacked via an insulating member in a part of the region. ing. And the part which protrudes outside the core among the 1st coil member and the 2nd coil member is bent to the lamination direction side of the 1st coil member and the 2nd coil member. Thereby, size reduction of a coil component is achieved. Note that the bent portions are joined to each other on one outer side of the core, and the bent portions are not joined to each other on the other outer side.
JP 2003-272936 A

  However, in the coil component described in Patent Document 1, the first coil member and the second coil member are laminated via an insulating member in a part of the region, but the bent portions are disposed on one outer side of the core. Are not joined together. Therefore, when an excessive impact or vibration is applied to the coil component in the stacking direction of the first coil member and the second coil member, the bent portions may come into contact with each other and short-circuit.

  This invention is made | formed in view of the said situation, and it aims at providing the coil components which can suppress the short circuit between coil members, even if an excessive vibration and impact are added.

  In order to solve the above problems, the present invention provides an insulating bobbin having a cylindrical bobbin main body, a coil body wound around the bobbin main body of the insulating bobbin, and sandwiching the coil body. The coil body is composed of a plurality of plate-like coil members that are stacked apart from each other and connected in series. Of these, the portion protruding from the core is bent toward the lamination direction of the coil member, and the insulating bobbin is a bent portion of at least one of the coil members at both ends in the lamination direction of the coil body. It is a coil component which has an edge contact surface which contacts an inner edge part.

  According to this coil component, even if an excessive impact or vibration is applied to the plurality of coil members with respect to the bent portion of at least one of the coil members at both ends in the coil body stacking direction, the plurality of coils The movement of the bent portion in the stacking direction of the members is restricted by the edge contact surface of the insulating bobbin. Further, at this time, since the pressing force is applied to the edge contact surface by the inner edge portion of the bent portion, a frictional force is also generated with respect to the movement of the bent portion in the direction orthogonal to the stacking direction of the plurality of coil members. . For this reason, the movement of the bent portion in the direction orthogonal to the stacking direction of the plurality of coil members is also restricted by the edge contact surface. Therefore, it is suppressed that the coil member of an edge part contacts the adjacent coil member, and the short circuit between coil members is suppressed as a result.

  The said coil components WHEREIN: It is preferable that the said edge contact surface has a recessed part which fits the inner edge part in the said bending part.

  In this case, since the inner edge portion of the bent portion of the coil member is fitted into the concave portion of the edge contact surface, not only the movement of the coil member in the stacking direction but also the movement in the plane orthogonal to the stacking direction is also performed. Be regulated. For this reason, even if an excessive impact or vibration is applied to the bending portion of the coil member in the stacking direction of the plurality of coil members, the coil member at the end is further suppressed from coming into contact with the adjacent coil member. As a result, a short circuit between the coil members is further suppressed.

  In the coil component, it is preferable that the bent portions of two or more coil members of the coil body are opposed to each other, and a part of the insulating bobbin enters between the bent portions facing each other. .

  In this case, even if an excessive impact or vibration is applied to the bent portion of the coil member at the end, contact between adjacent bent portions is prevented by a part of the insulating bobbin, and as a result Short circuit between the coil members is further suppressed.

  ADVANTAGE OF THE INVENTION According to this invention, even if an excessive vibration and impact are given, the coil components which can suppress the short circuit between coil members are provided.

  Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 1 is an exploded perspective view showing an embodiment of a coil component according to the present invention, FIG. 2 is a perspective view showing a main part of the coil component of FIG. 1, and FIG. 3 is a main part of the coil component of FIG. 4 is a cross-sectional view taken along line IV-IV in FIG.

  As shown in FIG. 1, the coil component 100 according to the present embodiment includes an insulating bobbin 10 having a square cylindrical bobbin main body 11, a coil body 20 wound around the bobbin main body 11, and the coil body 20. And a core 30 composed of a pair of core portions 30a and 30b provided to be sandwiched therebetween.

  The core portions 30a and 30b have projecting portions 30d, 30e, and 30f that are spaced apart from each other on the surface of the flat core body portion 30c, and the projecting portions 30d and 30e of the core portions 30a and 30b that face each other. , 30f are abutted against each other. Accordingly, the core 30 has two through holes.

  The insulating bobbin 10 is arranged so that the bobbin main body 11 passes through the two through holes of the core 30. The bobbin main body portion 11 has four side wall portions 12, 13, 14, and 15, which are arranged so as to form a rectangular cylindrical body. Specifically, the four side wall portions 12, 13, 14, and 15 surround the protruding portion 30 e of the core 30. The insulative bobbin 10 includes flat flange portions 16 and 17 that protrude outward from the two side wall portions 12 and 14 of the bobbin main body portion 11 that face each other. Furthermore, the insulating bobbin 10 has protrusions 18 and 19 that protrude outward from the two side wall portions 12 and 14, respectively.

  Here, the projections 18 and 19 are provided on the flanges 16 and 17, respectively. The reason why the protrusions 18 and 19 are provided on the flanges 16 and 17 is to facilitate the molding and to narrow the interval between the coil member 50 and the coil member 60. The insulating bobbin 10 is made of a resin such as PBT (Polybutylene terephthalate).

  On the other hand, the coil body 20 is wound around the insulating bobbin 10 so as to pass through the two through holes of the core 30. The coil body 20 is made of a metal material such as copper.

  The coil body 20 includes three plate-like coil members 40, 50, 60 connected in series. The three plate-like coil members 40, 50, 60 are sequentially stacked along the extending direction of the bobbin main body 11. Here, each of the coil members 40, 50, and 60 will be described. Hereinafter, for convenience of description, the coil member 40, the coil member 50, and the coil member 60 are referred to as a lower coil member 40, an intermediate coil member 50, and an upper coil member 60, respectively.

  As shown in FIGS. 1 and 3, the lower coil member 40 is in contact with the back surfaces 16 a and 17 a of the two flange portions 16 and 17 of the bobbin 10 and extends linearly. A lower terminal connection portion 41 provided at one end of the lower coil body portion 40a and bent at a right angle to the lower coil body portion 40a, a lower connection terminal 42 provided in the lower terminal connection portion 41, and a lower coil body The lower coil connecting portion 43 provided at one end of the portion 40b and bent at a right angle to the lower coil main body portion 40b and the other ends of the lower coil main body portions 40a and 40b are connected to the lower coil main body portions 40a and 40b. On the other hand, the lower coil member 40, the intermediate coil member 50, and the upper coil member 60 are on the side in the stacking direction (the direction of arrow A in FIG. Is composed of a lower bent portion 44 is bent.

  The lower connecting terminal 42 is bent at a right angle from the end of the lower terminal connecting portion 41 and extends in a direction parallel to the extending direction of the lower coil main body portion 40a. Further, the lower terminal connecting portion 41, the lower coil connecting portion 43, and the lower bent portion 44 protrude outside the coil 30. Here, the lower terminal connecting portion 41, the lower coil connecting portion 43, and the lower bent portion 44 protrude to the opposite sides with respect to the core 30.

  As shown in FIG. 4, the inner edge portion 44 a of the lower bent portion 44 is in contact with the edge contact surface 11 d of the protruding portion 11 c provided on the inner peripheral surface 11 b of the bobbin main body portion 11.

  As shown in FIGS. 1 and 3, the intermediate coil member 50 includes intermediate coil main body portions 50 a and 50 b that are in contact with the surfaces 17 b of the two flange portions 16 and 17 of the bobbin 10 and extend linearly. An intermediate first coil connecting portion 51 provided at one end of the coil main body portion 50a and bent at a right angle to the intermediate coil main body portion 50a and connected to the lower coil connecting portion 43 of the lower coil member 40; An intermediate second coil connecting portion 52 provided at one end of 50b and bent at a right angle with respect to the intermediate coil main body portion 50b is connected to the other ends of the intermediate coil main body portions 50a and 50b to connect the intermediate coil main body portions 50a and 50b. On the other hand, it is comprised by the intermediate | middle bending part 54 bent by the A direction side of FIG. 3 and the upper coil member 60 side.

  Notches 55a and 55b for avoiding the protrusions 18 and 19 of the bobbin 10 are formed at the inner edge portions of the intermediate coil main body portions 50a and 50b, respectively (see FIG. 1). The intermediate coil main body portions 50a and 50b can be brought into contact with the surface 17b of the flange portions 16 and 17 by the notches 55a and 55b. Here, the height of the protrusions 18 and 19 from the surfaces 16b and 17b of the flanges 16 and 17 is larger than the thickness of the intermediate coil main bodies 50a and 50b. For this reason, the protrusions 18 and 19 can suppress contact between the intermediate coil main body portions 50 a and 50 b of the intermediate coil member 50 and the upper coil main body portions 60 a and 60 b of the upper coil member 60. The intermediate first coil connecting portion 51, the intermediate second coil connecting portion 52, and the intermediate bent portion 54 protrude outside the core 30. Here, the intermediate first coil connecting portion 51, the intermediate second coil connecting portion 52, and the intermediate bent portion 54 protrude to the opposite sides with respect to the core 30.

  As shown in FIGS. 1 to 4, the upper coil member 60 is provided on the opposite side to the lower coil body portions 40 a and 40 b of the lower coil member 40 with respect to the intermediate coil body portions 50 a and 50 b of the intermediate coil member 50. Upper coil body portions 60a and 60b extending linearly, an upper coil connection portion 61 provided at one end of the upper coil body portion 60a and bent at right angles to the upper coil body portion 60a, and an upper coil body portion The upper connection terminal 62 provided at one end of 60b and the other ends of the upper coil body portions 60a and 60b are connected to each other, and the intermediate coil member is located on the A direction side in FIGS. 3 and 4 with respect to the upper coil body portions 60a and 60b. 50 and an upper bent portion 64 that is bent to the opposite side.

  Here, the upper bent portion 64 and the intermediate bent portion 54 are arranged to face each other (see FIGS. 3 and 4). The upper connection terminal 62 extends outside the core 30 and away from the core 30.

  The upper bent portion 64 is a portion that protrudes outside the core 30, and the inner edge portion 64 a of the upper bent portion 64 is a contact surface of the protruding portion 11 c provided on the inner peripheral surface 11 b of the bobbin main body portion 11. 11e.

  The lower coil connecting portion 43 and the intermediate first coil connecting portion 51 are connected by, for example, welding, and the intermediate second coil connecting portion 52 and the upper coil connecting portion 61 are also connected by, for example, welding.

  As described above, in the coil component 100 of the present embodiment, in the lower coil member 40 on one end side of the coil body 20, the inner edge portion 44 a of the lower bent portion 44 is provided on the inner peripheral surface 11 b of the bobbin main body portion 11. The protrusion 11c is in contact with the edge contact surface 11d. Therefore, according to the coil component 100, an excessive impact is exerted on the lower bent portion 44 of the lower coil member 40 in the stacking direction of the lower coil member 40, the intermediate coil member 50, and the upper coil member 60 (direction A in FIG. 4). Even if vibration is applied, the movement of the inner edge portion 44a of the lower bent portion 44 in the direction from the lower coil member 40 toward the intermediate coil member 50 is restricted by the edge contact surface 11d. At this time, since the pressing force is applied to the edge contact surface 11d by the inner edge portion 44a of the lower bent portion 44, the lower bent portion 44 moves in a direction perpendicular to the direction A in FIG. A frictional force is also generated. For this reason, the movement of the lower bent portion 44 in the direction orthogonal to the direction A in FIG. 4 is also restricted by the edge contact surface 11d. Therefore, it is suppressed that the lower coil member 40 contacts the adjacent intermediate coil member 50, and the short circuit between the lower coil member 40 and the intermediate coil member 50 is suppressed as a result.

  Further, in the coil component 100, in the upper coil member 60 on the other end side of the coil body 20, the inner edge portion 64 a of the upper bent portion 64 of the protruding portion 11 c provided on the inner peripheral surface 11 b of the bobbin main body portion 11. It is in contact with the edge contact surface 11e. Therefore, according to the coil component 100, the direction from the upper coil member 60 toward the intermediate coil member 50 is applied to the upper bent portion 64 of the upper coil member 60 even if an excessive impact or vibration is applied in the direction A of FIG. The movement of the inner edge portion 64a of the upper bent portion 64 is restricted by the edge contact surface 11e. At this time, since the pressing force is applied to the edge contact surface 11e by the inner edge portion 64a of the upper bent portion 64, the upper bent portion 64 moves in a direction orthogonal to the direction A in FIG. A frictional force is also generated. For this reason, the movement of the upper bent portion 64 in the direction orthogonal to the direction A in FIG. 4 is also restricted by the edge contact surface 11e. Therefore, it is suppressed that the upper coil member 60 contacts the adjacent intermediate coil member 50, and the short circuit between the upper coil member 60 and the intermediate coil member 50 is also suppressed as a result.

  As described above, according to the coil component 100, even if an excessive impact or vibration is applied to the coil body 20, a short circuit between the coil members in the coil body 20 is reliably suppressed. For this reason, it is possible to maintain the characteristics of the coil component 100 substantially constant regardless of whether there is an impact or vibration, and the highly reliable coil component 100 is realized.

  Further, in the coil component 100, as shown in FIG. 4, the edge contact surface 11d has a recess 11f into which the inner edge portion 64a of the upper bent portion 64 of the upper coil member 60 is fitted. For this reason, about the upper coil member 60, not only the movement to the lamination direction of a coil member but the movement in the surface orthogonal to a lamination direction is controlled. For this reason, even if an excessive impact or vibration is applied to the upper bent portion 64 of the upper coil member 60, the upper bent portion 64 of the upper coil member 60 contacts the intermediate bent portion 54 of the opposed intermediate coil member 50. As a result, a short circuit between the upper coil member 60 and the intermediate coil member 50 is further suppressed.

  Furthermore, as shown in FIG. 4, in the coil component 100, the intermediate bent portion 54 of the intermediate coil member 50 is disposed outside the side wall portion 13 of the bobbin main body portion 11. On the other hand, the upper bent portion 64 of the upper coil member 60 is disposed inside the side wall portion 13 of the bobbin main body portion 11. That is, the side wall part 13 which is a part of the bobbin main body part 11 enters between the intermediate bent part 54 and the upper bent part 64. For this reason, even if an in-plane impact or vibration perpendicular to the lamination direction of the coil members is applied to the upper coil member 60, the side wall portion 13 prevents contact between the intermediate bent portion 54 and the upper bent portion 64. Therefore, a short circuit between the intermediate bent portion 54 and the upper bent portion 64 can be prevented. In particular, the coil component 100 has a configuration in which the upper connection terminal 62 extends away from the core 30 and is easily subjected to excessive shock and vibration. Therefore, the coil component 100 having the above configuration is extremely useful. It is.

  In the coil component 100, as shown in FIG. 3, the intermediate first coil connecting portion 51 of the intermediate coil member 50 is brought into contact with the lower terminal connecting portion 41 of the lower coil member 40, and the lower terminal connecting portion 41 is connected to the bobbin main body portion. 11 side walls 15. For this reason, the movement of the direction along the side wall part 12 or the side wall part 14 of the intermediate coil member 50 is controlled.

  Further, the lower bent portion 44 of the lower coil member 40 is in contact with the inner peripheral surface 11 b of the side wall portion 13 of the bobbin main body portion 11, and the lower terminal connection portion 41 is in contact with the side wall portion 15 of the bobbin main body portion 11. ing. And as above-mentioned, since the movement of the direction along the side wall part 12 or the side wall part 14 is controlled about the intermediate coil member 50, the movement of the direction along the side wall part 12 or the side wall part 14 of the lower coil member 40 is also controlled. Is done.

  That is, as shown in FIG. 3, when a force in the direction from the side wall 15 toward the side wall 13 is applied to the lower coil member 40, the movement of the lower bent portion 44 in that direction causes the bobbin main body 11 to move. It is regulated by the inner peripheral surface 11b of the side wall portion 13 of the. Conversely, when a force in the direction from the side wall 13 toward the side wall 15 is applied to the lower coil member 40, the intermediate coil in which the movement of the lower terminal connecting portion 41 in that direction is fixed to the bobbin main body 11. It is regulated by the member 50. As a result, the movement of the lower coil member 40 in the direction along the side walls 12 and 14 is restricted.

  The present invention is not limited to the above embodiment. For example, in the above embodiment, the inner edge portion 44a of the lower bent portion 44 of the lower coil member 40 is in contact with the edge contact surface 11d of the protruding portion 11c of the bobbin main body portion 11, but is not in contact. May be. Even in this case, when an excessive impact or vibration is applied to the upper bent portion 64 of the upper coil member 60, a short circuit between the adjacent upper coil member 60 and the intermediate coil member 50 can be prevented. In addition, the lower coil member 40 and the intermediate coil member 50 are firmly fixed to the bobbin main body portion 11, and the flange portion 16 is interposed between the intermediate coil main body portion 50a and the lower coil main body portion 40a. Since the flange portion 17 is interposed between the main body portion 50b and the lower coil main body portion 40b, it is possible to ensure insulation between the lower coil member 40 and the intermediate coil member 50.

  Furthermore, if the inner edge portion 44 a of the lower bent portion 44 of the lower coil member 40 is in contact with the edge contact surface 11 d of the protruding portion 11 c of the bobbin main body portion 11, the inner edge portion of the upper bent portion 64 will be described. 64a may not contact the edge contact surface 11e of the protrusion 11c of the bobbin main body 11.

  Moreover, in the said embodiment, although the edge contact surface 11d has a recessed part and the inner edge part 64a of the upper bending part 64 is engage | inserted in the recessed part, even if the edge contact surface 11d is a flat surface, I do not care. Even in that case, it is possible to prevent a short circuit between the coil members when an excessive impact or vibration is applied to the coil members.

  Furthermore, in the above embodiment, the coil component 100 has only one intermediate coil member 50, but a plurality of intermediate coil members are provided between the upper coil member 60 and the lower coil member 40. Alternatively, the intermediate coil member 50 may not be provided. That is, the coil component of the present invention may have two coil members.

  Moreover, in the said embodiment, although the shape of the bobbin main-body part 11 of the insulating bobbin 10 is a square cylinder shape, the shape of the bobbin main-body part 11 is not restricted to a square cylinder shape, for example, a triangular cylinder shape Further, it may be a polygonal cylinder such as a pentagonal cylinder or a cylinder.

It is a disassembled perspective view which shows one Embodiment of the coil components which concern on this invention. It is a perspective view which shows the principal part of the coil component of FIG. It is a side view which shows the principal part of the coil components of FIG. It is sectional drawing along the IV-IV line of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Insulating bobbin, 11 ... Bobbin main-body part, 20 ... Coil body, 30 ... Core, 30a, 30b ... Core part, 40, 50, 60 ... Coil member, A ... Lamination direction, 44, 54, 64 ... Bending Part, 44a, 64a ... inner edge part, 11d, 11e ... edge contact surface, 11f ... concave part, 100 ... coil part.

Claims (3)

An insulating bobbin having a cylindrical bobbin main body;
A coil body wound around the bobbin main body of the insulating bobbin;
A core composed of a pair of core portions provided so as to sandwich the coil body,
The coil body is composed of a plurality of plate-like coil members that are stacked apart from each other and connected in series,
A portion of the coil member that protrudes from the core is bent toward the lamination direction of the coil member,
The coil component, wherein the insulating bobbin has an edge abutting surface that abuts an inner edge portion of a bent portion of at least one of the coil members at both ends in the stacking direction of the coil body.   The coil component according to claim 1, wherein the edge abutting surface has a concave portion into which an inner edge portion of the bent portion is fitted.   The bent portions of two or more of the coil members of the coil body are opposed to each other, and a part of the insulating bobbin enters between the bent portions facing each other. The coil component described.

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