JP3996145B2 - Coil parts - Google Patents

Description

  The present invention relates to a coil component.

  Conventionally, for example, a coil component used for a common mode filter or the like includes a core composed of a core part and flanges provided at both ends thereof, an electrode provided on each of the core parts, and a core. And a conductive wire wound around the portion and connected at both ends to the electrodes.

As an example of constituting this electrode, as shown in Patent Document 1, it straddles a pair of side surfaces connected to the opposite surface and the opposite surface of the surface connected to the core portion of the collar portion, and is connected to the core portion of the collar portion. A plate-shaped plate having a substantially U-shape with a first holding portion and a second holding portion that hold a pair of side surfaces that are connected to the opposite surface of the connecting surface and the opposite surface. There are metal terminals.
JP 2003-22916 A

  In addition, with the recent miniaturization of electronic devices, common mode filters and the like used in these electronic devices have also been miniaturized, and currently common mode filters and the like are configured using coil parts of about several millimeters. .

  In recent miniaturized coil parts, the above-mentioned metal terminal is also miniaturized, and it is not easy to attach it to the core by human hands, and also attach the metal terminal to the core from the necessity of mass production. The process is carried out mechanized. In this case, the metal terminal is fixed by being extrapolated to the flange portion of the core.

  In these conventional coil components, when the metal terminal is mounted, the tips of the first holding part and the second holding part of the metal terminal move along the pair of side surfaces of the collar part and are extrapolated. In some cases, the tip portion of the portion is in strong contact with the collar portion along the side surface of the portion, resulting in core chipping. Similarly, when the tips of the first holding part and the second holding part of the metal terminal are in strong contact with the collar part, the first holding part and the second holding part may be deformed. Since either one of the first clamping part and the second clamping part of the metal terminal is in contact with the board-shaped mounting surface and is fused by soldering or the like, the fusion part is deformed. In some cases, the coplanarity between the coil component and the substrate is lowered.

  In the coil component, an adhesive is interposed between the metal terminal and the core to improve the adhesion between the metal terminal and the core. Since the coil component is extremely small as described above, a highly fluid adhesive having a relatively low viscosity is used. After the adhesive is applied to the substantially U-shaped inner surface of the connecting portion of the metal terminal, the metal terminal is attached to the core and connected to the inner surface of the connecting portion of the metal terminal and the core portion of the core flange. It will be interposed between the opposite surface of the surface. In this case, since the substantially U-shaped inner surface of the metal terminal is in contact with the surface of the collar portion, the adhesive is transmitted through the gap between the contact portions by capillary action, and the adhesive is approximately the inner surface of the metal terminal. In some cases, it spreads to the entire portion where the surface of the buttocks abuts.

  As described above, one of the first holding portion and the second holding portion of the metal terminal is a portion that is thermally fused to the mounting surface of the substrate. In addition, either one of the first sandwiching portion and the second sandwiching portion of the metal terminal is a portion where the conducting wire is heat-sealed by arc welding or the like when the conducting wire is connected, and is a portion that is strongly heated. When the adhesive spreads between the first sandwiching part and the second sandwiching part and the collar part, the adhesive is ignited and carbide is generated and scattered, and the scattered carbide adheres to the circuit. There was a risk of short circuiting and adverse effects.

  Further, the bonding portion is formed over the entire substantially U-shaped inner surface of the metal terminal and the three surfaces of the flange portion of the core, whereby the core and the metal terminal are rigidly joined. Since the metal terminals at both ends of the core are fused to the substrate, the metal terminal also deforms following the bending of the substrate. However, if the core and the metal terminal are rigidly joined, the core also Deform. Since the core is generally formed by sintering magnetic powder etc., it is difficult to bend with respect to the substrate made of resin, etc., and when the substrate is bent, the core can not follow the bending and breaks There was a case.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a coil component that makes it easy to extrapolate a terminal fitting to a core and prevents an adhesive from going around to the substrate mounting side of the core.

In order to achieve the above object , a core including a core part and a collar part provided on each end of the core part and having one surface and another surface opposite to the one surface, and extends parallel to the one surface. The first clamping part and the second clamping part extending in parallel with the other surface, and the connecting part that connects the first clamping part and the second clamping part, are attached to the collar and sandwich the one surface and the other surface. Provided is a coil component including a metal terminal and a conductive wire wound around a winding core and having both ends connected to the metal terminal. In this coil component, a first slope in which the distance between one surface and the other surface gradually decreases toward the opposite direction of the mounting direction at the end edge on the upstream side in the mounting direction where the metal fittings on one surface and the other surface are mounted. A first surface and a second inclined surface, the one surface and the other surface extend parallel to each other, and the first and second inclined surfaces are substantially orthogonal to the first surface and the other surface between the most upstream edges in the mounting direction. A confronting surface that confronts the connecting portion is provided. The metal terminal has a substantially U-shape formed by the first sandwiching portion, the second sandwiching portion, and the connecting portion, and at least the first inclined surface and the first sandwiching portion are provided between the metal terminal and the flange portion. And a space surrounded by at least the second inclined surface, the second sandwiching portion, and the connection portion are formed.

  According to such a structure, the front-end | tip part of the mounting direction of a metal terminal contact | abuts to the 1st inclined surface and 2nd inclined surface which were provided in the collar part of the core, and a metal terminal is mounted | worn to a core after that.

Moreover, it is preferable that an adhesive is interposed between the connecting portion and the facing surface.

According to such a configuration, the core and the metal terminal are joined by the adhesive.

  Further, the angle formed by the first inclined surface and the first surface and the angle formed by the second inclined surface and the other surface may be 10 ° or more and 45 ° or less, respectively. Furthermore, the angle formed by the first inclined surface and the first surface and the angle formed by the second inclined surface and the other surface may be 20 ° or more and 35 ° or less, respectively.

  In addition, a first inclined introduction surface connected to the first inclined surface is provided at the most upstream end portion in the mounting direction of the first inclined surface, and an upstreammost end portion in the mounting direction of the second inclined surface is provided. A second inclined introduction surface connected to the second inclined surface may be provided, and the first inclined introduction surface and the second inclined introduction surface may intersect the opposing surface substantially orthogonally.

  According to the coil component of the first aspect of the present invention, the metal terminal has the first holding portion and the second holding portion in the mounting direction front end abutting the first inclined surface and the second inclined surface, and the inclined surface Since it moves smoothly along and is disposed and mounted on one surface and the other surface, it is difficult for the core portion of the collar portion to occur, and deformation of the metal terminal can be suppressed. Since deformation of the metal terminal is suppressed, the coplanarity of the coil component with respect to the substrate when the coil component is mounted on the substrate is improved, and the mounting accuracy of the coil component is improved.

  According to the coil component according to claim 2, the gap surrounded by the first inclined surface, the first sandwiching portion, and the connecting portion, the second inclined surface, the second sandwiching portion, and the connection between the flange portion and the metal terminal. A gap surrounded by the portion is formed. When an adhesive is filled between the connecting portion of the metal terminal and the facing surface of the flange portion, and the metal terminal and the flange portion are bonded, the adhesive spreads in the gap between the facing surface and the connecting portion due to capillary action. The capillarity is blocked by the gap surrounded by the inclined surface, the first sandwiching portion, and the connecting portion, and the gap surrounded by the second inclined surface, the second sandwiching portion, and the connecting portion, and the adhesive is sandwiched between the first surface and the first sandwiching portion. Spreading between the two parts and between the other surface and the second holding part is suppressed.

  According to the coil component of claim 3, the angle formed between the first inclined surface and the first surface and the angle formed between the second inclined surface and the other surface are 45 ° or less, Even when the mounting direction tips of the first holding portion and the second holding portion of the terminal are in strong contact with the first inclined surface and the second inclined surface, the first holding portion and the second holding portion are inclined surfaces. It is possible to smoothly move along the core, and it is difficult for the core portion of the collar portion to be broken, and the deformation of the metal terminal can be suppressed. Further, by setting the angle formed by the first inclined surface and the first surface and the angle formed by the second inclined surface and the other surface to be 10 ° or more, the first holding portion of the metal terminal and the first It is possible to ensure a surface where the two sandwiching portions and the one surface and the other surface are in contact with each other, and the position of the collar portion with respect to the metal terminal can be determined. According to claim 4, the effect according to claim 3 described above can be further enhanced.

  According to the coil component of the fifth aspect, the first inclined introduction surface and the second inclined introduction surface intersect the orthogonal face of the flange portion at the most upstream end in the mounting direction of the first inclined surface and the second inclined surface. To be formed. The core is produced by putting powder such as a magnetic material in a mold such as a mold and compressing the powder in the mold and then removing the mold. The formwork is used by combining a bottom surface of a substantially flat surface that forms a facing surface and the like with a side surface portion that forms a side surface and an inclined surface, etc., but the first inclined introduction surface and the second inclined introduction surface are opposed to the flange portion. By forming so as to intersect the surface substantially orthogonally, an acute angle portion is not formed on the side surface portion of the mold, so that the durability of the mold is increased and the mold is easily separated from the molded product.

  A coil component according to an embodiment of the present invention will be described with reference to FIGS. The coil component 1 is a common mode filter used for a high-speed operation signal interface, and its dimension is about 4 mm in the longitudinal direction. As shown in FIG. 1, a drum-type magnetic core 2 and two conductors 3A The conductive wire 3B, the metal terminal 9, and the metal terminal 10 are included. The magnetic core 2 is formed by a magnetic powder such as ferrite being compressed and sintered.

  As shown in FIG. 2, the magnetic core 2 is provided with a core part 5 having a substantially rectangular cross section perpendicular to the longitudinal direction, and a pair of flange parts 4, 4 having substantially the same shape provided at both ends in the longitudinal direction of the core part 5. Consists of. As shown in FIG. 2, the core 5 is composed of a top surface 5A, a bottom surface 5F, a side surface 5D, and a side surface 5E. As shown in FIG. 1, two conductors 3A and 3B are formed on the top. It is wound around the outer periphery of surface 5A, bottom surface 5F, side surface 5D, and side surface 5E. Hereinafter, since the flange part 4 has substantially the same shape, unless otherwise specified, only one side will be described. As shown in FIG. 2, the longitudinal direction of the core part 5 is the x-axis direction, and the width of the core part 5 A direction is defined as a y-axis direction, and a direction orthogonal to the x-axis direction and the y-axis direction is defined as a z-axis direction.

  As shown in FIG. 2, the flange portion 4 includes a main body portion 6 which is a portion connected to the core portion 5, a sub-body portion 7 extending from the main body portion 6 in the y-axis direction, and a sub-body. It is composed of a sub barrel portion 8 extending in the direction opposite to the portion 7. The auxiliary body part 7 and the auxiliary body part 8 are configured to be plane-symmetric with respect to the zx plane passing through the width center of the core part 5.

  The main body portion 6 is formed in a substantially rectangular shape having a longitudinal direction in the z-axis direction and a width direction in the y-axis direction and substantially the same width as the core portion 5, and the top surface 5 </ b> A of the core portion 5. A top surface 6A that protrudes further and is substantially parallel to the xy plane, a side surface 6C that is coupled to the core portion 5, a side surface 6B that is the opposite surface of the side surface 6C and that is substantially orthogonal to the top surface 6A, and the core portion The lower surface 6F protrudes from the lower surface 5F and is substantially parallel to the top surface 6A, and the side surface 6D and the side surface 6E are connected to the top surface 6A, the lower surface 6F, the side surface 6B, and the side surface 6C.

  The secondary body portion 7 extends from the side surface 6D in the y-axis direction and is formed in a substantially rectangular parallelepiped shape having the longitudinal direction in the z-axis direction. The side surface 7C is flush with the side surface 6C of the main body portion 6; The lower surface 7F is provided on the same plane as the lower surface 6F. Also, a top surface 7A is provided at a position parallel to and opposed to the lower surface 7F of the sub barrel portion 7 at a position recessed with respect to the top surface 6A of the main barrel portion 6, and substantially opposite to the top surface 7A facing the side surface 7C. The orthogonal side surface 7B is provided at a position recessed with respect to the side surface 6B of the main body portion 6. A side surface 7D parallel to the side surface 6D is formed so as to intersect the top surface 7A, the lower surface 7F, the side surface 7B, and the side surface 7C.

  The sub trunk portion 8 is configured symmetrically with the sub trunk portion 7 and extends from the side surface 6E in the y-axis direction, and includes a top surface 8A, a bottom surface 8F, a side surface 8B, a side surface 8C, and a side surface 8E. Has been. Further, as shown in FIG. 3, a concave portion 7 a and a concave portion 7 f are formed at substantially the center portions of the top surface 7 </ b> A and the bottom surface 7 </ b> F of the sub trunk portion 7. Similarly, a recess 8a and a recess 8f are formed.

  A metal terminal 9 described later is extrapolated to the sub barrel portion 7 so as to sandwich the top surface 7A and the bottom surface 7F from the direction of the side surface 7B with respect to the top surface 7A and the bottom surface 7F. Accordingly, the direction from the side surface 7B to the side surface 7C is the mounting direction S of the metal terminal 9 (FIG. 3), the first surface where the top surface 7A is sandwiched by the metal terminal 9, and the other surface where the lower surface 7F is also sandwiched. The side surface 7 </ b> B is a facing surface facing the metal terminal 9. Similarly, the metal terminal 10 is extrapolated to the auxiliary body portion 8, the direction from the side surface 8B toward the side surface 8C is the mounting direction S ', and the top surface 8A is held between the metal terminal 10 and the first surface, the bottom surface 8F. Is the other side, and the side surface 8 </ b> B is a facing surface facing the metal terminal 10. These mounting directions S and S 'are directions substantially parallel to the x-axis direction.

  At the point where the top surface 7A and the side surface 7B of the sub trunk portion 7 intersect and the portion where the lower surface 7F and the side surface 7B intersect, the first surface is directed in the direction opposite to the mounting direction S as shown in FIG. The first inclined surface 7G and the second inclined surface 7H are provided in which the distance between the top surface 7A and the lower surface 7F, which is the other surface, gradually decreases. The first inclined surface 7G and the second inclined surface 7H are connected to the top surface 7A and the lower surface 7F, respectively, and are inclined about 30 ° with respect to the top surface 7A and the lower surface 7F, respectively.

  On the most upstream side in the mounting direction S of the first inclined surface 7G and the second inclined surface 7H, a first inclined introduction surface 7I connected to the first inclined surface 7G and intersecting the side surface 7B substantially orthogonally, and a second The second inclined introduction surface 7J that is connected to the inclined surface 7H and intersects the side surface 7B substantially orthogonally is provided. Therefore, the portion where the top surface 7A and the side surface 7B intersect is chamfered by the first inclined surface 7G and the first inclined introduction surface 7I, and the portion where the lower surface 7F and the side surface 7B intersect is the second inclined surface 7H. And the second inclined introduction surface 7J is chamfered. Similarly, the first body 8G and the second slope 8H, the first slope introduction face 8I, and the second slope introduction face 8J are also provided in the sub trunk portion 8, and the point where the top face 8A and the side face 8B intersect is as follows. The first inclined surface 8G and the first inclined introduction surface 8I are chamfered, and the portion where the lower surface 8F intersects the side surface 8B is chamfered by the second inclined surface 8H and the second inclined introduction surface 8J.

  A substantially U-shaped metal terminal 9 serving as an electrode is attached to the sub barrel portion 7, and similarly, a metal terminal 10 is attached to the sub barrel portion 8. The metal terminal 9 and the metal terminal 10 also have the same plane-symmetric configuration as the sub barrel portion 7 and the sub barrel portion 8.

  The substantially U-shaped metal terminal 9 includes a first holding portion 9A and a second holding portion 9F that are a pair of substantially U-shaped arm portions, and a connecting portion 9B that connects the pair of arm portions. Composed. The first holding part 9A, the second holding part 9F, and the connecting part 9B are formed by bending a single metal plate so that the first holding part 9A and the second holding part 9F are substantially parallel. The first sandwiching portion 9A, the second sandwiching portion 9F, and the connecting portion 9B are substantially orthogonal to each other, and the distance between the first sandwiching portion 9A and the second sandwiching portion 9F is the sub trunk portion 7. It is formed so as to be the same distance as the length in the z-axis direction. Further, a convex portion 9G that protrudes toward the inside of the substantially U-shape is provided on the inner surface of the first sandwiching portion 9A, and the substantially U-shape of the second sandwiching portion 9F is provided. On the inner surface of the shape, a convex portion 9H is provided that protrudes toward the inner side of the substantially U-shape. The metal terminal 10 is also formed in the same manner as the metal terminal 9, and a convex portion 10 </ b> G is provided on the substantially U-shaped inner surface of the first holding portion 10 </ b> A so as to protrude toward the inner side of the approximately U-shape. A convex portion 10H that protrudes toward the inside of the substantially U-shape is provided on the inner surface of the substantially U-shape of the second holding portion 10F.

  As shown in FIG. 5, the metal terminal 9 has the inner surface of the first holding portion 9A and the top surface 7A in contact with each other, the convex portion 9G is engaged with the concave portion 7a, and the inner surface of the second holding portion 9F and the lower surface 7F. And the convex portion 9H engages with the concave portion 7f, and the inner surface of the connecting portion 9B and the side surface 7B come into contact with each other and are fixed to the auxiliary trunk portion 7. Similarly to the metal terminal 9, the metal terminal 10 is also fixed to the sub trunk portion 8.

  Further, the first holding portion 9A of the metal terminal 9 is provided with a section 9I from a side portion facing the side surface 6D of the main barrel portion 6 of the first holding portion 9A. The section 9I is bent so as to be in contact with the outer surface of the first holding section 9A at the connecting portion between the section 9I and the first holding section 9A. Further, the width of the second pinching portion 9F and the second holding portion of the connecting portion 9B extends from the first holding portion 9A of the metal terminal 9 to the vicinity of the connecting portion of the connecting portion 9B with the first holding portion 9A. It is formed narrower than the vicinity of the connection point with 9F. Similarly to the metal terminal 9, the metal terminal 10 is also provided with a section 10I and is similarly narrow in width.

  Hereinafter, a process of forming the coil component 1 by attaching the metal terminal 9 and the metal terminal 10 to the magnetic core 2 will be described. Since the shapes of the metal terminal 10 and the sub barrel portion 8 are the same as those of the metal terminal 9 and the sub barrel portion 7 in plane symmetry, the metal terminal 10 is attached in the same process as the metal terminal 9 unless otherwise specified.

  When the metal terminal 9 is attached to the sub barrel portion 7 of the flange portion 4, an adhesive 11 is applied to the substantially U-shaped inner surface of the connecting portion 9B as shown in FIG. And the metal terminal 9 is arrange | positioned in the state which the connection part 9B inner surface and the side surface 7B of the sub trunk | drum 7 oppose substantially parallel. In this state, the metal terminal 9 is brought close to the sub barrel portion 7, and the opposite end portions of the first holding portion 9A and the connecting portion 9B of the second holding portion 9F are on the top surface 7A and the lower surface, respectively. It is extrapolated to the sub trunk | drum 7 along 7F.

  The distance between the first holding portion 9 </ b> A and the second holding portion 9 </ b> F of the metal terminal 9 is shaped to be substantially the same as the length of the auxiliary trunk portion 7 in the z-axis direction. Since the distance on the most upstream side in the mounting direction between the first inclined surface 7G and the second inclined surface 7H is shorter than the length in the z-axis direction of the sub trunk portion 7, the first holding portion 9A and the second holding portion It becomes shorter than the distance between 9F. Therefore, when extrapolating the metal terminal 9 to the sub-body portion 7, at least the first flow side end in the mounting direction of the first inclined surface 7G and the second inclined surface 7H is the first inclined surface 7G and the second inclined surface. 7H and the first inclined surface 7G and the second inclined surface 7H can be along the top surface 7A and the lower surface 7F without contacting the side surface 7B.

  In addition, when the distance between the first holding portion 9A and the second holding portion 9F is slightly shorter than the length of the sub barrel portion 7 in the z-axis direction due to tolerance when forming the metal terminal 9 or the magnetic core 2, The position at the time of attachment with the metal terminal 9 and the magnetic core 2 may shift | deviate a little. In this case, the end portions of the first holding portion 9A and the second holding portion 9F cannot extend along the top surface 7A and the lower surface 7F, and the first holding portion 9A and the second holding portion 9F Are in contact with the first inclined surface 7G and the second inclined surface 7H, respectively.

Since the first inclined surface 7G and the second inclined surface 7H have an inclination angle of 30 ° with respect to the top surface 7A and the lower surface 7F, respectively, the first narrow surface 7G and the second inclined surface 7H are in contact with each other. The end portions of the holding portion 9A and the second holding portion 9F slide on the first inclined surface 7G and the second inclined surface 7H, and are guided to the top surface 7A and the lower surface 7F so as to be on the top surface 7A and the lower surface 7F. Along the top, the auxiliary body part 7 is held. Therefore, even if the end portions of the first holding portion 9A and the second holding portion 9F try to make strong contact with the side surface 7B substantially perpendicular to the mounting direction S, the first holding portion 9A and the second holding portion 9F. The end of the metal terminal 9 comes into contact with the first inclined surface 7G and the second inclined surface 7H , and the metal terminal 9 is connected to the second terminal without causing the chipping of the core or the deformation of the first holding portion 9A and the second holding portion 9F. It becomes possible to extrapolate to the trunk portion 7.

In this state, the metal terminal 9 is further extrapolated so as to be close to the sub barrel portion 7, and the convex portion 9G and the concave portion 7a are engaged with each other, and the convex portion 9H and the concave portion 7f are engaged with each other. The inner surface and the side surface 7B abut. Since the adhesive 11 is applied to the inner surface of the connecting portion 9B, the adhesive 11 spreads between the inner surface of the connecting portion 9B and the side surface 7B by capillary action. However, the connecting portions of the connecting portion 9B, the first holding portion 9A, and the second holding portion 9F are orthogonal to each other and are substantially right-angled portions, whereas the side surface 7B, the top surface 7A, and the lower surface 7F are Since they are connected in a chamfered state by one inclined surface 7G, second inclined surface 7H, etc., they are surrounded by the connecting portion 9B, the first holding portion 9A, the first inclined surface 7G, and the first inclined introducing surface 7I. A second space surrounded by the first space and the connecting portion 9B, the second holding portion 9F, the second inclined surface 7H, and the second inclined introduction surface 7J is formed.

Capillary phenomenon generally occurs when the liquid is in a narrow space, and hardly occurs in a wide space. Therefore, by forming the first space , the adhesive 11 is prevented from entering before the first space , that is, between the top surface 7A and the first holding portion 9A. Similarly, by forming a second space surrounded by the connecting portion 9B, the second holding portion 9F, the second inclined surface 7H, and the second inclined introducing surface 7J, between the lower surface 7F and the second holding portion 9F. It is possible to prevent the adhesive from entering the surface. Moreover, since it is suppressed that the adhesive agent 11 spread | diffuses by a capillary phenomenon in said clearance gap, it becomes unnecessary to adjust the application quantity of the adhesive agent 11 strictly, and workability | operativity improves.

  After the metal terminal 10 is attached in the same manner as the metal terminal 9, the conducting wire 3 </ b> A and the conducting wire 3 </ b> B are wound around the core portion 5. The ends of the wound conducting wire 3A and conducting wire 3B are respectively connected to the metal terminals 9 and the first holding portions 9A and the sections 9I of the metal terminals 9 and the metal terminals 10 and the first narrow portions. The holding portion 10A and the segment 10I are arranged substantially parallel to the x-axis direction at a position where they are connected. Thereafter, it is heat-sealed by arc welding or the like, and is electrically connected to the metal terminal 9 and the metal terminal 10. At this time, since the adhesive 11 does not enter between the top surface 7A and the first holding portion 9A and between the top surface 8A and the first holding portion 10A, the adhesive 11 is ignited. The generation of carbides and the like is suppressed.

  Thereafter, the section 9I and the section 10I are bent so as to be substantially parallel to the first holding section 9A and the first holding section 10A to protect the connecting portions of the conducting wires 3A and 3B, and the coil component 1 is completed. Thereafter, the plate-like core 20 shown in FIG. 2 is fixed to the top surfaces 5A and 5A of the main body portions 6 and 5 of the flange portions 4 and 4 by using an adhesive, and the plate-like core 20 and the magnetic core 20 are magnetically bonded. A closed magnetic path may be formed by the core 2. In this case, the top surface 7A and the top surface 8A, which are the connection points of the metal terminal 9 and the metal terminal 10, are in a position recessed from the top surface 6A of the main body 6, and the top surface 6A, the top surface 7A and the top surface A step is formed between the surface 8A. Therefore, when the plate-shaped core 20 is fixed on the surface 6A, the connecting portion is accommodated in the step, and the plate-shaped core 20 is fixed well without contacting the plate-shaped core 20 and the connecting portion. .

  When the completed coil component 1 is mounted on the mounting surface 12A and the mounting surface 12B on the substrate 12, as shown in FIG. 6, the second holding portion 9F and the second holding portion 10F are substantially The letter-shaped outer surface is the mounting surface side. Therefore, after applying cream solder to the land pattern of the substrate, heat fusion is performed, and the coil component 1 is mounted on the substrate on the mounting surface side. In this case, the second holding portion 9F and the second holding portion 10F serve as heating places, but between the second holding portion 9F and the lower surface 7F and between the second holding portion 10F and the lower surface 8F. Since the adhesive 11 does not intervene, it can be suitably mounted by heat fusion.

  In a state where the coil component 1 is mounted, the mounting surface 12A and the mounting surface 12B of the substrate 12 are bonded to the metal terminal 9 and the metal terminal 10 by the above-described heat fusion. As shown in FIG. 7, when the substrate 12 is bent, the metal terminal 9 and the metal terminal 10 also move following the substrate 12. In this case, a moment force is applied between the metal terminal 9 and the metal terminal 10 and the magnetic core 2.

  However, in the coil component 1 according to the embodiment, the metal terminal 9 and the metal terminal 10 are bonded to the sub barrel portion 7 and the sub barrel portion 8, but the bonding surfaces are only the side surface 7B and the side surface 8B. Even if the substrate 12 is bent and the positions of the metal terminal 9 and the metal terminal 10 are changed, for example, in the metal terminal 9, the first holding portion 9A and the second holding portion 9F are the protruding portion 9G and the protruding portion 9H. Is disengaged and the first holding portion 9A and the top surface 7A are shifted from each other, and the second holding portion 9F and the lower surface 7F are shifted from each other. As a result, the first holding portion 9A and the second holding portion 9F are formed by the substantially U-shaped inner surfaces of the first holding portion 9A and the second holding portion 9F, the top surface 7A, and the lower surface 7F. The auxiliary body portion 7 is held in a state where the contact is released. The side surface 7B and the substantially U-shaped inner surface of the connecting portion 9B are such that the bonded adhesive 11 extends due to its elasticity, and a part of the joint portion between the side surface 7B and the approximately U-shaped inner surface of the connecting portion 9B is formed. It will be held in a dissociated state.

  Therefore, the moment force between the metal terminal 9 and the metal terminal 10 and the magnetic core 2 is shifted between the first holding portion 9A and the top surface 7A, and between the second holding portion 9F and the lower surface 7F. And part of the joint between the side surface 7B and the substantially U-shaped inner surface of the connecting portion 9B, the first holding portion 10A and the top surface 8A, and the second holding portion 10F and the lower surface 8F The magnetic core 2 is prevented from being broken even if the substrate 12 is bent by being absorbed by the gap and the partial dissociation of the joint portion between the side surface 8B and the substantially U-shaped inner surface of the connecting portion 10B. It becomes possible, and it becomes possible to improve the bending strength as the coil component 1 whole.

  As described above, the magnetic core 2 is molded by putting magnetic powder such as ferrite in a mold as a mold and compressing it. When molding the magnetic core 2, a substantially flat mold is used to form the side surface 7B due to the manufacturing problem of the mold, and the first inclined surface is formed on the mold forming the side surface 7B. The magnetic core 2 is molded by bonding a mold for forming 7G or the like. At this time, since the first inclined surface 7G has an angle of about 60 ° with respect to the side surface 7B, the tip of the mold is also 60 °. In general, when an acute mold is used, the acute angle portion at the tip thereof is deformed by pressure during compression, and the service life is reduced compared to other molds. Therefore, the first inclined introduction surface 7I that is substantially orthogonal to the mold that forms at least the side surface 7B is formed at the tip portion to eliminate the acute angle portion, thereby improving the service life of the mold. Similarly, a second inclined introduction surface 7J is provided.

  In the present embodiment, the first inclined surface 7G and the second inclined surface 7H have an inclination of 30 ° with respect to the top surface 7A and the lower surface 7F, respectively. If this inclination angle is a steep angle, for example, an angle exceeding 45 °, the first inclined surface 7G and the second inclined surface 7H are in strong contact with the end portions of the first holding portion 9A and the second holding portion 9F. In some cases, the end portions of the first holding portion 9A and the second holding portion 9F do not move smoothly along the inclination, and a core chip or the like may occur.

  Conversely, if the inclination angle is a gentle angle, for example, less than 10 °, the first inclined surface 7G and the second inclined surface 7H become too large with respect to the top surface 7A and the lower surface 7F, and the top surface 7A and the lower surface 7F The area of contact between the first holding portion 9A and the second holding portion 9F becomes small, and cannot be held sufficiently. Therefore, the inclination angle is at least 10 ° to 45 °, preferably 20 ° to 35 °.

  The coil component according to the present invention is not limited to the above embodiment, and various changes and improvements can be made within the scope of the claims.

The top view of the coil components concerning embodiment. The disassembled perspective view of the coil components concerning embodiment. Sectional drawing of the magnetic core of the coil components concerning embodiment. The side view showing the engagement process of the sub trunk | drum of the coil components concerning embodiment, and a metal terminal. The side view showing the engagement state of the sub trunk | drum and metal terminal of the coil components concerning embodiment. The side view of the state which mounted the coil components concerning embodiment on a board | substrate. The side view of the state which mounted the coil components concerning embodiment on the board | substrate, and the board | substrate bent.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Coil component 2 Magnetic core 3A Conductive wire 3B Conductive wire 4 Eave part 5 Core part 5A Top surface 5D Side surface 5E Side surface 5F Lower surface 6 Main trunk part 6A Conductive wire 6B Conductive wire 6C Side surface 6D Side surface 6E Side surface 6F Lower surface 7A Top surface 7A Top surface 7B Side surface 7C Side surface 7D Side surface 7F Lower surface 7G First inclined surface 7H Second inclined surface 7I First inclined introduction surface 7J Second inclined introduction surface 7a Recess 7f Recess 8 Sub trunk 8A Top surface 8B Side surface 8C Side surface 8E Side surface 8F Lower surface 8G First surface One inclined surface 8H Second inclined surface 8I First inclined introducing surface 8J Second inclined introducing surface 8a Recessed portion 8f Recessed portion 9 Metal terminal 9A First holding portion 9B Connecting portion 9F Second holding portion 9G Convex portion 9H Convex portion 9I Intercept DESCRIPTION OF SYMBOLS 10 Metal terminal 10A 1st clamping part 10B Connection part 10F 2nd clamping part 10G Convex part 10H Convex part 10I Section 11 Adhesive 12 Board | substrate 12A Mounting surface 12B Mounting surface 20 Plate core

Claims (5)

A core provided with a winding core part, and a collar part provided on each end of the winding core part and having one surface and the other surface facing the one surface;
A first sandwiching portion extending parallel to the one surface; a second sandwiching portion extending parallel to the other surface; and a connecting portion connecting the first sandwiching portion and the second sandwiching portion; A metal terminal sandwiching the one surface and the other surface;
A conductive wire wound around the core and having both ends connected to the metal terminal;
The distance between the one surface and the other surface gradually decreases toward the opposite direction of the mounting direction at the end edge on the upstream side in the mounting direction where the metal fittings on the one surface and the other surface are mounted. An inclined surface and a second inclined surface are provided, respectively, the one surface and the other surface extend in parallel with each other , and the one surface and the second inclined surface are between the first inclined surface and the most upstream edge in the mounting direction of the second inclined surface. An opposing surface that is substantially orthogonal to the other surface and abuts against the connecting portion;
The metal terminal is substantially U-shaped by the first sandwiching portion, the second sandwiching portion, and the connecting portion,
Between the metal terminal and the flange portion, at least a space surrounded by the first inclined surface, the first holding portion and the connecting portion, at least the second inclined surface and the second holding portion. And a space surrounded by the connecting portion is formed . The coil component according to claim 1, wherein an adhesive is interposed between the connecting portion and the facing surface.   The angle formed by the first inclined surface and the one surface and the angle formed by the second inclined surface and the other surface are 10 ° or more and 45 ° or less, respectively. 2. The coil component according to 2.   The angle formed by the first inclined surface and the one surface and the angle formed by the second inclined surface and the other surface are 20 ° or more and 35 ° or less, respectively. Coil parts.   A first inclined introduction surface connected to the first inclined surface is provided at the most upstream end portion in the mounting direction of the first inclined surface, and the first upstream end portion in the mounting direction of the second inclined surface is provided with the first inclined surface. A second inclined introduction surface connected to two inclined surfaces is provided, and the first inclined introduction surface and the second inclined introduction surface intersect the orthogonal surface substantially orthogonally. The coil component according to claim 4.

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