JP2006004979A - Coil component - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coil component in which a metal terminal can be easily and externally fitted to a core and position deviation after the fitting occurs hardly. <P>SOLUTION: A recess 11a having a truncated pyramid shape and a groove section 11b that is open to the side in the recess 11a and a first inclined surface 7G are formed on a top surface 7A of a sub barrel section 7 for composing the collar section of a magnetic core. The groove section 11b is formed so that its width spreads from the recess 11a toward the first inclined surface 7G. A projection 15A having a truncated pyramid shape is provided at the first pinching section of the metal terminal 9. A recess 12a and a groove 12b are formed also on a lower surface 7F, and a projection 16 is provided also at the second pinching section of the metal terminal 9. When externally fitting the metal terminal 9 to the sub barrel section 7, a projection 15 slides in the groove section 11b and is guided into the recess 11a, and the projection 15 is engaged to the recess 11a. <P>COPYRIGHT: (C)2006,JPO&NCIPI

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, a first sandwiching portion extending in parallel to one surface of the collar portion and having a first sandwiching surface, and a second sandwiching surface extending in parallel to the other surface of the collar portion A second sandwiching portion having a first gripping portion and a connecting portion connecting the first sandwiching portion and the second sandwiching portion, and the first sandwiching surface and the second narrowing portion when attached to the collar portion. There is a substantially U-shaped metal terminal that sandwiches one surface and the other surface by the holding surface.
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 the coil component described in Patent Document 1, a claw portion is provided at the tip of the first holding portion, and the metal terminal is fitted to the flange portion by the claw portion, the first holding portion, and the connecting portion. Yes. 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 the coil component described in Patent Literature 1, when the metal terminal is mounted, the tips of the first pinching portion and the second pinching portion of the metal terminal are expanded, and the claw portion of the tip portion extends along one surface of the collar portion. After the movement, the claw portion, the first holding portion, and the connecting portion are fitted and fixed to the core. Since the metal terminal is an elastic body, it is restored to its original U-shape by the elastic force even after the opening of the substantially U-shaped opening is expanded, but the metal terminal is not completely restored and distortion remains in the metal terminal. Was.

  In order to fit the metal terminal and the collar part of the core without using the above-mentioned claw part, for example, a recess is formed on one side and the other side of the collar part, and the metal that sandwiches this one side and the other side It is conceivable to provide convex portions that can be engaged with the concave portions in the first holding portion and the second holding portion of the terminal. In this case, the metal terminal is extrapolated to the flange portion, the concave portion and the convex portion are engaged, and the metal terminal and the core are fitted.

  However, it is substantially possible to insert the first and second surfaces of the collar between the convex portion provided on the first holding portion of the metal terminal and the convex portion provided on the second holding portion. It is necessary to expand the first sandwiching portion and the second sandwiching portion which are U-shaped arm portions, and in this case, distortion remains as in the metal terminal described in Patent Document 1. Further, even if the concave portion and the convex portion are engaged with each other, the tip portion of the convex portion and the concave portion of the concave portion are only in contact with each other at a point, and the metal terminal has a backlash such as rotation about the contact portion as an axis. May also occur.

  Further, when the metal terminal is extrapolated to the collar part, the convex part of the first clamping part and the convex part of the second clamping part moved along the first surface and the second other surface of the collar part. It is engaged with the recess later. However, the alignment of the convex portion with respect to the concave portion is not sufficient, and the concave portion and the convex portion may not be engaged even after extrapolation of the metal terminal.

  Therefore, an object of the present invention is to provide a coil component in which a metal terminal is easily extrapolated to a core and is less likely to be displaced after extrapolation.

  In order to achieve the above object, a core including a core portion, and a flange portion provided on each end of the core portion and having one surface and the other surface facing the one surface, and a parallel to the one surface A first holding part having an extended first holding surface, a second holding part having a second holding surface extending in parallel with the other surface, and a connecting part for connecting the first holding part and the second holding part And a metal terminal that sandwiches the one surface and the other surface by the first sandwiching surface and the second sandwiching surface when attached to the collar portion, and the winding core portion. A coil component comprising a conductive wire wound at both ends of the metal terminal and having a recess formed in at least one surface of the one surface or the other surface, and the metal terminal A guide groove extending in the mounting direction from the upstream edge of the flange portion to the recess in the mounting direction when mounting to the flange is shallower than the recess. At least one of the first holding part and the second holding part is formed on the at least one surface, and when the metal terminal is mounted on the collar part, the sliding groove is engaged with the guide groove. Provided is a coil component in which a convex portion that can be engaged with the concave portion is projected. According to such a configuration, the convex portion engages with the concave portion after sliding in the guide groove.

  Further, the concave portion may be formed on both surfaces of the one surface and the other surface, and the convex portion may protrude from both surfaces of the first sandwiching surface and the second sandwiching surface. Further, the groove width at the end edge portion of the guide groove may be larger than the width of the concave portion.

  The convex portion is formed in a truncated pyramid shape, and the concave portion is drilled in a truncated pyramid shape, and a corner portion formed in the convex portion and a corner portion drilled in the concave portion are formed. It may be engageable. Further, the groove width of the guide groove may be gradually increased from the concave portion toward the edge portion.

  According to the coil component of the first aspect, when the metal terminal is extrapolated to the flange portion of the core, the convex portion is guided to the concave portion by the guide groove and engages with the concave portion. Mismatches are less likely to occur. Further, since the guide groove is shallower than the recess, the recess is formed at a position one step below the guide groove. Since the convex part engaged with the concave part is arranged in a state where it is held at a position one step lower than this step, the part where the convex part is raised one step after engaging unless a force is applied from the outside. There is no return to the guide groove. In addition, when extrapolating the metal terminal, the first holding part or the second holding part provided with the convex part is substantially U-shaped so that the convex part can slide along the guide groove part. Although the opening portion is expanded, the amount of expansion when the convex portion slides along the guide groove is small compared to the amount of expansion when the convex portion slides along one surface or the other surface. Distortion occurring in the metal terminal is also reduced.

  According to the coil component of the second aspect, the effect of the coil component of the first aspect can be further enhanced.

  According to the coil component of the third aspect, when the metal terminal is extrapolated to the collar part, even if the position of the convex part is slightly deviated from the position of the concave part in the direction orthogonal to the mounting direction of the metal terminal. The convex portion can be easily guided into the guide groove.

  According to the coil component of claim 4, when the concave portion and the convex portion are engaged with each other, the respective corner portions come into contact with each other, so that the first holding surface or the second holding surface and the concave portion provided with the convex portion are It is difficult for a horizontal shift to occur between the formed one surface or the other surface, and between the first holding surface or the second holding surface and the one surface or the other surface with the concave portion and the convex portion as the axis of rotation. It is also difficult for the rotational direction to shift.

  According to the coil component of claim 5, at least the convex portion led into the guide groove is brought together at the concave portion position and engaged with the concave portion when the metal terminal is extrapolated and close to the collar portion. Is possible.

  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, two conducting wires 3 </ b> A and 3 </ b> B, a metal terminal 9, and a metal terminal 10 are configured. 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 connected 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 5 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 FIGS. 2 and 3, a recess 11 a and a guide groove 11 b are formed on the top surface 7 </ b> A of the sub barrel portion 7.

  As shown in FIGS. 4 and 5, the recess 11a includes a substantially square bottom wall 11A that is substantially parallel to the top surface 7A, and side walls 11B, 11C, 11D, and 11E that are connected to the sides of the bottom wall 11A. Thus, a truncated quadrangular pyramid is formed. The side where the side wall 11B of the bottom wall 11A is connected is substantially parallel to the side surface 7B. The side wall 11C faces the side wall 11B. The side wall 11D and the side wall 11E are connected to the side wall 11B and the side wall 11C.

  As shown in FIG. 5, the guide groove 11b includes a pair of side walls 11G-1 and 11G-2 that extend substantially perpendicular to the groove bottom wall 11F from both ends of the groove bottom wall 11F and the groove bottom wall 11F. It is formed by. The groove bottom wall 11F intersects the side wall 11B and is connected to the first inclined surface 7G (FIGS. 3 and 6), which will be described later, and has a width that is a distance between 11G-1 and 11G-2. It is formed to be substantially the same as the side wall 11B at a portion connected to the side wall 11B, and is formed so that its width gradually increases in the direction from the side wall 11B toward the first inclined surface 7G. As shown in FIG. 4, the groove bottom wall 11F is a surface substantially parallel to the top surface 7A, and the distance from the top surface 7A to the groove bottom wall 11F is shorter than the distance from the top surface 7A to the bottom wall 11A. Is formed. Therefore, the guide groove 11b is formed to open in each of the recess 11a and the first inclined surface 7G.

  A recess 12f and a guide groove 12b are also formed on the lower surface 7F. Since the recess 12f and the guide groove 12b are formed in the same manner as the recess 11a and the guide groove 11b, the description thereof is omitted. Further, the concave portion 13a and the guide groove 13b are formed on the top surface 8A of the auxiliary body portion 8, and the concave portion 14f and the guide groove 14b are formed on the lower surface 8F. Since these structures are substantially the same as the sub trunk | drum 7, description is abbreviate | omitted.

  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. Further, the end portion of the guide groove 11b and the end portion of the guide groove 12b are opened in the middle of the inclined surfaces of the first inclined surface 7G and the second inclined surface 7H, 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 are configured to be symmetrical with each other in the same manner as the sub barrel portion 7 and the sub barrel portion 8.

  As shown in FIG. 6, the substantially U-shaped metal terminal 9 connects the pair of arm portions to the first and second holding portions 9 </ b> A and 9 </ b> F that form a pair of substantially U-shaped arm portions. And a connecting portion 9B. A first holding surface 9G and a second holding surface 9H for holding the auxiliary body portion 7 are provided on the inner surfaces of the first holding portion 9A and the second holding portion 9F. In the first holding portion 9A, the second holding portion 9F, and the connecting portion 9B, one metal plate is bent, and the first holding surface 9G and the second holding surface 9H are substantially parallel. The first sandwiching portion 9A and the second sandwiching portion 9F are substantially orthogonal to the connecting portion 9B, and the distance between the first sandwiching surface 9G and the second sandwiching surface 9H is the sub trunk portion 7. The distance is substantially the same as the length in the z-axis direction. Similarly to the metal terminal 9, the metal terminal 10 includes a first holding portion 10A and a second holding portion 10F, and a connecting portion 10B that connects them, and the first holding portion 10A and the second holding portion 10F. A first sandwiching surface 10G and a second sandwiching surface 10H that sandwich the auxiliary body 8 are provided on the substantially U-shaped inner surface.

  Further, the first sandwiching surface 9G is provided with a convex portion 15 projecting toward the inner side of the substantially U-shape. The convex portion 15 includes a top wall surface 15A formed in a substantially square shape having sides substantially parallel to the first sandwiching surface 9G, and side wall surfaces 15B, 15C, 15D, and 15E connected to four side edges of the top wall surface 15A. It is configured as a truncated quadrangular pyramid. The distance from the top wall surface 15A to the first holding surface 9G is formed so as to be larger than the drilling amount of the guide groove 11b formed in the auxiliary trunk portion 7 and smaller than the drilling amount of the recess 11a. Further, the area of the base portion that contacts the first holding surface 9G of the convex portion 15 is formed to be substantially the same as the opening area of the concave portion 11a, and the area of the top wall surface 15A is the same as that of the bottom wall 11A of the concave portion 11a. It is formed to be substantially the same as the area.

  The convex part 16 is provided also in the 2nd clamping surface 9H of the 2nd clamping part 9F, and since it is the substantially same shape as the convex part 15, description is abbreviate | omitted. The metal terminal 10 is also formed in the same manner as the metal terminal 9, and the first sandwiching surface 10G is provided with a convex portion protruding toward the inside of the substantially U-shape, and the second sandwiching surface 10H has A convex portion that protrudes toward the inside of the substantially U-shape is provided. Since these convex portions 17 have substantially the same shape as the convex portions 15 and 16, description thereof is omitted.

  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 between the first holding portion 9A of the metal terminal 9 and the vicinity of the connecting portion between the first holding portion 9A of the connecting portion 9B and the width of the second holding portion 9F of the connecting portion 9B and the second holding portion 9F of the connecting portion 9B. It is narrower than the vicinity of the connection point. 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 assembling 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, as shown in FIG. 6, the metal terminal 9 faces the inner surface of the connecting portion 9B and the side surface 7B of the sub barrel portion 7 substantially in parallel. Placed in a state. In this state, the metal terminal 9 is brought close to the sub barrel portion 7 so that the free end portions of the first holding portion 9A and the second holding portion 9F are along the top surface 7A and the lower surface 7F, respectively. 7 is extrapolated.

  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 narrower than the length in the z-axis direction of the auxiliary trunk portion 7, the first holding portion 9A and the second holding portion It becomes narrower than the distance between 9F. Therefore, when the metal terminal 9 is extrapolated to the sub barrel 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 holding portion 9A and the second narrow portion. Inserted between the holding portion 9F, the first holding portion 9A and the second holding portion 9F can be along the top surface 7A and the lower surface 7F without contacting the side surface 7B.

  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 15 and the convex portion 16 are brought into contact with the first inclined surface 7G and the second inclined surface 7H, and are guided along the inclined surface 11b. And it moves to the opening part of the guide groove 12b. The opening portion opened in the middle of the first inclined surface 7G of the guide groove 11b is formed so that the groove width is wider than one side of the substantially square recess 11a. Further, the top wall surface 15A of the convex portion 15 is formed such that the width of one side thereof is narrower than the one side of the concave portion 11a. Therefore, since the width of the guide groove 11b is sufficiently large with respect to the top wall surface 15A of the convex portion 15, even if the position of the convex portion 15 in the y-axis direction is slightly shifted, the convex portion 15 can be easily placed in the guide groove 11b. It becomes possible to guide.

  Further, as shown in FIG. 7, when the convex portion 15 is inserted into the guide groove 11b and the metal terminal 9 is further brought closer to the sub trunk portion 7, the side wall 11G-1 (FIG. 5) and the side wall of the guide groove 11b Since 11G-2 (FIG. 5) is gradually narrowed toward the recess 11a, the protrusion 15 is guided by the side wall 11G-1 and the side wall 11G-2 and is collinear with the recess 11a in the x-axis direction. Will be placed. Similarly to the convex portion 15, the convex portion 16 is guided into the guide groove 12 b.

  Since the protruding amount of the convex portion 15 and the convex portion 16 is larger than the drilling amount of the guide groove 11b and the guide groove 12b, the convex portion 15 and the convex portion 16 are guided into the guide groove 11b and the guide groove 12b. The distance between the first holding surface 9G and the second holding surface 9H provided in the holding portion 9A and the second holding portion 9F increases. Here, as shown in FIG. 6, assuming that the protruding amount of the convex portion 15 is T and the drilling amount of the guide groove 11b is t (T> t), the first holding portion 9A and the second holding portion 9A according to the embodiment are provided. Each of the holding portions 9F bends by Tt. In the case of using the conventional sub barrel portion and the metal terminal having no guide groove, the first holding portion is bent by the protruding amount T of the convex portion because there is no guide groove.

  When the amount of bending of the first holding portion and the second holding portion is large, plastic deformation is likely to occur. In the case of plastic deformation, even if the convex portion and the concave portion are engaged, it is impossible to obtain a sufficient holding force by the first holding portion and the second holding portion. In addition, the first holding part and the second holding part of the metal terminal are the portions that come into contact with the mounting surface of the board (not shown), but the first holding part and the second holding part are mounted with plastic deformation. When it comes into contact with the surface, it cannot come into surface contact with the mounting surface, and cobraness will be reduced.

  Therefore, by forming the guide groove 11b and the guide groove 12b according to the present embodiment, it is possible to reduce the amount of bending of the first holding portion 9A and the second holding portion 9F, thereby suppressing plastic deformation, and coplanarity. Can be improved.

  Further, the bending amount of the first holding part 9A and the second holding part 9F and the force for holding the auxiliary body part 7 cause the first holding part 9A and the second holding part 9F to act as a leaf spring. Therefore, there is a proportional relationship. The reaction force at the time of extrapolating the metal terminal 9 to the auxiliary body part 7 is mainly the first holding part 9A and the second holding part 9A and the second holding part 9F holding the auxiliary body part 7 by the first holding part 9A and the second holding part 9F. This is caused by friction between the two sandwiching portions 9F and the sub trunk portion 7. Therefore, by reducing the amount of bending, the friction between the first holding portion 9A and the second holding portion 9F and the auxiliary body portion 7 when the metal terminal 9 is extrapolated to the auxiliary body portion 7 is reduced. As a result, the metal terminal 9 can be extrapolated to the sub barrel portion 7 with a smaller force, and the occurrence of core chipping or the like due to the metal terminal 9 coming into strong contact with the sub barrel portion 7 is suppressed.

  As shown in FIG. 8, the metal terminal 9 is further brought closer to the sub trunk portion 7 from the state where the convex portion 15 and the convex portion 16 are inserted into the guide groove 11 b and the guide groove 12 b, respectively. Is inserted into the recess 11a and the recess 12f. In this case, since the amount of the guide groove 11b is less than the amount of the recess 11a, a step is formed on the side wall 11B where the guide groove 11b opens into the recess 11a. When the convex portion 15 is engaged with the concave portion 11a, the convex portion 15 is accommodated in the step, and the convex portion 15 does not return outside the step, that is, into the guide groove 11b unless a force is applied from the outside.

  When the convex portion 15 is inserted into the concave portion 11a, the side wall 11B and the side wall surface 15B, the side wall 11C and the side wall surface 15C, the side wall 11D and the side wall surface 15D, and the side wall 11E and the side wall surface 15E face each other. Since the area on the first holding surface 9G of the convex part 15 and the opening area of the concave part 11a (FIG. 4) are substantially the same area, at least the side walls 11B, 11C, 11D and 11E of the concave part 11a, respectively. And the corners formed by the side wall surfaces 15B, 15C, and 15D of the convex portion 15 are in contact with each other, and the convex portion 15 rotates with respect to the concave portion 11a. The position is specified without moving. The convex portion 16 and the guide groove 12b are similarly engaged. Therefore, the position of the metal terminal 9 provided with the convex portion 15 and the convex portion 16 with respect to the sub trunk portion 7 in which the concave portion 11a and the concave portion 12f are formed is specified, and the play of the metal terminal 9 with respect to the sub trunk portion 7 is also suppressed. The

  Moreover, since the side walls 11B to 11E and the side wall surfaces 15B to 15E are respectively a side surface and a side wall of a truncated quadrangular pyramid, they are configured by inclined surfaces and slant walls. Since the concave portion 11a and the convex portion 15 are in contact with and engaged with the respective side wall surfaces, the top surface 7A on which the concave portion 11a is formed and the convex portion 15 by force such as vibration and impact. There is no deviation from the first sandwiching surface 9G provided with. However, for example, a deviation occurs between the top surface 7A and the first holding surface 9G due to the bending of the substrate after the coil component 1 is mounted on the substrate or the expansion and contraction of the magnetic core 2 and the metal terminal 9 due to the change in atmosphere. If the engagement between the concave portion 11a and the convex portion 15 is released and no displacement occurs between the top surface 7A and the first holding surface 9G when a strong force is generated, the periphery of the concave portion 11a of the magnetic core 2 and the like There is a risk of core chipping or cracking.

  In the coil component 1 according to this embodiment, the side walls 11B to 11E and the side wall surfaces 15B to 15E, where the concave portion 11a and the convex portion 15 abut, are the side surfaces and the side walls of the truncated quadrangular pyramid, respectively. And a slant wall. Therefore, when a large force in the surface direction is applied between the top surface 7A and the first holding surface 9G, for example, the side wall 11B of the concave portion 11a and the side wall surface 15B of the convex portion 15 can be shifted in the slope direction. This displacement in the slope direction causes a displacement between the top surface 7A and the first holding surface 9G, absorbs the force generated between the concave portion 11a and the convex portion 15, and removes a core chip or the like. It becomes possible to suppress.

  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 coupled to the metal terminal 9 and the metal terminal 10.

  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, as shown in FIG. 2, the single plate-like core 20 is fixed to the top surfaces 5A and 5A of the main body portions 6 and 5 of the flange portions 4 and 4 with an adhesive, A closed magnetic path may be formed by the plate core 20 and the magnetic 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 top 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. The

  The magnetic core 2 is formed 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.

  Although the coil component convex part 15-convex part 18 concerning this Embodiment were provided in the shape of a truncated quadrangular pyramid, it is not restricted to this, For example, as shown in FIG. May be formed. Moreover, as shown in FIG. 10, the convex part 22 which protrudes in the shape of a rectangular parallelepiped may be sufficient as a top surface. Also in these convex parts 21 and convex parts 22, it is possible to obtain the same effect as the convex parts 15 shown in the embodiment.

The top view of the coil components concerning embodiment. The disassembled perspective view of the common mode filter containing the coil components concerning embodiment. Sectional drawing of the magnetic core of the coil components concerning embodiment. The plane detailed drawing of the recessed part periphery of the coil components concerning embodiment. Sectional detail drawing of the periphery of the recessed part of the coil components concerning embodiment. The side view showing the state before engagement with the sub trunk | drum of the coil components concerning embodiment, and a metal terminal. The side view showing the state in the middle of engagement with the sub trunk | drum and metal terminal of the coil components concerning embodiment. The side view showing the engagement completion state of the sub trunk | drum of the coil component concerning embodiment, and a metal terminal. The side view of the surroundings of the 1st and 2nd clamping part of the coil components concerning a 1st modification. The side view of the surroundings of the 1st and 2nd clamping part of the coil components concerning a 2nd modification.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Coil component 2 Magnetic core 3A Conductive wire 3B Conductive wire 4 Collar part 5 Winding part 5D Side surface 5E Side surface 5F Bottom surface 6F Lower surface 6 Main trunk | drum 6A Top surface 6B Side surface 6C Side surface 6D Side surface 6E Side surface 7 Subsurface 7B Side surface 7B 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 8 Sub trunk 8A Top surface 8B Side surface 8C Side surface 8E Side surface 8F Lower surface 8G First inclined surface 8H Second Inclined surface 8I First inclined introduction surface 8J Second inclined introduction surface 9 Metal terminal 9A First holding portion 9B Connection portion 9F Second holding portion 9G First holding surface 9H Second holding surface 9I Section 10 Metal terminal 10A First holding portion 10B Connecting portion 10F Second holding portion 10G First holding surface 10H Second holding surface 10I Section 11a Recess 11b Guide groove 11A Bottom wall 11B Side wall 11C Side wall 11D Side wall 11E side wall 11F groove bottom wall 11G-1 side wall 11G-2
Side wall 12f Concave part 12b Guide groove 13a Concave part 13b Guide groove 14f Concave part 14b Guide groove 15 Convex part 15A Top wall surface 15B Side wall face 15C Side wall face 15D Side wall face 15E Side wall face 16 Convex part 20 Plate core

Claims (5)

A core provided with a winding core part, and a collar part provided on both ends of the winding core part and having one surface and the other surface facing the one surface;
A first clamping part extending in parallel to the one surface and having a first clamping surface; a second clamping part extending in parallel to the other surface and having a second clamping surface; the first clamping part and the second clamping part And a metal terminal that sandwiches the one surface and the other surface by the first sandwiching surface and the second sandwiching surface when attached to the collar portion,
A coil component comprising: a conductive wire wound around the core portion and having both ends connected to the metal terminal;
A recess is formed in at least one surface of the one surface or the other surface and extends from the upstream edge of the flange in the mounting direction when the metal terminal is mounted to the flange to the recess. A guide groove extending in the mounting direction and shallower than the recess is formed on the at least one surface where the recess is formed,
At least one of the first holding part and the second holding part has a protrusion that can be slidably engaged with the guide groove when the metal terminal is attached to the flange part, and can be locked to the recessed part. A coil component, characterized in that the portion is protruded.   The concave portion is formed on both surfaces of the one surface and the other surface, and the convex portion protrudes from both surfaces of the first sandwiching surface and the second sandwiching surface. Coil parts.   The coil component according to claim 1 or 2, wherein a groove width at the end edge portion of the guide groove is larger than a width of the concave portion.   The convex portion is formed in a truncated pyramid shape, and the concave portion is drilled in a truncated pyramid shape, and the corner portion formed in the convex portion and the corner portion drilled in the concave portion are in contact with each other. The coil component according to any one of claims 1 to 3, wherein the coil component is possible.   5. The coil component according to claim 1, wherein a width of the guide groove is gradually increased from the recess toward the end edge. 6.

Images