JP4702601B2 - Coil parts - Google Patents

Description

  The present invention relates to a coil component used for various electronic devices and the like.

  Along with miniaturization and high performance of various electronic devices, coil components are required to be small and have a stable inductance value. In order to meet such requirements, conventional coil components include a core, a bobbin-type drum core having an upper flange and a lower flange provided at both axial ends of the core, and an outer periphery of the drum core. Some have a cylindrical ring core (see, for example, Patent Document 1). In such a coil component, the part facing the lower collar part of the ring core and the lower collar part of the drum core are bonded with an adhesive, and the part facing the upper collar part of the ring core and the upper collar part of the drum core are joined together. Bonded with an adhesive. Then, a predetermined gap is formed between the drum core and the ring core by the adhesive to obtain a desired inductance value.

JP 2001-338818 A

  However, in the conventional coil component, in the reflow process when fixing the coil component on the circuit board, the adhesive expands and contracts, and the gap between the exterior core and the drum core fluctuates to obtain a desired inductance value. There was a problem that it was not possible. Furthermore, since the ring core is formed in a cylindrical shape, it is necessary to fit the drum core into the ring core at the time of assembling the coil parts, and it is difficult to position the ring core, and the manufacturing is complicated.

  An object of the present invention is to provide a coil component that can stabilize an inductance value even after circuit board mounting and is easy to manufacture.

  In order to solve the above-described problems, the present invention provides a winding, a winding core wound around a side surface extending in the axial direction, and a direction positioned at both ends of the winding core and perpendicular to the axis. A bobbin-shaped drum core having first and second flanges extending to the outer periphery, an outer core disposed at a predetermined distance from the drum core so as to surround the drum core, and the outer core connected to the outer core A coil component having a metal terminal is provided.

  Here, the exterior core includes a first exterior core and a second exterior core that are disposed to face each other in the diameter direction of the drum core. The first exterior core is a first inner surface that is opposed to the first and second flanges, and a first inner surface that is located on the outer side in the diameter direction of the drum core with respect to the first inner surface and extends in parallel with the shaft. And an outer surface. The second outer core is a second inner surface that is opposed to the first and second flanges, and is a second inner surface that is located on the outer side in the diameter direction of the drum core with respect to the second inner surface and extends in parallel with the shaft. And an outer surface.

  The metal terminal has a first metal terminal and a second metal terminal. The first metal terminal has a first board mounting portion, at least one first fixing portion, and at least one second fixing portion. A part of the first board mounting portion is disposed opposite to one end of the first exterior core in the axial direction and one end of the second exterior core in the axial direction, and extends in a direction orthogonal to the axial direction. The first fixing portion extends in the axial direction from the first substrate mounting portion so as to be along any one or more of the first outer surfaces. The second fixing portion extends in the axial direction from the first substrate mounting portion so as to extend along any one or more of the second outer surfaces.

  The second metal terminal has a second substrate mounting portion, at least one third fixing portion, and at least one fourth fixing portion. A part of the second board mounting portion is disposed opposite to one end of the first exterior core in the axial direction and one end of the second exterior core in the axial direction, and extends in a direction orthogonal to the axial direction. The third fixing portion extends in the axial direction from the second substrate mounting portion so as to extend along any one or more of the first outer surfaces. The fourth fixing portion extends in the axial direction from the second substrate mounting portion so as to extend along any one or more of the second outer surfaces.

  The first fixing portion and the third fixing portion of the coil component and the first outer surface of the first exterior core are connected via an adhesive, and the second fixing portion, the fourth fixing portion, and the second fixing portion. The second outer surface of the exterior core is connected via an adhesive. Further, the first inner surface of the first outer core and the second inner surface of the second outer core and one of the first flange portion or the second flange portion are connected via an adhesive.

  In the coil component, the drum core and the outer core are connected with an adhesive only between one of the first flange portion or the second flange portion and the first and second inner side surfaces of the first and second outer cores. The The first exterior core and the second exterior core are bonded to the first to fourth fixing portions of the first and second metal terminals, respectively, and are connected to each other. The winding is connected to the first and second connection portions of the first and second metal terminals and supplied with current. The drum core and the first and second outer cores form a magnetic path by the current flowing through the winding, and the coil component exhibits a predetermined inductance value.

  According to the above configuration, the drum core and the first and second exterior cores are connected via the adhesive only between one of the first or second flange and the first and second inner side surfaces of the exterior core. Therefore, when the coil component is mounted on the substrate, the change in the gap between the drum core and the first and second exterior cores due to the expansion or contraction of the adhesive in the reflow process can be reduced. Therefore, there is an effect of reducing the fluctuation of the inductance value caused by the change in the gap.

  Since the first and second exterior cores are connected to each other by the first and second metal terminals, the strength of the coil component can be improved. Further, since the outer core is divided, the first and second outer cores may be sequentially arranged around the drum core and assembled. Therefore, it is not necessary to fit the drum core into the inner peripheral portion of the outer core, and it is easy to manufacture, and it is not necessary to provide a margin of dimension for fitting the drum core in the inner peripheral portion of the outer core. is there.

  In addition, the present invention provides a winding, a core portion in which the winding is wound on a side surface portion extending in the axial direction, and a first core portion positioned at both ends of the core portion and extending in a direction perpendicular to the axis. A bobbin-shaped drum core having first and second flanges; an outer core disposed at a predetermined distance from the drum core so as to surround the drum core; and a metal terminal connected to the outer core. Coil parts are provided.

  Here, the exterior core includes a first exterior core and a second exterior core that are disposed to face each other in the diameter direction of the drum core. The first exterior core has a first end surface, a second end surface, a first inner surface, and a first outer surface, and the second outer core has a third end surface, a fourth end surface, a second inner surface, and a second outer surface. have. The first end surface of the first exterior core is located on substantially the same plane as the outer end surface of the first collar portion. The second end surface is located substantially on the same plane as the outer end surface of the second collar. The first inner surface is opposed to the first and second collars. The first outer surface is located on the outer side in the diameter direction of the drum core with respect to the first inner surface, and includes at least two surfaces extending in parallel with the axis.

  The third end surface of the second exterior core is located on substantially the same plane as the outer end surface of the first collar. The fourth end surface is located substantially on the same plane as the outer end surface of the second collar portion. The second inner surface is opposed to the first and second collars. The second outer surface is located on the outer side in the diameter direction of the drum core with respect to the second inner surface, and includes at least two surfaces extending in parallel with the axis.

  At this time, the first substrate mounting portion of the first metal terminal and the second substrate mounting portion of the second metal terminal extend in a direction orthogonal to the axial direction, and the first end surface, the third end surface, and the first flange portion, They are arranged opposite to each other.

  Moreover, the 1st board | substrate mounting part, the 1st collar part, the 2nd board | substrate mounting part, and the 1st collar part are connected via the adhesive agent. The first fixing portion, the third fixing portion, and the first outer surface are connected via an adhesive, and the second fixing portion, the fourth fixing portion, and the second outer surface are connected via an adhesive. Connected.

  In the coil component, the drum core and the outer core are connected by bonding the first and second metal terminals and the first flange, and the first and second metal terminals and the first and second outer cores, respectively. Is done. The first and second outer cores are bonded to the first and fourth fixing portions of the first and second metal terminals, respectively, and are connected to each other. The winding is connected to the first and second connection portions of the first and second metal terminals and supplied with current. The drum core and the first and second outer cores form a magnetic path by the current flowing through the winding, and the coil component exhibits a predetermined inductance value.

  According to the above configuration, since the drum core and the first and second exterior cores are connected to each other by being bonded to the first and second metal terminals, respectively, the adhesive by the reflow process when the coil component is mounted on the board It is possible to reduce the change in the gap between the drum core and the outer core caused by the expansion or contraction. Therefore, there is an effect of reducing the fluctuation of the inductance value caused by the change in the gap.

  Since the first and second exterior cores are connected to each other by the first and second metal terminals, the strength of the coil component can be improved. Further, since the exterior core is divided into the first and second exterior cores, the first and second exterior cores may be sequentially arranged around the drum core and assembled. Therefore, it is not necessary to fit the drum core into the inner peripheral portion of the outer core, and it is easy to manufacture, and it is not necessary to provide a margin of dimension for fitting the drum core in the inner peripheral portion of the outer core. is there.

  In addition, the first inner surface of the first outer core, the second inner surface of the second outer core, the first outer core of the first collar and the position facing the second outer core, the first of the second outer core. It is preferable that at least one protrusion is formed in at least one of the positions facing the exterior core and the second exterior core.

  According to such a configuration, the protrusion is provided, the drum core and the first and second exterior cores are disposed so that the surface facing the protrusion is in contact, and a desired gap is provided between the drum core and the first and second exterior cores. To form and maintain. With such a configuration, the inductance value of the coil component can be adjusted to a desired value, and the distance between the drum core and the exterior core can be prevented from changing to further stabilize the inductance value of the coil component. It becomes possible.

  The first exterior core has a first exterior core end located at a first circumferential position of the drum core, and a second exterior core end located at a second circumferential position. The second exterior core is located at the third position in the circumferential direction of the drum core, located at the third exterior core end facing the first exterior core end, and at the fourth position in the circumferential direction. And a fourth exterior core end facing the second exterior core end. At this time, a first space is defined between the first exterior core end and the third exterior core end, and between the second exterior core end and the fourth exterior core end. The second space portion is defined. The first metal terminal has a first connection portion arranged in the first space portion, and the second metal terminal has a second connection portion arranged in the second space portion. The first and second connection portions are electrically connected to the windings, respectively, and extend from the first or second board mounting portion.

  According to such a configuration, since the first and second connecting portions are disposed in the space between the first and second exterior cores, the inner periphery is more than the case where the connecting portions are disposed on the outer edge portion of the exterior core. A connecting portion is arranged. Therefore, the coil component can be miniaturized.

  Furthermore, in the coil component of the present invention, the winding and the first connecting portion are connected on the first connecting portion drum core side, and the winding and the second connecting portion are the second connecting portion. It is preferable to be connected on the drum core side.

  According to this configuration, since the winding is connected on the drum core side of the first and second connecting portions, the distance between the drum core and the position where the winding is connected to the connecting portion is short. With such a configuration, the winding distance of the winding can be shortened. Therefore, since the total length of the winding is also shortened, the DC resistance of the coil component can be lowered.

  According to the coil component of the present invention, the inductance value can be stabilized even after the circuit board is mounted, and can be easily manufactured.

  Embodiments of the present invention will be described with reference to the accompanying drawings. In the following embodiments, when a coil component is mounted on a circuit board, the circuit board is positioned below the coil component, and the mounting surface of the circuit board extends in the horizontal direction. Specify the direction.

  A coil component 1 according to a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a perspective view of a coil component 1 according to the first embodiment. As shown in FIG. 1, the coil component 1 is disposed so as to cover a part of the bobbin-shaped drum core 3, the outer cores 11 and 13 provided on the outer peripheral portion of the drum core 3, and the outer surface and the lower surface of the outer cores 11 and 13. It is an inductance element having the metal terminals 23 and 31 formed.

  Hereinafter, the configuration of the coil component 1 will be described in detail. 2 shows a state where the coil component 1 is disassembled, and FIG. 3 shows a cross section taken along line III-III of FIG. In FIG. 1 and FIG. 2, the winding 15 is not shown. As shown in FIGS. 1 to 3, the drum core 3 includes a winding core portion 5, an upper flange portion 7 as a second flange portion, and a lower flange portion 9 as a first flange portion. The core 5 has a circular cross section with the axis Z as an axis, and a winding 15 is wound in a coil shape on a side surface extending in the direction of the axis Z as shown in FIG. The upper flange portion 7 and the lower flange portion 9 are respectively provided at both ends in the axial direction of the core portion 5 and have a substantially disk shape having a thickness in the axis Z direction. The core part 5, the upper collar part 7, and the lower collar part 9 are integrally formed of a ferromagnetic material such as ferrite, for example, and constitute a bobbin-shaped drum core 3.

  The exterior cores 11 and 13 are first and second exterior cores, which are formed of a ferromagnetic material such as ferrite, for example, and are arranged on the outer periphery of the drum core 3. The exterior core 11 has a columnar shape constituted by outer side surfaces 11A, 11B, 11C, an inner side surface 11D, an upper end surface 11E, a lower end surface 11F, and two side surfaces 11G, 11H as first and second exterior core end portions. There is no.

  The inner side surface 11D is a first inner side surface, faces the drum core 3, and has two protrusions 52 having the same shape. A cross section of the inner surface 11D in a plane perpendicular to the axis Z (hereinafter referred to as a horizontal cross section) has a radius larger than the radius of the upper collar portion 7 and the lower collar portion 9 with the axis Z as the center, except for the projection 52 portion. It can be part of an arc. The protrusion 52 has, for example, a substantially semicircular horizontal cross section, and is formed over the entire axis Z direction of the inner surface 11D. The exterior core 11 is disposed so that the protrusion 52 contacts the side surfaces of the upper flange portion 7 and the lower flange portion 9 of the drum core 3.

  The outer side surfaces 11A, 11B, and 11C are planes that are located on the outer side in the diameter direction of the drum core 3 with respect to the inner side surface 11D and extend in the axis Z direction. The outer side surfaces 11A, 11B, and 11C are adjacent to each other at one side to form a first outer side surface.

  The upper end surface 11E is an end surface on the upper flange portion 7 side in the axis Z direction of the exterior core 11, and the lower end surface 11F is an end surface on the lower flange portion 9 side. The side surfaces 11G and 11H corresponding to the first and second positions are both end surfaces of the outer core 11 in the circumferential direction.

  The exterior core 13 has substantially the same configuration as the exterior core 11. The outer core 13 is composed of outer side surfaces 13A, 13B, and 13C, an inner side surface 13D having protrusions 54, an upper end surface 13E, a lower end surface 13F, and two side surfaces 13G and 13H as third and fourth outer core end portions. It has a columnar shape. The outer side surfaces 13A, 13B, and 13C are second outer side surfaces, and the inner side surface 13D is a second inner side surface. The side surfaces 13G and 13H correspond to the third and fourth positions.

  The exterior cores 11 and 13 are configured such that the space portion 33 (FIG. 1) is defined between the side surface 11G and the side surface 13G, and the space portion 35 (FIG. 1) is defined between the side surface 11H and the side surface 13H. Arranged on the outer circumference at positions substantially symmetrical with respect to the axis Z. At this time, the protrusions 52 and 54 are arranged in contact with the drum core 3. The protrusions 52 and 54 are in contact with the side surface of the upper flange portion 7 and the side surface of the lower flange portion 9 of the drum core 3, and form a predetermined gap between the drum core 3 and the exterior cores 11 and 13.

  The metal terminals 23 and 31 are made of a conductive metal. The metal terminal 23 has a board mounting part 19 as a first board mounting part, exterior core fixing parts 17 and 18 as first and second fixing parts, and a connecting part 21 as a first connecting part.

  4 is a plan view of the coil component 1 as viewed from below, and FIGS. 5 and 6 are perspective views of the metal terminal 23. As shown in FIGS. , 13 and a part thereof is arranged to face the lower end surfaces 11F, 13F. The board mounting portion 19 is a flat plate having a shape in which a plane orthogonal to the axis Z bisects a regular octagon. As shown in FIG. 3, the board mounting portion 19 is connected to a part of the lower end surface 11 </ b> F via an adhesive 41 and is connected to a part of the lower end surface 13 </ b> F via an adhesive 43.

  The exterior core fixing portions 17 and 18 have a flat plate shape extending from the outer edge portion of the board mounting portion 19 in the direction of the axis Z. The exterior core fixing part 17 is located along the outer surface 11C of the exterior core 11, and is connected to the outer surface 11C of the exterior core 11 via an adhesive 41 as shown in FIG. The exterior core fixing part 18 is located along the outer surface 13C of the exterior core 13 and is connected to the outer surface 13C of the exterior core 13 via an adhesive (not shown).

  The connecting portion 21 extends from the outer edge portion of the board mounting portion 19 in the direction of the axis Z, and is provided in the space portion 33. The connecting portion 21 has a caulking portion 22 as shown in FIGS. 5 and 6 and is electrically connected to the winding 15. The caulking portion 22 extends on the same plane from the side surface of the connecting portion 21 before assembling. The upper surface 21a of the connecting portion 21 and the upper surface 22a of the caulking portion 22 are subjected to conductive plating such as solder. When assembled, the winding 15 is disposed on the upper surface 21a, and the upper surface 21a and the upper surface 22a face each other as shown in FIG. 6 from the state where the caulking portion 22 extends from the connecting portion 21 in FIG. The winding 15 is electrically connected to the connecting portion 21 by bending and crimping in this manner. Thereafter, the connecting portion 21 is raised in the direction of the arrow p in FIG. 6 and arranged so that the upper surface 21 a faces the drum core 3.

  1 to 3 again, the metal terminal 31 has substantially the same configuration as the metal terminal 23. The metal terminal 31 has a board mounting part 27 as a second board mounting part, exterior core fixing parts 25 and 26 as third and fourth fixing parts, and a connecting part 29 as a second connecting part. The board mounting portion 27 is disposed so that a part thereof is opposed to the lower end face 11F of the outer core 11 and the lower end face 13F of the outer core 13, and at least a part of the opposed parts are connected to each other via an adhesive. Yes. The exterior core fixing portion 25 is connected to the outer surface 11A of the outer core 11 via an adhesive (not shown), and the outer core fixing portion 26 is connected to the outer surface 13A of the outer core 13 via an adhesive 43. Is done. Thus, since the exterior cores 11 and 13 are connected to the metal terminals 23 and 31, respectively, they are connected and fixed to each other.

  As shown in FIG. 3, in the coil component 1 according to the present embodiment, the side surface of the lower flange 9 and the outer core 11 are bonded continuously or intermittently via an adhesive 37 in the circumferential direction. The side surface of the flange portion 9 and the outer core 13 are bonded via an adhesive 39 continuously or intermittently in the circumferential direction.

  When a current is supplied to the winding 15 of the coil component 1 as described above, the drum core 3 and the outer cores 11 and 13 together form a magnetic path and exhibit a predetermined inductance value.

  As described above, in the coil component 1 according to the first embodiment, the drum core 3 and the outer cores 11 and 13 are between the side surface of the lower flange 9 and the inner side surfaces 11D and 13D of the outer cores 11 and 13. Only through the adhesives 37, 39. Therefore, the fluctuation | variation of the clearance gap between the drum core 3 and the exterior cores 11 and 13 by the expansion | swelling and shrinkage | contraction of an adhesive agent which arises in the reflow process at the time of mounting the coil components 1 on a board | substrate can be reduced. This has the effect of reducing fluctuations in the inductance value after board mounting.

  The exterior cores 11 and 13 are connected to the exterior core fixing portions 17, 18, 25, and 26 of the metal terminals 23 and 31 via adhesives, and are connected to each other. Therefore, the strength of the coil component 1 can be improved.

  Protrusions 52 and 54 are provided on the inner side surfaces 11D and 13D of the outer cores 11 and 13, and are in contact with the side surfaces of the upper flange portion 7 or the lower flange portion 9 of the drum core 3. Therefore, a desired gap can be formed between the drum core 3 and the outer cores 11 and 13. Further, there is an effect of further reducing the fluctuation of the gap due to the expansion and contraction of the adhesive in the reflow process at the time of board mounting, and further stabilizing the inductance value.

  Further, since the outer core is divided, the first and second outer cores may be sequentially arranged around the drum core and assembled. Therefore, it is not necessary to fit the drum core into the inner peripheral portion of the outer core, and it is easy to manufacture, and it is not necessary to provide a margin of dimension for fitting the drum core in the inner peripheral portion of the outer core. is there.

  The connecting portions 21 and 29 are provided in the space portions 33 and 35, respectively, and the winding 15 is connected on the drum core 3 side of the connecting portions 21 and 29. Therefore, since the connecting portions 21 and 29 are arranged so as not to protrude from the outer periphery of the outer cores 11 and 13 and the metal terminals 23 and 31, there is an effect of downsizing the coil component 1.

  Since the winding 15 is connected on the drum core 3 side of the first connecting portion 21 and the second connecting portion 29, the distance between the drum core 3 and the position where the winding 15 is connected to the connecting portions 21 and 29. Is close. With such a configuration, the drawing distance of the winding 15 can be shortened. Therefore, since the total length of the winding 15 is also shortened, the DC resistance of the coil component 1 can be reduced.

  In addition, although the protrusions 52 and 54 are formed over the entire axis Z direction of the inner side surfaces 11D and 13D, they may be provided at least in a portion facing the side surface of the upper collar portion 7 or the side surface of the lower collar portion 9. Further, the protrusions 52 and 54 need not be formed at equal intervals in the circumferential direction.

  Next, a modification of the coil component 1 according to the first embodiment will be described with reference to FIG. FIG. 7 is a perspective view of a drum core 103 that can be used in place of the drum core 3.

  The drum core 103 has a winding core portion 5, an upper flange portion 107, and a lower flange portion 109. The winding core portion 5 has a circular cross section with the axis Z as an axis, and a winding 15 is wound in a coil shape on a side surface extending in the axis Z direction. The upper flange portion 107 and the lower flange portion 109 are respectively provided at both ends of the core portion 5 and have a substantially disk shape having a thickness in the axis Z direction. Protrusions 111, 111, 113, 113 are provided at substantially equal intervals on the outer peripheral surface of the upper flange 107. Similarly, protrusions 115, 115, 117, and 117 are provided at substantially equal intervals on the outer peripheral surface of the lower flange portion 109. The core part 5, the upper collar part 7, and the lower collar part 9 are integrally formed of a ferromagnetic material such as ferrite, for example, and constitute a drum core 103.

  Further, when the drum core 103 having this shape is used, the protrusions 52 and 54 of the outer cores 11 and 13 may be omitted. The drum core 103 is disposed so that the protrusions 111 and 115 are in contact with the inner side surface 11D of the exterior core 11, and the protrusions 113 and 117 are disposed in contact with the inner side surface 13D of the exterior core 13. With such a configuration, a predetermined gap is formed between the drum core 103 and the outer cores 11 and 13.

  As described above, by providing the drum core 103 with the protrusions 111, 113, 115, 117, a predetermined gap can be formed between the drum core 103 and the outer cores 11, 13, and the gap is maintained. In addition, the inductance value of the coil component can be further stabilized.

  In the coil component 1 according to the first embodiment and its modification, the adhesives 41 and 43 are also provided between the lower end surfaces 11F and 13F of the exterior cores 11 and 13 and the board mounting portions 19 and 27. However, it may be provided only between the outer surface of the outer cores 11 and 13 and the outer core fixing portions 17, 18, 25 and 26.

  Further, the substrate mounting portions 19 and 27 also extend to a portion facing the lower end surface of the lower flange portion 9 of the drum core 3, but at least a part thereof opposes the lower end surfaces 11 F and 13 F of the exterior cores 11 and 13. It does not have to extend below the lower flange 9.

  Further, the protrusions 111, 113, 115, 117 may not be formed at equal intervals in the circumferential direction.

  Next, the coil component 200 according to the second embodiment will be described with reference to FIGS. 1, 2, and 4 to 8. Since the coil component 1 and the coil component 200 are substantially the same except that the position of the adhesive is different, the same numbers are given and the description is omitted.

  As shown in FIG. 8, the lower flange portion 9 has an outer end surface 9 a, and a part of the lower flange portion 9 faces part of the board mounting portions 19 and 27 of the metal terminals 23 and 31. The outer end face 9 a and the board mounting part 19 are connected via an adhesive 51. The outer end face 9 a and the board mounting part 27 are connected via an adhesive 53.

  The exterior core fixing portion 17 of the metal terminal 23 and the outer surface 11C of the exterior core 11 and the lower end surface 11F of the exterior core 11 as the first end surface and the board mounting portion 19 are connected via an adhesive 55. Yes. Similarly, the outer core fixing portion 18 and the outer side surface 13C of the outer core 13, and the lower end surface 13F of the outer core 13 serving as the third end surface and the board mounting portion 19 are connected via an adhesive (not shown). It is connected.

  The outer core fixing portion 26 of the metal terminal 31 and the outer side surface 13A of the outer core 13, and the lower end surface 13F of the outer core 13 and the board mounting portion 27 are connected via an adhesive 57. Similarly, the outer core fixing portion 25 and the outer surface 11A of the outer core 11, and the lower end surface 11F of the outer core 11 and the board mounting portion 27 are connected via an adhesive (not shown). Thus, since the exterior cores 11 and 13 are connected to the metal terminals 23 and 31, respectively, they are connected and fixed to each other.

  In the coil component 200, when a current flows through the winding 15, the drum core 3 and the outer cores 11 and 13 form a magnetic path and exhibit a predetermined inductance value.

  As described above, according to the coil component 200 according to the second embodiment, the lower flange portion 9 and the metal terminals 23 and 31 are connected via the adhesives 51 and 53 and the like. Further, the metal terminals 23 and 31 and the outer cores 11 and 13 are connected via adhesives 55 and 57 and the like.

  According to the above configuration, in addition to the effect of the coil component 1 according to the first embodiment, since the drum core 3 and the outer cores 11 and 13 are not directly connected via the adhesive, the board mounting of the coil component 200 is performed. It is possible to further reduce the fluctuation of the inductance value due to the expansion and contraction of the adhesive in the reflow process at the time.

  In addition, the coil component of this invention is not limited to embodiment mentioned above, A various deformation | transformation and improvement are possible in the range described in the claim. For example, the outer surfaces of the outer cores 11 and 13 have three surfaces in the coil components 1 and 200, but may be any number as long as the number is two or more. The outer core fixing portions 17, 18, 25, and 26 of the metal terminals 23 and 31 are provided two for each outer core, but may be two or more. Moreover, the outer surface of the exterior core which an exterior core fixing part opposes is not limited to the said example.

  Moreover, although the exterior core demonstrated the example of 2 division, 3 or more division may be sufficient. In that case, it is preferable to increase the number of metal terminals or change the configuration so that the exterior cores can be connected to each other.

  As for the protrusion provided on the exterior core or the collar, at least one projection is formed on any one of the inner surface of the exterior cores 11 and 13, the side of the upper collar 7, and the side of the lower collar 9. Good.

  Further, the protrusion may not be provided, and a predetermined gap may be secured by a jig for forming a gap between the drum core 3 and the outer cores 11 and 13 when the coil component 1 is manufactured.

  The coil component of the present invention is used in various electronic devices.

The perspective view of the coil component 1 by the 1st Embodiment of this invention. The exploded view of the coil component of FIG. Sectional drawing in the III-III plane of FIG. The top view which looked at the coil component of FIG. 1 from the downward direction. The figure before the assembly of the connection part of the metal terminal of the coil components by the 1st Embodiment of this invention. The figure explaining the method to fix a coil | winding to the crimping part of the connection part of the metal terminal of the coil components by the 1st Embodiment of this invention. It is a perspective view of the drum core by the modification of the 1st Embodiment of this invention. It is a longitudinal cross-sectional view of the coil component by the 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,200 Coil components 3, 103 Drum core 5 Core part 7, 107 Upper collar part 9, 109 Lower collar part 9a Outer end face 11, 13 Exterior core 11A, 11B, 11C, 13A, 13B, 13C Outer side face 11D, 13D Inside Side face 11E, 13E Upper end face 11F, 13F Lower end face 11G, 11H, 13G, 13H Side face 15 Windings 17, 18, 25, 26 Exterior core fixing part 19, 27 Board mounting part 21, 29 Connecting part 23, 31 Metal terminal 33, 35 Space 37, 39, 41, 43, 51, 53, 55, 57, Adhesive 52, 54, 111, 113, 115, 117 Projection

Claims (5)

Windings,
A core portion in which the winding is wound on a side surface portion extending in the axial direction, and first and second flange portions that are located at both ends of the core portion and extend in a direction orthogonal to the axis A bobbin-shaped drum core having
An outer core disposed at a predetermined interval from the drum core so as to surround the drum core; and
A metal terminal connected to the outer core,
The outer core is a coil component including a first outer core and a second outer core that are arranged to face each other in the diameter direction of the drum core,
The first exterior core is positioned at a diametrically outer side of the drum core than the first inner surface, facing the first and second flanges, and extends in parallel with the shaft. A first outer surface comprising a surface,
The second exterior core is positioned on the outer side in the diameter direction of the drum core with respect to the second inner surface facing the first and second flanges, and extends in parallel with the shaft. A second outer surface comprising a surface,
The metal terminal has a first metal terminal and a second metal terminal,
A part of the first metal terminal is disposed opposite to one end of the first exterior core in the axial direction and one end of the second exterior core in the axial direction, and extends in a direction orthogonal to the axial direction. One substrate mounting portion, at least one first fixing portion extending in the axial direction from the first substrate mounting portion so as to be along any one or more of the first outer surfaces, and the second outer surface Including at least one second fixing portion extending in the axial direction from the first substrate mounting portion so as to extend along any one or more surfaces,
A portion of the second metal terminal is disposed opposite to one end of the first exterior core in the axial direction and one end of the second exterior core in the axial direction, and extends in a direction orthogonal to the axial direction. Two substrate mounting portions, at least one third fixing portion extending in the axial direction from the second substrate mounting portion so as to be along any one or more of the first outer surfaces, and the second outer surface And at least one fourth fixing portion extending in the axial direction from the second substrate mounting portion so as to extend along any one or more surfaces,
The first fixing part, the third fixing part, and the first outer surface of the first exterior core are connected via an adhesive, the second fixing part, the fourth fixing part, The second outer surface of the second exterior core is connected via an adhesive,
The first inner side surface of the first outer core and the second inner side surface of the second outer core and one of the first flange portion or the second flange portion are connected via an adhesive. Coil parts characterized by that. Windings,
A core portion in which the winding is wound on a side surface portion extending in the axial direction, and first and second flange portions that are located at both ends of the core portion and extend in a direction orthogonal to the axis A bobbin-shaped drum core having
An outer core disposed at a predetermined interval from the drum core so as to surround the drum core; and
A metal terminal connected to the outer core,
The outer core is a coil component including a first outer core and a second outer core that are arranged to face each other in the diameter direction of the drum core,
The first exterior core includes a first end surface located substantially on the same plane as the outer end surface of the first collar portion, and a second end surface located on substantially the same plane as the outer end surface of the second collar portion. A first inner surface facing the first and second flanges, and a first outer surface comprising at least two surfaces that are positioned on the outer side in the diameter direction of the drum core than the first inner surface and extend in parallel with the shaft. Side, and
The second exterior core includes a third end surface located substantially on the same plane as the outer end surface of the first collar portion, and a fourth end surface located substantially on the same plane as the outer end surface of the second collar portion. A second inner surface facing the first and second flanges, and a second outer surface comprising at least two surfaces that are located on the diametrically outer side of the drum core than the second inner surface and extend parallel to the shaft. Side, and
The metal terminal has a first metal terminal and a second metal terminal,
The first metal terminal extends in a direction orthogonal to the axial direction, and is disposed opposite to the first end surface of the first exterior core, the third end surface of the second exterior core, and the first flange portion. A first substrate mounting portion; at least one first fixing portion extending in the axial direction from the first substrate mounting portion so as to extend along one or more of the first outer surfaces; and the second outer surface. And at least one second fixing portion extending in the axial direction from the first substrate mounting portion so as to extend along any one or more of the surface,
The second metal terminal includes a first end surface of the first outer core, a third end surface of the second outer core, and a second board mounting portion disposed opposite to the first flange portion, and the first outer surface. The at least one third fixed portion extending in the axial direction from the second substrate mounting portion so as to be along any one or more of the side surfaces, and the first so as to be along any one or more of the second outer surfaces. And at least one fourth fixing portion extending in the axial direction from the two substrate mounting portions,
The first substrate mounting portion and the first flange portion are connected via an adhesive, and the second substrate mounting portion and the first flange portion are connected via an adhesive,
The first fixing part, the third fixing part, and the first outer surface of the first exterior core are connected via an adhesive, the second fixing part, the fourth fixing part, The coil component characterized by being connected to the second outer surface of the second exterior core via an adhesive.   The first inner surface of the first outer core, the second inner surface of the second outer core, the position of the first collar facing the first outer core and the second outer core, and the first At least one protrusion is formed in at least any one of the positions of the first collar and the second armor facing each other, and the predetermined interval is maintained by the protrusion. The coil component according to claim 1 or 2. The first exterior core includes a first exterior core end portion located at a first circumferential position of the drum core, and a second exterior core end portion located at a second circumferential position. Have
The second exterior core is located at a third position in the circumferential direction of the drum core, at a third exterior core end facing the first exterior core end, and at a fourth position in the circumferential direction. A fourth exterior core end positioned and facing the second exterior core end;
A first space is defined between the first exterior core end and the third exterior core end,
A second space is defined between the second exterior core end and the fourth exterior core end,
The first metal terminal is electrically connected to the winding, and has a first connecting portion extending from the first board mounting portion and disposed in the first space portion,
The second metal terminal includes a second connecting portion electrically connected to the winding and extending from the second board mounting portion and disposed in the second space portion. The coil component according to 1 or 2.   The winding and the first connecting portion are connected on the drum core side of the first connecting portion, and the winding and the second connecting portion are the second connecting portion of the second connecting portion. The coil component according to claim 4, wherein the coil component is connected on a drum core side.

Images