Coil parts

Abstract

To provide a coil component having a structure that makes suction by a mounter stabler.SOLUTION: A coil component 100 comprises a core molding 10, a coil 60, and a metal terminal 50 electrically connected to the coil 60, and the metal terminal 50 has a first planar part 51 arranged along a side face of the core molding 10, a second planar part 52 concatenated to an upper end of the first planar part 51 and arranged along a top surface 12, and a third planar part 53 concatenated to a lower end of the first planar part 51 and arranged along a mount surface 11, wherein a tip edge of the second planar part 52 is a first recessed part 52a, a recessed part 30 where the second planar part 52 is arranged is formed on the top surface 12, and a region of the recessed part 30 which corresponds to the first recessed part 52a is a second recessed part 30a along the first recessed part 52a.SELECTED DRAWING: Figure 8

Description

[Technical field]

[0001] The present invention relates to a coil component. [Background technology]

[0002] An example of a coil component is described in Patent Document 1. The coil component of Patent Document 1 includes a core molded body made of a magnetic material, a coil having an embedded portion embedded in the core molded body and a protruding portion protruding from the core molded body, and a metal terminal electrically connected to the protruding portion. The core molded body has a mounting surface, an upper surface facing the opposite side to the mounting surface, and a side surface perpendicular to the mounting surface and the upper surface. The metal terminal has a first planar portion arranged along the side surface of the core molded body, a second planar portion connected to the upper end of the first planar portion and arranged along the upper surface of the core molded body, and a third planar portion connected to the lower end of the first planar portion and arranged along the mounting surface of the core molded body. A recess is formed on the upper surface of the core molded body, and the second planar portion of the metal terminal is arranged in this recess. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP2007-273739 Public Relations Summary of the Invention [Problem to be solved by the invention]

[0004] During mounting, the coil components as described above may be sucked and held by a mounter equipped with a suction nozzle. According to the investigations of the present inventors, there is room for improvement in the structure of the coil component in Patent Document 1 in terms of more stable attachment by the mounter.

[0005] The present invention has been made in consideration of the above-mentioned problems, and provides a coil component having a structure that enables more stable attraction by a mounter. [Means for solving the problem]

[0006] According to the present invention, there is provided a core molded body formed of a magnetic material and having a mounting surface, a top surface facing the opposite side to the mounting surface, and a side surface intersecting the mounting surface and the top surface; A coil having an embedded portion embedded in the core molded body and a protruding portion protruding from the core molded body; a metal terminal having a first planar portion disposed along the side surface, a second planar portion connected to an upper end of the first planar portion and disposed along the upper surface, and a third planar portion connected to a lower end of the first planar portion and disposed along the mounting surface, the metal terminal being electrically connected to the protrusion; Equipped with the core molded body is formed as a whole integrally by compression-molding a powder containing the magnetic material such that the embedded portion is embedded inside the core molded body, a tip edge of the second planar portion is a first concave portion formed in a planar shape recessed toward an upper end side of the first planar portion, which is a base end side of the second planar portion; a recess in which the second planar portion is disposed is formed on the upper surface, In the coil component, a portion of the recess corresponding to the first recess is a second recess formed in a planar shape that fits along the first recess. Effect of the Invention

[0007] According to the present invention, it is possible to perform suction by the mounter more stably. [Brief description of the drawings]

[0008] [Figure 1] 1A and 1B are perspective views (a front plan view and a right side view) of a coil component according to an embodiment. [Diagram 2] FIG. 2 is a front view of the coil component according to the embodiment. [Diagram 3] FIG. 4 is a rear view of the coil component according to the embodiment. [Figure 4] FIG. 2 is a left side view of the coil component according to the embodiment. [Diagram 5] FIG. 2 is a right side view of the coil component according to the embodiment. [Figure 6] FIG. 2 is a plan view of the coil component according to the embodiment. [Figure 7] FIG. 2 is a bottom view of the coil component according to the embodiment. [Figure 8] FIG. 8(a) is a plan view of the coil component according to the embodiment, and FIG. 8(b) is a front view of the coil component according to the embodiment. [Figure 9] 8(a) is a cross-sectional view (front cross-sectional view) taken along line AA in FIG. 8(a). [Figure 10] FIG. 2 is a partially enlarged plan view of the coil component according to the embodiment. [Figure 11] FIG. 2 is a perspective view showing a core molded body and a protruding portion of a coil of the coil component according to the embodiment. [Figure 12] FIG. 2 is a plan view of a core molded body and a coil of the coil component according to the embodiment. [Figure 13] FIG. 4 is a bottom view of the core molded body and the coil of the coil component according to the embodiment. [Figure 14] FIG. 2 is a perspective view of a metal terminal of the coil component according to the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of the present invention will be described with reference to FIGS. In addition, in all drawings, similar components are given the same symbols and descriptions are omitted as appropriate.

[0010] As shown in any one of Figures 1 to 14, the coil part 100 of this embodiment comprises a core molding 10 formed of a magnetic material, a coil 60 having an embedded portion 61 (Figures 8(a), 9, etc.) embedded in the core molding 10 and protruding portions (first protruding portion 62, second protruding portion 63 (Figure 8(a), etc.)) protruding from the core molding 10, and a metal terminal 50 electrically connected to the protruding portions of the coil 60. The core molding 10 has a mounting surface 11 (see FIG. 7, etc.), a top surface 12 facing the opposite side to the mounting surface 11, and side surfaces (e.g., including a front surface 13, a rear surface 14, a left side surface 15, a right side surface 16, a left front surface 21, a left rear surface 22, a right rear surface 23, and a right front surface 24) that intersect with the mounting surface 11 and the top surface 12. The metal terminal 50 has a first planar portion 51 arranged along the side of the core molding 10, a second planar portion 52 connected to the upper end of the first planar portion 51 and arranged along the upper surface 12, and a third planar portion 53 connected to the lower end of the first planar portion 51 and arranged along the mounting surface 11. The tip edge of the second planar portion 52 is a first concave portion 52a (FIG. 8(a) etc.) formed in a planar shape recessed toward the upper end side of the first planar portion 51, which is the base end side of the second planar portion 52, and a recess 30 in which the second planar portion 52 is disposed is formed in the upper surface 12. In the recess 30, a portion corresponding to the first concave portion 52a is a second concave portion 30a (FIG. 8(a) etc.) formed in a planar shape that follows the first concave portion 52a.

[0011] According to this embodiment, the presence of the first concave portion 52a and the second concave portion 30a makes it possible to ensure a sufficient area of ​​the region on the upper surface 12 that can be picked up by a suction nozzle of a mounter (not shown). This makes it possible for the mounter to pick up the coil component 100 more stably.

[0012] The coil device 100 will be described in more detail below. The core molded body 10 is formed by compression molding a powder containing a magnetic material such that the embedded portion 61 of the coil 60 is embedded inside the core molded body 10 . The shape of the core molding 10 is not particularly limited, but for example, it has a mounting surface 11, an upper surface 12, and a plurality of side surfaces perpendicular to the mounting surface 11 and the upper surface 12. The mounting surface 11 is formed flat, for example, except for a pair of second recesses 40 described later. The upper surface 12 is formed flat, for example, except for a pair of recesses 30, and is disposed parallel to the mounting surface 11. The side surfaces of the core molding 10 include, for example, a front surface 13, a rear surface 14 arranged parallel to the front surface 13 and facing the opposite side to the front surface 13, a left side surface 15 perpendicular to the front surface 13 and the rear surface 14, and a right side surface 16 arranged parallel to the left side surface 15 and facing the opposite side to the left side surface 15. The core molding 10 has, as side surfaces, for example, a left front surface 21 arranged between the front surface 13 and the left side surface 15 and connecting the front surface 13 and the left side surface 15, a left rear surface 22 arranged between the left side surface 15 and the rear surface 14 and connecting the left side surface 15 and the rear surface 14, a right rear surface 23 arranged between the rear surface 14 and the right side surface 16 and connecting the rear surface 14 and the right side surface 16, and a right front surface 24 arranged between the right side surface 16 and the front surface 13 and connecting the right side surface 16 and the front surface 13. The left front surface 21 is inclined at an angle of 135 degrees with respect to the front surface 13 and the left side surface 15, for example. The left rear surface 22 is inclined at an angle of 135 degrees with respect to the left side surface 15 and the rear surface 14, for example. The right rear surface 23 is inclined at an angle of 135 degrees with respect to the rear surface 14 and the right side surface 16, for example. The right front surface 24 is inclined at an angle of, for example, 135 degrees with respect to the right side surface 16 and the front surface 13. For example, the left rear surface 22, the right rear surface 23 and the right front surface 24 are of the same shape and dimensions (area) as one another, but the left front surface 21 is smaller in width than the left rear surface 22, the right rear surface 23 and the right front surface 24, and has a smaller area than the left rear surface 22, the right rear surface 23 and the right front surface 24. The front surface 13, the rear surface 14, the left side surface 15, the right side surface 16, the left front surface 21, the left rear surface 22, the right rear surface 23 and the right front surface 24 are each formed flat, for example. In this embodiment, a pair of left and right recesses 30 are formed on the top surface 12, and a pair of left and right second recesses 40 are formed on the mounting surface 11.

[0013] The coil 60 is formed of one round wire, for example. In this case, the coil 60 includes an embedded portion 61 formed by winding the round wire, and a pair of protruding portions (a first protruding portion 62 and a second protruding portion 63) protruding radially outward from the embedded portion 61. The axial direction of the coil 60 is the up-down direction. The first protruding portion 62 is formed of one end of the round wire, and the second protruding portion 63 is formed of the other end of the round wire. The first protruding portion 62 and the second protruding portion 63 protrude horizontally from the embedded portion 61. For example, the first protruding portion 62 and the second protruding portion 63 protrude in opposite directions from the embedded portion 61. The first protruding portion 62 protrudes horizontally, for example, from the lower portion of the left rear surface 22 of the core molded body 10, and the second protruding portion 63 protrudes horizontally, for example, from the lower portion of the right front surface 24 of the core molded body 10. For example, the protruding direction of the first protrusion 62 from the left rear surface 22 is a direction perpendicular to the left rear surface 22, and the protruding direction of the second protrusion 63 from the right front surface 24 is a direction perpendicular to the right front surface 24. It should be noted that the present invention is not limited to this example, and the coil 60 may be an edgewise coil made of a flat wire.

[0014] As shown in FIG. 14, the metal terminal 50 is formed, for example, by bending a single metal plate. The metal terminal 50 has a first planar portion 51, a second planar portion 52, and a third planar portion 53, each of which is formed in a flat plate shape. The second planar portion 52 is connected to an upper end of the first planar portion 51 and is approximately perpendicular to the first planar portion 51. The third planar portion 53 is connected to a lower end of the first planar portion 51 and is approximately perpendicular to the first planar portion 51. The second planar portion 52 and the third planar portion 53 face each other approximately in parallel (see FIG. 9). As shown in Figs. 4 and 5, the first planar portion 51 is formed, for example, in a vertically elongated rectangular shape. 6, the second planar portion 52 is formed, for example, in a rectangular shape that is long in the front-rear direction in plan view. However, the tip edge of the second planar portion 52 is the first concave portion 52a as described above. The left-right width dimension of the second planar portion 52 is, for example, preferably at least twice the plate thickness of the metal terminal 50, and also preferably at least three times. By setting the dimensions of the second planar portion 52 in this manner, the bending process of the second planar portion 52 can be stably performed. As shown in FIG. 7, the third planar portion 53 is formed, for example, in a rectangular shape that is long in the front-rear direction in plan view. The metal terminal 50 further has a fourth planar portion 54 connected to a side edge 51a of the first planar portion 51 and intersecting with the first planar portion 51, and a fifth planar portion 55 connected to a tip edge 54a of the fourth planar portion 54 and intersecting with the fourth planar portion 54. The fourth planar portion 54 and the fifth planar portion 55 are also each formed in a flat plate shape. As shown in Figs. 1 to 5, each of the fourth planar portion 54 and the fifth planar portion 55 is formed in, for example, a rectangular shape that is elongated vertically. In plan view, the angle between the first planar portion 51 and the fourth planar portion 54 is set to, for example, 135 degrees (see FIG. 8(a) and the like). In plan view, the angle between the fourth planar portion 54 and the fifth planar portion 55 is set to, for example, 90 degrees (see FIG. 8(a) and the like). The first planar portion 51, the fourth planar portion 54, and the fifth planar portion 55 are each disposed vertically, while the second planar portion 52 and the third planar portion 53 are each disposed substantially horizontally. A weld piece 56 is formed on the lower end of the fifth planar portion 55. This weld piece 56 is welded to a protruding portion (first protruding portion 62 or second protruding portion 63) of the coil 60 (see FIG. 7, etc.).

[0015] In this embodiment, the coil device 100 includes a pair of left and right metal terminals 50. The pair of metal terminals 50 are formed to have, for example, the same shape and dimensions as each other. The first planar portion 51 of one (left) metal terminal 50 is disposed along the left side surface 15, the second planar portion 52 of the metal terminal 50 is disposed in the left recess 30, and the third planar portion 53 of the metal terminal 50 is disposed in the left second recess 40. The fourth planar portion 54 of the left metal terminal 50 is disposed, for example, along the left rear surface 22, and the fifth planar portion 55 of the metal terminal 50 stands approximately perpendicular to the left rear surface 22. The first planar portion 51 of the other (right) metal terminal 50 is disposed along the right side surface 16, the second planar portion 52 of the metal terminal 50 is disposed in the right recess 30, and the third planar portion 53 of the metal terminal 50 is disposed in the right second recess 40. The fourth planar portion 54 of the right metal terminal 50 is disposed, for example, along the right front surface 24, and the fifth planar portion 55 of the metal terminal 50 stands approximately perpendicular to the right front surface 24. Thus, the mounting surface 11 is formed with the second recess 40 in which the third planar portion 53 is disposed. The fourth planar portion 54 is disposed along the side surface of the core molded body 10, and the fifth planar portion 55 stands upright relative to the side surface of the core molded body 10. In addition, since the fifth surface portion 55 stands up from the side surface of the core molding 10, good heat dissipation can be achieved from the fifth surface portion 55. The vertical dimension of the fifth surface portion 55 is preferably half or more of the vertical dimension of the core molding 10, and more preferably 2 / 3 or more of the vertical dimension of the core molding 10.

[0016] The metal terminal 50 is, for example, adhesively fixed to the core molded body 10. For example, as shown in Fig. 9, the first planar portion 51 is in surface contact with a side surface of the core molded body 10 and is surface-bonded to the core molded body 10 with an adhesive.

[0017] The welding piece 56 of the left metal terminal 50 is welded to one protrusion (first protrusion 62) of the coil 60, and the welding piece 56 of the right metal terminal 50 is welded to the other protrusion (second protrusion 63) of the coil 60. For example, the welding piece 56 and the first protrusion 62 of the left metal terminal 50 are welded to each other at a spherical first welding portion 71, and similarly, the welding piece 56 and the second protrusion 63 of the right metal terminal 50 are welded to each other at a spherical second welding portion 72.

[0018] As shown in Figures 11 and 12, of the pair of left and right recesses 30, the left recess 30 is located at the left end of the upper surface 12, and the right recess 30 is located at the right end of the upper surface 12. Each recess 30 is configured to include, for example, a first step 31 (bottom surface), a first inclined surface 32 (upper inclined surface) arranged on the peripheral portion of the recess 30, a second step 35 arranged at a lower level than the first step 31, a second inclined surface 36 arranged between the first step 31 and the second step 35 and sloping downward from the first step 31 side toward the second step 35 side, and a pair of vertical surfaces 37. The first step 31 occupies most of the planar area of ​​the recess 30, and the bottom surface of the first step 31 is disposed substantially horizontally. However, in this embodiment, the first step 31 becomes deeper as it goes away from the side surface. The left edge of the first step 31 of the left recess 30 extends linearly in the front-to-rear direction. The front and rear edges of the first step 31 of the left recess 30 each extend linearly in the left-to-right direction. The second step 35 of the left recess 30 extends linearly in the front-to-rear direction along the left edge of the first step 31 of the left recess 30, and is disposed substantially horizontally. The left edge of the second step 35 of the left recess 30 also serves as the upper edge of the left side surface 15 at the location where the left recess 30 is formed. Similarly, the right edge of the first step 31 of the right recess 30 extends linearly in the front-to-rear direction. The front and rear edges of the first step 31 of the right recess 30 each extend linearly in the left-to-right direction. The second step 35 of the right recess 30 extends linearly in the front-to-rear direction along the right edge of the first step 31 of the right recess 30 and is disposed substantially horizontally. The right edge of the second step 35 of the right recess 30 also serves as the upper edge of the right side surface 16 at the location where the right recess 30 is formed. In plan view, a second inclined surface 36 is disposed between the first step portion 31 and the second step portion 35. The second inclined surface 36 of the left recess 30 extends front-to-rear along the left edge of the first step 31 of the left recess 30, and is inclined downward toward the left side. The first inclined surface 32 of the left recess 30 is disposed continuously over the right edge, the front edge, and the rear edge of the recess 30 . Similarly, the second inclined surface 36 of the right recess 30 extends front-to-rear along the right edge of the first step portion 31 of the right recess 30, and is inclined downward toward the right. The first inclined surface 32 of the right recess 30 is disposed continuously over the left edge, the front edge, and the rear edge of the recess 30 . Each of the first inclined surfaces 32 is inclined in a direction in which the recess 30 narrows toward the depth direction (downward) of each of the recesses 30. The first inclined surfaces 32 function as a removal taper when the core molding body 10 is removed from the mold after molding. In each recess 30, the height position of the lower end of the first inclined surface 32 is the same height position as the bottom surface of the first step 31. Vertical surfaces 37 are disposed vertically between both ends in the longitudinal direction of the second step 35 and the second inclined surface 36 and the lower end of the first inclined surface 32.

[0019] The planar shape of the recesses 30 corresponds to the planar shape of the second planar portions 52 , and the second planar portions 52 fit into each recess 30 . As described above, the tip edge of the second planar portion 52 of the metal terminal 50 is the first concave portion 52a which is formed in a flat shape recessed toward the upper end side of the first planar portion 51. That is, in a plan view, the right edge (leading edge) of the second planar portion 52 of the left metal terminal 50 is recessed toward the left side, and the left edge (leading edge) of the second planar portion 52 of the right metal terminal 50 is recessed toward the right side. More specifically, the right edge of the second planar portion 52 of the left metal terminal 50 is recessed in an arc shape toward the left side, and the left edge of the second planar portion 52 of the right metal terminal 50 is recessed in an arc shape toward the right side.

[0020] In addition, both ends at the tip edge of the second planar portion 52 (in this embodiment, the front end and rear end at the right edge of the second planar portion 52 on the left side, and the front end and rear end at the left edge of the second planar portion 52 on the right side) are each formed in a convex arc shape facing outward from the second planar portion 52. In the recess 30, the portions corresponding to both ends at the tip edge of the second planar portion 52 are formed in an arc shape along both ends at the tip edge of the second planar portion 52. For this reason, in a structure in which the second concave portion 30a is formed in the recess 30 as in this embodiment, chipping of the core molded body 10 can be suppressed, and interference of the second planar portion 52 with the core molded body 10 can also be suppressed.

[0021] As described above, in each recess 30, a portion corresponding to the first recess 52a is the second recess 30a that is formed in a planar shape that fits the first recess 52a. That is, the planar shape of the right edge of the first step 31 of the left recess 30 and the planar shape of the portion of the first inclined surface 32 of the left recess 30 that is arranged along the right edge of the first step 31 are concave in an arc shape recessed toward the left side. Similarly, the planar shape of the left edge of the first step 31 of the right-side recess 30 and the planar shape of the portion of the first inclined surface 32 of the right-side recess 30 that is arranged along the left edge of the first step 31 are concave in an arc shape recessed toward the right.

[0022] Here, the second recessed portion 30a of the left recessed portion 30 and the second recessed portion 30a of the right recessed portion 30 are disposed on the same circumference in a plan view. In this way, a pair of recesses 30 are formed on the upper surface 12, the coil 60 has a pair of protrusions (a first protrusion 62 and a second protrusion 63), the coil component 100 has a pair of metal terminals 50, one of the pair of metal terminals 50 is electrically connected to one of the pair of protrusions, and the other of the pair of metal terminals 50 is electrically connected to the other of the pair of protrusions, the second surface portion 52 of one of the pair of metal terminals 50 is arranged in one of the pair of recesses 30, the second surface portion 52 of the other of the pair of metal terminals 50 is arranged in the other of the pair of recesses 30, and the second recessed portion 30a of one of the pair of recesses 30 and the second recessed portion 30a of the other of the pair of recesses 30 are arranged on the same circumference as each other in a planar view. This allows the circular area on the upper surface 12, which is sandwiched between the second concave portions 30a of the pair of concave portions 30, to be satisfactorily sucked by the suction nozzle of the mounter.

[0023] As shown in Figure 13, of the pair of left and right second recesses 40, the left second recess 40 is located at the left end of the mounting surface 11, and the right second recess 40 is located at the right end of the mounting surface 11. Each second recess 40 is configured, for example, to include a first step 41 (bottom surface), a first inclined surface 42 (lower inclined surface) arranged on the peripheral portion of the second recess 40 and a pair of front and rear second inclined surfaces 43 (lower inclined surfaces), a second step 45 arranged above the first step 41 (towards the upper surface 12), a third inclined surface 46 arranged between the first step 41 and the second step 45 and inclined (upwardly inclined) from the first step 41 side toward the second step 45 side, and a pair of vertical surfaces 47. The first step 41 occupies most of the planar area of ​​the second recess 40, and the bottom surface of the first step 41 is disposed substantially horizontally. In the case of this embodiment, the first step 41 becomes deeper as it goes away from the side surface. However, the present invention is not limited to this example, and the bottom surface of the first step 41 may be disposed horizontally (parallel to the mounting surface 11). The left and right edges of the first step 41 of the left second recess 40 extend linearly in the front-to-rear direction. The front and rear edges of the first step 41 of the left second recess 40 extend linearly in the left-to-right direction. The second step 45 of the left second recess 40 extends linearly in the front-to-rear direction along the left edge of the first step 41 of the left second recess 40 and is disposed substantially horizontally. The left edge of the second step 45 of the left second recess 40 also serves as the lower edge of the left side surface 15 at the location where the left second recess 40 is formed. Similarly, the left and right edges of the first step 41 of the right second recess 40 extend linearly in the front-to-rear direction. The front and rear edges of the first step 41 of the right second recess 40 extend linearly in the left-to-right direction. The second step 45 of the right second recess 40 extends linearly in the front-to-rear direction along the right edge of the first step 41 of the right second recess 40 and is disposed substantially horizontally. The right edge of the second step 45 of the right second recess 40 also serves as the lower edge of the right side surface 16 at the location where the right second recess 40 is formed. In plan view, a third inclined surface 46 is disposed between the first step portion 41 and the second step portion 45. The third inclined surface 46 of the left second recess 40 extends front-rear along the left edge of the first step 41 of the left second recess 40, and is inclined upward toward the left side. The first inclined surface 42 of the left second recess 40 extends front-rear along the right edge of the second recess 40. The front second inclined surface 43 of the left second recess 40 extends left-right along the front edge of the left second recess 40. The rear second inclined surface 43 of the left second recess 40 extends left-right along the rear edge of the left second recess 40. Similarly, the third inclined surface 46 of the right second recess 40 extends front-rear along the right edge of the first step 41 of the right second recess 40, and is inclined upward toward the right side. The first inclined surface 42 of the right second recess 40 extends front-rear along the left edge of the second recess 40. The front second inclined surface 43 of the right second recess 40 extends left-right along the front edge of the right second recess 40. The rear second inclined surface 43 of the right second recess 40 extends left-right along the rear edge of the right second recess 40. In each second recess 40, the first inclined surface 42 and the pair of second inclined surfaces 43 are inclined in a direction in which the second recess 40 narrows toward the depth direction (upward) of each second recess 40. The first inclined surface 42 and the pair of second inclined surfaces 43 function as a removal taper when the core molding 10 is removed from the mold after molding. In each second recess 40, the height position of the upper end of each second inclined surface 43 is the same height position as the bottom surface of the first step 41. Between both ends in the longitudinal direction of the second step 45 and the third inclined surface 46 and the upper end of each second inclined surface 43, vertical surfaces 47 are disposed vertically.

[0024] The planar shape of the second recesses 40 corresponds to the planar shape of the third planar portions 53 , and the third planar portions 53 fit into each of the second recesses 40 .

[0025] 9, the second planar portion 52 is, for example, spaced apart from the bottom surface of the recess 30. On the other hand, the third planar portion 53 is in contact with the bottom surface of the second recess 40, or the distance between the third planar portion 53 and the bottom surface of the second recess 40 is smaller than the distance between the second planar portion 52 and the bottom surface of the recess 30. This makes it possible to improve the positional accuracy of the third planar portion 53 functioning as a mounting terminal, while suppressing interference between the second planar portion 52 and the recess 30 (core molded body 10).

[0026] When the metal terminal 50 is assembled to the core molded body 10, for example, the second planar portion 52 is pressed downward to be crimped. Since the second step portion 35 and the second inclined surface 36 are arranged at the boundary between the upper surface 12 and the left side surface 15 and the boundary between the upper surface 12 and the right side surface 16, interference between the second planar portion 52 and the core molded body 10 can be suppressed when the metal terminal 50 is assembled to the core molded body 10 or when the second planar portion 52 is crimped. In addition, since the first step portion 31 becomes deeper as it moves away from the side surface as described above, it is also possible to suppress the second planar portion 52 from falling off to the side from the recess 30 after the second planar portion 52 is crimped. In other words, it is also possible to suppress the second planar portion 52 on the left side from falling off to the left from the recess 30 on the left side, and the second planar portion 52 on the right side from falling off to the right from the recess 30 on the right side. In addition, a second step portion 45 and a third inclined surface 46 are arranged at the boundary between the mounting surface 11 and the left side surface 15, and at the boundary between the mounting surface 11 and the right side surface 16, so that interference between the third surface portion 53 and the core molding 10 can be suppressed when the metal terminal 50 is assembled to the core molding 10.

[0027] As described above, the first inclined surface 32 of the recess 30 is inclined in a direction in which the recess 30 narrows toward the depth direction of the recess 30. Similarly, the first inclined surface 42 and the pair of second inclined surfaces 43 of the second recess 40 are inclined in a direction in which the second recess 40 narrows toward the depth direction of the second recess 40. However, in this embodiment, the inclination angle of the first inclined surface 32 is steeper (closer to the vertical) than the inclination angles of the first inclined surface 42 and the second inclined surface 43. In this way, an upper inclined surface (first inclined surface 32) is formed on the peripheral portion of the recess 30, which is inclined in the direction in which the recess 30 narrows toward the depth direction of the recess 30, and a lower inclined surface (first inclined surface 42, second inclined surface 43) is formed on the peripheral portion of the second recess 40, which is inclined in the direction in which the second recess 40 narrows toward the depth direction of the second recess 40, and the inclination angle of the upper inclined surface is steeper than the inclination angle of the lower inclined surface. This makes it possible to more sufficiently secure an area on the upper surface 12 that can be attached by the suction nozzle of the mounter.

[0028] 4, a width dimension W1 (e.g., front-to-rear width dimension) of an upper end portion of the first planar portion 51 is smaller than a width dimension W2 (e.g., front-to-rear width dimension) of a lower end portion of the first planar portion 51. This makes it easier to perform the crimping process on the second planar portion 52. Furthermore, in the radial direction of the coil device 100, the dimension of the third planar portion 53 is smaller than the dimension of the second planar portion 52. This also makes it possible to more sufficiently ensure an area on the upper surface 12 that can be mounted by the suction nozzle of the mounter.

[0029] Furthermore, the first protruding portion 62 and the second protruding portion 63 of the coil 60 protrude from the lower portion of the core molded body 10, and the first protruding portion 62 and the second protruding portion 63 are electrically connected to the metal terminals 50 at the lower portion of the coil component 100. This makes it possible to shorten the distance from the first protruding portion 62 and the second protruding portion 63 to the third planar portion 53, which is the mounting terminal, and this also reduces the DCR (direct current resistance) of the coil component 100. Furthermore, since the first protrusion 62, the second protrusion 63, the first welded portion 71 and the second welded portion 72 are arranged at the lower part of the coil part 100, the center of gravity of the coil part 100 can be made lower, thereby improving the vibration resistance of the coil part 100.

[0030] The use of the coil device 100 is not particularly limited, but the coil device 100 can be used, for example, as an inductor for use in a vehicle.

[0031] Although the embodiments have been described above with reference to the drawings, these are merely examples of the present invention, and various configurations other than those described above can also be adopted.

[0032] The present embodiment encompasses the following technical ideas. (1) A core molded body formed of a magnetic material, the core molded body having a mounting surface, a top surface facing the opposite side to the mounting surface, and a side surface intersecting the mounting surface and the top surface; A coil having an embedded portion embedded in the core molded body and a protruding portion protruding from the core molded body; a metal terminal having a first planar portion disposed along the side surface, a second planar portion connected to an upper end of the first planar portion and disposed along the upper surface, and a third planar portion connected to a lower end of the first planar portion and disposed along the mounting surface, the metal terminal being electrically connected to the protrusion; Equipped with a tip edge of the second planar portion is a first concave portion formed in a planar shape recessed toward an upper end side of the first planar portion, which is a base end side of the second planar portion; a recess in which the second planar portion is disposed is formed on the upper surface, In the coil component, a portion of the recess corresponding to the first recess is a second recess formed in a planar shape that fits the first recess. (2) a pair of the recesses is formed on the upper surface, The coil has a pair of the protrusions, The coil component includes a pair of the metal terminals, one of the pair of metal terminals is electrically connected to one of the pair of protrusions, the other of the pair of metal terminals is electrically connected to the other of the pair of protrusions, the second surface portion of one of the pair of metal terminals is disposed in one of the pair of recesses, the second surface portion of the other of the pair of metal terminals is disposed in the other of the pair of recesses, The coil component according to (1), wherein the second concave-shaped portion of one of the pair of recesses and the second concave-shaped portion of the other of the pair of recesses are arranged on the same circumference as each other in a planar view. (3) The coil component according to (1) or (2), wherein the mounting surface has a second recess in which the third planar portion is disposed. (4) the second planar portion is spaced from a bottom surface of the recess, The coil component according to (3), wherein the third surface portion is in contact with a bottom surface of the second recess, or the distance between the third surface portion and the bottom surface of the second recess is smaller than the distance between the second surface portion and the bottom surface of the recess. (5) An upper inclined surface is formed on the periphery of the recess, the upper inclined surface being inclined in a direction in which the recess narrows toward the depth direction of the recess, a lower inclined surface is formed on a periphery of the second recess, the lower inclined surface being inclined in a direction in which the second recess narrows toward a depth direction of the second recess, The coil component according to (3) or (4), wherein the inclination angle of the upper inclined surface is steeper than the inclination angle of the lower inclined surface. (6) The metal terminal is a fourth planar portion connected to a side edge of the first planar portion and intersecting the first planar portion; a fifth planar portion connected to a tip edge of the fourth planar portion and intersecting the fourth planar portion; The fourth planar portion is disposed along a side surface of the core molding, The coil component according to any one of (1) to (5), wherein the fifth planar portion stands upright relative to a side surface of the core molded body. (7) The coil component according to (6), wherein a welded piece formed on a lower end of the fifth planar portion is welded to the protruding portion of the coil. [Explanation of symbols]

[0033] 10 Core molding 11 Mounting surface 12 Top side 13 Front (side) 14 Rear (side) 15 Left side (side) 16 Right side (side) 21 Left front (side) 22 Left rear (side) 23 Right rear (side) 24 Right front (side) 30 Recess 30a 2nd concave part 31 1st stage section (bottom) 32 1st slope (upper slope) 35 Second Stage 36 Second slope 37 Vertical Plane 40 Second recess 41 1st stage section (bottom) 42 1st slope (lower slope) 43 Second slope (lower slope) 45 Second Stage 46 Third slope 47 Vertical Plane 50 metal terminal 51 First surface part 51a Side edge 52 Second surface part 52a 1st concave part 53 Third surface part 54 Fourth plane part 54a Tip edge 55 Fifth planar part 56 Welding Piece 60 Coil 61 Buried section 62 1st protrusion (protrusion) 63 Second protrusion (protrusion) 71 First Welding Section 72 Second Welding Section 100 Coil parts

Claims

1. A core molded body formed of a magnetic material and having a mounting surface, a top surface facing the opposite side to the mounting surface, and a side surface intersecting the mounting surface and the top surface; A coil having an embedded portion embedded in the core molded body and a protruding portion protruding from the core molded body; a metal terminal having a first planar portion disposed along the side surface, a second planar portion connected to an upper end of the first planar portion and disposed along the upper surface, and a third planar portion connected to a lower end of the first planar portion and disposed along the mounting surface, the metal terminal being electrically connected to the protrusion; Equipped with the core molded body is integrally molded as a whole by compression molding a powder containing the magnetic material such that the embedded portion is embedded inside the core molded body, a tip edge of the second planar portion is a first concave portion formed in a planar shape recessed toward an upper end side of the first planar portion, which is a base end side of the second planar portion; a recess in which the second planar portion is disposed is formed on the upper surface, A coil component in which a portion of the recess corresponding to the first concave portion is a second concave portion formed in a planar shape that fits the first concave portion.

2. A pair of the recesses is formed on the upper surface, The coil has a pair of the protrusions, The coil component includes a pair of the metal terminals, one of the pair of metal terminals is electrically connected to one of the pair of protrusions, the other of the pair of metal terminals is electrically connected to the other of the pair of protrusions, the second surface portion of one of the pair of metal terminals is disposed in one of the pair of recesses, the second surface portion of the other of the pair of metal terminals is disposed in the other of the pair of recesses, 2. The coil component according to claim 1, wherein the second concave portion of one of the pair of concave portions and the second concave portion of the other of the pair of concave portions are arranged on the same circumference as each other in a planar view.

3. The coil component according to claim 1 , wherein the mounting surface is formed with a second recess in which the third planar portion is disposed.

4. A core molding formed of a magnetic material, the core molding having a mounting surface, a top surface facing the opposite side to the mounting surface, and a side surface intersecting the mounting surface and the top surface; A coil having an embedded portion embedded in the core molded body and a protruding portion protruding from the core molded body; a metal terminal having a first planar portion disposed along the side surface, a second planar portion connected to an upper end of the first planar portion and disposed along the upper surface, and a third planar portion connected to a lower end of the first planar portion and disposed along the mounting surface, the metal terminal being electrically connected to the protrusion; Equipped with a tip edge of the second planar portion is a first concave portion formed in a planar shape recessed toward an upper end side of the first planar portion, which is a base end side of the second planar portion; a recess in which the second planar portion is disposed is formed on the upper surface, In the recess, a portion corresponding to the first recess is a second recess formed in a planar shape along the first recess, a second recess in which the third planar portion is disposed is formed in the mounting surface, the entire second planar portion is spaced from a bottom surface of the recess, and the entire second planar portion is not in contact with the bottom surface of the recess, A coil component in which the third surface portion is in contact with the bottom surface of the second recess, or the distance between the third surface portion and the bottom surface of the second recess is smaller than the distance between the second surface portion and the bottom surface of the recess.

5. An upper inclined surface is formed on the periphery of the recess, the upper inclined surface being inclined in a direction in which the recess narrows toward the depth direction of the recess, a lower inclined surface is formed on a periphery of the second recess, the lower inclined surface being inclined in a direction in which the second recess narrows toward a depth direction of the second recess, The depth dimension of the recess is greater than the depth dimension of the second recess, The coil component according to claim 3 , wherein an inclination angle of the upper inclined surface is steeper than an inclination angle of the lower inclined surface.

6. The metal terminal is a fourth planar portion connected to a side edge of the first planar portion and intersecting the first planar portion; a fifth planar portion connected to a tip edge of the fourth planar portion and intersecting the fourth planar portion; The fourth planar portion is disposed along a side surface of the core molding, The coil component according to claim 1 , wherein the fifth planar portion stands upright relative to a side surface of the core molded body.

7. The coil component according to claim 6 , wherein a weld piece formed on a lower end of the fifth planar portion is welded to the protruding portion of the coil.

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