JP6019826B2 - Wound-type electronic component core, wound-type electronic component, and method for manufacturing wound-type electronic component core - Google Patents

Description

  The present invention relates to a core of a wound electronic component, a wound electronic component, and a method of manufacturing a wound electronic component core.

  As a core of a conventional wound electronic component, for example, a core in a wound coil component described in Patent Document 1 is known. The wound coil component 500 described in Patent Document 1 will be described below. FIG. 22 is a cross-sectional view of a wound coil component 500 described in Patent Document 1. FIG. 23 is a cross-sectional view of the winding coil component 500 described in Patent Document 1 in the middle of manufacturing. FIG. 24 is a cross-sectional view of a wound coil component 500 ′ in consideration of the manufacturing process of the wound coil component 500 described in Patent Document 1. FIG. 25 is a cross-sectional view of the winding coil component 500 ′ during its manufacture. 22 and 23, the direction in which the central axis of the winding core part 501a of the wound coil component 500 extends is defined as the x-axis. Similarly, in FIGS. 24 and 25, the direction in which the central axis of the winding core part 501a of the wound coil component 500 'extends is defined as the x-axis. Further, in FIGS. 23 and 25, the die cutting direction in the pressing process of the magnetic core 501 and the magnetic core 501 ′ is defined as the y axis.

  As shown in FIG. 22, the wound coil component 500 includes a magnetic core 501, external electrodes 512 a and 512 b, and a winding 513. The magnetic core 501 is made of an insulating material and includes a winding core portion 501a and flange portions 501b and 501c. The winding core part 501a extends in the x-axis direction. The flange portions 501b and 501c are provided at both ends of the core portion 501a.

  The external electrodes 512a and 512b are provided on the flange portions 501b and 501c, respectively. Winding 513 is wound around winding core 501a, and both ends of winding 513 are connected to external electrodes 512a and 512b, respectively.

  As shown in FIG. 22, the magnetic core 501 of the wound coil component 500 configured as described above has a shape in which the flange portions 501b and 501c protrude from the core portion in a direction perpendicular to the x-axis direction. doing. Thereby, when the external electrode 512 and the coil | winding 513 are joined by thermocompression bonding, the collar part 501b, 501c is the part of the coil | winding 513 wound around the core part 501a. Protect from.

  By the way, the presence of the flange portions 501b and 501c becomes a factor that the magnetic core 501 is chipped and cracked in the manufacturing process of the magnetic core 501. The flange portions 501b and 501c are molded by filling a female mold with powder as a core material and pressing the filled powder using male molds 550 and 560 as shown in FIG. However, when the side surfaces S501 to S504 of the flange portions 501b and 501c are parallel to the die-cutting direction, between the side surfaces S501 to S504 and the side surfaces S509 to S512 of the male dies 550 and 560 when the die is pressed after pressing. Friction occurs. As a result, the magnetic core 501 may be chipped and cracked due to the friction.

  For the reasons as described above, the winding core part 501a of the magnetic core 501 of the winding coil component 500 shown in FIG. 22 is actually provided at the end in the x-axis direction as shown in FIG. Tapered surfaces S501 ′ to S504 ′ that are inclined from 501a toward the end surfaces S505 to S508 of the flange portion are provided. As a result, as shown in FIG. 25, the male side surfaces S509 ′ to S512 ′ and the taper surfaces S501 ′ to S504 ′ of the core portion are separated from the start of the die cutting. As a result, friction between the taper surfaces S501 'to S504' of the winding core and the male side surfaces S509 'to S512' is suppressed, and chipping and cracking of the magnetic core 501 'are suppressed.

  However, in the magnetic core 501 ′ of FIG. 24, since the taper surface is provided at the end portion in the axial direction of the winding core portion 501 a, the region around which the winding of the magnetic core 501 ′ is wound becomes narrow. As a result, the number of turns and the wire diameter of the winding 513 are limited, which hinders improvement of inductance.

JP 2011-171544 A

  Accordingly, an object of the present invention is to provide an area in which the winding is wound around the core of the core of the wound electronic component while preventing chipping and cracking during the molding of the core of the wound electronic component. It is to provide a core of a wound electronic component, a wound electronic component, and a method of manufacturing the core of a wound electronic component that can be extended to the end of the part.

The core of the wire-wound electronic component according to the first aspect of the present invention includes a core part around which the winding is wound, and flanges provided at both ends of the core part, the core part A flange portion projecting around the core portion in a direction perpendicular to the axial direction of the core portion, an adjacent surface of the flange portion adjacent to the core portion, and one of the projection directions of the collar portion A recess formed at a corner formed by an end face positioned in the first orthogonal direction, and a connecting surface connecting the end face and the joint portion where the flange portion is in contact with the core portion is an inner peripheral surface of the recess. And the second orthogonal direction is orthogonal to the first orthogonal direction and the axial direction, and an electrode is provided on an end surface of the flange portion located in the second orthogonal direction. In addition, all the normal vectors of the connection surfaces have a component in the first orthogonal direction.
The core of the wire-wound electronic component according to the second aspect of the present invention includes a core portion around which the winding is wound, and flanges provided at both ends of the core portion, the core portion And an end surface positioned in the extending direction of the flange portion, the adjacent surface of the flange portion adjacent to the core portion, and a flange portion protruding around the core portion in a direction orthogonal to the axial direction And a connecting surface that connects the joint portion where the flange portion is in contact with the core portion and the end surface is an inner peripheral surface of the recess, and a predetermined direction perpendicular to the axial direction. The second orthogonal direction is orthogonal to the predetermined direction and the axial direction when viewed from the predetermined direction, and the second orthogonal direction of the flange portion The electrode is provided in the end surface located in a direction, It is characterized by the above-mentioned.

  The wire wound electronic component according to the present invention includes a core of the wire wound electronic component and a winding wound around the core portion of the core.

A method of manufacturing a wound electronic component according to a first aspect of the present invention includes a winding core portion around which a winding is wound, and flanges provided at both ends of the winding core portion. A core manufacturing method for a wound-type electronic component comprising: a flange projecting around the core portion in a direction orthogonal to the axial direction of the portion, wherein the core material is filled in the female die. A second step of pressing the core material filled in the female die with a male die, and a third step of forming an electrode on the flange , wherein the second step includes: A connecting surface that connects a joint portion where the flange portion is in contact with the core portion and an end face located in the protruding direction of the flange portion is provided at a corner formed by the flange portion and the end surface adjacent to the core portion. and at least a portion of the inner peripheral surface of the recess, the second orthogonal direction is perpendicular to the demolding direction and the axial direction, before Electrode is formed on an end surface located in said second orthogonal direction of the flange portion, opposite with respect to the normal vector all, the stamping direction of the first pressing surface of the male pressurizing the connection surface It has a directional component.
A method of manufacturing a wound electronic component according to a second aspect of the present invention includes a winding core portion around which a winding is wound, and a flange portion provided at one end of the winding core portion. A core manufacturing method for a wound-type electronic component comprising: a flange projecting around the core portion in a direction orthogonal to the axial direction of the portion, wherein the core material is filled in the female die. A second step of pressing the core material filled in the female die with a male die, and a third step of forming an electrode on the flange, wherein the second step includes: The connecting surface that connects the joint portion where the flange portion is in contact with the core portion and the end face located in the overhanging direction of the flange portion is a corner formed by the adjacent surface of the flange portion adjacent to the core portion and the end surface. The second orthogonal direction is orthogonal to the die cutting direction and the axial direction, and the electrode is The first pressure surface of the male mold that is formed on the end surface of the collar portion that is positioned in the second orthogonal direction and pressurizes the connection surface is configured by a surface that is visible when viewed from the mold release direction. It is characterized by that.

  According to the present invention, while preventing chipping and cracking during the molding of the core of the wound electronic component, the region in which the winding is wound in the core portion of the core of the wound electronic component is Can be extended to the end.

1 is an external perspective view of a wound electronic component according to an embodiment of the present invention. It is the figure which planarly viewed the core of the winding type electronic component which concerns on one Embodiment of this invention from the positive direction side of the y-axis direction. It is sectional drawing in AA of the core of the winding type | mold electronic component of FIG. It is the figure which planarly viewed the core of the winding type electronic component of FIG. 2 from the negative direction side in the y-axis direction. It is sectional drawing in AA of the core of the winding type | mold electronic component of FIG. It is sectional drawing of the core of the coil | winding type electronic component which does not satisfy | fill the structural requirements of this invention. It is an external appearance perspective view of the female type | mold of the core of the coil | winding type electronic component which concerns on one Embodiment of this invention. It is sectional drawing in the middle of manufacture of the core of the winding type | mold electronic component which concerns on one Embodiment of this invention. It is sectional drawing of the male type | mold of the core of the winding type | mold electronic component which concerns on one Embodiment of this invention. It is sectional drawing of the male type | mold of the core of the winding type | mold electronic component which concerns on one Embodiment of this invention. It is the figure which planarly viewed the core of the coil | winding type electronic component which concerns on a 1st modification from the positive direction side of the y-axis direction. It is sectional drawing in BB of the core of the winding type electronic component which concerns on the 1st modification of FIG. It is the figure which planarly viewed the core of the winding type electronic component which concerns on the 1st modification of FIG. 11 from the negative direction side of the y-axis direction. It is the figure which planarly viewed the core of the winding type electronic component which concerns on a 2nd modification from the positive direction side of a y-axis direction. It is sectional drawing in CC of the core of the coil | winding type electronic component which concerns on the 2nd modification of FIG. It is the figure which planarly viewed the core of the winding type electronic component which concerns on the 2nd modification of FIG. 14 from the negative direction side of the y-axis direction. It is sectional drawing in EE of the core of the coil | winding type electronic component which concerns on the 2nd modification of FIG. It is sectional drawing in FF of the core of the coil | winding type electronic component which concerns on the 2nd modification of FIG. It is the figure which planarly viewed the core of the winding type electronic component which concerns on a 3rd modification from the positive direction side of the y-axis direction. It is sectional drawing in GG of the core of the coil | winding type electronic component which concerns on the 3rd modification of FIG. It is the figure which planarly viewed from the negative direction side of the y-axis direction the core of the winding type electronic component which concerns on the 3rd modification of FIG. 2 is a cross-sectional view of a wound coil component described in Patent Document 1. FIG. It is sectional drawing in the middle of manufacture of the coil part described in patent document 1. 6 is a cross-sectional view of a wound coil component in consideration of the manufacturing process of the wound coil component described in Patent Document 1. FIG. It is sectional drawing in the middle of manufacture of the coiled coil components which considered the manufacturing process of the coiled coil components of patent document 1.

  Hereinafter, a wound-type electronic component, a core of the wound-type electronic component, and a manufacturing method of the core of the wound-type electronic component according to an embodiment of the present invention will be described.

(Configuration of wire wound electronic components)
A configuration of the wound electronic component 10 according to an embodiment of the present invention will be described. FIG. 1 is an external perspective view of a wound electronic component 10 according to an embodiment of the present invention. FIG. 2 is a plan view of the core 11 of the wound electronic component 10 according to the embodiment of the present invention from the positive side in the y-axis direction. 3 and 5 are cross-sectional views taken along line AA of the core 11 of the wound electronic component 10 of FIG. FIG. 4 is a plan view of the core 11 of the wound electronic component 10 according to the embodiment of the present invention from the negative direction side in the y-axis direction. 1 to 5, the direction in which the central axis of the winding core portion extends is defined as the x-axis. Further, the directions along the two sides of the end face located in the x-axis direction of the core 11 are defined as the y-axis and the z-axis. The x axis, the y axis, and the z axis are orthogonal to each other.

  As shown in FIG. 1, the wound electronic component 10 includes a core 11, electrodes 12 a and 12 b, a winding 13, and a protective material 14. The core 11 is made of an insulating material such as ferrite or alumina, and includes a core portion 11a (hidden by the winding 13 in FIG. 1) and flange portions 11b and 11c.

The core part 11a is a quadrangular prism-shaped member extending in the x-axis direction, as shown in FIGS. However, the core part 11a is not limited to a prismatic shape, and may be a cylindrical shape or a polygonal shape. Moreover, as shown in FIG. 3, the surface located in the positive direction side of the y-axis direction of the core part 11a is called end surface S1. Furthermore, the surface located on the negative direction side in the y-axis direction of the core portion 11a is referred to as an end surface S2.
In addition, the edge part located in the x-axis direction of the core part 11a is equivalent to the "both ends of a core part" of this invention.

  The collar part 11b is provided in the edge part of the negative direction side of the x-axis direction of the core part 11a, as shown in FIGS. The flange portion 11c is provided at the end portion on the positive direction side in the x-axis direction of the core portion 11a. Both of the flange portions 11b and 11c are substantially rectangular parallelepiped members projecting from the core portion in the y-axis direction and the z-axis direction. Note that the flange portion 11b is symmetrical to the flange portion 11c with respect to a plane that passes through the center point in the x-axis direction of the core portion 11a and is parallel to the y-axis and the z-axis.

  As shown in FIG. 3, the surface on the positive direction side in the y-axis direction of the flange portion 11b (the end surface positioned in the first orthogonal direction that is one of the protruding directions of the flange portion) is referred to as an end surface S3. Further, the surface on the negative direction side in the y-axis direction of the flange portion 11b (the end surface positioned in the first orthogonal direction which is one of the protruding directions of the flange portion) is referred to as an end surface S4. The end surface S4 is symmetrical to the end surface S3 with respect to a plane that passes through the center point in the y-axis direction of the core portion 11a and is parallel to the x-axis and the z-axis. Further, as shown in FIGS. 2 and 3, the surface on the positive side in the x-axis direction of the flange portion 11b and adjacent to the core portion 11a is referred to as an adjacent surface S100.

  As shown in FIG. 3, the surface on the positive direction side in the y-axis direction of the flange portion 11c (the end surface positioned in the first orthogonal direction which is one of the protruding directions of the flange portion) is referred to as an end surface S5. A surface on the negative direction side in the y-axis direction of the flange portion 11c (an end surface positioned in a first orthogonal direction that is one of the protruding directions of the flange portion) is referred to as an end surface S6. The end surface S6 is symmetrical to the end surface S5 with respect to a plane that passes through the center point in the y-axis direction of the core portion 11a and is parallel to the x-axis and the z-axis. Further, as shown in FIGS. 2 and 3, a surface on the negative side in the x-axis direction of the flange portion 11c and adjacent to the core portion 11a is referred to as an adjacent surface S101.

  An angle located on the positive direction side in the x-axis direction of the flange portion 11b and on the positive direction side in the y-axis direction, that is, the center in the z-axis direction of the corner formed by the adjacent surface S100 and the end surface S3 is shown in FIG. And as shown in FIG. 3, the recessed part D1 is provided. On the inner peripheral surface of the recess D1, a surface connecting the joining surface L1 where the flange portion 11b contacts the end surface S1 of the core portion 11a and the end surface S3 is referred to as a connection surface S7.

  Here, as shown in FIG. 5, the component v7y in the y-axis direction of the normal vector v7, which is one of the normal vectors of the connection surface S7, is positive. In addition, components in the y-axis direction of other normal vectors on the connection surface S7 are also positive. Furthermore, the positive direction side in the y-axis direction is one of the projecting directions of the flange portion 11b (first orthogonal direction). That is, all the normal vectors of the connection surface S7 have a component in the direction in which the flange portion 11b protrudes (first orthogonal direction). In addition, the positive direction side in the y-axis direction is a die-cutting direction of the male die 50 described later.

  Further, all the normal vectors of the connection surface S7 have a component in the direction (first orthogonal direction) in which the flange portion 11b protrudes from the core portion 11a. Thereby, as shown in FIG. 5, when the line of sight 201 is directed to the connection surface S7 from the eye 200 located on the positive direction side in the y-axis direction, that is, a direction (predetermined direction) orthogonal to the axis of the core portion 11a. When the connection surface S7 is viewed from above, the entire surface of the connection surface S7 is visible. That is, the connection surface S7 is configured by a visually recognizable surface.

  In addition, as an example in which the connection surface is an invisible surface, there is a case as shown in FIG. The normal vector v20 of the connection surface S20 shown in FIG. 6 does not have a component in the direction in which the flange portion 11b protrudes from the core portion 11a, that is, the direction orthogonal to the axis of the core portion 11a (predetermined direction). Therefore, the connection surface S20 is configured by a surface that cannot be visually recognized.

  An angle located on the positive side in the x-axis direction of the flange portion 11b and on the negative side in the y-axis direction, that is, the center in the z-axis direction of the corner formed by the adjacent surface S100 and the end surface S4 is shown in FIG. And as shown in FIG. 4, the recessed part D2 is provided. On the inner peripheral surface of the recess D2, a surface connecting the joining surface L2 where the flange portion 11b contacts the end surface S2 of the core portion 11a and the end surface S4 is referred to as a connection surface S8.

  Here, as shown in FIG. 5, the component v8y in the y-axis direction of the normal vector v8, which is one of the normal vectors of the connection surface S8, is negative. In addition, the y-axis direction component of other normal vectors in the connection surface S8 is also negative. Further, the negative direction side in the y-axis direction is one of the protruding directions of the flange portion 11b (first orthogonal direction). That is, all the normal vectors of the connection surface S8 have a component in the direction (first orthogonal direction) in which the flange portion 11b projects from the core portion 11a. In addition, the negative direction side of the y-axis is a die-cutting direction of a male die 60 described later.

  Further, all the normal vectors of the connection surface S8 have a component in the direction (first orthogonal direction) in which the flange portion 11b extends from the core portion 11a. Thereby, as shown in FIG. 5, when the line of sight 201 is directed to the connection surface S8 from the eye 200 located on the negative direction side in the y-axis direction, that is, a direction (predetermined direction) orthogonal to the axis of the core portion 11a. When the connection surface S8 is viewed from above, the entire connection surface S8 can be visually recognized. That is, the connection surface S8 is configured by a visually recognizable surface.

  An angle located on the negative side in the x-axis direction of the flange portion 11c and on the positive direction side in the y-axis direction, that is, the center in the z-axis direction of the corner formed by the adjacent surface S101 and the end surface S5 is shown in FIG. And as shown in FIG. 3, the recessed part D3 is provided. On the inner peripheral surface of the recess D3, the surface connecting the joining surface L3 and the end surface S5 where the flange portion 11c contacts the end surface S1 of the core portion 11a is referred to as a connection surface S9.

  Here, as shown in FIG. 5, the component v9y in the y-axis direction of the normal vector v9, which is one of the normal vectors of the connection surface S9, is positive. Further, components in the y-axis direction of other normal vectors in the connection surface S9 are also positive. Further, the positive direction side in the y-axis direction is one of the protruding directions of the flange portion 11c (first orthogonal direction). That is, all the normal vectors of the connection surface S9 have a component in the direction (first orthogonal direction) in which the flange portion 11b protrudes from the core portion 11a. In addition, the positive direction side in the y-axis direction is a die-cutting direction of the male die 50 described later.

  Further, all the normal vectors of the connection surface S9 have a component in the direction (first orthogonal direction) in which the flange portion 11b protrudes from the core portion 11a. Thereby, as shown in FIG. 5, when the line of sight 201 is directed to the connection surface S9 from the eye 200 located on the positive direction side in the y-axis direction, that is, a direction (predetermined direction) orthogonal to the axis of the core part 11a. When the connection surface S9 is viewed from above, the entire connection surface S9 is visible. That is, the connection surface S9 is configured by a visually recognizable surface.

  The angle in the negative direction side in the x-axis direction of the flange portion 11c and the negative direction side in the y-axis direction, that is, the center in the z-axis direction of the corner formed by the adjacent surface S101 and the end surface S6 is shown in FIG. As shown in FIG. 4, a recess D4 is provided. On the inner peripheral surface of the recess D4, a surface connecting the joining surface L4 and the end surface S6 where the flange portion 11c contacts the end surface S2 of the core portion 11a is referred to as a connection surface S10.

  Here, as shown in FIG. 5, the component v10y in the y-axis direction of the normal vector v10, which is one of the normal vectors of the connection surface S10, is negative. In addition, the y-axis direction component of other normal vectors on the connection surface S10 is also negative. Further, the negative direction side in the y-axis direction is one of the protruding directions of the flange portion 11b (first orthogonal direction). That is, all the normal vectors of the connection surface S10 have a component in the direction (first orthogonal direction) in which the flange portion 11b protrudes from the core portion 11a. In addition, the negative direction side in the y-axis direction is a die-cutting direction of a male die 60 described later.

  Further, all the normal vectors of the connection surface S10 have a component in the direction (first orthogonal direction) in which the flange portion 11c extends from the core portion 11a. Thereby, as shown in FIG. 5, when the line of sight 201 is directed to the connection surface S10 from the eye 200 located on the negative direction side in the y-axis direction, that is, a direction (predetermined direction) orthogonal to the axis of the core portion 11a. When the connection surface S10 is viewed from above, the entire connection surface S10 is visible. That is, the connection surface S10 is configured by a visually recognizable surface.

  The widths in the z-axis direction of the connection surfaces S7 to S10 are substantially the same as the widths of the end surfaces S1 and S2 in the z-axis direction, as shown in FIGS. Moreover, as shown in FIG.2 and FIG.4, connection surface S7-S10 is extended in the same direction as the x-axis direction which is the extension direction of the core part 11a.

Furthermore, as shown in FIG. 3, the cross sections of the connection surfaces S7 to S10 form an arc when viewed from the z-axis direction. Thereby, the connection surface S7 is located in the axial direction of the core portion 11a from the joint portion L1 and moves toward the main surface S30 of the flange portion 11b facing the adjacent surface S100, that is, from the joint portion L1 to x. As it goes to the negative direction side in the axial direction, a shape is formed in which the distance in the y-axis direction between the connection surface S7 and the end surface S3 decreases. The connection surface S8 is located in the axial direction of the core portion 11a from the joint portion L2 and moves toward the main surface S30 of the flange portion 11b facing the adjacent surface S100, that is, from the joint portion L2 in the x-axis direction. As it progresses to the negative direction side, it forms a shape in which the distance in the y-axis direction between the connection surface S8 and the end surface S4 decreases. The connection surface S9 is located in the axial direction of the core portion 11a from the joint portion L3 and moves toward the main surface S31 of the flange portion 11c facing the adjacent surface S101, that is, from the joint portion L3 to the positive in the x-axis direction. As it goes to the direction side, the shape in which the distance in the y-axis direction between the connection surface S9 and the end surface S5 decreases is formed. The connection surface S10 is located in the axial direction of the core portion 11a from the joint portion L4 and moves toward the main surface S31 of the flange portion 11c facing the adjacent surface S101, that is, from the joint portion L4 to the positive in the x-axis direction. As it goes to the direction side, the shape in which the distance in the y-axis direction between the connection surface S10 and the end surface S6 decreases is formed.
The x-axis direction corresponds to the “axial direction” of the present invention. The y-axis direction corresponds to the “first orthogonal direction” of the present invention. The z-axis direction corresponds to the “second orthogonal direction” of the present invention.
The y-axis direction corresponds to the “predetermined direction” of the present invention. The z-axis direction corresponds to the “orthogonal direction” of the present invention.

  The electrodes 12a and 12b are made of, for example, a Ni-based alloy such as Ni—Cr, Ni—Cu, or Ni / Ag, Cu, Sn, or the like. Further, as shown in FIG. 1, the electrode 12a is provided on the end surface (first end surface) on the negative direction side in the z-axis direction of the flange portion 11b, and the electrode 12b is formed on the flange portion 11c as shown in FIG. Is provided on the end surface on the negative direction side in the z-axis direction (second orthogonal direction). The electrodes 12a and 12b are electrically connected to the electrodes of the circuit board by solder or the like when the wound electronic component 10 is mounted on the circuit board.

  As shown in FIG. 1, the winding wire 13 is wound around the winding core portion 11a. Further, both ends of the winding 13 are connected to the electrodes 12a and 12b, respectively.

  The protective material 14 is comprised with resin compositions, such as an epoxy resin, for example. Further, the protective material 14 is provided on the surface of the core 11 on the positive direction side in the z-axis direction so as to cover the entire winding 13 and the flanges 11b and 11c.

(Method for manufacturing wire wound electronic components)
Below, the manufacturing method of the winding type electronic component 10 is demonstrated, referring drawings. FIG. 7 is an external perspective view of the female mold 30 for producing the core 11 of the wire wound electronic component. FIG. 8 is a cross-sectional view when the male molds 50 and 60 are pulled out after the core material filled in the female mold 30 is pressurized by the male molds 50 and 60. 7 and 8, the axis corresponding to the extending direction of the central axis of the core part 11a of the core 11 is defined as the x axis. Further, an axis corresponding to the male die-cutting direction is defined as the y-axis. Further, a normal line of a plane including the x axis and the y axis is defined as the z axis.

  First, a powder composed mainly of ferrite as a material of the core 11 is prepared. Next, the prepared ferrite powder is filled in the through hole H31 of the female mold 30 shown in FIG. The through hole H31 penetrates the female mold 30 in the y-axis direction. A plurality of through holes H31 are provided in the female mold 30 so as to be arranged on the matrix. Furthermore, when viewed from the y-axis direction, the through hole H31 has an H shape that is substantially the same as the shape of the core 11 shown in FIGS.

  Next, as shown in FIG. 8, the core 11 is molded by pressing the filled powder using male dies 50 and 60. More specifically, the male dies 50 and 60 oppose each other in the y-axis direction with the female die 30 interposed therebetween. The male mold 50 pressurizes the powder filled in the female mold 30 from the positive direction side in the y-axis direction to the negative direction side. The male mold 60 pressurizes the powder filled in the female mold 30 from the negative direction side in the y-axis direction to the positive direction substantially simultaneously with the male mold 50 pressing the powder. At this time, pressurization is performed only once. The density of the core 11 after molding is adjusted by the filling amount of the ferrite powder into the female mold and the pressing amount of pressing.

  By the way, the pressing surfaces S51, S53, S55, S57, and S59 of the male mold 50 used for pressing are formed in a shape corresponding to the core 11 shown in FIG. More specifically, as shown in FIG. 8, the pressing surface S51 corresponds to the end surface S1 of the core portion 11a. The pressing surface S53 corresponds to the end surface S3 of the flange portion 11b. Further, the pressing surface S55 corresponds to the end surface S5 of the flange portion 11c. Therefore, the pressing surfaces S53, S51, and S55 are arranged in this order from the negative direction side to the positive direction side in the x-axis direction. Further, since the end surface S3 and the end surface S5 are located on the positive side in the y-axis direction with respect to the end surface S1, the pressurization surfaces S53 and S55 are located on the positive direction side in the y-axis direction with respect to the pressurization surface S51. Furthermore, the pressing surface S57 (first pressing surface) corresponds to the connection surface S7 of the flange portion 11b. Thereby, the pressing surface S57 connects the pressing surface S51 and the pressing surface S53. Further, the pressing surface S59 (first pressing surface) corresponds to the connection surface S9 of the flange portion 11b. Thereby, the pressing surface S59 connects the pressing surface S51 and the pressing surface S55.

  As shown in FIG. 9, the component v57y in the y-axis direction of the normal vector v57, which is one of the normal vectors of the pressure surface S57, is negative. Further, the components in the y-axis direction of other normal vectors on the pressing surface S57 are also negative. Furthermore, the negative direction side in the y-axis direction is the direction opposite to the die-cutting direction of the male die 50. Accordingly, all the normal vectors of the pressing surface S57 have a component in the direction opposite to the direction in which the male mold 50 is punched.

  Further, all the normal vectors of the pressing surface S57 have a component in the direction opposite to the die-cutting direction of the male die 50. As a result, as shown in FIG. 9, when the pressurizing surface S57 is viewed from the die-cutting direction of the male mold 50, the entire pressurizing surface S57 is visible. That is, the pressurizing surface S57 is configured by a surface that is visible when viewed from the direction in which the male mold 50 is removed.

  As shown in FIG. 9, the component v59y in the y-axis direction of the normal vector v59, which is one of the normal vectors of the pressing surface S59, is negative. Further, the y-axis direction component of other normal vectors on the pressing surface S59 is also negative. Furthermore, the negative direction side in the y-axis direction is the direction opposite to the die-cutting direction of the male die 50. Therefore, all the normal vectors of the pressing surface S59 have a component in the direction opposite to the direction in which the male mold 50 is punched.

  Further, all the normal vectors of the pressing surface S59 have a component in the direction opposite to the die-cutting direction of the male die 50. As a result, as shown in FIG. 9, when the pressing surface S59 is viewed from the direction in which the male mold 50 is removed, the entire pressing surface S59 is visible. That is, the pressurizing surface S59 is configured by a surface that is visible when viewed from the direction in which the male mold 50 is removed.

  The pressing surfaces S62, S64, S66, S68, and S70 of the male mold 60 are formed in a shape corresponding to the core 11 shown in FIG. More specifically, as shown in FIG. 8, the pressing surface S62 corresponds to the end surface S2 of the core part 11a. The pressing surface S64 corresponds to the end surface S4 of the flange portion 11b. Furthermore, the pressing surface S66 corresponds to the end surface S6 of the flange portion 11c. Accordingly, the pressing surfaces S64, S62, and S66 are arranged in this order from the negative direction side to the positive direction side in the x-axis direction. Further, since the end surface S4 and the end surface S6 are located on the negative side in the y-axis direction with respect to the end surface S2, the pressurization surfaces S64 and S66 are located on the negative direction side in the y-axis direction with respect to the pressurization surface S62. Further, the pressing surface S68 (first pressing surface) corresponds to the connection surface S8 of the flange portion 11c. Thus, the pressing surface S68 connects the pressing surface S62 and the pressing surface S64. Further, the pressing surface S70 (first pressing surface) corresponds to the connection surface S10 of the flange portion 11c. Thus, the pressure surface S70 connects the pressure surface S62 and the pressure surface S66.

  As shown in FIG. 10, the component v68y in the y-axis direction of the normal vector v68, which is one of the normal vectors of the pressing surface S68, is positive. Further, the components in the y-axis direction of other normal vectors on the pressing surface S68 are also positive. Furthermore, the positive direction side in the y-axis direction is the direction opposite to the die-cutting direction of the male die 60. Therefore, all the normal vectors of the pressing surface S68 have a component in the direction opposite to the die-cutting direction of the male die 60.

  Further, all the normal vectors of the pressing surface S68 have a component in the direction opposite to the die-cutting direction of the male die 60. As a result, as shown in FIG. 10, when the pressure surface S <b> 68 is viewed from the die-cutting direction of the male mold 60, the entire surface of the pressure surface S <b> 68 is visible. That is, the pressing surface S68 is configured by a surface that is visible when viewed from the direction in which the male mold 60 is removed.

  As shown in FIG. 10, the component v70y in the y-axis direction of the normal vector v70, which is one of the normal vectors of the pressing surface S70, is positive. In addition, components in the y-axis direction of other normal vectors on the pressing surface S70 are also positive. Furthermore, the positive direction side in the y-axis direction is the direction opposite to the die-cutting direction of the male die 60. Therefore, all the normal vectors of the pressing surface S68 have a component in the direction opposite to the die-cutting direction of the male die 60.

  Further, all the normal vectors of the pressing surface S70 have components in the direction opposite to the punching direction of the male mold 60. Thereby, when the pressurization surface S70 is seen from the die-cutting direction of the male mold 60, the entire surface of the pressurization surface S70 is visible. That is, the pressurizing surface S70 is configured by a surface that is visible when viewed from the die-cutting direction of the male mold 60.

The widths in the z-axis direction of the pressing surfaces S51, S57, and S59 are substantially the same because they correspond to the end surfaces S1, S7, and S9 of the core 11 shown in FIG. Further, the widths of the pressing surfaces S62, S68, and S70 in the z-axis direction are substantially the same because they correspond to the end surfaces S2, S8, and S10 of the core 11 shown in FIG.

  The pressing surfaces S51, S57, and S59 correspond to the end surfaces S1, S7, and S9 of the core 11 shown in FIG. 2, and thus extend in the x-axis direction, which is the extending direction of the central axis of the core portion 11a. ing. Further, the pressing surfaces S62, S68, and S70 also correspond to the end surfaces S2, S8, and S10 of the core 11 shown in FIG. 4, and therefore, in the x-axis direction that is the extending direction of the central axis of the core portion 11a. It is extended.

  Furthermore, the cross sections of the pressing surfaces S57, S59, S68, and S70 form an arc when viewed from the z-axis direction, as shown in FIG. As a result, the pressing surface S57 moves from the pressing surface S51 side to the pressing surface S53 side, that is, from the pressing surface S51 side to the negative direction side in the x-axis direction, the y-axis direction of the pressing surface S57 and the pressing surface S53. The distance is reduced. As the pressure surface S59 moves from the pressure surface S51 side toward the pressure surface S55 side, that is, as the pressure surface S59 moves from the pressure surface S51 side to the positive direction side in the x-axis direction, the distance between the pressure surface S59 and the pressure surface S55 in the y-axis direction decreases. The shape to make. As the pressure surface S68 moves from the pressure surface S62 side to the pressure surface S64 side, that is, from the pressure surface S62 side to the negative direction side in the x-axis direction, the distance between the pressure surface S68 and the pressure surface S64 in the y-axis direction decreases. The shape to make. As the pressure surface S70 moves from the pressure surface S62 side to the pressure surface S66 side, that is, from the pressure surface S62 side to the positive direction side in the x-axis direction, the distance between the pressure surface S70 and the pressure surface S66 in the y-axis direction decreases. The shape to make.

  Next, pressurization is completed, and the core 11 paid out from the female die is fired. Firing is performed using a tunnel furnace. The tunnel furnace is divided into a plurality of zones, and the temperature is controlled for each zone. For example, the predetermined zone is managed at 1000 ° C., and the core 11 passes through this zone for 1 hour. Thereafter, in order to remove burrs generated in the fired core 11, barrel polishing is performed.

  Next, a film of Ni-based alloy such as Ni—Cr, Ni—Cu, or Ni and a film of Ag, Cu, Sn, etc. are sequentially formed on the flanges 11b and 11c through a mask, for example, by sputtering. Thus, the electrodes 12a and 12b are formed. The method for forming the electrodes 12a and 12b is not limited to this, and the electrodes 12a and 12b may be formed by baking or plating.

  After forming the electrodes 12a and 12b, the winding wire 13 is wound around the core portion 11a. At this time, both ends of the winding 13 are pulled out from the core part 11a by a predetermined amount. Then, the drawn portion of the winding 13 is connected to the electrodes 12a and 12b by thermocompression bonding.

  Next, the protective material 14 is applied by the Dip method so as to cover the surface on which the electrodes 12 a and 12 b are formed, the surface facing the core 11 and the winding 13. Furthermore, after the protective material 14 is dried and cured, the wound electronic component 10 is completed.

(effect)
In the wound electronic component 10, instead of the tapered surfaces S501 ′ to S504 ′ provided at the end of the winding core portion 501a of the wound coil component 500 ′ shown in FIG. Concave portions D1 to D4 are provided in the portions 11b and 11c. And each normal vector of connection surface S7-S10 which is a part of inner peripheral surface of this recessed part D1-D4 is the direction (1st orthogonal direction) where the collar parts 11b and 11c protrude from the core part 11a. It has the ingredients. That is, the connection surfaces S7 to S10 are configured by surfaces that are visible when viewed from the y-axis direction, which is the mold release direction. Therefore, as shown in FIG. 8, simultaneously with the start of die cutting, the pressing surfaces S57, S59, S68, S70 of the male dies 50, 60 and the connecting surfaces S7-S10 of the flanges 11b, 11c are separated. As a result, the friction between the pressing surfaces S57, S59, S68, and S70 of the male dies 50 and 60 and the connecting surfaces S7 to S10 of the flanges 11b and 11c is suppressed, and the occurrence of cracks and cracks in the core 11 is suppressed. The

  In the wound electronic component 10, as shown in FIGS. 2 to 4, since the connection surfaces S <b> 7 to S <b> 10 are provided on the flange portions 11 b and 11 c, no taper surface is provided on the winding core portion 11 a. . Thereby, in the winding type electronic component 10, the area | region where the coil | winding in the core part 11a of the core 11 is wound can be extended to the edge part of the core part 11a. Accordingly, if windings having the same wire diameter are used in the wound coil component 500 ′ and the wound electronic component 10, the number of windings is greater in the wound electronic component 10 than in the wound coil component 500 ′. Can be increased. As a result, the inductance value of the wound electronic component 10 can be made larger than that of the wound coil component 500 '.

  Moreover, in the winding type electronic component 10, the area | region where the coil | winding in the core part 11a of the core 11 is wound can be extended to the edge part of the core part 11a. As a result, if the number of turns is the same for the winding coil component 500 ′ and the winding electronic component 10, the winding electronic component 10 can select a winding having a larger wire diameter than the winding coil component 500 ′. Therefore, the resistance value of the wound electronic component 10 can be set to a value smaller than that of the wound coil component 500 '.

  Further, in the wound electronic component 10, as shown in FIG. 2, the end surface S1 of the core portion 11a of the core 11 and the connection surfaces S7 and S9 of the flange portions 11b and 11c are arranged in a line in the x-axis direction. Further, the width in the z-axis direction of the end surface S1 of the core portion 11a and the connection surfaces S7 and S9 of the flange portions 11b and 11c are substantially the same. For the reasons described above, the connecting surfaces S7 and S9 of the flange portions 11b and 11c and the end surface S1 of the winding core portion 11a are linearly arranged. Therefore, the male mold 50 that pressurizes the core 11 of the wound electronic component 10 is simple. Form.

  In the wound electronic component 10, as shown in FIG. 4, the end surface S2 of the core portion 11a of the core 11 and the connection surfaces S8 and S10 of the flange portions 11b and 11c are arranged in a line in the x-axis direction. Furthermore, the widths in the z-axis direction of the end surface S2 of the core portion 11a and the connection surfaces S8 and S10 of the flange portions 11b and 11c are substantially the same. For the reasons described above, the connecting surfaces S8 and S10 of the flange portions 11b and 11c and the end surface S2 of the winding core portion 11a are linearly arranged, so the male mold 60 that pressurizes the core 11 of the wound electronic component 10 is simple. Form.

  As shown in FIG. 3, the connection surface S7 of the core 11 in the wound electronic component 10 has a monotonically decreasing distance in the y-axis direction between the connection surface S7 and the end surface S3 as it proceeds to the negative direction side in the x-axis direction. It has a shape. The connection surface S9 also has a shape in which the distance in the y-axis direction between the connection surface S9 and the end surface S5 monotonously decreases as it advances toward the positive direction in the x-axis direction. That is, since the concavity and convexity are not provided on the connection surfaces S7 and S9, the male mold 50 that pressurizes the core 11 of the wire wound electronic component 10 has a simple shape.

  Further, as shown in FIG. 3, the connecting surface S8 of the core 11 in the wound electronic component 10 has a monotonous distance in the y-axis direction between the connecting surface S8 and the end surface S4 as it advances toward the negative side in the x-axis direction. It has a decreasing shape. The connection surface S10 also has a shape in which the distance in the y-axis direction between the connection surface S10 and the end surface S6 monotonously decreases as it proceeds toward the positive direction in the x-axis direction. That is, since the concavity and convexity are not provided on the connection surfaces S8 and S10, the male mold 60 that pressurizes the core 11 of the wire wound electronic component 10 has a simple shape.

(First modification)
The wound electronic component 10-1 according to the first modification will be described below with reference to the drawings. FIG. 11 is a plan view of the core 11-1 of the wire wound electronic component 10-1 according to the first modification from the positive direction side in the y-axis direction. 12 is a cross-sectional view taken along line BB of the core 11-1 of the wound electronic component 10-1 according to the first modification shown in FIG. FIG. 13 is a plan view of the core 11-1 of the wound electronic component 10-1 according to the first modification from the negative direction side in the y-axis direction.

  The difference between the wound electronic component 10 and the wound electronic component 10-1 is the shape of the connection surfaces S7 to S10. Since the other points are not different between the wound electronic component 10 and the wound electronic component 10-1, description thereof will be omitted. The male molds that pressurize the core 11-1 in the wound electronic component 10-1 are male molds 50-1 and 60-1. Further, the connection surfaces are connection surfaces S7-1, S8-1, S9-1, and S10-1. In addition, in FIGS. 11 to 13 representing the core 11-1 of the wound electronic component 10-1, the same reference numerals as those of the core 11 are given to the same configurations as those of the core 11 of the wound electronic component 10.

  As shown in FIG. 12, the connection surfaces S7-1 to S10-1 are not curved surfaces like the connection surfaces S7 to S10, but are flat surfaces. More specifically, the connection surface S7-1 is located in the axial direction of the core portion 11a from the joint portion L1 and goes toward the main surface S30 of the flange portion 11b facing the adjacent surface S100, that is, the joint portion. The distance in the y-axis direction between the connection surface S7-1 and the end surface S3 decreases at a constant rate as it proceeds from the L1 side to the negative direction side in the x-axis direction. The connection surface S8-1 is located in the axial direction of the core portion 11a from the joint portion L2 and goes toward the main surface S30 of the flange portion 11b facing the adjacent surface S100, that is, from the joint portion L2 side to the x axis. The distance in the y-axis direction between the connection surface S8-1 and the end surface S4 decreases at a constant rate as the direction proceeds to the negative direction side. The connection surface S9-1 is located in the axial direction of the winding core portion 11a from the joint portion L3 and moves toward the main surface S31 of the flange portion 11c that is the adjacent surface S101, that is, from the joint portion L3 side in the x-axis direction. As proceeding to the positive direction side, the distance in the y-axis direction between the connection surface S9-1 and the end surface S5 decreases at a constant rate. The connection surface S10-1 is located in the axial direction of the winding core portion 11a from the joint portion L4 and moves toward the main surface S31 of the flange portion 11c facing the adjacent surface S101, that is, from the joint portion L4 side to the x axis. The distance in the y-axis direction between the connection surface S10-1 and the end surface S6 decreases at a constant rate as the direction proceeds to the positive direction side.

  In the wound electronic component 10-1 configured as described above, since the shapes of the connection surfaces S <b> 7-1 to S <b> 10-1 are flat, it is compared with the shapes of the connection surfaces S <b> 7 to S <b> 10 of the wound electronic component 10. And simpler. Therefore, the male dies 50-1 and 60-1 that pressurize the core 11-1 of the wound electronic component 10-1 are more in comparison with the male dies 50 and 60 that pressurize the core 11 of the wound electronic component 10. It has a simple shape.

(Second modification)
The wound electronic component 10-2 according to the second modification will be described below with reference to the drawings. FIG. 14 is a plan view of the core 11-2 of the wire wound electronic component 10-2 according to the second modification from the positive direction side in the y-axis direction. 15 is a cross-sectional view taken along the line CC of the core 11-2 of the wire wound electronic component 10-2 according to the second modification shown in FIG. FIG. 16 is a plan view of the core 11-2 of the wire wound electronic component 10-2 according to the second modification from the negative direction side in the y-axis direction. FIG. 17 is a cross-sectional view taken along line EE of the core 11-2 of the wire wound electronic component 10-2 according to the second modification shown in FIG. 18 is a cross-sectional view taken along the line FF of the core 11-2 of the wire wound electronic component 10-2 according to the second modification shown in FIG.

  The difference between the wound electronic component 10 and the wound electronic component 10-2 is the shape of the recesses D1 to D4. Since the other points are not different between the wound electronic component 10 and the wound electronic component 10-2, description thereof will be omitted. The male molds that pressurize the core 11-2 in the wound electronic component 10-2 are referred to as male molds 50-2 and 60-2. In addition, connection surfaces in the wound electronic component 10-2 are connection surfaces S7-2, S8-2, S9-2, and S10-2. Further, in FIGS. 14 to 18 showing the core 11-2 of the wound electronic component 10-2, the same reference numerals as those of the core 11 are given to the same configurations as the core 11 of the wound electronic component 10.

  As shown in FIG. 15, the connection surface S7-2 in the wound electronic component 10-2 includes a plane including the x-axis and the y-axis from the joint portion L1 to the inclination start portion L5 where the inclination of the connection surface S7-2 starts. (Hereinafter referred to as the xy plane). And from the inclination start part L5, it is located in the axial direction of the core part 11a, and it goes to the main surface S30 of the collar part 11b facing the adjacent surface S100, and the y-axis direction of the connection surface S7-2 and the end surface S3 The distance of decreases. The connection surface S8-2 is parallel to the xy plane from the joint portion L2 to the inclination start portion L6 where the inclination of the connection surface S8-2 starts. And the distance of the connection surface S8-2 and end surface S4 in the y-axis direction is located in the axial direction of the core portion 11a from the inclination start portion L6 and toward the main surface S30 of the flange portion 11b facing the adjacent surface S100. Decrease. The connection surface S9-2 is parallel to the xy plane from the joint portion L3 to the inclination start portion L7 where the inclination of the connection surface S9-2 starts. And from the inclination start part L7, it is located in the axial direction of the core part 11a, and goes to the main surface S31 of the collar part 11c facing the adjacent surface S101, and the y-axis direction of the connection surface S9-2 and the end surface S5 The distance of decreases. The connection surface S10-2 is parallel to the xy plane from the joint portion L4 to the inclination start portion L8 where the inclination of the connection surface S10-2 starts. And the distance of the connecting surface S10-2 and the end surface S6 in the y-axis direction decreases from the inclination start portion L8 toward the main surface S31 of the flange portion 11c positioned in the axial direction of the core portion 11a.

  As with the wound electronic component 10, the wound electronic component 10-2 configured as described above is also capable of winding the core 11-2 of the wound electronic component while preventing chipping and cracking during molding of the core. The area | region where the coil | winding in the core part 11a is wound can be extended to the edge part of this core part.

  Further, in the wound electronic component 10-2, as shown in FIGS. 17 and 18, the normals of the adjacent surfaces S11 to S18 adjacent to the connection surfaces S7-2 to S10-2 in the z-axis direction are also obtained. All the vectors have a component in the direction (first orthogonal direction) in which the flange portions 11b and 11c protrude from the core portion 11a. That is, it is configured by a surface that is visible when viewed from the y-axis direction that is the die-cutting direction. Thereby, simultaneously with the start of die cutting, the male pressing surface corresponding to the adjacent surfaces S11 to S18 and the adjacent surfaces S11 to S18 are separated. Therefore, the friction between the adjacent surfaces S11 to S18 and the male dies 50-2 and 60-2 during die cutting is suppressed. Therefore, in the wound electronic component 10-2, the occurrence of chipping and cracking of the core 11-2 on the adjacent surfaces S11 to S18 in addition to the connection surfaces S7-2 to S10-2 can be suppressed.

(Third Modification)
Hereinafter, a wound electronic component 10-3 according to a third modification will be described with reference to the drawings. FIG. 19 is a plan view of the core 11-3 of the wire wound electronic component 10-3 according to the third modified example from the positive direction side in the y-axis direction. FIG. 20 is a cross-sectional view at GG of the core 11-3 of the wire wound electronic component 10-3 according to the third modification shown in FIG. FIG. 21 is a plan view of the core 11-3 of the wire wound electronic component 10-3 according to the third modification from the negative direction side in the y-axis direction.

  The difference between the wound electronic component 10 and the wound electronic component 10-3 is the shape of the connection surfaces S7 to S10. Since the other points are not different between the wound electronic component 10 and the wound electronic component 10-3, description thereof will be omitted. In addition, let the connection surface in the winding type | mold electronic component 10-3 be connection surface S7-3, S8-3, S9-3, S10-3. In FIG. 19 to FIG. 21 showing the wound electronic component 10-3, the same reference numerals as those of the core 11 are given to the same configurations as the core 11 of the wound electronic component 10.

  The connecting surface of the core of the wire wound electronic component according to the present invention may include irregularities like connecting surfaces S7-3 to S10-3 shown in FIG. More specifically, in the connection surface S7-3, the distance between the connection surface S7-3 and the end surface S3 in the y-axis direction increases from the joint portion L1 toward the predetermined portion L9 in the connection surface S7-3. Then, the distance between the connecting surface S7-3 and the end surface S3 in the y-axis direction from the predetermined portion L9 toward the main surface S30 of the flange portion 11b that is located in the axial direction of the core portion 11a and faces the adjacent surface S100. Decrease. In the connection surface S8-3, the distance between the connection surface S8-3 and the end surface S4 in the y-axis direction increases from the joint portion L2 toward the predetermined portion L10 in the connection surface S8-3. And the distance of the connection surface S8-3 and the end surface S4 in the y-axis direction is located from the predetermined portion L10 in the axial direction of the core portion 11a and toward the main surface S30 of the flange portion 11b facing the adjacent surface S100. Decrease. In the connection surface S9-3, the distance between the connection surface S9-3 and the end surface S5 in the y-axis direction increases from the joint portion L3 toward the predetermined portion L11 in the connection surface S9-3. Then, the distance in the y-axis direction between the connection surface S9-3 and the end surface S5 increases from the predetermined portion L11 toward the main surface S31 of the flange portion 11c that is positioned in the axial direction of the core portion 11a and faces the adjacent surface S101. Decrease. In the connection surface S10-3, the distance between the connection surface S10-3 and the end surface S6 in the y-axis direction increases from the joint portion L4 toward the predetermined portion L12 in the connection surface S10-3. Then, from the predetermined portion L12 toward the main surface S31 of the flange portion 11c that is located in the axial direction of the core portion 11a and faces the adjacent surface S1010, the connection surface S10-3 and the end surface S6 in the y-axis direction The distance decreases.

  Similarly to the wound electronic component 10, the wound electronic component 10-3 configured as described above is also capable of preventing the chipping and cracking during the molding of the core 11-3, and the core 11- of the wound electronic component. The area | region where the coil | winding in 3 core part 11a is wound can be extended to the edge part of this core part.

(Other embodiments)
The winding type electronic component, the core of the winding type electronic component, and the method of manufacturing the core of the winding type electronic component according to the present invention include the winding type electronic components 10, 10-1, 10-2, 10-3 according to the above embodiments, Not only the manufacturing method of the cores 11, 11-1, 11-2, 11-3 of the wound type electronic component and the core of the wound type electronic component can be changed within the scope of the gist thereof. For example, the electrode of the wound electronic component according to the present invention includes a z-axis positive surface, a y-axis positive surface, a y-axis negative surface, and an x-axis direction. It may be provided on any of the side surfaces.

  As described above, the present invention is useful for a wound electronic component, a core of a wound electronic component, and a method for manufacturing a core of a wound electronic component, and in particular, while preventing chipping and cracking during molding of the core, The region where the winding is wound in the core part of the wound electronic component is excellent in that it can be extended to the end of the core part.

D1-D4 Recess S1-S6 End surface S7, S7-1-3, S8, S8-1-3, S9, S9-1-3, S10, S10-1-3 Connection surface S11-S18, S100, S101 Adjacent surface S30, S31 main surface v7 to v10, v57, v59, v68, v70 Normal vector 10, 10-1, 10-2, 10-3 Wire wound electronic component 11, 11-1, 11-2, 11-3 Core 12a, 12b Electrode 13 Coil 14 Protective material

Claims (13)

A winding core around which the winding is wound;
A flange provided at both ends of the core, the flange extending around the core toward a direction perpendicular to the axial direction of the core;
With
A concave portion is provided at a corner formed by an adjacent surface of the flange portion adjacent to the core portion and an end surface located in a first orthogonal direction that is one of the protruding directions of the flange portion,
The connection surface that connects the end portion and the joint portion where the flange portion is in contact with the core portion is at least a part of the inner peripheral surface of the recess,
The second orthogonal direction is orthogonal to the first orthogonal direction and the axial direction,
An electrode is provided on an end surface of the collar portion located in the second orthogonal direction;
All the normal vectors of the connecting surfaces have components in the first orthogonal direction;
Wound-type electronic component core. The first orthogonal direction is a mold release direction of a mold for molding the core of the wound electronic component;
The core of the wound electronic component according to claim 1. When viewed from the front Symbol first orthogonal direction that the width of the second orthogonal direction in the connection surface is the same direction perpendicular to the width of the second and in the core portion,
The core of the wound electronic component according to claim 1, wherein the core is a wound electronic component. The connection surface is positioned in the axial direction of the core portion from the adjacent surface of the flange portion, and extends toward the main surface of the flange portion facing the adjacent surface, in the first orthogonal direction. A shape in which the distance between the connecting surface and the end surface is reduced;
The core of the wire wound electronic component according to any one of claims 1 to 3. A winding core around which the winding is wound;
A flange provided at both ends of the core, the flange extending around the core toward a direction perpendicular to the axial direction of the core;
With
A concave portion is provided at a corner formed by an adjacent surface of the flange portion adjacent to the winding core portion and an end surface located in a protruding direction of the flange portion,
The connection surface that connects the joint portion where the flange portion is in contact with the core portion and the end surface is the inner peripheral surface of the recess, and is visible from the predetermined direction when viewed from a predetermined direction orthogonal to the axial direction. and it is constituted by possible surface,
The second orthogonal direction is orthogonal to the predetermined direction and the axial direction,
An electrode is provided on an end surface of the flange portion located in the second orthogonal direction;
Wound-type electronic component core. The predetermined direction is a die-cutting direction of a mold for molding the core of the wound electronic component;
The core of the wound electronic component according to claim 5 . When viewed from the predetermined direction, said width of said connecting surface in a second orthogonal direction is the same as the width in said second direction perpendicular to the winding core portion,
The core of the wound electronic component according to claim 5 or 6 , wherein the core is a wound electronic component. The connection surface is located in the axial direction of the core portion from the adjacent surface of the flange portion, and the connection surface in the predetermined direction toward the main surface of the flange portion facing the adjacent surface. Having a shape in which the distance from the end face decreases,
A core of a wound electronic component according to any one of claims 5 to 7 . A core of the wound electronic component according to any one of claims 1 to 8 ,
A winding wound around the core portion of the core;
Providing
Wound-type electronic parts characterized by A core part around which the winding is wound, and flanges provided at both ends of the core part, and around the core part in a direction perpendicular to the axial direction of the core part. A method for manufacturing a core of a wound electronic component comprising:
A first step of filling the female mold with the core material;
A second step of pressing the core material filled in the female mold with a male mold;
A third step of forming an electrode on the collar;
With
In the second step, the connecting surface that connects the joint portion where the flange portion is in contact with the core portion and the end surface located in the protruding direction of the flange portion is the flange portion adjacent to the core portion and the end surface. Is at least part of the inner peripheral surface of the recess provided in the corner formed by
The second orthogonal direction is orthogonal to the die cutting direction and the axial direction,
The electrode is formed on an end surface of the collar portion located in the second orthogonal direction,
The normal vectors of the male first pressing surface that pressurizes the connection surface all have a component in a direction opposite to the die-cutting direction;
A method for manufacturing a core of a wound electronic component. A core part around which the winding is wound, and a flange part provided at one end of the core part, around the core part in a direction perpendicular to the axial direction of the core part A method for manufacturing a core of a wound electronic component comprising:
A first step of filling the female mold with the core material;
A second step of pressing the core material filled in the female mold with a male mold;
A third step of forming an electrode on the collar;
With
In the second step, the connecting surface that connects the joint portion where the flange portion is in contact with the core portion and the end surface located in the protruding direction of the flange portion is an adjacent surface of the flange portion adjacent to the core portion. And an inner peripheral surface of a recess provided in a corner formed by the end surface,
The second orthogonal direction is orthogonal to the die cutting direction and the axial direction,
The electrode is formed on an end surface of the collar portion located in the second orthogonal direction,
The male first pressurizing surface for pressurizing the connection surface is constituted by a surface that is visible when viewed from the mold release direction;
A method for manufacturing a core of a wound electronic component. When viewed from the die-cutting direction, the width of the first pressurizing surface in the orthogonal direction perpendicular to the die-cutting direction and the axial direction is the orthogonal direction in the second pressurizing surface that pressurizes the core portion. The width of the
Method for producing a wire wound electronic component of the core according to claim 10 or claim 1 1, characterized in. The first pressurizing surface extends from the adjacent surface of the flange portion toward the main surface of the flange portion located in the direction opposite to the adjacent surface in the axial direction of the core portion, Forming a shape in which the distance in the die-cutting direction is reduced with a third pressurizing surface that pressurizes the projecting end surface of the flange portion;
Method for producing a wire wound electronic component of the core according to any one of claims 10 to 1 2, characterized in.

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