JP2005285901A - Electronic component and manufacturing method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inductor having high degree of accuracy for concentricity, in which the center of a drum core coincides with that of a ring core in the high accuracy. <P>SOLUTION: The drum core 20 including an upper collar 21, a lower collar 23, and a coil 25 is provided, and the ring core 30, including a through-hole 31 is also provided. Moreover, a bottom 41 and a circumferential wall 42 are also provided. Further, a first terminal 40a including an engaging part 43 which is engaged with a coil 50 and is narrower than the circumferential wall 42, a second terminal 40b, which includes a bottom part 41, circumferential wall 42, and engaging part 43, and is arranged opposite to the first terminal 40a via a gap 44, are also provided. In addition, with this opposing allocation, a fitting part 45 is formed. Moreover, the engaging part 43 of the first terminal 40a and the circumferential wall 42 of the second terminal 40b, and the engaging part 43 of the second terminal 40b and the circumferential wall part 42 of the first terminal 40a, are respectively isolated through separation and bending. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an electronic component and a method for manufacturing the electronic component.

  In recent years, in order to meet the demand for increasing the mounting density of circuit boards and reducing the size of electronic devices, inductors are also required to be smaller and thinner and to have electrical performance that allows large currents to flow. As a type of conventional inductor, there is known a type in which a winding is wound around a drum core and a ring core is disposed in a state of being opposed to the drum core. By the way, in this type of inductor, when the miniaturization progresses, it becomes difficult to keep the gap between the drum core and the ring core constant. That is, it becomes difficult to maintain the concentricity (coaxiality) between the drum core and the ring core.

  Here, as a technique regarding positioning between the drum core and the ring core in such an inductor, there is one disclosed in Patent Document 1. According to the technique disclosed in Patent Document 1, the drum core is positioned by the positioning portion and the notch portion of the drum core, and the side surface of the ring core is held by the side surface holding portion. Positioning is made between.

JP 2003-217842 A (paragraph number 0032, see FIG. 1)

  According to the technique disclosed in Patent Document 1 described above, it is difficult to maintain the concentricity (coaxiality) between the drum core and the ring core with high accuracy. That is, in the configuration disclosed in Patent Document 1, the side surface holding portion and the positioning portion are formed by cutting and raising, and the side surface holding portion and the like are thin and easily bent. For this reason, it is difficult to maintain the concentricity (coaxiality) between the drum core and the ring core with high accuracy and make these gaps uniform with high accuracy over the entire circumference.

  In particular, in the current situation where miniaturization of inductors is progressing, such gaps are likely to be non-uniform, but even in such small inductance elements, the gap between the drum core and the ring core is uniform with high accuracy. It is hoped that

  The present invention has been made on the basis of the above circumstances, and an object of the present invention is to provide an electronic component having a highly accurate coaxiality in which the center of the drum core and the center of the ring core coincide with each other with high accuracy. To try to provide.

  In order to solve the above problems, the present invention has an upper collar part and a lower collar part, a drum core having a winding part surrounded by the upper collar part and the lower collar part and wound with a winding, It has an insertion hole through which the drum core is inserted, and includes a ring core in which the upper or lower flange portion of the drum core and the inner wall surface of the insertion hole face each other in the inserted state of the drum core, and a bottom portion and a peripheral wall portion. And a first terminal having a binding portion that is wound around the winding and is narrower than the peripheral wall portion and is continuous with the peripheral wall portion; a bottom portion and a peripheral wall portion; A second terminal that is narrower than the peripheral wall part and has a binding part that is continuous with the peripheral wall part, and is disposed to face the first terminal via a gap, Insertion part for fitting drum core and ring core is formed In addition, the binding portion of the first terminal and the peripheral wall portion of the second terminal, and the binding portion of the second terminal and the peripheral wall portion of the first terminal are separated and separated by bending. is there.

  In such a configuration, the drum core and the ring core are fitted into the fitting portion constituted by the first terminal and the second terminal. Thereafter, the binding portion is formed by cutting and bending, and at that time, the binding portion of the first terminal and the peripheral wall portion of the second terminal are separated, and the binding portion of the second terminal and the first The peripheral wall of the terminal is spaced apart.

  The electronic component formed in this manner is formed by fitting the drum core and the ring core into the fitting portion constituted by the first terminal and the second terminal that are initially integrated, The outer peripheral side of the ring core is firmly pressed in without causing a positional shift. Therefore, the center of the drum core and the center of the ring core can be matched with high accuracy. That is, it is possible to manufacture an electronic component having a highly accurate coaxiality (concentricity). Moreover, the clearance gap between a drum core and a ring core becomes constant over the perimeter of a drum core and a ring core.

  In such a configuration, since the drum core and the ring core are covered with a large area at the bottom and the peripheral wall of the first terminal and the second terminal, the electronic component is in a state of excellent heat dissipation and strength. It will be in an excellent state. Further, due to the presence of the large area bottom portion and the peripheral wall portion, it is possible to perform soldering or the like with a large area, for example, on a mounting portion such as a circuit board. Furthermore, since the drum core and the ring core are positioned only by being fitted into the fitting portion constituted by the first terminal and the second terminal, a dedicated jig for positioning the drum core and the ring core is not necessary. Therefore, it is possible to reduce manufacturing costs.

  In another aspect of the invention, there is provided a drum core having an upper collar part and a lower collar part, having a winding part surrounded by the upper collar part and the lower collar part and wound with a winding, and an insertion through which the drum core is inserted. A ring core having a hole, and an upper or lower flange portion of the drum core facing the inner wall surface of the insertion hole when the drum core is inserted into the insertion hole, and a peripheral wall standing from the outer peripheral edge portion of the bottom portion and the bottom portion A fitting portion for fitting the drum core and the ring core is formed by the bottom portion and the peripheral wall portion, and a gap portion is provided through the bottom portion and reaching the peripheral wall portion. And a cup body provided with a narrow portion that becomes narrow, and a binding portion for winding the winding is formed by cutting and bending the narrow portion. In which a first terminal away from each other from the body and the second terminal is formed.

  In such a configuration, the drum core and the ring core are fitted into the fitting portion of the cup body. Thereafter, the first terminal and the second terminal are formed by cutting and bending the narrow portion of the cup body.

  Since the electronic component formed in this manner is formed by fitting into the fitting portion of the cup body, the outer peripheral sides of the drum core and the ring core are firmly pressed down without causing displacement. Therefore, the center of the drum core and the center of the ring core can be matched with high accuracy. That is, it is possible to manufacture an electronic component having a high degree of coaxiality (concentricity), and the gap between the drum core and the ring core is constant over the entire circumference of the drum core and the ring core.

  In such a configuration, since the drum core and the ring core are covered with a large area at the bottom and the peripheral wall portion of the cup body, the electronic component is in a state of excellent heat dissipation and in strength. . Further, due to the presence of the large area bottom portion and the peripheral wall portion, it is possible to perform soldering or the like with a large area, for example, on a mounting portion such as a circuit board. Furthermore, since the drum core and the ring core are positioned only by being fitted into the fitting portion of the cup body, a dedicated jig for positioning the drum core and the ring core becomes unnecessary. Therefore, it is possible to reduce manufacturing costs.

  Furthermore, in another invention, in addition to the above-described inventions, a gap by bending is provided between the ring core or drum core and the binding portion. When configured in this manner, the winding can be easily entangled with the binding portion due to the presence of the gap, and a fixed portion by soldering can be positioned in the gap.

  In another invention, in addition to the above-described inventions, the planar shape of the drum core and the ring core is circular, and the planar shape of the fitting portion is a part of a circle. When configured in this manner, the drum core and the ring core can be fitted into the fitting portion without worrying about a slight positional shift.

  Furthermore, in addition to the above-described inventions, in another invention, the planar shape of the drum core and the ring core is a polygon, and the planar shape of the fitting portion is a part of the polygon. When configured in this manner, the drum core and the ring core can be automatically positioned when fitted into the fitting portions. Therefore, the manufacturing efficiency of electronic components can be improved.

  According to another aspect of the invention, there is provided an electronic component manufacturing method for manufacturing an electronic component including a drum core having a winding portion around which a winding is wound and a ring core surrounding the winding portion. By drawing the member, a cup body including a bottom portion, a peripheral wall portion standing from the outer peripheral edge portion of the bottom portion, and a fitting portion corresponding to the fitting of the drum core and the ring core surrounded by the bottom portion and the peripheral wall portion is formed. In the cup body, the gap portion penetrates the bottom portion and is formed so as to reach the peripheral wall portion, the fitting step of fitting the drum core and the ring core into the fitting portion, and the gap portion of the peripheral wall portion. A entangled portion for winding the winding is formed by cutting and bending the narrow portion that is approached, and the cup body is formed by the cutting and bending. One end and the other end of the winding are entangled in the terminal forming step in which the first terminal and the second terminal are formed, and the entangled portion of the first terminal and the entangled portion of the second terminal, respectively. A binding step.

  In this case, after the cup body having the bottom, the peripheral wall portion, and the fitting portion is formed in the drawing step, the drum core and the ring core are fitted into the fitting portion in the fitting step. Further, in the terminal formation step, the first terminal and the second terminal are formed from the cup body by cutting and bending the narrow portion. Further, in the binding step, one end and the other end of the winding are respectively bound to the binding portion of the first terminal and the binding portion of the second terminal. In this way, an electronic component is formed.

  Since the electronic component formed as described above is formed by fitting the drum core and the ring core into the fitting portion of the cup body, the outer peripheral side of the drum core and the ring core is strong without causing misalignment. It is pressed into. Therefore, the center of the drum core and the center of the ring core can be matched with high accuracy. That is, it is possible to manufacture an electronic component having a highly accurate coaxiality (concentricity). Moreover, the clearance gap between a drum core and a ring core becomes constant over the perimeter of a drum core and a ring core.

  Further, in such a configuration, since the drum core and the ring core are covered with a large area at the bottom and the peripheral wall of the cup body, the electronic component is in a state of excellent heat dissipation effect and excellent in strength. . Further, due to the presence of the large area bottom portion and the peripheral wall portion, it is possible to perform soldering or the like with a large area, for example, on a mounting portion such as a circuit board. Furthermore, since the drum core and the ring core are positioned only by being fitted into the fitting portion of the cup body, a dedicated jig for positioning the drum core and the ring core becomes unnecessary. Therefore, it is possible to reduce manufacturing costs.

  Furthermore, in another invention, in addition to the above-described invention, in the terminal forming step, a gap is formed between the drum core or ring core and the binding portion by bending the narrow portion. When gaps are formed in this way, the presence of the gaps makes it easier to wind the winding around the entangled portion, and it is possible to locate a fixed portion by soldering in the gap.

  According to another invention, in addition to the above-described inventions, in the fitting step, the drum core and the ring core are fitted into the fitting portion in a state where an adhesive is applied to at least one of the drum core and the ring core. In the case of such a configuration, at least one of the drum core and the ring core is bonded and fixed simply by fitting the drum core and the ring core into the fitting portion. Therefore, it is possible to manufacture an electronic component that is stronger in strength.

  According to the present invention, the center of the drum core and the center of the ring core can be made to coincide with each other with high accuracy, and the electronic component has a highly accurate coaxiality.

  Hereinafter, an embodiment using an electronic component as an inductor according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is an exploded perspective view showing the configuration of the inductor 10, and FIG. 2 is a side sectional view showing the configuration of the inductor 10. FIG. 3 is a plan view showing the configuration of the inductor 10, and FIG. 4 is a rear view showing the configuration of the inductor 10. 5 is a side view showing the configuration of the inductor 10 viewed from the direction indicated by arrow A in FIG. 1, and FIG. 6 is a side view showing the configuration of the inductor 10 viewed from the direction indicated by arrow B in FIG. is there.

  In the following description, “upper” refers to the upper collar portion 21 side viewed from the lower collar portion 23, and “lower” refers to the lower collar portion 23 side viewed from the upper collar portion 21. In the exploded perspective view of the inductor 10 in FIG. 1 described above, the drum core 20, the ring core 30, and the cup body 40 are originally integrated, but are shown in an exploded state for convenience.

  As shown in FIG. 1, the inductor 10 of the present embodiment includes a drum core 20, a ring core 30, a cup body 40, and a winding 50. Among these, the drum core 20 has an upper collar part 21, a column base part 22, and a lower collar part 23.

  The drum core 20 is a disc drum body having L as a center axis in FIGS. 1 and 2, and the planar shape of the upper flange portion 21, the column base portion 22 and the lower flange portion 23 is provided in a circular shape. The drum core 20 is made of a magnetic material such as a nickel-based ferrite core. However, the material of the drum core 20 is not limited to a ferrite core, and may be other magnetic materials such as permalloy. The lower collar portion 23 of the drum core 20 is provided with a larger diameter than the upper collar portion 21. On the outer diameter side of the lower collar portion 23, a placement portion 24 on which the bottom portion 30a of the ring core 30 is placed is provided.

  A winding portion 25 is provided outside the column base portion 22 and between the upper collar portion 21 and the lower collar portion 23. The winding portion 25 is a portion around which the winding 50 is wound. The winding 50 is a conducting wire having a substantially circular cross section. However, the cross section of the winding 50 is not limited to a substantially circular shape, and a ribbon wire (a flat wire) whose cross section is an elongated shape may be used.

  The ring core 30 is an annular member having an insertion hole 31 at the center thereof. The ring core 30 is also composed of a magnetic material such as a nickel-based ferrite core as in the case of the drum core 20 described above, but may be composed of other magnetic materials such as permalloy in addition to the ferrite core. The outer diameter of the ring core 30 is provided to be the same as the outer diameter of the lower flange portion 23 described above. Further, as shown in FIG. 3, the inner diameter of the ring core 30 (the diameter of the insertion hole 31) is slightly larger than the outer diameter of the upper collar part 21 described above, and the inner peripheral wall surface and the upper collar part of the insertion hole 31 of the ring core 30. The outer peripheral edge portion 21 is in a state of facing the gap S.

  The gap S is the same over the entire circumference of the drum core 20 and the ring core 30 by a manufacturing method described later. Moreover, the shape of the side cross section of the ring core 30 is provided in the substantially rectangular shape in this Embodiment. However, the side cross-sectional shape of the ring core 30 is not limited to this, and can be variously changed, for example, provided in a substantially inverted L shape so that the upper side protrudes toward the inner diameter side.

  A recess 32 is provided on the upper end surface of the ring core 30. The hollow portion 32 is a portion for leading the winding 50 wound around the winding portion 25 to the binding portion 43 described later. In the present embodiment, two hollow portions 32 are provided at intervals of 180 degrees corresponding to the number of binding portions 43. However, the number of the recessed portions 32 can be variously changed according to the number of the binding portions 43. In the present embodiment, the side surface shape of the hollow portion 32 is substantially arc-shaped, but the side surface shape of the hollow portion 32 may be substantially rectangular and can be variously modified.

  The cup body 40 is a member composed of two metal cup terminals 40a and 40b. The cup terminal 40a corresponds to the first terminal, and the cup terminal 40b corresponds to the second terminal. However, the cup terminal 40a may correspond to the second terminal, and the cup terminal 40b may correspond to the first terminal.

  The cup terminals 40a and 40b have a bottom portion 41, a peripheral wall portion 42 that is bent substantially perpendicular to the bottom portion 41, and a binding portion 43 around which the winding 50 is wound. In the present embodiment, the bottom portion of the cup terminal 40a and the bottom portion 41 of the cup terminal 40b are opposed to each other with the gap 44 interposed therebetween. The gap 44 is the same from the center of the cup terminals 40a, 40b to a predetermined portion on the outer diameter side, but is provided so as to expand from the predetermined portion toward the outer diameter side.

  The two cup terminals 40a and 40b constitute a fitting portion 45 (see FIG. 1) into which the drum core 20 and the ring core 30 are fitted.

  Further, in this embodiment, the peripheral wall portion 42 protrudes from the bottom portion 41 in a state of being bent substantially vertically by a certain height. Further, the binding portion 43 is provided in a portion of the peripheral wall portion 42 where the gap portion 44 passes through the bottom portion 41 and reaches the peripheral wall portion 42. Therefore, the height position on the upper end side of the binding part 43 is the same as the other part of the peripheral wall part 42, but the height position on the lower end side of the binding part 43 is higher than the other part of the peripheral wall part 42. Highly provided. Thereby, the binding part 43 is a narrow part 46 having a smaller dimension in the height direction (narrow width) than the other part of the peripheral wall part 42.

  The binding portion 43 is formed by being bent with respect to the circumferential direction along which the peripheral wall portion 42 extends. That is, the binding portion 43 is formed by cutting one end of the narrow narrow portion 46 of the peripheral wall portion 42 and bending the narrow portion 46 so that the cut end surfaces formed by the cutting are separated from each other. The For this reason, the base portion of the binding portion 43 has the same radial position as the other portions of the peripheral wall portion 42, but the top portion of the binding portion 43 is more external than the other portions of the peripheral wall portion 42. Projects toward the radial side. Due to the protrusion, a gap 47 is provided between the binding portion 43 and the ring core 30. Due to the presence of the gap 47, the winding 50 can be satisfactorily bound to the binding portion 43.

  In addition, a spacing portion 48 is provided in a portion between the protruding tip portion 43a of the binding portion 43 and the peripheral wall portion 42 facing the tip portion 43a. The spacing portion 48 does not exist in the initial stage of the manufacturing method described later, but is a portion provided by cutting and bending (cutting up) the narrow portion 46 in order to form the subsequent binding portion 43. In addition, the length dimension of this space | interval part 48 is provided in the magnitude | size which does not produce a short circuit between the front-end | tip part 43a and the surrounding wall part 42 which opposes this front-end | tip part 43a.

  A method for manufacturing the inductor 10 having the above configuration will be described below.

  First, the pre-cut cup body 60 (see FIG. 7) in which the two cup terminals 40a and 40b are integrated is manufactured. In this case, for example, the disk-shaped flat plate member in which the gap portion 44 is previously formed is pressed (drawing) to form a fitting portion 45 that is a circular depression (corresponding to the drawing step). Further, the winding 50 is wound around the winding portion 25 of the drum core 20 in a state separate from the drawing process. Then, the ring core 30 is mounted on the mounting portion 24 of the drum core 20 in a state where the winding 50 is wound. Thereafter, an adhesive is applied to the surface portions (rear surface side and / or outer peripheral surface side) of the drum core 20 and the ring core 30, and is fitted into the fitting portion 45 (corresponding to the fitting step).

  When such fitting is performed, the drum core 20 and the ring core 30 are positioned due to the presence of the bottom 41 and the peripheral wall 42. That is, the center of the drum core 20 and the center of the ring core 30 are in a state of being accurately aligned with the center axis L (see FIGS. 1 and 2). As a result, as shown in FIG. 3, a constant gap S exists between the central wall surface of the insertion hole 31 of the ring core 30 and the outer peripheral edge portion of the upper collar portion 21 of the drum core 20 over the entire circumference. It becomes a state to do.

  In the state where the drum core 20 and the ring core 30 are fitted into the insertion hole 31 described above, the binding portion 43 is not yet formed, and the narrow portion 46 is present. In addition, when the drum core 20 and the ring core 30 are fitted into the fitting portion 45, one end side and the other end side of the winding 50 are brought into contact with the hollow portion 32.

  After the above-mentioned adhesive is dried, one end side of the narrow portion 46 is cut by, for example, a laser beam emitted from a laser processing apparatus. Here, it is preferable that the base portion of the narrow portion 46 with respect to the peripheral wall portion 42 is cut by the above-described laser configuration. After this cutting, the narrow portion 46 is bent so that the narrow portion 46 has a generally U shape. In this way, the cup body is divided into two to form the cup terminals 40a and 40b, and the binding portion 43 that can wind the winding 50 is formed (corresponding to the terminal forming step). ). In addition, a gap 47 is formed between the binding portion 43 and the ring core 30 by bending the narrow portion 46. Further, by this bending, a space portion 48 exists between the tip portion 43a of the binding portion 43 and the peripheral wall portion 42 facing the tip portion 43a.

  Subsequently, one end side or the other end side of the winding 50 is respectively wound on the formed binding portion 43 (corresponding to the binding step). After this binding is finished, soldering is performed on the winding portion of the winding 50 of the binding portion 43. In this case, the fixed portion formed by soldering enters the gap 47.

  As described above, the inductor 10 is formed. Thereafter, the work of mounting the inductor 10 on a circuit board or the like can be performed. Here, when the inductor 10 is mounted on the circuit board, the bottom 41 comes into contact with the circuit board in a large area. Therefore, it is possible to achieve a strong mounting state by soldering or the like.

  According to such a configuration, since the inductor 10 is formed by fitting the drum core 20 and the ring core 30 into the fitting portion 45 of the cup body 40, the positioning of the outer peripheral side of the drum core 20 and the ring core 30 is ensured. The Here, in the fitted state of the drum core 20 and the ring core 30, the lower collar portion 23 comes into contact with the bottom portion 41, so that the peripheral wall portion 42 standing from the bottom portion 41 is less likely to be deformed in a state of drawing an arc. Therefore, the center of the drum core 20 and the center of the ring core 30 can be matched with high accuracy. That is, the inductor 10 having a highly accurate coaxiality (concentricity) can be manufactured.

  In addition, the gap S existing between the inner peripheral wall surface of the insertion hole 31 of the ring core 30 and the outer peripheral edge portion of the upper collar portion 21 is constant over the entire circumference of the drum core 20 and the ring core 30. Therefore, the inductor 10 can form a uniform magnetic path over the entire circumference.

  The lower surface and side surfaces of the drum core 20 and the ring core 30 are widely covered with metal cup terminals 40a and 40b. Therefore, the drum core 20 and the ring core 30 and the cup terminals 40a and 40b come into contact with each other in a large area, and the heat dissipation effect is excellent. Moreover, the lower surface side and the side surface side of the drum core 20 and the ring core 30 are widely covered by the cup terminals 40a and 40b, and the covered portions can be bonded, so that the inductor 10 is excellent in strength. Further, the presence of the gap 47 makes it easy to wind the winding 50 around the binding portion 43, and allows a soldered fixed portion to enter the gap 47.

  Furthermore, the drum core 20 and the ring core 30 are positioned only by being fitted into the fitting portion 45 of the cup body 40. For this reason, a dedicated jig for positioning the drum core 20 and the ring core 30 becomes unnecessary. Further, the positioning accuracy is good without using such an adhesive jig. Therefore, the manufacturing cost can be reduced by the amount that the bonding jig is unnecessary.

  Further, by using the cup terminals 40a and 40b, it is possible to perform soldering or the like with a large area on a mounting portion such as a circuit board. Therefore, the inductor 10 can improve vibration resistance in the mounted state.

  Furthermore, the lower collar portion 23 is provided with a larger diameter than the upper collar portion 21, and the lower collar portion 23 is provided with a placement portion 24 on which the bottom portion 30 a of the ring core 30 is placed. In this case, since the ring core 30 is placed on the placement portion 24, if the ring core 30 is fitted from above, the drum core 20 is positioned between the ring core 30 and the center of the drum core 20 and the ring core. The centers of 30 can be matched with high accuracy. Moreover, the winding part 25 is covered with the drum core 20 and the ring core 30 by this fitting, and a uniform magnetic path can be formed.

  In the present embodiment, the drum core 20 and the ring core 30 have a circular planar shape, and the fitting portion 45 has a substantially circular planar shape. For this reason, when the drum core 20 and the ring core 30 are fitted into the fitting portion 45, the drum core 20 and the ring core 30 can be fitted without worrying about a slight displacement in the circumferential direction.

  Further, the ring core 30 is formed with a recess 32. Therefore, the winding 50 wound around the winding portion 25 can be led out from the insertion hole 31 side toward the outer diameter side through the recess portion 32. Thereby, even if another member is attached in a state of covering the recess 32, the winding 50 does not get in the way. Further, even when other members are attached, it is possible to prevent problems such as breakage due to the winding 50 being crushed or the like.

  Further, when the drum core 20 and the ring core 30 are fitted into the fitting portion 45, the drum core 20 and the ring core 30 are fitted in a state where an adhesive is applied. Therefore, if the drum core 20 and the ring core 30 are fitted into the fitting portion 45 and pushed in, and then dried, the drum core 20 and the ring core 30 are firmly bonded and fixed to the cup terminals 40a and 40b. As a result, the inductor 10 that is stronger in strength can be manufactured.

  Although one embodiment of the present invention has been described above, the present invention can be variously modified in addition to this. This will be described below.

  In the above-described embodiment, the case where the cup body 40 that covers the drum core 20 and the ring core 30 from the lower collar portion 23 side is described. However, the cup body is not limited to the configuration that covers the drum core 20 and the ring core 30 from the lower flange portion 23 side, and may be configured to cover the drum core 20 and the ring core 30 from the upper flange portion 21 side.

  In the above-described embodiment, the drum core 20, the ring core 30, and the cup body 40 have a substantially circular planar shape. However, the drum core 20, the ring core 30, and the cup body 40 may have polygonal shapes such as hexagons and octagons, for example. In the case of such a polygonal configuration, positioning and insertion are facilitated when the drum core 20 and the ring core 30 are fitted into the fitting portion 45. As a result, the manufacturing efficiency of the inductor can be improved.

  Moreover, in the above-mentioned embodiment, the case where the cup body 40 is comprised from the two cup terminals 40a and 40b is demonstrated. However, the number of cup terminals is not limited to two, and a plurality of cup terminals, such as four, may be provided. In addition, when the cup body 40 is comprised, for example from four cup terminals, the cup terminal 40a corresponding to the above-mentioned 1st terminal is comprised from two small cup terminals, and the cup corresponding to the above-mentioned 2nd terminal. The terminal 40b is similarly composed of two small cup terminals.

  Furthermore, in the above-described embodiment, the width dimension of the gap 44 is constant from the center of the cup body 40 to a predetermined portion on the outer diameter side. However, the width of the gap 44 may be increased, for example, while increasing the center side of the cup body 40 and decreasing toward the outer diameter side. In this way, it is possible to prevent more than a predetermined amount of charges from being stored in the edge portions of the cup terminals 40a and 40b that face each other with the gap 44 interposed therebetween.

  In the above-described embodiment, for example, the drum core 20 that does not include the upper collar portion 21 may be used. In this case, a bobbin for winding the winding 50 is inserted into the column base 22, and instead of the ring core 30, the cup-shaped core member is placed upside down on the placement unit 24, and then the drum core 20 and the core member can be fitted into the fitting portion 45. Also in this case, similarly to the above-described embodiment, the center of the drum core 20 and the center of the core member can be matched with high accuracy.

  In the above-described embodiment, the case where the inductor 10 is used as an electronic component has been described. However, the electronic component is not limited to the inductor 10. Examples of other electronic components include a transformer and a filter, and the present invention may be applied to these.

  The electronic component and the electronic component manufacturing method of the present invention can be used in the field of electrical equipment.

It is a disassembled perspective view which shows the structure of the inductor which concerns on one embodiment of this invention. It is a sectional side view which shows the structure of the inductor of FIG. It is a top view which shows the structure of the inductor of FIG. It is a rear view which shows the structure of the inductor of FIG. FIG. 3 is a side view of the inductor as viewed from the direction of arrow A in FIG. 2 while showing the configuration of the inductor in FIG. 1. FIG. 3 is a side view of the inductor as viewed from the direction of arrow B in FIG. 2 while showing the configuration of the inductor in FIG. 1. It is a perspective view which shows the structure of the cup body before a cutting | disconnection before a cup body is formed in connection with the structure of the inductor of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Inductor 20 ... Drum core 21 ... Upper collar part 22 ... Column base part 23 ... Lower collar part 24 ... Mounting part 25 ... Winding part 30 ... Ring core 31 ... Insertion hole 32 ... Depression part 40 ... Cup body 40a ... Cup terminal (Corresponding to the first terminal)
40b ... Cup terminal (corresponding to the second terminal)
DESCRIPTION OF SYMBOLS 41 ... Bottom part 42 ... Circumferential wall part 43 ... Tying part 44 ... Gap part 45 ... Insertion part 46 ... Narrow part 47 ... Gap 48 ... Space | interval part 50 ... Winding 60 ... Cup body before cutting

Claims (8)

A drum core having an upper collar part and a lower collar part, having a winding part surrounded by the upper collar part and the lower collar part and having a winding wound thereon;
A ring core having an insertion hole through which the drum core is inserted, and an upper or lower flange portion of the drum core and an inner wall surface of the insertion hole facing each other in the insertion state of the drum core into the insertion hole;
A first terminal having a bottom portion and a peripheral wall portion, having a binding portion that is wound around the winding and is narrower than the peripheral wall portion and continuous with the peripheral wall portion;
And having a bottom portion and a peripheral wall portion, and having a binding portion that is wound around the winding and is narrower than the peripheral wall portion and continuous with the peripheral wall portion, via the first terminal and the gap portion A second terminal disposed oppositely;
Comprising
With the opposing arrangement, a fitting portion for fitting the drum core and the ring core is formed,
The binding portion of the first terminal and the peripheral wall portion of the second terminal, and the binding portion of the second terminal and the peripheral wall portion of the first terminal are separated and separated by bending. Electronic parts characterized by A drum core having an upper collar part and a lower collar part, having a winding part surrounded by the upper collar part and the lower collar part and having a winding wound thereon;
A ring core having an insertion hole through which the drum core is inserted, and an upper or lower flange portion of the drum core and an inner wall surface of the insertion hole facing each other in the insertion state of the drum core into the insertion hole;
The bottom portion and a peripheral wall portion standing from the outer peripheral edge portion of the bottom portion, and the bottom portion and the peripheral wall portion form a fitting portion into which the drum core and the ring core are fitted, and penetrate the bottom portion and are formed in the peripheral wall portion. A cup body provided with a narrow gap portion that is narrower than the peripheral wall portion due to the presence of this gap portion;
Comprising
A binding portion for binding the winding is formed by cutting and bending the narrow portion, and a first terminal and a second terminal separated from the cup body are formed by the cutting and bending. Electronic parts characterized by being made.   The electronic component according to claim 1, wherein a gap by the bending is provided between the ring core or the drum core and the binding portion.   4. The electronic component according to claim 1, wherein the planar shape of the drum core and the ring core is a circle, and the planar shape of the fitting portion is a part of a circle. 5.   4. The electronic component according to claim 1, wherein a planar shape of the drum core and the ring core is a polygon, and a planar shape of the fitting portion is a part of the polygon. 5. . In an electronic component manufacturing method for manufacturing an electronic component including a drum core having a winding portion around which a winding is wound and a ring core surrounding the winding portion,
Corresponding to fitting of the drum core and the ring core surrounded by the bottom part and the peripheral wall part standing from the outer peripheral edge part of the bottom part, and the bottom part and the peripheral wall part by drawing the plate-like member having the gap part A squeezing step in which a cup body having a fitting portion to be formed is formed, and the gap portion penetrates the bottom portion and reaches the peripheral wall portion in the cup body;
A fitting step of fitting the drum core and the ring core into the fitting portion;
Of the peripheral wall portion, a binding portion for binding the winding is formed by cutting and bending a narrow portion where the gap portion is approached, and the cutting body and the bending portion are connected to the first terminal from the cup body. A terminal forming step in which a second terminal is formed;
A binding step of binding one end and the other end of the winding to the binding portion of the first terminal and the binding portion of the second terminal;
The manufacturing method of the electronic component characterized by comprising.   The method of manufacturing an electronic component according to claim 6, wherein in the terminal forming step, a gap is formed between the drum core or the ring core and the binding portion by the bending of the narrow portion. .   8. The electronic component according to claim 6, wherein in the fitting step, the drum core and the ring core are fitted into the fitting portion in a state where an adhesive is applied to at least one of the drum core and the ring core. 9. Production method.

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