JP5964598B2 - Reactor and manufacturing method thereof - Google Patents

Description

  The present invention relates to a resin-molded reactor in which two U-shaped cores are combined and a coil is wound around the U-shaped core, and a manufacturing method thereof.

When manufacturing a reactor, the following techniques have been conventionally proposed.
(1) Assemble the core and coil and impregnate it with resin.
(2) The core is molded in the resin first, or the coil is molded in the resin first, and both are assembled (Patent Document 1).
(3) Assembling a coil and an I-shaped intermediate core previously molded and a U-shaped end core (Patent Document 2).
(4) Mold the core and coil all at once.

Further, as the heat dissipation technology from the reactor manufactured as described above, the following has been proposed.
(1) A heat path member from the core to the cooling surface is provided (Patent Document 3).
(2) A heat transfer sheet is provided on the lower surface of the coil (Patent Document 4).
(3) A heat sink made of an insulating material is disposed on the coil contact surface on the cooling surface side (Patent Document 5).
(4) A heat dissipation member is disposed on the outer peripheral surface of the core (Patent Document 6).

JP 2009-218293 A Japanese Patent No. 4535300 Japanese Patent No. 4506668 Japanese Patent No. 4645417 JP 2009-194198 A JP 2011-66242 A

  However, the prior art as described above requires a fixing member for assembling the core and the coil. In particular, most of the prior art employs a resin sealing structure for a metal heat dissipation case as a countermeasure for fixing the core and the coil and for heat dissipation, so that the assembly work of the core and the coil is troublesome.

  Moreover, in the reactor that molds the core and the coil all at once, the above-mentioned problems at the time of assembling the coil and the core can be solved, but it is necessary to set the coil and the core in the mold at the time of molding. Therefore, a plurality of auxiliary members are required for setting and positioning of the core and the coil, and the configuration of the mold is complicated. As a result, there remains a problem that the assembly process and the molding process cannot be simplified.

  The present invention solves the above-described problems of the prior art, and an object of the present invention is to provide a reactor that can reduce the number of parts in the assembly process and improve workability during assembly, and a method for manufacturing the same. is there.

  In order to achieve the above object, a reactor and a manufacturing method thereof according to the present invention include a pair of U-shaped cores and a resin-molded reactor in which a coil is wound around the U-shaped core. A core-coil member formed by arranging a coil on the outer periphery of a straight portion and integrally molding the resin with a resin, and a core member formed by molding the other U-shaped core with a resin, are a U-shaped core of the core member Is inserted inside the coil of the core-coil member, and is assembled so that the U-shaped core of the core member and the end surface of the U-shaped core of the core-coil member are opposed to each other through the gap portion.

  In this case, a spacer is inserted between the U-shaped core of the core-coil member and the end surface of the U-shaped core of the core member, or a space gap is formed. In the case of the configuration in which the spacer is inserted, it is preferable that a guide for inserting the spacer is formed on the inner surface of the coil of the core-coil member with a mold resin.

  When combining the core member and the core-coil member, an I-type core coated with resin other than the end face in the opening formed in the core-coil member or an I-type core not coated with resin and, if necessary, a spacer Once inserted, the core member can then be combined with the core-coil member.

  The core member and the core-coil member can be resin-molded together with a metal fixing member for fixing the reactor to the mounting surface. By molding this fixing member in the resin, a heat radiation path from the inside of the reactor can be secured. Further, a spring portion that absorbs vibration and thermal expansion can be provided in a part of the fixing member.

  When the core-coil member is resin-molded, it is also possible to ensure heat dissipation from the coil to the mounting surface by exposing a portion facing the mounting surface of the coil.

  In the present invention, since the coil and the core, or only the core, are resin-molded and then the molded products are assembled, the number of parts to be positioned in the mold during molding is reduced. As a result, the core and the coil can be accurately positioned with a simple mold. Further, the core-coil member and the core member can be simply assembled by inserting the core molded in the core member inside the coil molded in the core-coil member. Thus, according to the present invention, it is possible to provide a reactor in which cores can be assembled with high accuracy and the number of assembling steps is reduced, and a manufacturing method thereof.

It is a disassembled perspective view which shows the reactor of embodiment of this invention. It is a perspective view of the assembly state of the reactor of FIG. It is a top view of the reactor of FIG. It is a front view of the reactor of FIG. It is a right view of the reactor of FIG. It is sectional drawing of the AA line of FIG. It is sectional drawing of the BB line of FIG. It is a disassembled perspective view which shows the assembly method of the reactor of FIG. It is sectional drawing of the reactor of FIG. It is a perspective view which shows the core-coil member in the reactor of FIG. It is a perspective view which shows the core member in the reactor of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1. Overall Configuration of Embodiment The reactor of the present embodiment is configured by assembling a core-coil member 10 and a core member 30 as a pair, as shown in FIG. The assembled reactor is fixed to the surface of an aluminum base plate 50 having excellent heat dissipation, for example.

  Since the reactor of this embodiment is not necessarily fixed only to the base plate 50 as shown in the figure, it is also fixed to the surface of another member. Therefore, in this specification, the installation location of the reactor is designated as the installation surface 51 of the reactor. Collectively. In the present specification, the U-shaped core provided on the core-coil member 10 side is the first U-shaped core, the fixing member is the first fixing member, the U-shaped core provided on the core member 30 is the second U-shaped core, and the fixing member is the first fixing member. Although described as 2 fixing members, these 1st and 2nd are the description for the convenience of description, and do not limit each member provided in a core-coil member or a core member.

2. Core-coil member 10
The core-coil member 10 includes a coil 12 wound around the outer periphery of a straight portion (also referred to as a leg portion of the core) on both sides of the first U-shaped core 11 and the core-coil member 10 fixed to the mounting surface 51. Therefore, the first metal fixing member 13 is made by resin molding.

  In this case, since the linear portion of the second U-shaped core 31 of the core member 30 is inserted into the coil 12, the length of the linear portion of the first U-shaped core 11 molded with the coil 12 is longer. As shown in the sectional view of FIG. 9, an opening 14 for inserting the second U-shaped core 31 of the core member 30 is formed inside the coil 12. In the present embodiment, since the coil 12 is wound in a square shape and the cross section of the first U-type core 11 is a square shape, the opening 14 is also a square shape.

  As shown in the sectional views of FIGS. 6 and 9 or the perspective view of FIG. 10, the entire surface of the first U-shaped core 11 and the coil 12 constituting the core-coil member 10 includes the inner surface of the opening 14. Is also covered with the mold resin 15. However, the portion facing the mounting surface 51 of the coil 12 is exposed without being covered with the resin 15. That is, when the reactor is fixed to the mounting surface 51, the exposed portion of the coil 12 is disposed with a distance to suppress partial discharge without interposing the mounting surface 51 and the mold resin 15.

  As shown in FIGS. 8 and 9, the flat portion of the inner surface of the coil 12 wound in a square and the end surfaces of the straight portions on both sides of the first U-type core 11 are also exposed so as not to be covered with the resin 15. It has become. The ends of the coil 12 penetrate the resin 15 and protrude from the surface of the core-coil member 10, and are connected to each other by a conductive bar 19.

  A guide 16 of the spacer 20 is formed by a resin 15 covering the inner surface of the coil 12 at a corner portion of the inner surface of the opening 14 having a rectangular shape. The guide 16 has a curved surface whose inner peripheral surface is formed in accordance with the outer peripheral shape of the corner portion of the spacer 20, and is guided by the curved surface so that the spacer 20 does not contact the surface of the coil 12. It moves smoothly to the end surface of the first U-shaped core 11 exposed at the bottom of the portion 14.

  Between the outer surface of the linear part of the both sides in the 1st U-type core 11, and the inner surface of the coil 12 which opposes this, it encloses the outer surface of the core 11, and in other words, covers the inner surface of the coil 12 Is provided. The resin layer is positioned so that the outer surface of the first U-shaped core 11 and the inner surface of the coil 12 do not contact each other.

  In this resin layer, a groove 15a is formed along the insertion direction of the coil 12 (the axial direction of the coil 12). That is, since this groove 15a is a space portion formed inside the resin layer, the mold of the core-coil member 10 has a protrusion along the axial direction of the coil 12 in order to form this groove 15a. It is necessary to form the part. The convex portion formed in the mold functions as a positioning member for the first U-shaped core 11 and the coil 12 when the first U-shaped core 11 and the coil 12 are mounted in the mold.

  The guide 16 of the spacer 20 is formed from the edge of the opening 14 to the end face portion of the first U-shaped core 11 at the bottom of the opening 14. In this case, the guide 16 is formed only at the four corners of the opening 14, and the central part of the four sides of the opening 14 is a space where no resin layer is present. That is, similar to the resin layer on the outer periphery of the first U-type core 11, the mold is provided with convex portions for forming spaces between the guides 16 at the four corners. Since this convex portion is formed up to the end face portion of the first U-shaped core 11 as with the guide 16 of the spacer 20, when the first U-shaped core 11 is mounted in the mold, the first U-shaped core The end face of 11 comes into contact with the end face of the convex portion of the mold. As a result, when the first U-shaped core 11 is mounted in the mold, the first U-shaped core 11 can be accurately positioned in the coil axis direction.

  As described above, the core-coil member 10 is provided with the first fixing member 13 for fixing the reactor to the mounting surface 51 after the assembly of the reactor. The first fixing member 13 is composed of a strip-shaped metal plate, and a central portion thereof is molded in the resin 15 together with the coil 12 and the first U-shaped core 11. That is, the central portion of the first fixing member 13 has an L-shaped cross section inside the resin 15 as shown in the cross-sectional view of FIG. 7, and avoids the first U-shaped core 11 in the vicinity of the end of the coil 12. Molded. Further, both end portions of the first fixing member 13 are bent at a right angle so that the tip of the protruding portion from the resin 15 is parallel to the mounting surface 51, and a screw insertion hole 17 is provided in the bent portion.

  A mounting hole 18 of the thermistor S is formed in the middle portion of the two coils 12 in the mold resin 15 constituting the core-coil member 10 in a direction along the axial direction of the coil 12. Since the mounting hole 18 is formed in the die-cutting direction, a rod-shaped protrusion along the axial direction of the coil 12 is provided on the mold, and is produced when the core-coil member 10 is molded. .

3. Core member 30
As shown in FIGS. 1 and 9, the core member 30 is manufactured by resin-molding a second U-shaped core 31 and a second fixing member 32. In this case, both end surfaces of the second U-shaped core 31 are not covered with the resin 36 and the core is exposed. In the illustrated embodiment, a portion where the core is exposed is also formed in a part of the curved portion of the second U-shaped core 31 (the yoke portion of the core).

  The two linear portions of the resin-molded second U-shaped core 31 have dimensions and shapes that are attached to the openings 14 in the coil 12 formed in the core-coil member 10. In this case, as shown in FIG. 8 and FIG. 11, a protrusion 33 extending in the axial direction of the coil 12 is formed on the surface of the straight portion of the second U-shaped core 31, and the protrusion 33 is the core-coil member 10. Are inserted between the guides 16 at the four corners on the inner surface of the opening 14. In the present embodiment, as shown in the cross-sectional view of FIG. 6, the protrusion 33 is formed on the upper surface of the straight portion (the surface opposite to the mounting surface 51) and the surface located outside the second U-shaped core 31. However, it is not necessarily limited to this position.

  The central portion of the second fixing member 32 resin-molded on the core member 30 is disposed in the resin 36 below the core member 30, that is, below the second U-shaped core 31, as shown in FIGS. 7 and 11. Yes. Both ends of the second fixing member 32 protrude from the resin 36 of the core member 30, and spring portions 34 bent in a C shape are provided at the protruding portion. The tip of the spring portion 34 is formed in parallel with the mounting surface 51, and a screw insertion hole 35 for screwing the fixing member 32 to the mounting surface 51, that is, the base plate 50 is provided at that portion.

  The portion of the second fixing member 32 disposed in the resin 36 is in contact with the surface of the second U-shaped core 31 as shown in FIGS. With this structure, heat generated in the second U-shaped core 36 is transmitted to the second fixing member 32 through this contact portion, and is released to the outside of the resin 36 via the second fixing member 32.

4). Manufacturing Method The reactor according to the present embodiment including the core-coil member 10 and the core member 30 as described above is manufactured as follows.

  The core-coil member 10 and the core member 30 are manufactured separately. In this case, with respect to the core-coil member 10, the coil 12 is first set in a mold whose upper surface is open, and then the first U-type core 11 and the first fixing member 13 are set. In this case, as described above, the mold is provided with a protrusion for forming the inner space of the core-coil member 10, so that the first U-type core 11 and the coil 12 can be formed using this protrusion. Perform positioning. Since the first U-shaped core 11 and the coil 12 are regulated by the protrusion of the mold, the positioning accuracy of both is increased.

  In this state, the mold 12 is filled with the mold resin 15, thereby integrating the coil 12, the first U-type core 11, and the first fixing member 13. In this case, the end portion 12a of the coil 12 and the end portion of the first fixing member 13 are arranged in close contact with the inner surface of the space formed in the mold, so that these end portions of the core-coil member 10 molded are formed. Project from the surface.

  Similarly, since a rod-shaped protrusion is provided along the axial direction of the coil 12 at the center of the mold, the protruding portion is not filled with the resin 15, and the core molded from within the mold. When the coil member 10 is taken out, a thermistor mounting hole 18 is formed in the center of the core-coil member 10 as shown in FIG. After molding the core-coil member 10, as shown in FIGS. 7 and 8, the thermistor S is inserted into the mounting hole 18 and fixed with an adhesive or the like. At this time, the thermistor S may be pressed into the mounting hole 18 without using an adhesive.

  On the other hand, the core member 30 is similarly molded by setting the second U-shaped core 31 and the second fixing member 32 in the mold and then filling the mold with a resin 36. The molding of the core-coil member 10 and the molding of the core member 30 may be performed simultaneously in one mold or may be performed at different timings using different molds.

  The reactor is assembled by inserting the straight portion of the second U-shaped core 31 of the core member 30 thus formed inside the core of the core-coil member 10. In this case, as shown in FIG. 1 and FIG. 9, first, the end face of the first U-shaped core exposed at the bottom of the two openings 14 of the core-coil member 10 and the second U-shaped core 31 of the core member 30. An adhesive 60 is applied to the end face of the film.

  Thereafter, the spacer 20 is inserted into the opening 14 of the core-coil member 10, and then the straight portion of the second U-shaped core 31 of the core member 30 is inserted into the opening 14. At this time, the spacer 20 is smoothly inserted to the back of the opening 14 by the guides 16 formed at the four corners of the opening 14. At this time, if there is no guide 16 and the inner surface of the coil 12 is exposed, the edge of the spacer 20 is caught by the conducting wire of the coil 12. In this embodiment, the inner surface of the coil 12 is smoothed by the guide 16. Therefore, the spacer 20 can be inserted smoothly.

  After the spacer 20 is inserted, the straight portion of the second U-shaped core 31 of the core member 30 is inserted into the opening 14 of the core-coil member 10 as shown in FIGS. As a result, the core-coil member 10 and the core member 30 are integrated through the adhesive 60 and the spacer 20.

  At this time, the lead wire of the thermistor S is pulled out of the reactor from the joint surface between the core-coil member 10 and the core member 30. Further, the end 12a of the coil 12 protruding from the resin 15 of the core-coil member 10 is electrically connected by a conductive bar 19 as shown in FIGS.

  In order to fix the assembled reactor to the mounting surface 51 in this way, as shown in FIG. 1 and FIG. 2, the reactor is arranged on the base plate 50 having the mounting surface 51, and the fixing members 13 and 32 are fixed. The set screw 52 is inserted into the provided screw insertion holes 17 and 35, and the tip of the set screw 52 is fastened to the screw hole 53 of the base plate 50.

At this time, since the coil 12 is exposed at the portion facing the mounting surface 51 of the coil 12 molded on the core-coil member 10, a heat conductive adhesive 61 is used as shown in the cross-sectional view of FIG. Then, the exposed portion of the coil 12 and the mounting surface 51 are fixed. In that case, by providing the mounting surface 51 with an insulating sheet 62 or an insulating paint in which a heat conductive filler is blended in advance, heat of the coil 12 is transferred to the base plate 50 while ensuring insulation between the coil 12 and the mounting surface 51. It will be possible to escape.
5. Effects of the embodiment The reactor of the present embodiment has the following effects.

(1) The core-coil member 10 and the core member 30 are integrally formed with fixing members 13 and 32 for fixing the core-coil member 10 and the core member 30 to the mounting surface 51, respectively. Therefore, it is not necessary to provide the fixing members 13 and 32 separately, and the reactor can be easily fixed to the mounting surface 51.

(2) The fixing member 33 for fixing the reactor to the mounting surface 51 is made of a metal plate, and a spring portion 34 formed by bending the metal plate is formed at a part thereof. Therefore, vibrations and thermal expansion generated in the reactor gap portion can be absorbed by the spring portion 34.

(3) Since the portion of the second fixing member 32 disposed in the resin 36 is brought into contact with the surface of the second U-type core 31, the heat generated in the second U-type core 36 is second from the contact portion. Since it is discharged to the outside of the resin 36 via the fixing member 32, the heat dissipation is excellent.

(4) The coil 12 of the core-coil member 10 has the surface of the coil 12 exposed from the mold part at one or more places including at least the part where the mounting surface 51 faces. For this reason, when the mold and the coil 12 are positioned, the exposed portion is brought into contact with the mold, so that both can be positioned accurately during molding. In addition, since the coil 12 and the cores 11 and 31 are molded by the resins 15 and 36, the heat dissipation performance is deteriorated. However, when the exposed portion comes into contact with the mounting surface 51, the heat dissipation performance is also improved.

(5) A hole 18 for attaching the thermistor in the coil axis direction is provided in the mold part of the core-coil member 10. That is, the reactor may be required to be attached with a thermistor S that measures its temperature. In this embodiment, since the core-coil member 10 is taken out from the mold along the axial direction of the coil 12 after molding, the core-coil is provided by providing the hole 18 for attaching the thermistor in the axial direction of the coil 12. The thermistor mounting hole 18 can be molded simultaneously with the molding of the member 10. For this reason, the hole 18 for attaching the thermistor can be provided at a substantially central portion between the coils 12, which is normally difficult to arrange, and the accuracy of temperature detection is improved. In addition, the hole 18 can be easily created as compared with the case where a hole is newly provided after the reactor is completed.

(6) A guide 16 for inserting the gap spacer 20 is provided at a portion where the core of the core-coil member 10 of the mold is bonded to the gap. Therefore, the positioning of the gap spacer 20 in the mold becomes accurate. In particular, since the guide 16 is provided in the axial direction of the coil 12, that is, in the die-cutting direction, it does not get in the way when the core-coil member 10 is die-cut. In particular, in this embodiment, since the resin layer is formed on the inner surface of the coil 12 and the coil 12 is not exposed, when the spacer 20 is used by providing the guide 16 of the spacer 20 on the resin layer portion of the inner surface of the coil 12. The insertion operation into the coil 12 can be performed accurately and smoothly.

(7) A gap 15a for positioning the core and the coil 12 at the time of molding is provided in the gap between the coil 12 portion having a substantially cylindrical shape of the core-coil member 10 and the core portion molded therein. That is, since the groove 15a is formed by a protrusion provided in the mold, when the core is set in the mold, the position of the core and the coil is regulated by the protrusion portion, whereby the mold The core and the coil 12 are not in contact with each other, and the both can be positioned accurately.

(8) The reactor in which the core-coil member 10 and the core member 30 are assembled is fixed to the attachment surface 51 on the lower surface of the core-coil member 10 with an adhesive. In this case, when the reactor is assembled to the mounting surface 51 with a fixing member in order to secure the adhesive layer, a distance corresponding to the thickness of the adhesive applied between the coil 12 and the mounting surface 51 is secured. . If it does in this way, it becomes possible to ensure the insulation distance of the coil 12 surface exposed to the lower surface of the core-coil member 10, and the attachment surface 51, and generation | occurrence | production of the partial discharge between the coil 12 and the attachment surface 51 is attained. Can be prevented.

6). Other Embodiments The present invention is not limited to the above-described embodiments, and includes other embodiments as described below.

(1) As a core to be used for the core-coil member 10 or the core member 30, a U-type + I-type core obtained by previously bonding a U-type core and an I-type core through a gap can be used. In that case, even with a reactor of the type having an I-type core, the U-type core and the I-type core can be joined and positioned accurately and easily.

(2) When the core member 30 and the core-coil member 10 are combined, an I-type core that is covered with a resin other than the end face in the opening 15 formed in the core-coil member 10 or an I that is not covered with a resin It is also possible to insert the mold core and then combine the core member 30 with the core-coil member 10. In this case, a guide for the I-type core may be provided on the inner periphery of the opening 15 so that the single I-type core is smoothly inserted into the opening 15.

(3) A projecting piece provided on a fixing member 32 in which a groove 15a formed between the outer surface of the linear portion on both sides of the first U-type core 11 and the inner surface of the coil 12 facing the first U-shaped core 11 is molded on the core member 30. It can be set as an insertion part. That is, a part of the fixing member on the core member 30 side is protruded into the opening 15 of the core-coil member 10 to form a tongue piece, and the tongue piece is arranged in the groove 15a, so that the heat inside the reactor is increased. Can be released to the fixing member 32 on the core member 30 side through the tongue piece.

(4) When the core-coil member 10 and the core member 30 are assembled, a portion surrounded by a U-shape that is parallel to the gap surface of the core member 30 and the end surface of the coil 12 of the core-coil member 10 are bonded. By doing so, a gap part can be ensured as space. In that case, there is an advantage that the gap portion can be formed without using the spacer 20. In particular, since the core-coil member 10 and the core member 30 can be formed with high precision by a mold, the dimensional accuracy of the gap portion is increased, and it is not necessary to provide the spacer 20 in order to ensure the dimensions. When the spacer 20 is not used, an adhesive is applied to the bonding surfaces of the core-coil member 10 and the resin 15 and 36 of the core member 30 to fix them.

(5) The spring portion 34 provided on the fixing member 32 of the core member 30 is provided on the fixing member 13 of the core-coil member 10 or on the fixing members 13 and 32 of both the core-coil member 10 and the core member 30. You can also.

(6) The present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

DESCRIPTION OF SYMBOLS 10 ... Core-coil member 11 ... 1st U-type core 12 ... Coil 12a ... End part 13 of coil ... 1st fixing member 14 ... Opening part 15 ... Resin 15a ... Groove 16 ... Guide 17 ... Hole 18 for screw insertion ... Thermistor Mounting hole 19 ... Conductive bar 20 ... Spacer 30 ... Core member 31 ... Second U-shaped core 32 ... Second fixing member 33 ... Projection 34 ... Spring portion 35 ... Hole 36 ... Resin 50 ... Base plate 51 ... Mounting surface 52 ... Set screw 53 ... Screw holes 60, 61 ... Adhesive 62 ... Insulation sheet S ... Thermistor

Claims (9)

In a resin-molded reactor formed by winding a coil around a pair of U-shaped cores,
A coil member, - arranged one of the U-shaped core and the coil on the outer periphery of the straight portion of the core, the core comprising these are molded by integrally resin
Comprising a core member formed by the other of said U-shaped core is molded with resin,
U-shaped core is the core of the core member - is inserted inside the coil of the coil member,
Wherein a U-shaped core of the core member core - the end faces of the U-type core of the coil member is opposed through the gap portion,
A guide for inserting a spacer is formed of mold resin on the inner surface of the coil of the core-coil member,
A reactor in which a spacer is inserted between the U-shaped core of the core-coil member and an end surface of the U-shaped core of the core member in order to secure the gap portion . The core - in the opening formed in the coil member, a single I-shaped core is inserted, the core member across the I-shaped core is the core - claims, characterized in that combined to the coil member 1. The reactor according to 1 . It said core member and the core - the least one of the coil member, a metallic fixing member for fixing the reactor to the mounting surface according to claim 1 or claim 2, characterized in that it is a resin integrally molded The reactor in any one. Reactor according to claim 3, wherein the fixing member is in contact with or in close proximity to the U-shaped core, characterized in that it is the heat radiation path from the inside of the resin. Wherein a portion of the fixing member, reactor according to claim 3 or claim 4, characterized in that the spring unit to absorb vibration and / or thermal expansion generated in the reactor is formed. Wherein said coils resin molded to the coil member, the portion facing the mounting surface of the reactor is exposed from the mold resin, characterized in that the heat dissipation from the coil to the mounting surface is secured - the core The reactor in any one of Claims 1-5. The core - the filled in and the resin portion between the pair of coils is molded to the coil member, is formed with mounting holes of the thermistor along the axial direction of the coil, the core - the coil member from the mold The reactor according to any one of claims 1 to 6 , wherein the reactor is die-cut along the axial direction of the coil. In a manufacturing method of a resin mold type reactor formed by winding a coil around a pair of U-shaped cores,
One of the by disposing a coil on the outer periphery of the U-shaped core and the linear portion of the core, these are molded with integral resin core - to produce a coil member,
The other of said U-shaped core to produce core member is molded with resin,
A guide for spacer insertion is formed of mold resin on the inner surface of the coil of the core-coil member,
Between the U-shaped core of the core-coil member and the end surface of the U-shaped core of the core member, a spacer is inserted to secure a gap portion,
Wherein a U-shaped core of the core member core - so that the end faces of the U-type core of the coil member are opposed through the gap portion, a U-shaped core of the core member and the core - inserted inside the coil of the coil member By doing this, the said core-coil member and the said core member are integrated, The manufacturing method of the reactor characterized by the above-mentioned . The core - by inserting a single I-shaped core within the coil of the coil member, then the core U-shaped core of the core member - by inserting inside the coil of the coil member, the core - the coil member The reactor manufacturing method according to claim 8, wherein the core member is integrated.

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