JP5402826B2 - Induction equipment - Google Patents

Description

  The present invention relates to an induction device such as a reactor or a transformer.

  In the prior art disclosed in Patent Document 1, a reactor including a core and a coil is disclosed, and the core includes a side partial core, an intermediate partial core, and a gap spacer. The gap spacer has a central portion in contact with the intermediate partial core and the side partial core, and a protruding portion protruding outward from the intermediate partial core and the side partial core. Each annular portion of the coil is in contact with the protruding portion of the gap spacer, and is configured to support each annular portion of the coil by the protruding portion.

  In the reactor assembling procedure, first, the intermediate partial core and the gap spacer are bonded together, and then a combined body of the intermediate partial core and the gap spacer is fitted in a space surrounded by each annular portion of the coil. At this time, any part of the protruding portion of the gap spacer comes into contact with the inner peripheral surface of the annular portion of the coil, and the relative position between them is determined. Next, the two side partial cores are attached so as to straddle the gap spacer exposed at both ends of the assembly.

JP 2008-28287 A

  In the prior art disclosed in Patent Document 1, the assembly of the reactor is performed by inserting and fitting a combined body obtained by bonding the intermediate partial core and the gap spacer into a space surrounded by each annular portion of the coil. Done. At this time, since the protruding portion of the gap spacer is fitted in contact with the inner peripheral surface of the annular portion of the coil, the insulating coating on the inner peripheral surface of the coil may be damaged.

  The present invention has been made in view of the above problems, and an object of the present invention is an induction device capable of preventing damage to the inner peripheral surface of a coil when a core is inserted into and fixed to an annular coil. On offer.

  In order to solve the above problems, the invention described in claim 1 includes a coil and a core inserted into the coil, and the core includes a resin body integrally provided on the surface thereof. In the induction device, the resin body projects in a direction approaching the inner peripheral surface of the coil from the resin body, and is opposite to the insertion direction or the insertion direction of the core in a state where the core is inserted into the coil. An elastic convex portion that is in contact with the inner peripheral surface of the coil while being inclined in a direction is provided.

  According to the first aspect of the present invention, when the core is inserted and fixed in the coil, the resin body integrally provided on the surface of the core protrudes in a direction approaching the inner peripheral surface of the coil from the resin body. In addition, an elastic convex portion is provided in contact with the inner peripheral surface of the coil while being inclined in the insertion direction of the core or in the direction opposite to the insertion direction in a state where the core is inserted into the coil. Therefore, the pressing force on the contact surface with the coil can be reduced by the elastic convex portion being in contact with the coil inner peripheral surface while the core is inserted into the coil, so that the inner peripheral surface of the coil can be reduced. It is possible to prevent damage.

  According to a second aspect of the present invention, in the induction device according to the first aspect, the elastic convex portion is in surface contact with the inner peripheral surface of the coil at a side portion thereof in an inclined state. To do.

  According to the second aspect of the invention, since the elastic convex portion is in an inclined state and is in surface contact with the inner circumferential surface of the coil at the side portion thereof, the contact area can be increased.

  According to a third aspect of the present invention, in the guidance device according to the first or second aspect, the elastic convex portion is formed so as to become narrower from the resin body toward the distal end portion.

  According to the third aspect of the present invention, since the elastic convex portion is formed so as to become narrower from the resin body toward the tip portion, the tip portion can be flexibly deformed with respect to the inner peripheral surface of the coil. The contact area can be increased and the pressing force per unit area can be reduced. Further, it can be supported by a thick base portion (root portion), and the mechanical strength against the support force and vibration of the elastic convex portion with respect to the coil can be increased.

  According to a fourth aspect of the present invention, in the guidance device according to any one of the first to third aspects, a plurality of the elastic convex portions are provided at equal intervals in the outer peripheral direction perpendicular to the insertion direction of the core. It is formed.

  According to the invention described in claim 4, since the plurality of elastic convex portions are formed at equal intervals in the outer peripheral direction perpendicular to the core insertion direction, a substantially equal distance is secured with respect to the periphery of the core. However, the coil can be reliably supported.

  According to a fifth aspect of the present invention, in the guidance device according to the fourth aspect, the core has a rectangular cross section, and the elastic convex portion is arranged at the center of each side of the rectangle. .

  According to invention of Claim 5, the effect equivalent to Claim 4 can be acquired with respect to a core with a rectangular cross section.

  A sixth aspect of the present invention is the induction device according to any one of the first to fifth aspects, wherein the elastic convex portion is integrally formed with a resin body.

  According to the invention of claim 6, since the elastic convex portion is integrally formed with the resin body, the elastic convex portion may be integrally formed at the time of molding the resin body on the surface of the core without increasing the number of manufacturing steps. An elastic convex part can be manufactured.

  A seventh aspect of the present invention is the guidance device according to any one of the first to sixth aspects, wherein the elastic convex portion protrudes in a direction opposite to the insertion direction of the core. And

  According to the seventh aspect of the present invention, since the elastic protrusion protrudes in the direction opposite to the insertion direction of the core, the pressing force on the contact surface with the coil is reduced, and the elastic protrusion is smoothly guided into the coil. Can be inserted. Therefore, damage to the inner peripheral surface of the coil accompanying insertion can be further prevented.

  The invention according to claim 8 is the induction device according to any one of claims 1 to 6, wherein the induction device has another core inserted into the coil, and the core and the other core The tip of each is joined directly or indirectly in the coil, the elastic convex portion is inclined in the insertion direction of the core, and the other core is inserted in a direction opposite to the insertion direction of the core. And a convex portion that protrudes in the insertion direction of the other core is provided, and with the insertion of the core and the other core, the convex portion is located between the base portion and the distal end portion of the elastic convex portion. The elastic convex portion is deformed by being in contact with and pressed against the middle part of the coil, and is in contact with the inner peripheral surface of the coil.

  According to the eighth aspect of the present invention, one core provided with the elastic convex portion is inserted from one end portion of the coil, and the other core provided with the convex portion is inserted from the other end portion of the coil. Then, the elastic convex portion is deformed by bringing the convex portion into contact with the abdominal portion between the base portion and the distal end portion of the elastic convex portion, and the elastic convex portion is brought into contact with the inner peripheral surface of the coil. . Thus, since the coil inner peripheral surface and the elastic convex portion are in contact with each other after the insertion is completed, it is possible to reliably prevent damage to the inner peripheral surface of the coil at the time of insertion.

  According to the present invention, when the resin body integrally provided on the surface of the core is provided with the elastic convex portion protruding in the direction approaching the inner peripheral surface of the coil, the coil is inserted into the coil and fixed. It is possible to prevent damage to the inner peripheral surface.

It is a top view which shows the whole structure of the reactor which concerns on 1st Embodiment. It is the sectional view on the AA line in FIG. It is a BB partial sectional view in FIG. It is a schematic diagram which shows the assembly procedure of the reactor which concerns on 1st Embodiment. (A) shows the state when one core is inserted into the coil, (b) shows the state when the other core is inserted into the coil, (c) when the other core is joined and integrated with one core Shows the state. It is a fragmentary sectional view equivalent to FIG. 3 in 1st Embodiment of the reactor which concerns on 2nd Embodiment. It is a schematic diagram which shows the assembly procedure of the reactor which concerns on 2nd Embodiment. (A) shows the state when one core is inserted into the coil, (b) shows the state when the other core is inserted into the coil, (c) the other core is brought into contact with and integrated with one core. Indicates the state of the hour. It is sectional drawing equivalent to FIG. 2 in 1st Embodiment which concerns on other embodiment. It is a schematic diagram which shows the state before and behind insertion to the coil which concerns on other embodiment. (A) shows the state before insertion into the coil, (b) shows the state after insertion into the coil.

(First embodiment)
Hereinafter, the reactor which concerns on 1st Embodiment is demonstrated based on FIGS. 1-4.
As shown in FIG. 1 and FIG. 2, a reactor 10 as an induction device includes U-shaped cores 11 and 12 arranged opposite to each other, and an annular coil formed by winding the U-shaped cores 11 and 12. 15 and 16 and resin bodies 13 and 14 provided on the surfaces of the U-shaped cores 11 and 12. The reactor 10 is integrally formed with a plurality of plate springs 17 as fixing members, and the reactor 10 has a structure that is fixed to an external structure (not shown) via the plate springs 17. In FIG. 1, the arrangement direction of the U-shaped cores 11 and 12 is the left-right direction (the left-right direction of the paper), the direction perpendicular thereto is the front-rear direction, and the direction perpendicular to the left-right direction and the front-rear direction (the direction perpendicular to the paper surface). Is the vertical direction.

The U-shaped cores 11 and 12 have a U-shaped curved shape, and are composed of curved portions 11A and 12A and linear portions 11B and 12B provided on both sides of the curved portions 11A and 12A, and have the same cross-sectional rectangular shape. It has a shape.
A gap plate 18 is disposed between the U-shaped cores 11 and 12, and the U-shaped cores 11 and 12 are integrally coupled in a track shape via the gap plate 18. The U-shaped cores 11 and 12 are made of a magnetic material such as ferrite.
As the gap plate 18, a non-magnetic and heat-resistant material is used. For example, a ceramic plate or the like is used.

  The coils 15 and 16 are formed in a rectangular tube shape by winding a rectangular wire with a rectangular cross section in an edgewise shape. The coil 15 and the coil 16 are arranged in parallel to each other, and are respectively connected to each other at one end portion and provided with a drawing portion (not shown) that protrudes outward at the other end portion. Each drawer part is connected to an electric circuit (not shown). As the flat wire, a copper wire insulated with enamel or the like is used.

As shown in FIG. 2, the resin body 13 is provided on the surface of the U-shaped core 11 and is integrally formed with the U-shaped core 11. In the resin body 13 provided on the surface of the straight portion 11B in the U-shaped core 11, elastic convex portions 13A are integrally formed at four locations around the upper surface, the lower surface, and the front and rear side surfaces by a resin and the like. The elastic convex portion 13A is disposed at the center of each side of the rectangle.
As shown in FIG. 3, the elastic convex portion 13 </ b> A protrudes from the resin body 13 in a direction approaching the inner peripheral surface 15 </ b> A of the coil 15 and is inclined and formed in a direction opposite to the insertion direction D <b> 1 of the U-shaped core 11. And has a tongue-like shape. That is, the elastic convex portion 13A is formed to be inclined so that the amount of protrusion increases in the direction opposite to the insertion direction D1. The elastic convex portion 13A protrudes with a predetermined width and thickness. Further, the base portion (root portion) is thicker and the distal end portion is thinner, and the outer side portion from the distal end portion to the middle abdominal portion is the coil 15. In contact with the inner peripheral surface 15A.

Similarly, a resin body 14 is integrally formed on the surface of the U-shaped core 12, and the resin body 14 provided on the surface of the linear portion 12 </ b> B in the U-shaped core 12 includes a periphery 4 on the upper surface, the lower surface, and the front and rear side surfaces. The elastic convex portion 14A is integrally formed with the resin body 14 and a mold at a location. The elastic convex portion 14A is disposed at the center of each side of the rectangle.
14 A of elastic convex parts protrude in the direction approaching 15 A of inner peripheral surfaces of the coil 15 from the resin body 13, and it inclines in the direction opposite to the insertion direction D2 of the U-shaped core 12, and is formed in the shape of a tongue piece have. That is, the elastic convex portion 14A is formed to be inclined so that the amount of protrusion increases in the direction opposite to the insertion direction D2. The elastic convex portion 14A protrudes with a predetermined width and thickness. Further, the base portion (base portion) is thicker and the distal end portion is thinner, and the outer side portion from the distal end portion to the middle abdominal portion is the coil 15. In contact with the inner peripheral surface 15A.

As shown in FIG. 2, the front and rear widths of the inner peripheral surfaces 15A and 16A of the coils 15 and 16 are M1 and L1, and the vertical widths are M2 and L2. Moreover, as shown to Fig.4 (a), (b), let the protrusion amount from the outer peripheral surfaces 13B and 14B of the resin bodies 13 and 14 of the elastic convex parts 13A and 14A be H1 and H2, respectively. The protruding amounts H1 and H2 correspond to variations in the dimensional tolerances of the front and rear widths M1 and L1 and the vertical widths M2 and L2 of the inner peripheral surfaces 15A and 16A of the coils 15 and 16, respectively. , 12 and the inner peripheral surfaces 15A and 16A of the coil, the elastic convex portions 13A and 14A always have a pressing force within a predetermined tolerance while maintaining the distances in the vertical direction and the front-rear direction at substantially equal distances. The dimensions are set so that they can be contacted with each other.
As the resin bodies 13 and 14, a resin having excellent heat resistance is used, and for example, polyphenylene sulfide resin (abbreviated as PPS) or polybutylene terephthalate resin (abbreviated as PBT) is used.

Next, the assembly procedure of reactor 10 having the above structure will be described.
First, as shown in FIG. 4A, the gap plate 18 is joined to the tip of the straight portion 11B of the U-shaped core 11 with an adhesive. Then, the bonded body of the U-shaped core 11 and the gap plate 18 is inserted into the coil 15 in a state where an adhesive is applied to the surface of the gap plate 18 opposite to the bonded portion with the U-shaped core 11.

Next, as shown in FIG. 4B, the U-shaped core 11 inserted into the coil 15 is in the D1 direction while the outer side portion of the elastic convex portion 13A is in sliding contact with the inner peripheral surface 15A of the coil 15. To a predetermined position.
Next, the U-shaped core 12 is inserted into the coil 15 from the opposite direction.

  Next, as shown in FIG. 4 (c), the U-shaped core 12 inserted into the coil 15 is in the D2 direction while the outer side portion of the elastic convex portion 14A is in sliding contact with the inner peripheral surface 15A of the coil 15. To a predetermined position. Then, the tip of the straight portion 12 </ b> B of the U-shaped core 12 abuts on the gap plate 18 and is joined to the gap plate 18.

In this way, the U-shaped cores 11 and 12 are integrally joined via the gap plate 18, and the elastic convex portions 13A and 14A formed on the resin bodies 13 and 14 around the U-shaped cores 11 and 12, respectively. As a result, the inner peripheral surfaces 15A and 16A of the coils 15 and 16 are supported while maintaining a substantially equal distance from the outer peripheral surfaces of the U-shaped cores 11 and 12, and the assembly of the reactor 10 is completed.
4A to 4C, the insertion and joining of the straight portion 11B of the U-shaped core 11 and the straight portion 12B of the U-shaped core 12 into the coil 15 have been described. However, the insertion and joining of the straight portion 11B of the U-shaped core 11 and the straight portion 12B of the U-shaped core 12 into the coil 16 are similarly performed.

Next, the operation of the reactor 10 having the above configuration will be described.
As shown in FIGS. 4A and 4B, when the reactor 10 is assembled, the straight portion 11B of the U-shaped core 11 is inserted into the coil 15 from the left end portion toward the D1 direction (right direction). The At this time, the elastic convex portion 13A formed on the straight portion 11B is inclined and protruded in the direction opposite to the insertion direction D1 (left direction) of the U-shaped core 11 (in the direction opposite to the insertion direction D1). By forming the protrusion H1 so as to increase, the protrusion 15 can be smoothly guided and inserted into the coil 15. At the same time, the outer side portion of the elastic convex portion 13A is inserted to a predetermined position in the D1 direction while being in sliding contact with the inner peripheral surface 15A of the coil 15, but the inclined direction (left direction) of the elastic convex portion 13A and the coil 15 are inserted. Since the relative movement direction (left direction) of the inner peripheral surface 15A of the coil 15 is the same direction, for example, compared to the case where the spacer projects in the direction perpendicular to the insertion direction of the core as in the prior art, the coil 15 It is possible to reduce the pressing force on the contact surface with the inner peripheral surface 15A. That is, when the elastic convex portion 13A protrudes in a direction perpendicular to the insertion direction of the core, the tip end portion of the elastic convex portion 13A and the inner peripheral surface 15A of the coil 15 are in an edge contact state, and the contact area is reduced. Therefore, the pressing force per unit contact surface is increased, but in the same direction, the outer side portion of the elastic convex portion 13A and the inner peripheral surface 15A of the coil 15 are in a surface contact state, the contact area increases, and the unit Since the pressing force per contact surface is reduced, the coil coating can be prevented from being damaged.

  Similarly, as shown in FIGS. 4B and 4C, the straight portion 12B of the U-shaped core 12 is inserted into the coil 15 from the right end portion toward the D2 direction (left direction). At this time, the elastic convex portion 14A formed on the straight portion 12B is inclined and protruded in the direction opposite to the insertion direction D2 (right direction) of the U-shaped core 12 (in the direction opposite to the insertion direction D2). By forming the protrusion H2 so as to increase, the protrusion 15 can be smoothly guided and inserted into the coil 15. At the same time, the outer side portion of the elastic convex portion 14A is inserted to a predetermined position in the D2 direction while being in sliding contact with the inner peripheral surface 15A of the coil 15, but the inclined direction (right direction) of the elastic convex portion 14A and the coil 15 are inserted. Since the relative movement direction (right direction) of the inner peripheral surface 15A of the coil 15 is the same direction, the outer side portion of the elastic convex portion 14A and the inner peripheral surface 15A of the coil 15 are in a surface contact state, increasing the contact area and unit contact. Since the pressing force per surface is reduced, the coil coating can be prevented from being damaged.

  As for the insertion of the straight portion 11B of the U-shaped core 11 and the straight portion 12B of the U-shaped core 12 into the coil 16, the elastic convex portion 13A and the elastic convex portion 14A are respectively connected to the U-shaped core 11, 12 is formed so as to project in a direction opposite to the insertion direction of 12, so that it can be smoothly guided and inserted into the coil 16, and the inner peripheral surface 16 </ b> A of the coil 16 and the elastic protrusions 13 </ b> A and 14 </ b> A can be inserted. It is possible to reduce the pressing force per unit contact surface accompanying the surface contact with the outer side portion.

The resin body 13 provided around the linear portion 11B is provided with elastic convex portions 13A at four locations around the resin body 13, so that the inner peripheral surfaces 15A and 16A of the coil 15 and the coil 16 are connected to the U-shaped core 11. It is possible to maintain a substantially uniform distance with respect to the outer peripheral surface.
In addition, the resin body 14 provided around the straight portion 12B is provided with elastic convex portions 14A at four locations around the resin body 14 so that the inner peripheral surfaces 15A and 16A of the coil 15 and the coil 16 can be connected to the U-shaped core. Each of the 12 outer peripheral surfaces can be maintained at a substantially equal distance.
As described above, a plurality (four) of the elastic convex portions 13A, 14A are formed at equal intervals in the outer peripheral direction perpendicular to the insertion directions D1, D2 of the U-shaped cores 11, 12. The coils 15 and 16 can be reliably supported around the U-shaped cores 11 and 12 while maintaining a substantially equal distance.

The reactor 10 according to the first embodiment has the following effects.
(1) Regarding the insertion of the straight portion 11B of the U-shaped core 11 and the straight portion 12B of the U-shaped core 12 into the coils 15 and 16, the elastic convex portion 13A and the elastic convex portion 14A of the U-shaped cores 11 and 12 By being formed so as to protrude in a direction opposite to the insertion direction, it can be smoothly guided and inserted into the coils 15 and 16, and the inner peripheral surfaces 15A and 16A of the coils 15 and 16 and the elastic protrusions can be inserted. It is possible to reduce the pressing force per unit contact surface due to surface contact with the outer side portions of the portions 13A and 14A. Therefore, damage to the inner peripheral surfaces 15A and 16A of the coils 15 and 16 due to insertion can be prevented.
(2) The resin bodies 13 and 14 provided around the straight portions 11B and 12B are provided with elastic convex portions 13A and 14A at four locations around the outer periphery of the U-shaped cores 11 and 12, respectively. The inner peripheral surfaces 15A and 16A of the coils 15 and 16 can be maintained at substantially equal distances from the surface, and the coils 15 and 16 can be reliably supported.
(3) Since the coils 15 and 16 can be kept at an approximately equal distance from the U-shaped cores 11 and 12, the vortex loss bias due to leakage of magnetic flux generated by the coils can be reduced.
(4) Since the elastic protrusions 13A and 14A are integrally formed with the resin bodies 13 and 14, the elastic protrusions 13A and 14A are integrated when the resin bodies 13 and 14 are formed on the surfaces of the U-shaped cores 11 and 12. The elastic projections 13A and 14A can be manufactured without increasing the number of manufacturing steps.
(5) Since the elastic convex portions 13A and 14A are thinner toward the tip, the outer side portions can be flexibly deformed with respect to the inner peripheral surfaces 15A and 16A of the coils 15 and 16, and the contact area is increased. Thus, the pressing force per unit area can be reduced. On the other hand, it can be supported by a thick base, and the mechanical strength against the support force and vibration of the elastic convex portions 13A and 14A with respect to the coils 15 and 16 can be increased.

(Second Embodiment)
Next, the reactor which concerns on 2nd Embodiment is demonstrated based on FIG.5 and FIG.6.
In this embodiment, the shape of the elastic convex portions 13A and 14A in the first embodiment is changed, and other configurations are common.
Therefore, here, for convenience of explanation, some of the reference numerals used in the previous explanation are used in common, explanation of common configurations is omitted, and only the changed parts are explained.

As shown in FIG. 5, the resin body 23 provided on the surface of the straight portion 21 </ b> B in the U-shaped core 21 has elastic convex portions 23 </ b> A integrally formed with the resin body 23 at four locations around the upper surface, the lower surface, and the front and rear side surfaces. Has been. The elastic convex portion 23A is arranged at the center of each side of the rectangle.
The elastic convex portion 23A protrudes from the resin body 23 in a direction approaching the inner peripheral surface 15A of the coil 15, and is inclined to the insertion direction D1 of the U-shaped core 21, and has a tongue-like shape. Yes. That is, the elastic convex portion 23A is formed so as to be inclined so that the protruding amount thereof increases in the insertion direction D1. The elastic convex portion 23A protrudes with a predetermined width and thickness. Further, the thickness is thicker at the base and thinner toward the tip, and a U-shaped core 22 (another core) and a U-shaped core 21 to be described later. Are not in contact with each other, the tip of the elastic convex portion 23A is not in contact with the inner peripheral surface 15A of the coil 15, and there is a gap between them. That is, as shown in FIG. 6 (b), the distance between the elastic convex portions 23A formed on the upper surface and the lower surface of the resin body 23 in the U-shaped core 21 is m2, and it is formed on both front and rear side surfaces (not shown). If the distance between the elastic convex portions 23A is m1, there is a relationship of M1> m1 and M2> m2.

On the resin body 23 provided on the surface of the straight portion 22B in the U-shaped core 22, convex portions 24A are integrally formed with the resin body 24 at four locations around the upper surface, the lower surface, and the front and rear sides. The convex portion 24A is arranged at the center of each side of the rectangle.
The convex portion 24A is formed to protrude toward the insertion direction D2 of the U-shaped core 22, and has a tongue-like shape having a predetermined width and thickness. The tip of the convex portion 24A comes into contact with and presses the middle part between the base portion and the tip portion of the elastic convex portion 23A, so that the elastic convex portion 23A is deformed and contacts the inner peripheral surface 15A of the coil 15.

Next, the assembly procedure and operation of the reactor having the above structure will be described.
First, as shown in FIG. 6A, the gap plate 18 is joined to the tip of the straight portion 21B of the U-shaped core 21 with an adhesive. Then, the bonded body of the U-shaped core 21 and the gap plate 18 is inserted into the coil 15 in a state where an adhesive is applied to the surface of the gap plate 18 opposite to the bonded portion with the U-shaped core 21.

Next, as shown in FIG. 6B, the U-shaped core 21 inserted into the coil 15 has a relationship of M1> m1 and M2> m2, so that the tip of the elastic convex portion 23A is coiled. 15 is not in contact with the inner peripheral surface 15 </ b> A, and a gap is formed between them, so that it can be smoothly inserted into the coil 15.
Next, the U-shaped core 22 is inserted into the coil 15 from the opposite direction, and the tip of the convex portion 24A provided at the center of each side of the rectangle in the U-shaped core 22 corresponds to each side of the rectangle in the U-shaped core 21. The elastic convex portion 23A provided at the center is inserted and abutted between the base portion and the distal end portion.

Next, as shown in FIG. 6C, when the U-shaped core 22 is pushed in until the gap plate 18 and the U-shaped core 22 come into contact with each other, the tip of the convex portion 24A becomes the base portion and the tip portion of the elastic convex portion 23A. The elastic convex portion 23A is deformed by abutting against and pressing against the abdominal portion between the elastic convex portion 23A and the inner peripheral surface 15A of the coil 15 in contact with each other.
Thereby, the pushing force in the insertion direction D2 of the U-shaped core 22 is converted into a pushing force toward the inner peripheral surface of the coil 15 on the outer side portion of the elastic convex portion 23A by pressing the middle portion of the elastic convex portion 23A. Thus, the support force of the coil 15 by the elastic convex portion 23 </ b> A is obtained according to the pushing force of the U-shaped core 22.

In this way, the U-shaped cores 21 and 22 are integrally joined via the gap plate 18, and the coil 15 is supported by the elastic convex portion 23 </ b> A formed on the resin body 23 around the U-shaped core 21. This completes the assembly of the reactor. In addition, although the front-end | tip of the U-shaped core 21 and the U-shaped core 22 is joined directly or indirectly in a coil, in this embodiment, the case where it joins indirectly via the gap board 18 is shown. ing.
6A to 6C, the insertion and joining of the straight portion 21B of the U-shaped core 21 and the straight portion 22B of the U-shaped core 22 into the coil 15 have been described. However, the insertion and joining of the straight portion 21B of the U-shaped core 21 and the straight portion 22B of the U-shaped core 22 into the coil 16 are similarly performed.

The reactor according to the second embodiment has the following effects.
(6) The U-shaped core 21 is provided with an elastic convex portion 23A inclined in the core insertion direction D1, and the U-shaped core 22 is provided with a convex portion 24A protruding in the core insertion direction D2. When the tip of the convex portion 24A abuts against and presses against the middle part between the base portion and the tip portion of the elastic convex portion 23A, the elastic convex portion 23A is deformed and the side portions outside the elastic convex portion 23A and the coils 15, 16 The inner peripheral surfaces 15A and 16A come into contact with each other. As described above, the inner peripheral surfaces 15A and 16A of the coils 15 and 16 come into contact with the outer side portions of the elastic convex portion 23A after the insertion is completed, so that the inner peripheral surfaces 15A and 16A of the coil can be reliably damaged during the insertion. Can be prevented.
(7) The resin body 23 provided around the linear portion 21B is provided with elastic convex portions 23A at four locations around the resin body 23, so that the elastic convex portions 23A and the convex portions 24A are in contact with each other. The inner peripheral surfaces 15A and 16A of the coils 15 and 16 can be maintained at substantially equal distances from the outer peripheral surfaces of the U-shaped cores 21 and 22, respectively, and the coils 15 and 16 can be reliably supported.
(8) Since the coils 15 and 16 can be kept at a substantially equal distance from the U-shaped cores 21 and 22, the vortex loss due to leakage of magnetic flux generated by the coils can be reduced.
(9) Since the elastic protrusions 23A and the protrusions 24A are integrally formed with the resin bodies 23 and 24, the elastic protrusions 23A and protrusions are formed when the resin bodies 23 and 24 are formed on the surfaces of the U-shaped cores 21 and 22. The portion 24A may be integrally formed, and the elastic convex portion 23A and the convex portion 24A can be manufactured without increasing the number of manufacturing steps.
(10) Since the elastic convex portion 23A is thinner toward the tip, the outer side portion is flexible with respect to the inner peripheral surfaces 15A and 16A of the coils 15 and 16 in the contact state with the inner peripheral surface of the coil. The contact area can be increased and the pressing force per unit area can be reduced. On the other hand, it can be supported by a thick base, and the mechanical strength against the support force and vibration of the elastic convex portion 23A with respect to the coils 15 and 16 can be increased.

The present invention is not limited to the above-described embodiment, and various modifications are possible within the scope of the spirit of the invention. For example, the following modifications may be made.
In the first and second embodiments, the coil is described as being formed in a rectangular tube shape with respect to the core having a rectangular cross section. However, the coil is wound in a cylindrical shape around the core having a circular cross section. It may be formed. As shown in FIG. 7, a resin body 32 is integrally formed on the surface of a U-shaped core 31 having a circular cross section, and the resin body 32 projects toward the inner peripheral surface of the coils 33, 34, thereby forming a U-shaped core. An elastic convex portion 32 </ b> A is provided that is inclined in the insertion direction of 31 or the opposite direction. The elastic convex portions 32A are formed at three locations in the circumferential direction, and are formed so that the circumferential positions are equally spaced (α °). In this case, at least three elastic protrusions may be formed in the circumferential direction.
In the first embodiment, the elastic protrusions 13A and 14A provided on the surfaces of the U-shaped cores 11 and 12 are formed to be inclined in the direction opposite to the insertion direction of the U-shaped cores 11 and 12. However, as shown in FIG. 8 (a), in a state before being inserted into the coil 43, the elastic protrusion protruding toward the outer peripheral direction on the resin body 42 integrally formed on the surface of the U-shaped core 41. The part 42A may be provided. As shown in FIG. 8B, when the U-shaped core 41 is inserted into the coil 43, the elastic convex portion 42A is deformed by contacting the inner peripheral surface of the coil 43, and the insertion direction D1 Is tilted in the opposite direction. In the case of such a configuration, in addition to the same effect as the first embodiment, the elastic convex portion 42A is not inclined at the time of molding, so the U-shaped core 41 and the resin body 42 are integrally molded by molding. Sometimes, the mold can be easily removed along the protruding direction of the elastic convex portion 42A, and the manufacture becomes easy.
In the first and second embodiments, the U-shaped cores 11 and 12 or the U-shaped cores 21 and 22 arranged opposite to each other have been described as constituting the reactor core. A reactor core may be configured by interposing a linear core. In the case of a configuration in which a U-shaped core and a linear core are combined, it is possible to provide elastic convex portions at a plurality of locations in the axial direction of the core.
O Instead of the U-shaped cores arranged to face each other in the first and second embodiments, a reactor having a configuration in which an E-shaped core is arranged to face each other and a coil is wound around the central leg portion may be used. In addition, the present invention can be applied to a combination of an E-shaped core and an I-shaped core, a combination of a C-shaped core and a T-shaped core, or the like.
○ In the first and second embodiments, the resin body and the elastic convex portion are described as being integrally molded. However, the resin body is integrally molded with the core, and the elastic convex portion is molded separately. You may combine a convex part. Alternatively, a resin component in which the elastic convex portion and the resin body are integrally molded may be separately molded and fitted into the core.
In the first and second embodiments, the reactor has been described as a reactor, but may be applied to a transformer.

DESCRIPTION OF SYMBOLS 10 Reactor 11, 12 U-shaped core 13, 14 Resin body 13A, 14A Elastic convex part 15, 16 Coil 15A, 16A Inner peripheral surface 21, 22 U-shaped core 23, 24 Resin body 23A Elastic convex part 24A Convex Part D1, D2 Insertion direction of U-shaped core

Claims (8)

A coil and a core inserted into the coil, the core having a resin body integrally provided on the surface thereof,
The resin body protrudes in a direction approaching the inner peripheral surface of the coil from the resin body, and the core is inserted in the coil while being inclined in the insertion direction of the core or the direction opposite to the insertion direction. An induction device comprising an elastic convex portion in contact with an inner peripheral surface of a coil.   The induction device according to claim 1, wherein the elastic convex portion is in surface contact with the inner peripheral surface of the coil at a side portion thereof in an inclined state.   The induction device according to claim 1, wherein the elastic convex portion is formed so as to become narrower from the resin body toward the tip portion.   The induction device according to any one of claims 1 to 3, wherein a plurality of the elastic convex portions are formed at equal intervals in an outer peripheral direction perpendicular to the insertion direction of the core.   The induction device according to claim 4, wherein the core has a rectangular cross section, and the elastic convex portion is arranged at the center of each side of the rectangle.   The induction device according to claim 1, wherein the elastic convex portion is integrally formed with a resin body.   The induction device according to any one of claims 1 to 6, wherein the elastic convex portion protrudes in an inclined direction opposite to the insertion direction of the core.   The induction device has another core inserted into the coil, and the core and the tip of the other core are joined directly or indirectly in the coil, and the elastic convex portion is The core is inclined in the insertion direction of the core, and the other core is inserted in a direction opposite to the insertion direction of the core and is provided with a convex portion protruding toward the insertion direction of the other core. With the insertion of the other core, the convex portion comes into contact with and presses against the middle portion between the base portion and the tip portion of the elastic convex portion, so that the elastic convex portion is deformed and the inner circumference of the coil The induction device according to claim 1, wherein the induction device is configured to contact a surface.

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