JP6895214B2 - Reactor - Google Patents

Description

The present invention relates to a reactor in which the core is housed in a case.

The reactor is used in various applications such as a drive system for a hybrid vehicle and an electric vehicle. For example, as a reactor used in an in-vehicle booster circuit, a coil wound around a resin bobbin arranged around a core is often used.

In this type of reactor, a reactor body having a core and a coil attached to a part of the core is housed in a metal case, and a filler is filled and solidified in the case. That is, the reactor body is surrounded on all four sides by the metal wall of the case, and the filler is filled and solidified in the gap of the accommodation space formed by the metal wall.

Japanese Unexamined Patent Publication No. 2013-026420

In some cases, not only the four sides of the reactor body are surrounded by the metal wall of the case as in the prior art, but also a part thereof is replaced with resin. In this case, the case and the resin wall are joined, and the reactor body is surrounded by the metal wall and the resin wall. When the filler is filled in the enclosed area and solidified, the filler thermally expands at that time. Then, a load directed to the outside of the reactor body is applied to the metal wall and the resin wall, and there is a problem that the resin wall is peeled off from the case. Further, even after the filler is solidified, there is a problem that the resin wall is peeled off from the case due to the same load due to thermal expansion.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a reactor capable of preventing peeling of a resin wall from a case.

The reactor of the present invention includes a reactor body having a core and a coil, a metal case for accommodating the reactor body, and a filling molding portion in which a filler is filled in a gap in the case. Has a bottom plate and a plurality of metal walls that are integrally provided with the bottom plate and surround the reactor body, and any of the metal walls is provided with an opening that exposes the periphery of the reactor body. A notch is provided on the upper edge of the metal wall without the opening, and the end of the coil is pulled out upward between the notch and the core. The opening is provided with a resin wall that closes the opening, and the resin wall has a first overhang that projects from the edge of the opening to the inside of the case and is in contact with the inner circumference of the metal wall. It is characterized in that a portion and a third overhanging portion made of resin, which projects from the first overhanging portion and fits into the notch portion, are provided.

According to the present invention, it is possible to obtain a reactor capable of preventing the resin wall from peeling off from the case.

It is an overall perspective view of the reactor which concerns on 1st Embodiment. It is an exploded perspective view of the reactor which concerns on 1st Embodiment. It is a perspective view which shows the structure of each unit of the reactor which concerns on 1st Embodiment. It is a perspective view which shows the structure of a core. It is the top side perspective view seen from the front of the case. It is the top side perspective view seen from the rear of the case. It is the bottom side perspective view of the upper unit. It is a top view side perspective view of the lower unit. It is the bottom side perspective view of the lower unit. It is a cross-sectional view of the lower unit, and shows the cross section AA of FIG. It is an overall perspective view of the reactor which concerns on 2nd Embodiment. It is a cross-sectional view of the lower unit, and shows the BB cross section of FIG. It is sectional drawing of the lower unit which concerns on the modification of 2nd Embodiment.

Hereinafter, the reactor according to the embodiment of the present invention will be described with reference to the drawings.

[1. First Embodiment]
[1-1. Outline configuration]
FIG. 1 is an overall perspective view of the reactor according to the first embodiment. FIG. 2 is an exploded perspective view of the reactor according to the first embodiment. FIG. 3 is a perspective view showing the configuration of each unit of the reactor according to the first embodiment.

The reactor is an electromagnetic component that converts electrical energy into magnetic energy and stores and releases it, and is used for raising and lowering voltage. The reactor of the present embodiment is a large-capacity reactor used in, for example, a drive system of a hybrid vehicle or an electric vehicle. The reactor is a major component of the booster circuit installed in these automobiles.

As shown in FIGS. 1 to 3, the reactor according to the present embodiment includes a core 1, a resin member 2, a case 4, a coil 5, and a filling molding portion 6.

The core 1 is composed of an upper core 1A and a lower core 1B, and the resin member 2 has an upper cover 2A that covers the upper core 1A and a lower cover 2B that covers the lower core 1B. The lower cover 2B integrates the lower core 1B and the case 4 to form the lower unit 10B, and the upper core 1A and the upper cover 2A form the upper unit 10A. A coil 5 is fitted into the middle leg portion of the lower unit 10B, the upper unit 10A is assembled to the lower unit 10B, and a filler is filled and solidified in the gap in the case 4 to form a filling molding portion 6 to form a reactor. ..

[1-2. Detailed configuration]
The detailed configuration of each part of the reactor of the present embodiment will be described with reference to FIGS. 4 to 10 in addition to FIGS. 1 to 3. In the present specification, the z-axis direction shown in FIG. 1 is referred to as the "upper" side, and the opposite direction is referred to as the "lower" side. In explaining the configuration of each member, "bottom" is also referred to as "bottom" or "back". The "upper" and "lower" refer to the positional relationship of each configuration of the reactor, and do not refer to the positional relationship and direction when the reactor is mounted on the actual machine.

The core 1 is an annular core composed of a magnetic material. As the core 1, a ferrite core, a laminated steel plate, a dust core, or a metal composite core can be used. The metal composite core is a core formed by molding a magnetic material, which is a mixture of magnetic powder and resin, with a mold, and is a core that has not been annealed. Here, the core 1 is a dust core.

As shown in FIG. 4, the core 1 is configured by joining the upper core 1A and the lower core 1B. The upper core 1A and the lower core 1B are E-shaped cores having an E-shape, and the same E-shaped core is used. This E-shaped core is composed of a central middle leg 15, outer legs 16 and 17 provided on both sides of the middle leg 15 in parallel with the middle leg 15, and a yoke 18 connecting the respective legs 15 to 17. ..

In the upper core 1A and the lower core 1B, the middle leg 15 constitutes the middle leg portion to which the coil 5 is mounted, the outer legs 16 and 17 form the outer leg portion, and the yoke 18 constitutes the yoke portion. The outer legs 16 and 17 of the upper core 1A and the lower core 1B are in contact with each other and joined by an adhesive or the like, and the middle legs 15 of the upper core 1A and the lower core 1B are separated from each other and have a gap. To do.

That is, the core 1 has a substantially θ shape, and has a middle leg portion to which the coil 5 is mounted, a pair of outer leg portions extending parallel to the middle leg portion on both sides of the middle leg portion, and a middle leg portion and an outer leg portion. It consists of a yoke part that connects the two. When the coil 5 is energized, a magnetic flux is generated in the air core portion of the coil 5, and the generated magnetic flux returns from the middle leg portion to the middle leg portion via the yoke portion and the outer leg portion to form a closed magnetic path.

The case 4 is an accommodating body for accommodating the reactor body having the core 1 and the coil 5. The case 4 is made of a lightweight metal having high thermal conductivity, such as aluminum or an aluminum alloy, and has heat dissipation. In the case 4, at least the surface in contact with the lower cover 2B is roughened. In other words, the case 4 is provided with fine irregularities on the inner peripheral surface by shot blasting or etching.

As shown in FIGS. 2, 5 and 6, the case 4 has a substantially rectangular parallelepiped shape with an open upper surface, and the bottom plate 41 and the opposing front wall 42, rear wall 43, and front are provided integrally with the bottom plate 41. It has a side wall 44 connecting the wall 42 and the rear wall 43. Each of the walls 42 to 44 is a metal wall made of metal, which surrounds the reactor body and forms a storage space for the reactor body.

The bottom plate 41 and the side wall 44 are provided with openings 47 and 48. The bottom plate 41 has a rectangular shape, and a rectangular opening 47 is provided in the center to form a rectangular frame. The side wall 44 is provided with a rectangular opening 48 so that a part of the rectangle is cut out, and a side 44a extending in a series of y directions with the bottom plate 41 and extending in the z direction from both ends of the side 44a. It forms a U-shape consisting of a front wall 42, a rear wall 43, and a series of sides 44b and 44c. These sides 44a to 44c form the edge of the opening 48. The side 44b integrated with the rear wall 43 projects toward the front wall 42, and the side 44c integrated with the front wall 42 projects toward the rear wall 43. The sides 44b and 44c are inclined so that the opposing portions expand the accommodation space inside the case 4. The front wall 42 and the rear wall 43 are substantially rectangular walls that are parallel to each other and thick in the y direction, and are not provided with an opening that exposes the reactor body.

The front wall 42 and the rear wall 43 are provided with recesses 45 in the inner wall portion facing the coil 5. The shape of the recess 45 may have a shape recessed in the y direction and may have a shape that follows the shape of the coil 5. The number of recesses 45 is not particularly limited, and as shown in FIG. 5, the front wall 42 is provided with at least three recesses between the pair of side walls 44. The recess 45 forms two or more steps in the case 4 in the x direction. In the recess 45, a step portion 46 raised at a height between the bottom plate 41 and the upper ends of the walls 42 and 43 is provided on the diagonal line of the bottom plate 41, and the upper core 1A is fixed to the case 4 in the step portion 46. A screw hole 46a is provided for this purpose. The front wall 42 is provided with two notches 42a here. The cutout portion 42a is provided on the front wall 42 in the vicinity where the end portions 51a and 51b of the coil 5 are pulled out above the reactor. That is, the cutout portion 42a is provided so as to cut out at least the upper edge and the inner side of the front wall 42, and in the z direction, one is from the upper edge to the step portion 46 and the other is from the upper edge to the bottom portion of the recess 45. Will be cut out.

As shown in FIG. 2, the resin member 2 covers the periphery of the core member to form the core 1 and is joined to the case 4. The resin member 2 has an upper cover 2A that covers at least a part around the upper core 1A, and a lower cover 2B that covers at least a part around the lower core 1B. The upper cover 2A and the lower cover 2B are each made of resin. As the resin, for example, an epoxy resin, an unsaturated polyester resin, a urethane resin, a BMC (Bulk Molding Compound), a PPS (Polyphenylene sulfide), a PBT (Polybutylene terephlate), or the like can be used.

The upper cover 2A covers at least a part around the upper core 1A. As shown in FIG. 7, the upper cover 2A exposes the inner legs 15, the end faces of the outer legs 16 and 17, the inner and outer side surfaces of the outer legs 16 and 17, and the upper and lower surfaces of the middle legs 15 and the yoke 18. There is an opening. Further, the upper cover 2A is provided with a fixing portion 21 which is mounted on the step portion 46 and for fixing the upper core 1A to the case 4, and the fixing portion 21 is provided with a screw insertion hole 21a. .. The upper core 1A is fixed to the case 4 by inserting the screw 91 into the screw insertion hole 21a and fastening the screw.

Further, an end portion 51a of the coil 5 is pulled out in the vicinity of one of the fixing portions 21, and a partition wall 21b is provided between the screw 91 provided on the fixing portion 21 and the end portion 51a. That is, the partition wall 21b is erected at the upper end of the fixing portion 21 so as to surround the screw insertion hole 21a. Further, on the side surface of the upper cover 2A on the fixed portion 21 side where the partition wall 21b is provided, two regulating portions are provided here to regulate the positions where the end portions 51a and 51b of the coil 5 are pulled out. Here, two protrusions 20 extending outward from the side surface of the upper cover 2A are provided, and one protrusion 20 provided in the vicinity of the fixing portion 21 is provided so as to be parallel to the partition wall 21b. The end portion 51a is located between the protrusion 20 and the partition wall 21b, and the protrusion 20 and the partition wall 21b form one regulating portion. The protrusion 20 and the partition wall 21b are provided with overhanging portions that project toward each other, and come into contact with each other when the positions of the end portions 51a are displaced due to an external force or the like. The other protrusion 20 faces the overhanging portion 25 of the lower cover 2B, which will be described later, and regulates the position of the end portion 51b. That is, the protrusion 20 and the overhanging portion 25 constitute the other regulating portion.

As shown in FIGS. 2 and 8 to 10, the lower cover 2B includes a covering portion 23 that covers the periphery of the lower core 1B, and left and right walls 24 that are erected outside the outer legs 16 and 17 of the lower core 1B. And the overhanging portions 25 provided at both ends of the left and right wall 24.

The covering portion 23 covers the periphery of the lower core 1B and closes the opening 47, and the surface closing the opening 47 and the bottom surface of the bottom plate 41 are flush with each other. The portion of the covering portion 23 that closes the opening 47 is joined to the edge of the opening 47. Further, the covering portion 23 is provided with an opening in which the end faces of the outer legs 16 and 17 and the inner side surfaces of the outer legs 16 and 17 are exposed.

The left and right walls 24 are substantially quadrangular plate-like bodies, and are provided between the front wall 42 and the rear wall 43. The left and right walls 24 close the opening 48 of the side wall 44 and are joined to the edge of the opening 48 of the side wall 44. The left and right walls 24 are flush with the surface of the side wall 44.

The left and right walls 24 are resin walls made of resin, and may be manufactured as separate members and fitted into the opening 48. However, here, the left and right walls 24 are continuously composed of the resin constituting the covering portion 23. There is.

The overhanging portion 25 has a shape that follows the inner circumference of the walls 42 to 44, and is closely joined to the walls 42 to 44. The overhanging portions 25 are provided at both ends of the left and right walls 24, and overhang from the edges of the openings 48, that is, the sides 44b and 44c, to the inside of the case 4, and the outer shape thereof is formed in the recesses 45 of the front wall 42 and the rear wall 43. It has a similar shape. In other words, the overhanging portion 25 not only projects so as to be in contact with the sides 44b and 44c, but also projects to the recess 45 and overlaps the front wall 42, the rear wall 43 or the side wall 44 in the x direction. Here, they overlap in the circled portion shown in FIG.

In the present embodiment, the overhanging portions 25 are provided at four locations, each of which overhangs the inside of the case 4 so as to wrap around the four corners of the case 4. In particular, the overhanging portion 25 at the diagonal position of the lower cover 2B projects so as to surround the fixing portion 21 to insulate the screw 91 in the screw insertion hole 21a from the case 4. Further, the overhanging portion 25 on the front wall 42 side is provided with the overhanging portion 25a, and is closely joined to the surface forming the notch portion 42a. That is, the overhanging portion 25a projects horizontally to the upper end of the overhanging portion 25 on the front wall 42 side and fits into the notch portion 42a. The overhanging portion 25a is located between the end portions 51a and 51b of the coil 5 and the front wall 42 when the reactor is assembled, and secures the insulation between them.

The lower cover 2B is formed by resin molding with the case 4 and the lower core 1B as insert products, and the respective configurations 23, 24, 25, and 25a are made of the same resin and are continuous.

The coil 5 is a conducting wire having an insulating coating. In this embodiment, the coil 5 is a flat wire edgewise coil. However, the wire rod and winding method of the coil 5 are not limited to the edgewise coil of the flat wire, and other forms may be used.

As shown in FIG. 3, the coil 5 is arranged in the case 4 with the winding shaft facing the opening 47, and is attached to the middle leg portion of the core 1. As shown in FIG. 1, both ends 51a and 51b of the coil 5 are pulled out above the reactor between the front wall 42 and the core 1 and are connected to the wiring of an external device such as an external power supply.

The filling molding unit 6 is formed by filling and solidifying a filler in a gap in the accommodating space of the reactor body surrounded by the case 4. A resin that is relatively soft and has high thermal conductivity is suitable as the filler in order to secure the heat dissipation performance of the reactor and reduce the vibration propagation from the reactor to the case 4. Moreover, it is preferable that the filler has an insulating property.

[1-3. Action / effect]
(1) The reactor of the present embodiment includes a reactor main body having a core 1 and a coil 5, a metal case 4 accommodating the reactor main body, and a filling molding portion 6 in which a filler is filled in a gap in the case 4. The case 4 has a bottom plate 41 and a plurality of walls 42 to 44 that are integrally provided with the bottom plate 41 and surround the reactor body. The side wall 44 is provided with an opening 48 that exposes the periphery of the reactor body, the opening 48 is provided with left and right walls 24 that close the opening 48, and the left and right walls 24 are provided with openings 48. An overhanging portion 25 is provided so as to project from the edge of the case 4 to the inside of the case 4 and contact the inner circumference of the side wall 44.

As a result, even if a load is applied to the left and right walls 24 toward the outside, the overhanging portion 25 is caught on the side wall 44, so that the left and right walls 24 are prevented from falling outward and the left and right walls 24 from being peeled off from the case 4. can do. That is, when the filler or the filling molding portion 6 thermally expands when the filler is solidified or when the coil 5 is energized, a load is applied to the outside of the case 4 and the left and right walls 24. Here, the front wall 42 and the rear wall 43 are made of metal and therefore have high strength, but the left and right walls 24 are made of resin and therefore have low strength. Therefore, the load due to the thermal expansion of the filling molding portion 6 tends to be concentrated on the left and right walls 24, and the left and right walls 24 may be peeled off from the side wall 44.

On the other hand, in the present embodiment, since the overhanging portions 25 overhanging the inner shapes of the walls 42 to 44 are provided at both ends of the left and right walls 24, an outer load is applied to the left and right walls 24. However, since the overhanging portion 25 is caught on the side wall 44, specifically, the sides 44b and 44c, it is possible to prevent the left and right walls 24 from peeling off and falling outward. As a result, for example, leakage of the filler can be prevented when the filler is solidified.

(2) A notch 42a is provided on the upper edge of the front wall 42 in which the opening 48 is not provided, and the ends 51a and 51b of the coil 5 are provided between the notch 42a and the core 1. , The left and right walls 24 are provided with an overhanging portion 25a made of resin, which is further overhanging from the overhanging portion 25 and fits into the notch portion 42.

As a result, even when the ends 51a and 51b of the coil 5 are pulled out of the reactor from a portion close to the front wall 42, insulation can be achieved. That is, the front wall 42 made of metal has relatively high strength but low insulation, while the left and right walls 24 made of resin are inferior in strength to metal but have high insulation. By providing a notch 42a at a position close to the ends 51a and 51b of the coil 5 and providing an overhang 25a at the notch 42a, the strength that can withstand the expansion of the filling molding portion 6 is improved. It is possible to achieve both improved insulation.

(3) A recess 45 is provided inside the front wall 42 and the rear wall 43 in which the opening 48 is not provided, and the overhanging portion 25 projects to the recess 45. As a result, the overhanging portion 25 is caught not only on the sides 44b and 44c of the side wall 44 but also on the recess 45, so that the overhanging portion 25 can be made more robust against the load on the left and right walls 24 to the outside. That is, as shown in FIG. 10, the side wall 44, that is, the edge of the opening 48 and the recess 45 form two or more steps in the x direction, and the overhanging portion 25 is caught in the two or more steps. , It becomes more robust against the load on the outside of the left and right walls 24. Further, since the contact area is increased, the bonding force with the case 4 can be increased, and the left and right walls 24 can be further prevented from falling outward.

(4) A resin member 2 that covers the periphery of the core 1 is provided, and the overhanging portion 25 and the left and right walls 24 are made continuous with the resin constituting the resin member 2. That is, since the covering portion 23, the left and right walls 24, and the overhanging portion 25 are integrally formed by the resin molding method, the manufacturing cost and man-hours for separately manufacturing and adhering the covering portion 23 can be reduced, and the manufacturing man-hours can be easily reduced. Can be manufactured.

(5) The bottom plate 41 is provided with an opening 47, and the coil 5 is arranged in the case 4 with the winding shaft facing the opening 47 of the bottom plate 41. As a result, it is possible to suppress a decrease in inductance due to the shielding effect against the leakage flux from the core 1.

The case 4 has a side wall 44 that connects the front wall 42 and the rear wall 43 that are integrally provided with the bottom plate 41, the front wall 42 and the rear wall 43, and has an opening 48. The cover 2B has left and right walls 24 that close the opening 48, so that the left and right walls 24 are joined to the edge of the opening 48. As a result, since there is a part around the core 1 and the coil 5 where the case 4 is not provided, the case 4 does not generate heat due to the leakage flux from the core 1 penetrating the case 4, and the reactor loss is reduced. Will be possible. Further, since the wall of the metal case 4 is replaced with the resin-based left and right walls 24, a lightweight reactor can be obtained.

(6) In the case 4, at least the surface in contact with the overhanging portion 25 is roughened. As a result, the joint force between the case 4 and the overhanging portion 25 can be strengthened, and the left and right walls 24 can be prevented from falling outward.

[2. Second Embodiment]
The reactor according to the second embodiment will be described with reference to FIGS. 11 and 12. The second embodiment has the same basic configuration as the first embodiment. Therefore, only the points different from those of the first embodiment will be described, and the same parts as those of the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted.

FIG. 11 is a perspective view of the reactor according to the second embodiment, and FIG. 12 is a cross-sectional view taken along the line BB of FIG. As shown in FIGS. 11 and 12, the left and right walls 24 are provided with overhangs 26 that project from the edges of the openings 48 to the outside of the case 4. That is, both ends of the left and right walls 24 are bifurcated and overhang with the side wall 44 as a boundary, one of which is an overhang 25 that overhangs the inside of the case 4, and the other that overhangs the outside of the case 4. The overhanging portion 26. In this embodiment, a total of four overhanging portions 26 are provided. The overhanging portion 26 is configured to be continuous with the left and right walls 24, extends along the sides 44b and 44c of the side wall 44, and is in contact with the sides 44b and 44c. Here, the overhanging portion 26 is closely joined to the outside of the sides 44b and 44c of the side wall 44.

As a result, even if an inner load is applied to the left and right walls 24, it is possible to prevent the left and right walls 24 from falling inward. That is, when the energization of the coil 5 is stopped, the filling molding portion 6 also cools as the reactor cools. As the filling molding portion 6 contracts due to this cooling, a load is applied so that the left and right walls 24 adhered to the filling molding portion 6 are pulled inside the case 4. Even in such a situation, according to the present embodiment, the overhanging portion 26 is caught by the edge of the opening 48, that is, the side wall 44, so that the left and right walls 24 fall inward and the left and right walls 24 are case 4 It is possible to prevent peeling from.

Further, as a modification of the first embodiment and the second embodiment, the overhanging portion 26 may be further extended to form an inlay shape. That is, as shown in FIG. 13, a recess 49 may be provided outside the side wall 44 of the front wall 42 and the rear wall 43 of the case 4, and the tip of the overhanging portion 26 may be buried in the recess 49. Specifically, the front wall 42 and the rear wall 43 adjacent to the side wall 44 provided with the opening 48 are provided with recesses 49 recessed in parallel with the side wall 44 on the outside of the opening 48, and are stretched. The tip of the protrusion 26 may be buried in the recess 49.

As a result, even if an outer load due to thermal expansion of the filler or the filling molding portion 6 is applied to the left and right walls 24, the tip of the overhanging portion 26 is caught by the recess 49, so that the left and right walls 24 fall outward. Can be prevented. Further, even if an inner load due to cooling shrinkage of the filler or the filling molding portion 6 is applied to the left and right walls 24, the tip of the overhanging portion 26 is caught by the recess 49, so that the left and right walls 24 are prevented from falling inward. it can. As a result, it is possible to prevent the left and right walls 24 from peeling off from the case 4.

The overhanging portion 26 does not have to be linear as shown in FIG. 11 as long as it is provided on the outside of the side wall 44 along the sides 44b and 44c, and is point-shaped along the sides 44b and 44c. It may be provided in. When the overhanging portion 26 has an inlay shape, the overhanging portion 25 may not be provided.

[3. Other embodiments]
The present invention is not limited to the first and second embodiments, but also includes other embodiments shown below. The present invention also includes a combination of all or any of the first embodiment and the other embodiments described below. Furthermore, various omissions, replacements, and changes can be made to these embodiments without departing from the scope of the invention, and modifications thereof are also included in the present invention.

(1) In the first and second embodiments, the upper core 1A and the lower core 1B are E-shaped cores, but cores having other shapes such as a U-shaped core and an I-shaped core may be used.

(2) In the first and second embodiments, the lower cover 2B integrates the lower core 1B and the case 4 by the resin molding method, but the lower core 1B is separately embedded by the resin molding method. The lower cover 2B may be manufactured, and the product may be fitted into the case 4 to form the lower unit 10B.

1 Core 1A Upper core 1B Lower core 10A Upper unit 10B Lower unit 15 Middle legs 16, 17 Outer legs 18 York 2 Resin member 20 Protrusion 21 Fixing part 21a Screw insertion hole 2A Upper cover 2B Lower cover 23 Covering part 24 Left and right walls 25 Overhang 25a Overhang 26 Overhang 4 Case 41 Bottom plate 42 Front wall 42a Notch 43 Rear wall 44 Side wall 45 Recess 46 Step 46a Screw insertion hole 47, 48 Open 49 Recess 5 Coil 6 Fill molding screw

Claims (8)

Reactor body with core and coil,
A metal case that houses the reactor body and
A filling molding part in which the gap in the case is filled with a filler, and
With
The case has a bottom plate and a plurality of metal walls provided integrally with the bottom plate and surrounding the reactor body.
Any of the metal walls is provided with an opening that exposes the periphery of the reactor body.
A notch is provided on the upper edge of the metal wall without the opening.
The end of the coil is pulled upward between the notch and the core.
The opening is provided with a resin wall that closes the opening.
On the resin wall
A first overhanging portion that projects from the edge of the opening to the inside of the case and is in contact with the inner circumference of the metal wall.
A third overhang made of resin is provided, which overhangs from the first overhang and fits into the notch.
Reactor featuring. Reactor body with core and coil,
A metal case that houses the reactor body and
A filling molding part in which the gap in the case is filled with a filler, and
With
The case has a bottom plate and a plurality of metal walls provided integrally with the bottom plate and surrounding the reactor body.
Any of the metal walls is provided with an opening that exposes the periphery of the reactor body.
A recess is provided inside the metal wall without the opening.
The opening is provided with a resin wall that closes the opening.
The resin wall is provided with a first overhanging portion that projects from the edge of the opening to the inside of the case and is in contact with the inner circumference of the metal wall.
The first overhanging portion extends to the recess.
Reactor featuring. Reactor body with core and coil,
A metal case that houses the reactor body and
A filling molding part in which the gap in the case is filled with a filler, and
A resin member that covers the periphery of the core and
With
The case has a bottom plate and a plurality of metal walls provided integrally with the bottom plate and surrounding the reactor body.
Any of the metal walls is provided with an opening that exposes the periphery of the reactor body.
The opening is provided with a resin wall that closes the opening.
The resin wall is provided with a first overhanging portion that projects from the edge of the opening to the inside of the case and is in contact with the inner circumference of the metal wall.
The first projecting portion and the resin wall, resin and formed Rukoto in a series that constitute the resin member,
Reactor featuring. The resin wall is provided with a second overhanging portion that projects from the edge of the opening to the outside of the case and is in contact with the outside of the metal wall.
The reactor according to any one of claims 1 to 3. The bottom plate is provided with an opening.
The coil is arranged in the case with the winding shaft facing the opening of the bottom plate.
The reactor according to any one of claims 1 to 4. In the case, at least the surface in contact with the first overhanging portion is roughened.
The reactor according to any one of claims 1 to 5. Reactor body with core and coil,
A metal case that houses the reactor body and
A filling molding part in which the gap in the case is filled with a filler, and
With
The case has a bottom plate and a plurality of metal walls provided integrally with the bottom plate and surrounding the reactor body.
Any of the metal walls is provided with an opening that exposes the periphery of the reactor body.
The other metal wall adjacent to the metal wall provided with the opening is provided with a recess on the outside of the opening.
The opening is provided with a resin wall that closes the opening.
The resin wall is provided with a fourth overhanging portion that projects from the edge of the opening to the outside of the case and has a tip embedded in a recess provided in another adjacent metal wall.
Reactor featuring. The case shall be made of aluminum or aluminum alloy,
The reactor according to any one of claims 1 to 7.

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