JP5747780B2 - Magnetic parts - Google Patents

Description

  The present invention relates to a magnetic component including an electromagnetic coil and a core made of a magnetic material.

  2. Description of the Related Art Conventionally, as magnetic parts such as a transformer and a choke coil, an electromagnetic coil and a plurality of cores made of a magnetic material, and a plurality of cores provided with protrusions for preventing displacement are known. (See Patent Document 1 below). An example of a conventional magnetic component is shown in FIGS.

  This magnetic component 9 has two cores 90. Each core 90 includes a plate-like main body 99 and a pair of column portions 91 and 92 provided on the plate-like main body 99. The two cores 90 are combined so that the end surfaces of the pillar portions 91 and 92 are in contact with each other. In addition, the electromagnetic coil 97 is accommodated in the coil accommodating space 900 formed between the pair of column portions 91 and 92. When a current is passed through the electromagnetic coil 97, a magnetic flux φ is generated, and this magnetic flux φ passes through the two cores 90 combined.

  The end surfaces of the column portions 91 and 92 are polished close surfaces 93. Then, the two cores 90 are brought into close contact with each other on the close contact surface 93, thereby eliminating a minute gap between them and reducing the magnetic resistance at the close contact surface 93. This makes it easier for the magnetic flux φ to pass through the close contact surface 93.

  Further, a convex portion 94 is formed on the close contact surface 93 of one pillar portion 91, and a concave portion 95 is formed on the close contact surface 93 of the other pillar portion 92. When the two cores 90 are combined, the convex portion 94 of one core 90a fits into the concave portion 95 of the other core 90b, and the convex portion 94 of the other core 90b fits into the concave portion 95 of the one core 90a. . This facilitates the alignment of the two cores 90 at the time of assembly, and prevents relative displacement of the cores 90 after assembly.

  Similarly to the close contact surface 93, the surface of the convex portion 94 and the surface of the concave portion 95 are also polished. In terms of design, the convex portion 94 and the concave portion 95 are in close contact with each other. Therefore, in terms of design, the magnetic flux φ passes through the close contact surface 93 and also through the convex portion 94 and the concave portion 95.

JP 2000-353622 A

  However, in the conventional magnetic component 9, as shown in FIG. 20, the convex portion 94 and the concave portion 95 may not be in close contact with each other due to variations in the shape of the convex portion 94 and the concave portion 95 when the core 90 is manufactured. For this reason, a gap d is formed between the convex portion 94 and the concave portion 95, and the magnetic flux φ may be difficult to pass.

  Further, since the size of the gap d varies with the manufacturing variation of the core 90, the ease of passing the magnetic flux φ is likely to vary. Therefore, there is a problem that the magnetic characteristics (inductance) of the magnetic component 9 are likely to vary.

  Further, since the conventional magnetic component 9 has the convex portion 94 formed at the center of the close contact surface 93, the convex portion 94 tends to become an obstacle when polishing the close contact surface 93, and it is difficult to perform the polishing operation. Furthermore, since the surface of the convex part 94 and the surface of the concave part 95 have to be polished in addition to the close contact surface 93, there is a problem that it takes time for polishing work and it is difficult to manufacture the core.

  The present invention has been made in view of such a background, and an object of the present invention is to provide a magnetic component capable of easily manufacturing a core and suppressing variation in magnetic characteristics.

One embodiment of the present invention includes an electromagnetic coil;
Comprising two cores, a first core and a second core, made of a magnetic material;
Each of the cores has a polished contact surface, and the two cores are combined in close contact with each other at the contact surface, and a coil housing space formed between the two cores. The electromagnetic coil is housed,
The magnetic flux generated by energizing the electromagnetic coil is configured to pass through the close contact surface through the core,
A pair of protrusions for preventing relative displacement of the two cores combined is formed at the periphery of the close contact surface of the first core so as to protrude in the normal direction of the close contact surface. And
A space is formed on the protruding side of the protrusion in the normal direction with respect to the end surface of the protrusion ,
The first core includes a plate-like first main body portion, and the pair of protrusions are formed to extend along mutually parallel sides of the first main body portion, Of the surface on the second core side, the close contact surface is formed on a portion excluding the pair of protrusions,
The second core includes a plate-like second main body, a pair of pillars protruding from the second main body in the normal direction, and a pair of pillars protruding from the second main body in the normal direction. A center pole interposed between the portions, the tip surfaces of the pair of column portions and the center pole are the close contact surfaces,
The space is formed between the protrusion and the second main body, and the electromagnetic coil is interposed in the space.
The pair of protrusions are located between the pair of pillars, and the side surfaces of the protrusions abut against the side surfaces of the pair of pillars, whereby the two protrusions are arranged in the arrangement direction of the pair of pillars. The center pole is configured to prevent the relative displacement of the core, and the center pole is positioned between the pair of protrusions, and the pair of protrusions abuts the center pole so that the normal direction and the arrangement direction are The magnetic component is configured to prevent relative displacement between the two cores in the width direction orthogonal to both of the two (Claim 1).

In the magnetic component, a space is formed on the protruding side of the protrusion in the normal direction with respect to the end surface of the protrusion.
If it does in this way, since the said space has a magnetic resistance larger than the magnetic body which comprises a core, magnetic flux will not pass the said space, but will mainly pass the said close surface. That is, the magnetic flux is prevented from passing through the protrusion by the space. Therefore, the magnetic characteristics of the magnetic component are almost determined by the area of the close contact surface and are not affected by the shape of the protrusion. Therefore, even if the shape of the protrusion varies during the manufacture of the core, the magnetic characteristics of the magnetic parts are less likely to vary.

Further, in the magnetic component, since the protrusion is formed in the peripheral portion of the close contact surface, the protrusion is unlikely to become an obstacle when the close contact surface is polished. Therefore, it is possible to easily perform the polishing work on the close contact surface.
Further, as described above, since magnetic flux does not pass through the protrusion, the magnetic characteristics are not affected even if the end face of the protrusion is not polished.
As described above, in the magnetic component, since the close contact surface can be easily polished, and the end surface of the protrusion need not be polished, the core can be easily manufactured.

  As described above, according to this example, it is possible to provide a magnetic component that is easy to manufacture a core and can suppress variations in magnetic characteristics.

The disassembled perspective view of the magnetic component in the reference example 1. FIG. The back view of the core shown in FIG. The perspective view of the magnetic component in the reference example 1. FIG. FIG. 4 is a view as seen from the direction of arrow A in FIG. BB sectional drawing of FIG. The perspective view of the core in the reference example 2. FIG. It is CC sectional drawing in the assembled state of the core shown in FIG. 6, Comprising: The thing drawn with the electromagnetic coil. The perspective view of the core in the reference example 3. FIG. The perspective view of the core in the reference example 4. FIG. The perspective view of the core in Example 1. FIG. It is DD sectional drawing in the assembled state of the core shown in FIG. 10, Comprising: What was drawn with the electromagnetic coil. It is EE sectional drawing in the assembled state of the core shown in FIG. 10, Comprising: The thing drawn with the electromagnetic coil. The perspective view of the core in the reference example 5. FIG. The perspective view in the assembled state of the core shown in FIG. The perspective view of the core in the reference example 6. FIG. It is FF sectional drawing in the assembled state of the core shown in FIG. 15, Comprising: The thing drawn with the electromagnetic coil. The perspective view of the core in the reference example 7. FIG. The G arrow line view of FIG. The disassembled perspective view of the core of a magnetic component in a prior art example. The HH sectional view in the state where the core shown in Drawing 19 was assembled.

With respect to the end face, the projecting side of the projecting portion in the normal direction, it is not preferable that the mating of the core are combined in a core provided with the projecting portion is configured so as not to exist.
In this case, in the normal direction, since the counterpart core does not exist at a position close to the end face of the protrusion, it is easier to prevent magnetic flux from passing through the protrusion.

Further, in the magnetic component, the projecting side of the projecting part in the normal direction with respect to the end surface is spaced by a predetermined distance from the core on the other side combined with the core provided with the projecting part. some are arranged, the electromagnetic coil between the end surface and the other side of the core that intervene.
For this reason , a space large enough to allow the electromagnetic coil to intervene is secured between the end face of the protrusion and the counterpart core, and this space sufficiently suppresses the magnetic flux from passing through the protrusion. be able to. Therefore, even if the shape of the protrusion varies during manufacturing, the variation in magnetic characteristics of the magnetic component can be reduced.

The magnetic component includes two cores combined with each other, and one of the two cores is formed with a pair of pillars, and a tip surface of the pillar is the close contact surface. The other core is formed with the protrusion, the protrusion is positioned between the pair of pillars, and the side surfaces of the protrusions are in contact with the side surfaces of the pair of pillars. Accordingly, in the arrangement direction of the pair of column portions, that is configured to prevent the relative displacement of the two cores.
Therefore , the relative position shift of the two cores in the arrangement direction can be prevented by the pair of pillars and the protrusions.

The magnetic component includes two cores having the same three-dimensional shape, which are combined with each other, and each of the cores includes the close contact surface, the protrusion, and a cover engaged with the protrusion. Each of the cores is in close contact with each other, the protrusion of one of the cores is engaged with the engaged portion of the other core, and it is not preferable that the projection is engaged with the engaged portion of one of said core.
In this case, since the two cores have the same three-dimensional shape, it is not necessary to produce a plurality of types of cores when obtaining a magnetic component. Therefore, it is possible to reduce the manufacturing cost of the magnetic component.

( Reference Example 1)
A reference example related to the magnetic component of this example will be described with reference to FIGS. As shown in FIGS. 1 and 3, the magnetic component 1 of this example includes an electromagnetic coil 2 and two cores 3 (a first core 3 a and a second core 3 b) made of a magnetic material.
Each core 3 has a polished close contact surface 31. The two cores 3 are combined in close contact with each other on the close contact surface 31. The electromagnetic coil 2 is housed in a coil housing space 30 formed between the two cores 3.
As shown in FIG. 5, when a current is passed through the electromagnetic coil 2, a magnetic flux φ is generated around the electromagnetic coil 2. This magnetic flux φ passes through the core 3 and passes through the close contact surface 31.

Moreover, as shown in FIG. 2, the protrusion 4 for preventing the relative displacement of the two combined cores 3 is provided in one of the two cores 3a and 3b (first core 3a). It is formed on the periphery of the close contact surface 31 so as to protrude in the normal direction (Z direction) of the close contact surface 31.
As shown in FIG. 4, a space S is formed on the protruding side of the protrusion 4 in the Z direction with respect to the end surface 40 of the protrusion 4.

  The magnetic component 1 of this example can be used, for example, as a choke coil for constituting a power converter. The cores 3a and 3b in this example are made of ferrite. The cores 3a and 3b are manufactured by putting ferrite fine particles in a mold (not shown) and then sintering.

  As shown in FIG. 2, the first core 3 a includes a rectangular plate-shaped main body 32. The main surface of the main body 32 is polished to form the close contact surface 31. A pair of protrusions 4 are formed at both ends of the close contact surface 31 in a direction (X direction) parallel to the short sides 321 and 322 of the bottom surface of the main body portion 32. The protrusion 4 protrudes in the normal direction (Z direction) of the close contact surface 31. The protrusion 4 extends over the entire length of the main body 32 in a direction (Y direction) parallel to the long sides 323 and 324 of the bottom surface of the main body 32.

  Moreover, as shown in FIG. 1, the 2nd core 3b is also provided with the rectangular-plate-shaped main-body part 33 similarly to the 1st core 3a. A pair of column parts 5 (5a, 5b) is erected from both ends of the main body part 33 in a direction (Y direction) parallel to the long sides 333 and 334 of the bottom surface of the main body part 33. The column portion 5 extends in a direction (X direction) parallel to the short sides 331 and 334 of the bottom surface of the main body portion 33.

  A cylindrical center pole 6 is formed between the pair of column portions 5a and 5b. A space between the column portions 5 a and 5 b and the center pole 6 is a coil housing space 30 for housing the electromagnetic coil 2. The inner surfaces 50 of the column portions 5 a and 5 b are formed in an arc shape having a radius slightly larger than the outer diameter of the electromagnetic coil 2. The front end surfaces of the column portion 5 and the center pole 6 are polished to form the close contact surface 31.

  The electromagnetic coil 2 comprises a bus bar. The electromagnetic coil 2 includes an annular part 20 and a connection part 21 protruding from the annular part 20 in the X direction. When the electromagnetic coil 2 is housed in the coil housing space 30, the center pole 6 is fitted into a circular through hole 22 formed at the center of the annular portion 20.

  As shown in FIGS. 1 and 3, the two cores 3 a and 3 b are combined while the electromagnetic coil 2 is housed in the coil housing space 30. When the cores 3a and 3b are combined, the close contact surface 31 formed on the first core 3a and the close contact surface 31 formed on the second core 3b are in close contact with each other. In this manner, the close contact surfaces 31 are brought into close contact with each other, thereby preventing a minute gap from being formed between the two cores 3a and 3b. Thereby, the magnetic resistance in the close contact surface 31 is reduced, and the magnetic flux φ (see FIG. 5) can easily pass through the close contact surface 31.

  The close contact surface 31 has a smaller surface roughness (Rz) than other surfaces. The surface roughness (Rz) of the close contact surface 31 is, for example, 6.3 (μm) or less.

  Further, when the two cores 3a and 3b are combined, the pair of protrusions 4 formed on the first core 3a are arranged at positions sandwiching the pillars 5 formed on the second core 3b from both sides in the X direction. . In this way, by sandwiching the column part 5 from the X direction by the pair of protrusions 4, the relative displacement of the two cores 3a and 3b in the X direction is prevented.

  In addition, when a force that rotates the first core 3 a about the axis 69 (see FIG. 3) of the center pole 6 acts, the projecting portion 4 comes into contact with the column portion 5. Therefore, the first core 3a does not rotate around the axis 69 with respect to the second core 3b.

  In addition, after combining the two cores 3a and 3b, as shown in FIG. 3, a pair of holder 8 is attached. The pair of holders 8 sandwich the two cores 3a and 3b in the Z direction at the short sides 321 and 322 of the first core 3a. This prevents the cores 3a and 3b from separating in the Z direction.

As shown in FIG. 4, a space S is formed on the projecting side of the projection 4 in the Z direction with respect to the end surface 40 of the projection 4. Since the space S has a larger magnetic resistance than the magnetic body constituting the core 3, the magnetic flux φ hardly passes through the space S. Therefore, the magnetic flux φ is difficult to pass through the protrusion 4.
Moreover, in this example, the other side core 3 (2nd core) combined with the core 3 (1st core 3a) which provided the protrusion 4 is provided in the protrusion side of the protrusion 4 in a Z direction with respect to the end surface 40. 3b) does not exist.

The effect of this example will be described. As shown in FIG. 4, in this example, a space S is formed on the protruding side of the protrusion 4 in the Z direction with respect to the end surface 40 of the protrusion 4.
In this way, the magnetic flux φ does not pass through the space S but mainly passes through the close contact surface 31 because the space S has a larger magnetic resistance than the magnetic body constituting the core 3. That is, the space S suppresses the magnetic flux φ from passing through the protrusion 4. Therefore, the magnetic characteristics of the magnetic component 1 are almost determined by the area of the close contact surface 31 and are not affected by the shape of the protrusion 4. Therefore, even if the shape of the protrusion 4 varies during the manufacture of the core 3, the magnetic characteristics of the magnetic component 1 are unlikely to vary.

  Since the core 3 of this example is formed by molding and firing ferrite fine particles, it is easy to form minute irregularities on the entire surface, and minute irregularities are also likely to be formed on the surface of the protrusion 4. Therefore, the effect of suppressing variation in magnetic characteristics is particularly great when the space S is formed as described above and the magnetic flux φ is difficult to pass through the protrusion 4.

In addition, as shown in FIG. 2, in this example, since the protrusion 4 is formed in the peripheral portion of the close contact surface 31 of the core 3, the protruded portion 4 is not easily obstructed when the close contact surface 31 is polished. Therefore, the work of polishing the close contact surface 31 can be easily performed.
In particular, in this example, since the protrusions 4 are not formed on the short sides 311 and 312 of the close contact surface 31 having a rectangular shape, when the close contact surface 31 is polished using a polishing member (not shown), the short side 311 is removed. , 312 is not in the vicinity of the polishing member. Therefore, it is possible to easily polish the close contact surface 31 while moving the polishing member in the Y direction.

Further, as described above, since the magnetic flux φ does not pass through the protrusion 4, the magnetic characteristics are not affected even if the end surface 40 of the protrusion 4 is not polished.
Thus, in this example, the close contact surface 31 can be easily polished, and the end surface 40 of the protrusion 4 does not need to be polished. Therefore, the core 3 can be easily manufactured.

Moreover, in this example, as shown in FIG. 4, the core 3 of the other party combined with the core 3 (1st core 3a) which formed the protrusion 4 in the protrusion side of the protrusion 4 in a Z direction with respect to the end surface 40. The (second core 3b) is configured not to exist.
If it does in this way, since the 2nd core 3b does not exist in the position close | similar to the end surface 40 in a Z direction, it is easier to prevent magnetic flux (phi) passing the protrusion part 4. FIG.

  In this example, as shown in FIG. 1, only one electromagnetic coil 2 is accommodated in the coil accommodating space 30 and the magnetic component 1 is used as a choke coil. However, a plurality of electromagnetic coils 2 are accommodated in a transformer. It may be used as

  As described above, according to this example, it is possible to provide a magnetic component that is easy to manufacture a core and can suppress variations in magnetic characteristics.

( Reference Example 2)
In this example, the shape of the first core 3a is changed. As shown in FIG. 6, in this example, a pair of protrusions 4 protruding in the Z direction are formed at both ends in the Y direction of the first core 3a. The protrusion 4 extends over the entire length of the first core 3a in the X direction. Further, the second core 3b has the same three-dimensional shape as that of the reference example 1.

When the two cores 3a and 3b are combined, as shown in FIG. 7, the protrusions 4 are positioned on the outer side in the Y direction with respect to the column portions 5a and 5b formed on the second core 3b. As described above, the pair of protrusions 4 sandwich the pillars 5a and 5b in the Y direction, thereby preventing the relative displacement of the two cores 3a and 3b in the Y direction.
In addition, the same configuration as the reference example 1 is provided.

The effect of this example will be described. With the above configuration, it is possible to effectively prevent the relative displacement between the two cores 3a and 3b in the Y direction.
In addition, the same effects as those of Reference Example 1 are obtained.

( Reference Example 3)
In this example, the shape of the second core 3b is changed. As shown in FIG. 8, the second core 3 b of the present example has a rectangular plate-like main body portion 33 as in the first reference example. A pair of column portions 5a and 5b are erected from both end portions of the main body portion 33 in the Y direction. A center pole 6 is formed between the pair of column portions 5a and 5b. The column part 5 and the center pole 6 of this example present a rectangular parallelepiped. The electromagnetic coil 2 (not shown) of this example is formed in a quadrangular ring shape. The center pole 6 is fitted to the center of the rectangular annular electromagnetic coil 2.

The cores 3a and 3b in this example are made of ferrite. When manufacturing the cores 3a and 3b, similarly to the first embodiment, ferrite fine particles are put in a mold (not shown) and molded, and then sintered.
In addition, the same configuration as the reference example 1 is provided.

The effect of this example will be described. When the inner surface 50 of the column portion 5 is curved (see FIG. 1), the mold can be pulled out only in the Z direction. However, in this example, the column portion 5 has a rectangular parallelepiped shape, and thus the second core 3b is manufactured. In doing so, the mold can be removed from either the Z direction or the X direction. Therefore, the freedom degree in the manufacturing process of the 2nd core 3b increases, and it becomes easy to manufacture the 2nd core 3b.
In addition, the same effects as those of Reference Example 1 are obtained.

( Reference Example 4)
In this example, the shape of the second core 3b is changed. As shown in FIG. 9, the second core 3 b of this example includes a rectangular plate-shaped main body portion 33 as in the first reference example. A pair of column portions 5a and 5b is erected from both ends of the main body portion 33 in the Y direction. The front end surfaces of the column portions 5 a and 5 b are polished to form a close contact surface 31. The center pole 6 is not provided between the column parts 5a and 5b.

A flexible flat cable 2a (electromagnetic coil 2) is accommodated in the coil accommodating space 30, and a magnetic flux φ generated by energizing the flat cable 2a (electromagnetic coil 2) is configured to pass through the core 3. Can do. In this example, since the center pole 6 is not formed on the second core 3b, when the flat cable 2a (electromagnetic coil 2) is accommodated, the center pole 6 does not get in the way.
Incidentally, the second core 3b of the present embodiment, the first core 3a as in Reference Example 1 or of the first core 3a as in Reference Example 2, can be combined either.
In addition, the configuration and operational effects are the same as those of Reference Example 1.

(Example 1 )
In this example, the shape of the first core 3a is changed. As shown in FIG. 10, the first core 3 a of this example includes a rectangular plate-like main body 32, as in the first reference example. A pair of protrusions 4 are formed at both ends of the main body 32 in the X direction. Of the main surface of the main body 32, the portion other than the protrusion 4 is polished to form a close contact surface 31. The protrusion 4 protrudes in the Z direction and extends in the Y direction. The protrusion 4 is formed not in the entire length of the main body 32 but only in a part in the Y direction. For this reason, the outer surface of both ends 49 of the protrusion 4 in the Y direction is a close contact surface 31.

The second core 3b has the same shape as the reference example 1. When the two cores 3a and 3b are combined, the contact surfaces 31 formed on the respective cores 3a and 3b come into close contact with each other. Moreover, as shown in FIG. 12, a pair of protrusion part 4 formed in the 1st core 3a fits between a pair of pillar part 5a, 5b.
When the two cores 3a and 3b are combined, the center pole 6 is fitted between the pair of protrusions 4 as shown in FIG.

As shown in FIG. 11, the main body 33 of the second core 3 b is located at a predetermined interval on the projecting side of the projecting part 4 in the Z direction with respect to the end surface 40 of the projecting part 4. A space S is formed between the main body 33 and the end surface 40. And in this space S, the electromagnetic coil 2 is arrange | positioned.
In addition, the same configuration as the reference example 1 is provided.

  The effect of this example will be described. In this example, when a force is applied to one of the two cores 3a and 3b in the arrangement direction (Y direction) of the column portions 5a and 5b, the side surface of the protrusion 4 is the side surface of the column portions 5a and 5b. Abut. Therefore, it is possible to prevent relative displacement between the two cores 3a and 3b in the Y direction.

  Further, when a force is applied to either one of the two cores 3 a and 3 b in the X direction, the side surface of the protrusion 4 comes into contact with the side surface of the center pole 6. Therefore, it is possible to prevent relative displacement between the two cores 3a and 3b in the X direction.

  Further, when a force for rotating about one of the two cores 3a and 3b around the axis 69 (see FIG. 10) of the center pole 6 is applied, the side surface of the projecting portion 4 becomes the side of the column portions 5a and 5b. Abuts the side. Therefore, the cores 3a and 3b can be prevented from rotating around the axis 69.

Moreover, in this example, since the protrusion 4 is located between the pair of pillars 5a and 5b, the length of the first core 3a in the X direction can be shortened compared to the reference example 1. it can. Thereby, the volume of the 1st core 3a can be made small, and it becomes possible to manufacture the 1st core 3a with few magnetic materials. Therefore, the manufacturing cost of the magnetic component 1 can be reduced.

  In this example, as shown in FIG. 11, a space S large enough to arrange the electromagnetic coil 2 is secured between the main body portion 33 of the second core 3 b and the end surface 40. Therefore, the space S can sufficiently suppress the magnetic flux φ from passing through the protrusion 4. Therefore, even if the shape of the protrusion 4 varies during manufacturing, variations in the magnetic characteristics of the magnetic component 1 can be reduced.

( Reference Example 5 )
In this example, the shapes of the cores 3a and 3b are changed. As shown in FIG. 13, in this example, two cores 3a and 3b having the same three-dimensional shape are provided. Each core 3 includes a close contact surface 31, a protrusion 4, and an engaged portion 7 that engages with the protrusion 4.
That is, of the pair of column portions 5a and 5b formed on each core 3, one column portion 5a has a first protrusion 4a formed at one end in the X direction and a first engaged portion at the other end. 7a is formed. Moreover, the 2nd to-be-engaged part 7b is formed in the one end in the X direction of the other pillar part 5b, and the 2nd protrusion 4b is formed in the other end. The protrusions 4a and 4b are formed in a triangular prism shape. Further, the engaged portions 7a and 7b have shapes in which the corners of the column portions 5a and 5b are cut out obliquely.

  In a state where the two cores 3a and 3b are combined, the close contact surfaces 31 of the respective cores 3 are in close contact with each other. Then, the protrusion 4 of one core 3a (first core 3a) is engaged with the engaged portion 7 of the other core 3b (second core 3b), and the protrusion of the other core 3 (second core 3b). The part 4 engages with the engaged part 7 of one core 3 (first core 3a).

That is, the first protrusion 4a of the first core 3a is engaged with the first engaged portion 7a of the second core 3b. Further, as shown in FIG. 14, the first protrusion 4a of the second core 3b engages with the first engaged portion 7a of the first core 3a. Furthermore, the second protrusion 4b of the first core 3a engages with the second engaged portion 7b of the second core 3b. Further, the second protrusion 4b of the second core 3b is engaged with the second engaged portion 7b of the first core 3a.
In addition, the same configuration as the reference example 1 is provided.

The effect of this example will be described. In this example, since two cores 3a and 3b having the same three-dimensional shape are used, it is not necessary to manufacture a plurality of types of cores 3 in obtaining the magnetic component 1. Therefore, the manufacturing cost of the magnetic component 1 can be reduced.
In addition, the same effects as those of Reference Example 1 are obtained.

( Reference Example 6 )
In this example, the shapes of the cores 3a and 3b are changed. As shown in FIGS. 15 and 16, the magnetic component 1 of this example includes two cores 3 a and 3 b that are combined with each other and have the same three-dimensional shape. Each core 3 includes rectangular plate-like main body portions 32 and 33, a pair of column portions 5a and 5b formed at both ends in the Y direction of the main body portions 32 and 33, and the pair of column portions 5a and 5b. And a center pole 6 formed between the two. The center pole 6 and the pair of column portions 5a and 5b have a rectangular parallelepiped shape. The tip surfaces of the center pole 6 and the column portion 5 are polished to form a close contact surface 31.

  Further, the protrusion 4 is formed at the outer end in the Y direction of one of the pillars 5a and 5b. The protrusion 4 protrudes in the Z direction and extends in the X direction. Moreover, the outer side edge part of the other pillar part 5b in the Y direction becomes the engaged part 7 with which the protrusion part 4 of the mating core 3 is engaged.

When the two cores 3a and 3b are combined, as shown in FIG. 16, the protrusion 4 of the first core 3a is engaged with the engaged portion 7 of the second core 3b, and the protrusion 4 of the second core 3b is Engage with the engaged portion 7 of the first core.
In addition, the same configuration as the reference example 1 is provided.

The effect of this example will be described. In this example, since the two cores 3a and 3b have the same three-dimensional shape like the reference example 5 , the mold for manufacturing these cores 3a and 3b can be made into one kind. Therefore, the manufacturing cost of the cores 3a and 3b can be reduced.

Moreover, in this example, since pillar part 5a, 5b exhibits a rectangular parallelepiped, when manufacturing core 3a, 3b, a metal mold | die can be extracted from any of a Z direction and an X direction. Thereby, it becomes possible to raise the freedom degree at the time of manufacture of the core 3. FIG.
In addition, the same effects as those of Reference Example 1 are obtained.

( Reference Example 7 )
In this example, the shape and number of the cores 3 are changed. As shown in FIG. 17, in this example, three cores 3a to 3c are combined. The first core 3 a has a rectangular plate-shaped main body 32. The main surface of the main body 32 is polished to form a close contact surface 31. A pair of protrusions 4 protrude from both ends of the main body 32 in the X direction. The protrusion 4 protrudes in the Z direction and extends in the Y direction.

  The second core 3b also includes a rectangular plate-shaped main body portion 33. A column portion 5 is formed at an outer end portion of the main body portion 33 in the Y direction. The column portion 5 protrudes in the Z direction, and the tip end surface of the column portion 5 is polished to form a close contact surface 31. A center pole 6 is formed at the inner end of the main body 33 in the Y direction. The center pole 6 protrudes in the same direction as the column part 5. The length of the center pole 6 in the Z direction is shorter than the length of the column part 5 in the Z direction. Further, the tip surface 60 of the center pole 6 is not in contact with the contact surface 31 of the first core 3 a, and a gap D is formed between the tip surface 60 and the contact surface 31. This gap D prevents the core 3 from being magnetically saturated.

The third core 3c has the same three-dimensional shape as the second core 3b. The contact surfaces 31 of the second core 3b and the third core 3c are in close contact with both end portions in the Y direction of the contact surface 31 of the first core 3a.
In addition, the configuration and operational effects are the same as those of Reference Example 1.

DESCRIPTION OF SYMBOLS 1 Magnetic component 2 Electromagnetic coil 3 Core 30 Coil accommodation space 31 Close contact surface 4 Protrusion 40 End surface S Space φ Magnetic flux

Claims (1)

An electromagnetic coil;
Comprising two cores, a first core and a second core, made of a magnetic material;
Each of the cores has a polished contact surface, and the two cores are combined in close contact with each other at the contact surface, and a coil housing space formed between the two cores. The electromagnetic coil is housed,
The magnetic flux generated by energizing the electromagnetic coil is configured to pass through the close contact surface through the core,
A pair of protrusions for preventing relative displacement of the two cores combined is formed at the periphery of the close contact surface of the first core so as to protrude in the normal direction of the close contact surface. And
A space is formed on the protruding side of the protrusion in the normal direction with respect to the end surface of the protrusion ,
The first core includes a plate-like first main body portion, and the pair of protrusions are formed to extend along mutually parallel sides of the first main body portion, Of the surface on the second core side, the close contact surface is formed on a portion excluding the pair of protrusions,
The second core includes a plate-like second main body, a pair of pillars protruding from the second main body in the normal direction, and a pair of pillars protruding from the second main body in the normal direction. A center pole interposed between the portions, the tip surfaces of the pair of column portions and the center pole are the close contact surfaces,
The space is formed between the protrusion and the second main body, and the electromagnetic coil is interposed in the space.
The pair of protrusions are located between the pair of pillars, and the side surfaces of the protrusions abut against the side surfaces of the pair of pillars, whereby the two protrusions are arranged in the arrangement direction of the pair of pillars. The center pole is configured to prevent the relative displacement of the core, and the center pole is positioned between the pair of protrusions, and the pair of protrusions abuts the center pole so that the normal direction and the arrangement direction are A magnetic component configured to prevent relative displacement between the two cores in a width direction orthogonal to both of the two .

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