JP2018078167A - Fixture and noise current absorber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fixture which allows easy attachment/detachment of a magnetic core while preventing degradation in electrical characteristics of the magnetic core.SOLUTION: Provided is a fixture for fixing an annular magnetic core to a flat surface parallel to the central axis of the magnetic core. The fixture comprises: a pair of lateral walls which face each other with the magnetic core interposed in its central axis direction; and a support part, arranged between the pair of lateral walls, which comes into contact with an outer peripheral surface of the magnetic core. The pair of lateral walls each comprise: a recessed part which is recessed in the direction separating from the flat surface so as to divide a bottom surface making contact with the flat surface; and a groove formed on a surface on a side opposite to the surface facing the magnetic core of the lateral walls. When viewed in the central axis direction of the magnetic core, the groove is formed at a position overlapping a virtual straight line connecting an inner hole of the magnetic core to the recessed part.SELECTED DRAWING: Figure 1

Description

  The present disclosure relates to a fixture.

  As a component that absorbs the noise current flowing in the wire, the wire is wound so as to alternately contact the outer peripheral surface and inner hole of an annular magnetic core (so-called magnetic core) having through holes (that is, inner holes), and noise is generated by the magnetic core. Noise current absorbers that absorb current are known.

As a means for fixing such a noise current absorber to a housing or the like, a method is known in which a screw hole is provided in a case containing a magnetic core and the case is fixed by fastening a screw (see Patent Document 1).
Also known is a method of fixing a magnetic core to a pedestal by spanning a belt-like fastener around the outer peripheral surface of the magnetic core in the circumferential direction (see Patent Document 2).

JP-A-10-74631 JP 2009-10255 A

  In the noise current absorber, it is necessary to perform maintenance and replacement of the magnetic core. However, when the case containing the magnetic core is fixed with a screw as in Patent Document 1, it is necessary to remove the screw and remove the magnetic core from the case. The work must be complicated. Further, there are cases where a plurality of magnetic cores are continuously arranged in the direction of the central axis. In such a case, the workability of taking out the magnetic core is further reduced.

  On the other hand, in the structure of patent document 2, a magnetic core can be taken out by cut | disconnecting a fastener. However, when the fastener is bridged on the outer peripheral surface of the magnetic core, the electrical characteristics of the magnetic core may be reduced due to the fastening force of the fastener.

  One aspect of the present disclosure is to provide a fixture that can be easily detached while preventing deterioration of the electrical characteristics of the magnetic core.

  One aspect of the present disclosure is a fixture that fixes an annular magnetic core on a plane parallel to a central axis thereof. The fixture includes a pair of side walls opposed to each other with the magnetic core sandwiched in the direction of the central axis, and a support portion disposed between the pair of side walls and contacting the outer peripheral surface of the magnetic core. Each of the pair of side walls includes a recess that is recessed in a direction away from the plane so as to divide the bottom surface that abuts the plane, and a groove that is formed on a surface opposite to the surface facing the magnetic core of the side wall. The groove is formed at a position overlapping with an imaginary straight line connecting the inner hole of the magnetic core and the concave portion when viewed from the central axis direction of the magnetic core.

  According to such a configuration, the magnetic core can be bound to the fixing tool by bringing the outer peripheral surface of the magnetic core into contact with the support portion and spanning the binding band over the fixing tool so as to pass through the inner hole of the magnetic core. Therefore, even after fixing the fixture to a flat surface, the magnetic core can be easily detached from the fixture by cutting the binding band. In addition, by spanning the binding band in the direction of the central axis of the magnetic core, it is possible to prevent a decrease in the electrical characteristics of the magnetic core due to the tightening force. Further, since the binding band is housed in the groove, a plurality of fixtures can be connected without gaps in the direction of the central axis of the magnetic core.

  In one embodiment of the present disclosure, at least one of the pair of side walls may have a step that widens from the inner hole side of the magnetic core toward the concave portion side. According to such a configuration, when the band head of the binding band is accommodated in the widened region formed by the step, the outer surface of the band head is caught by the step when the tension in the direction toward the magnetic core is applied to the binding band. Abut. As a result, since the stress applied to the band coupling portion (that is, the band insertion path) of the band head is reduced, the resistance of the band coupling portion can be increased.

  In one aspect of the present disclosure, the support portion may be configured such that the position where the magnetic core abuts changes according to the thickness of the magnetic core in the central axis direction. According to such a configuration, it becomes easy to apply the same fixture to magnetic cores having different sizes.

In one embodiment of the present disclosure, the pair of side walls may have a hole penetrating in the direction of the central axis of the magnetic core. According to such a configuration, the fixture can be easily connected in the direction of the central axis of the magnetic core.
Another aspect of the present disclosure is a noise current absorber including at least one fixture, an annular magnetic core, and a binding band that binds the fixture and the magnetic core. The outer peripheral surface of the magnetic core is in contact with the support portion of the fixture. The binding band is spanned over the inner hole of the magnetic core and the outer surface and the concave portion of the pair of side walls while being accommodated in the groove.

  According to such a configuration, the magnetic core can be easily detached from the fixture by cutting the binding band. Furthermore, the presence of the groove for storing the binding band can minimize the portion where the binding band presses the magnetic core, and thus can prevent deterioration of the electrical characteristics of the magnetic core. Further, since the binding band is housed in the groove, a plurality of noise current absorbers can be connected without gaps in the direction of the central axis of the magnetic core.

FIG. 1 is a schematic perspective view of a fixture according to an embodiment. 2A is a schematic front view of the fixture of FIG. 1, FIG. 2B is a schematic side view of the fixture of FIG. 1, FIG. 2C is a schematic plan view of the fixture of FIG. FIG. 2 is a schematic bottom view of the fixture of FIG. 1. 3A to 3C are schematic cross-sectional views showing the positional relationship between the fixture of the embodiment and magnetic cores having different sizes. FIG. 4 is a schematic side view of the noise current absorber of the embodiment. FIG. 5 is a schematic perspective view showing a state in which the noise current absorbers of a plurality of embodiments are connected.

Hereinafter, embodiments to which the present disclosure is applied will be described with reference to the drawings.
[1. First Embodiment]
[1-1. Constitution]
The fixing tool 1 shown in FIGS. 1 and 2 fixes an annular magnetic core on a plane parallel to its central axis. The constituent material of the fixture 1 is not particularly limited, but can be formed of resin or metal.

  The fixture 1 is erected on a plane for fixing the magnetic core (hereinafter also referred to as “fixed plane”), and a pair of side walls 2A and 2B and a pair of side walls 2A facing each other with the magnetic core sandwiched in the central axis direction. , 2B, and a support portion 3 that contacts the outer peripheral surface of the magnetic core.

(Side wall)
The pair of side walls 2A and 2B are plate-like members each having a certain thickness. The pair of side walls 2A and 2B are arranged so that the end surface in the central axis direction of the magnetic core to be fixed and the inner surface thereof face each other. The pair of side walls 2A and 2B has a role of restricting movement of the magnetic core in the direction of the central axis. Further, the planar shape of the pair of side walls 2A and 2B is a shape in which the Y shape is turned upside down with respect to the fixed plane (that is, the inverted Y shape).

  Specifically, the pair of side walls 2A and 2B are inner holes positioned closer to the inner hole side of the magnetic core than the bottom surface 21 of the bottom surface 21 contacting the fixed plane and the peripheral surfaces of the pair of side walls 2A and 2B. Each includes a proximity surface 22, a recess 23 that is recessed in a direction away from the fixed plane so as to divide the bottom surface 21, and a groove 24 that is formed on the outer surface of the side walls 2A and 2B. The “outer surface of the side walls 2A and 2B” means a surface opposite to the surface facing the magnetic core (that is, the surface facing the side walls 2A and 2B).

  The bottom surface 21 is divided into two front and rear regions by a recess 23. Here, “front” means the side on which the magnetic core contacts the fixture 1, and “rear” means the opposite side. As shown in FIG. 2D, the front bottom surfaces 21 are connected to each other by a front bottom wall 4. The rear bottom surfaces 21 are connected to each other by the rear bottom wall 5. The front bottom wall 4 and the rear bottom wall 5 are band-plate-like members whose surfaces abut on the fixed plane, respectively, and the longitudinal direction coincides with the opposing direction of the pair of side walls 2A and 2B. That is, the pair of side walls 2A, 2B, the front bottom wall 4 and the rear bottom wall 5 intersect each other at a substantially right angle.

  As shown in FIG. 2B, the recess 23 is a region that is recessed toward the direction away from the fixed plane at the center of the bottom surface 21 of the side walls 2A, 2B. There are no members such as walls or protrusions between the recesses 23 of the pair of side walls 2A and 2B. That is, the recessed part 23 becomes an opening part of the through-hole formed between the fixing plane when the fixture 1 is installed on the fixing plane. A binding band that binds the magnetic core and the fixture 1 is inserted into the through hole. In addition, one end of the groove 24 is provided in the recess 23, and as shown in FIG. 2D, the region including the groove 24 of the recess 23 is smaller in width than the other regions.

  The specific shape of the recess 23 will be described. In the recess 23, in the region included in the groove 24 (that is, overlapping with the groove 24), at least a part of the edge is the side surface of the groove 24 (that is, the longitudinal direction of the groove 24). It is a straight line. This facilitates the guide and fixing of the binding band. In addition, the shape of the edge in the other area | region of the recessed part 23 is not specifically limited, A straight line or a curve may be sufficient.

  As shown in FIG. 2B, the inner hole proximity surface 22 is a surface that faces the bottom surface 21 and is positioned closer to the inner hole side of the magnetic core than the bottom surface 21. The inner hole proximity surface 22 and the bottom surface 21 are connected by a rising surface 25 perpendicular to the fixed plane.

  In the present embodiment, the inner hole proximity surface 22 faces the central axis of the magnetic core to be fixed and extends along the circumferential direction C of the magnetic core. Furthermore, the inner hole proximity surface 22 is provided with one end of a groove 24. As shown in FIG. 2A, the region including the groove 24 of the inner hole proximity surface 22 has a smaller width than the other regions. The inner hole proximity surface 22 may be a smooth surface, or may be an uneven surface having a plurality of steps, for example.

  The groove 24 is configured to be able to store a binding band that binds the magnetic core and the fixture 1. Specifically, the groove 24 is formed in a belt shape that does not bend or curve. The groove 24 has one end formed in the inner hole proximity surface 22 and the other end formed in the recess 23. That is, as shown in FIG. 2B, the groove 24 is located at a position overlapping the virtual straight line I connecting the inner hole of the magnetic core and the recess 23 as viewed from the central axis direction of the magnetic core (the direction perpendicular to the paper surface in the drawing). It is formed in parallel with the virtual straight line I. Here, the virtual straight line I is a straight line connecting an arbitrary point included in the inner hole of the magnetic core and the concave portion 23 when viewed from the central axis direction of the magnetic core, and necessarily passes through the center of the inner hole of the magnetic core (that is, the central axis). There is no need. In this embodiment, the longitudinal direction of the groove 24 coincides with the normal line of the inner hole proximity surface 22. Therefore, the longitudinal direction of the groove 24 substantially coincides with the radial direction R of the magnetic core.

  Of the pair of side walls 2A and 2B, at least one of the grooves 24 has a step 24A that widens from the inner hole proximity surface 22 side (that is, the inner hole side of the magnetic core) toward the recess 23 side. Specifically, the groove 24 is formed with a constant first width from the inner hole proximity surface 22 to the step 24A, widens to a second width larger than the first width at the step 24A, and is formed from the step 24A to the recess 23. It is formed with two widths. The portion (that is, the widened portion) formed by the second width of the groove 24 constitutes a band head housing portion. The length of the band head storage portion is smaller than the distance from the end of the band head to the band insertion path of the binding band stored in the groove 24. Here, the band insertion passage is an opening for inserting the band-shaped portion of the binding band and fixing it in a ring shape. Accordingly, the depth of the groove 24 can be made constant while the band head is housed without protruding from the groove 24. The first width corresponds to the width of the band-shaped portion of the binding band, and the second width corresponds to the width of the band head of the binding band.

  The band head storage portion may be provided only on one of the pair of side walls 2A and 2B, or may be provided on both. By providing the band head storage portion on both of the pair of side walls 2A and 2B, the direction in which the binding band is bridged is not limited, so that the binding workability is improved.

  The pair of side walls 2A, 2B has an upper surface 26 and a side surface 27 in addition to the above-described surfaces. The upper surface 26 is a surface that is continuous from the end opposite to the bottom surface 21 of the inner hole proximity surface 22 and is parallel to the fixed plane. The side surface 27 is a surface that connects the upper surface 26 and the rear bottom surface 21.

  The pair of side walls 2 </ b> A and 2 </ b> B has a hole 6 penetrating in the direction of the central axis of the magnetic core on the opposite side of the support portion 3, that is, on the rear side of the back surface 31. By inserting bolts or the like into the holes 6, the plurality of fixtures 1 can be connected and fixed in the central axis direction P of the magnetic core.

(Support part)
The support portion 3 is a portion that supports the magnetic core by contacting the outer peripheral surface of the magnetic core and restricts the magnetic core from moving in the front-rear direction (that is, the direction perpendicular to the central axis and parallel to the fixed plane). As shown in FIG. 1, FIG. 2A and FIG. 2C, the support portion 3 includes a back surface 31, an inclined surface 32, a pair of first protrusion portions 33A and 33B, a pair of second protrusion portions 34A and 34B, and a pair of It has 3rd protrusion part 35A, 35B and a pair of 4th protrusion part 36A, 36B.

  The back surface 31 is a surface that is sandwiched between the pair of side walls 2A and 2B and extends in a direction perpendicular to the fixed plane. The back surface 31 is disposed at a central portion of the fixture 1 in the front-rear direction, that is, at a position overlapping the concave portion 23 in plan view.

  The inclined surface 32 is disposed on the fixed plane side with respect to the back surface 31 between the pair of side walls 2A and 2B. The inclined surface 32 is inclined forward as it goes from the back surface 31 side to the fixed plane side. The inclination of the inclined surface with respect to the fixed plane is substantially equal to the inclination of the tangent to the fixed plane at the center portion of the inner hole proximity surface 22 of the pair of side walls 2A and 2B.

  A pair of first protrusions 33A and 33B, a pair of second protrusions 34A and 34B, a pair of third protrusions 35A and 35B, and a pair of fourth protrusions 36A and 36B (hereinafter, these are summarized. (Also referred to as a “protrusion group”) projecting from the inner surfaces of the pair of side walls 2A and 2B and having surfaces that contact the outer peripheral surface of the magnetic core.

  Each protrusion included in the protrusion group is a plate-like body disposed on the inner surface of one of the pair of side walls 2A and 2B. Each projection has a side surface opposite to the fixed plane inclined with respect to the fixed plane, and the outer peripheral surface of the magnetic core abuts on the side surface.

  33 A of 1st protrusion parts are arrange | positioned in the area | region near the back surface 31 among the inner surfaces of one side wall 2A. A first protrusion 33B having an inverted shape of the first protrusion 33A is disposed at a position facing the first protrusion 33A on the other side wall 2B.

  The second projecting portion 34A is disposed in a front region, that is, a region close to the bottom surface 21 of the inner surface of the one side wall 2A. In other words, the second protrusion 34A is spaced from the first protrusion 33A in the circumferential direction C of the magnetic core. The second protrusion 34A has substantially the same thickness as the first protrusion 33A. A second protrusion 34B having an inverted shape of the second protrusion 34A is disposed at a position facing the second protrusion 34A of the other side wall 2B.

  The pair of third projecting portions 35A and 35B is disposed in a region shifted from the region in which the pair of first projecting portions 33A and 33B is disposed to the fixed plane side (that is, radially outside the magnetic core). The pair of third protrusions 35A and 35B is thicker than the pair of first protrusions 33A and 33B, respectively. That is, the pair of third protrusions 35A and 35B protrudes inside the pair of side walls 2A and 2B rather than the pair of first protrusions 33A and 33B.

  The pair of fourth protrusions 36A and 36B is disposed in a region shifted from the region in which the pair of second protrusions 34A and 34B is disposed to the fixed plane side. The pair of fourth protrusions 36A and 36B has substantially the same thickness as the pair of third protrusions 35A and 35B. That is, the pair of fourth protrusions 36A and 36B protrudes inside the pair of side walls 2A and 2B rather than the pair of second protrusions 34A and 34B.

  The support portion 3 is configured such that the position where the magnetic core abuts is changed according to the thickness in the central axis direction P of the magnetic core by the back surface 31, the inclined surface 32, and the protruding portion group. That is, when the thickness in the central axis direction P of the magnetic core is larger than the distance between the pair of first protrusions 33A and 33B and the distance between the pair of second protrusions 34A and 34B, as shown in FIG. The outer peripheral surface comes into contact with these protrusions. On the other hand, the thickness of the magnetic core in the central axis direction P is smaller than the distance between the pair of first protrusions 33A and 33B and the distance between the pair of second protrusions 34A and 34B, and a pair of third protrusions 35A. , 35B and the distance between the pair of fourth protrusions 36A, 36B are larger than the distance between the pair of third protrusions 35A, 35B and the pair of fourth protrusions 36A, 36B, as shown in FIG. 3B. Abuts against the protrusions 36A and 36B. Furthermore, if the thickness of the magnetic core in the central axis direction P is smaller than the distance between the pair of third protrusions 35A and 35B and the distance between the pair of fourth protrusions 36A and 36B, as shown in FIG. The outer peripheral surface abuts on the back surface 31 and the inclined surface 32 and does not abut on the protruding portion group. Thus, the contact positions in the radial direction R and the circumferential direction C between the support portion 3 and the magnetic core 11 change in accordance with the thickness of the magnetic core 11.

(Other configurations)
The fixing tool 1 has a hole 7 through which a bolt for fixing the fixing tool 1 to a fixing plane is inserted in the rear bottom wall 5. When the fixture 1 is made of resin, the durability of the hole 7 can be improved by attaching a metal collar to the hole 7.

[1-2. how to use]
Next, a method for using the fixture 1 will be described. As shown in FIG. 4, the magnetic core 11 fixed by the fixture 1 is obtained by covering a magnetic body with an annular resin case. Examples of the magnetic body include a strip, a green compact, and a sintered body made of amorphous metal or ferrite as a raw material.

  First, the magnetic core is inserted between the pair of side walls 2A and 2B so that the opposing direction of the pair of side walls 2A and 2B of the fixture 1 and the central axis direction of the magnetic core 11 coincide with each other. The outer peripheral surface of is contacted.

  Next, the binding band 12 is inserted into the inner hole of the magnetic core 11, and is further bridged to the outer surface of the pair of side walls 2A and 2B and the recess 23, and the belt-like portion 12A that has made one round is inserted into the band insertion passage 12C of the band head 12B. By doing so, the binding band 12 is fixed in a ring shape. At this time, the binding band 12 is accommodated in the groove 24 of the pair of side walls 2A and 2B. Accordingly, the binding band 12 is fixed in parallel with the virtual straight line I on the pair of side walls 2A and 2B. The band head 12 </ b> B is housed in a band head housing portion defined by the step 24 </ b> A of the groove 24. The material of the binding band 12 may be resin or metal as long as the required strength can be satisfied.

  Finally, the bound magnetic core 11 and the fixture 1 are placed on the fixed plane S so that the bottom surfaces 21 of the pair of side walls 2A and 2B of the fixture 1 abut against the fixed plane S, and the fixture 1 is fixed. The magnetic core 11 is fixed to the fixed plane S by being fixed to the plane S. In addition, as a fixing means to the fixing plane S of the fixing tool 1, as shown in FIG. 5, screwing with a bolt 41 can be exemplified, but in addition, riveting or the like can also be used.

  As shown in FIG. 4, a plurality of fixtures 1 may be attached to one magnetic core 11. When using a plurality of fixtures 1, a plurality of fixtures 1 may be fixed to a plurality of fixing planes. For example, the fixing device 1 may be fixed to two opposing upper and lower planes.

  Further, as shown in FIG. 5, a plurality of fixtures 1 are arranged continuously in the direction of the central axis of the magnetic core 11, and one bolt 42 is inserted into the holes 6 in the side walls 2 </ b> A and 2 </ b> B of these fixtures 1. By fixing with the nut 43, a plurality of fixtures 1 can be connected easily and reliably. Note that the bolt may be inserted only between the adjacent side walls 2A and 2B (between the side wall 2B of the front fixture 1 and the side wall 2A of the back fixture 1 in FIG. 5).

[1-3. effect]
According to the embodiment detailed above, the following effects can be obtained.
(1a) The magnetic core 11 can be bound to the fixture 1 by the binding band 12. Therefore, after fixing to the fixed plane S, the core 11 can be removed without detaching the fixture 1 from the fixed plane S by cutting the binding band 12.

  (1b) Since the magnetic core 11 is restrained by the binding band 12, the impact can be absorbed by deformation and displacement of the binding band 12 when an impact is applied to the magnetic core 11 and the fixture 1. Moreover, since the magnetic core 11 contacts the support part 3 of the fixture 1 at a plurality of locations, the stress applied to the fixture 1 is dispersed. Therefore, a material with relatively low strength can be used for the fixture 1.

  (1c) By bridging the binding band 12 in the direction of the central axis of the magnetic core 11, it is possible to prevent the electrical characteristics of the magnetic core 11 from being deteriorated due to the tightening force. Moreover, the support part 3 can make the tangent of the magnetic core 11 and the bottom surfaces 21 of the pair of side walls 2A and 2B coincide on the same plane. Furthermore, the support part 3 can suppress the play of the fixed magnetic core 11.

(1d) Since the binding band 12 is housed in the groove 24, the plurality of fixtures 1 can be connected without gaps in the direction of the central axis of the magnetic core 11.
(1e) Since the band head 12B of the binding band 12 is housed in the widened region formed by the step 24A of the groove 24, when the tension in the direction toward the magnetic core 11 is applied to the binding band 12, the angle of the band head 12B The part abuts so as to be caught by the step. As a result, the stress applied to the band insertion path 12C of the band head 12B is reduced, so that the resistance of the band coupling portion can be increased. For this reason, even if a resin band is used, the resistance is enhanced.

  (1f) Even if the size of the magnetic core 11 changes, it can be fixed with the fixture 1 having the same shape. For this reason, it is not necessary to change the design according to the size of the magnetic core 11 or to manufacture a mold, and the product cost can be reduced. In particular, according to the present embodiment, since the position where the magnetic core 11 abuts changes depending on the thickness of the magnetic core 11 in the central axis direction, application to the magnetic cores 11 having different sizes is easy.

  (1g) Since the hole 6 penetrating in the central axis direction of the magnetic core 11 is provided in the pair of side walls 2A and 2B, the fixture 1 is moved in the central axis direction of the magnetic core in combination with the binding band 12 being housed in the groove 24. Can be easily connected.

  (1h) Since the fixing means to the fixing plane S of the fixing tool 1 is not limited, the fixing means can be appropriately selected according to the application and the like. Further, a plurality of fixtures 1 can be attached to one magnetic core 11 in an arbitrary direction.

[2. Second Embodiment]
[2-1. Constitution]
The noise current absorber 10 shown in FIG. 4 is a noise countermeasure component that absorbs a noise current by the magnetic core 11. The noise current absorber 10 includes a fixture 1, a magnetic core 11, and a binding band 12 that binds the fixture 1 and the magnetic core 11.

  As described above, the outer peripheral surface of the magnetic core 11 is in contact with the support portion 3 of the fixture 1. The binding band 12 is housed in the groove 24, and spans the inner hole of the magnetic core 11, the outer surface of the pair of side walls 2A and 2B, and the recess 23.

  The noise current absorber 10 can be obtained by combining the magnetic core 11 and the fixture 1 and fixing the binding band 12 in a ring shape by the above-described procedure. Moreover, the noise current absorber 10 may include a plurality of fixtures 1.

[2-2. effect]
According to the embodiment detailed above, the following effects can be obtained.
(2a) After fixing to the fixed plane S, by cutting the binding band 12, the magnetic core 11 can be removed without performing the work of removing the fixture 1 from the fixed plane S.

  (2b) Since the magnetic core 11 is constrained by the binding band 12, the impact can be absorbed by deformation and displacement of the binding band 12 when an impact is applied to the magnetic core 11 and the fixture 1. Moreover, since the magnetic core 11 contacts the support part 3 of the fixture 1 at a plurality of locations, the stress applied to the fixture 1 and the fixing plane S is dispersed.

(2c) By bridging the binding band 12 in the direction of the central axis of the magnetic core 11, it is possible to prevent the electrical characteristics of the magnetic core 11 from being deteriorated due to the tightening force.
(2d) Since the binding band 12 is housed in the groove 24, the plurality of fixtures 1 can be connected without gaps in the direction of the central axis of the magnetic core 11.

  (2e) Since the hole 6 penetrating in the central axis direction of the magnetic core 11 is provided in the pair of side walls 2A and 2B, the noise current absorber 10 is connected to the central axis of the magnetic core in combination with the binding band 12 being housed in the groove 24. Can be easily connected in the direction.

[3. Other Embodiments]
As mentioned above, although embodiment of this indication was described, it cannot be overemphasized that this indication can take various forms, without being limited to the above-mentioned embodiment.

  (3a) In the fixture 1 of the above embodiment, the groove 24 does not necessarily have the step 24A. That is, the band head storage portion may not be formed in the groove 24. Even in such a case, the binding band can be stored in the groove 24 by disposing the band head between the recesses 23 of the pair of side walls 2A and 2B (that is, the back side of the inclined surface 32).

  (3b) In the fixture 1 of the above embodiment, the support portion 3 does not have to have a protruding portion group. That is, the support part 3 may be configured to contact the magnetic core 11 only by the back surface 31 and the inclined surface 32. Conversely, the support part 3 may have five or more pairs of protrusions. In addition, the support part of this indication should just contact | abut to the outer peripheral surface of a magnetic core, and is not limited to a structure like the support part 3 of the said embodiment.

  (3c) In the fixture 1 of the above embodiment, the pair of side walls 2A and 2B may not have the holes 6. Even when the side walls 2A and 2B do not have the holes 6, the fixture 1 can be connected by other means.

  (3d) In the fixture 1 and the noise current absorber 10 of the above embodiment, an annular one is illustrated as the magnetic core 11, but the magnetic core 11 may be an angular ring having a polygonal planar shape. However, the present disclosure has a remarkable effect on the annular magnetic core 11. The magnetic core 11 may have a plurality of inner holes.

  (3e) The fixture 1 of the above embodiment may have a protruding portion that protrudes from the surface of the rear bottom wall 5 on the fixed plane S side. This protrusion can prevent rotation when the fixture 1 is screwed to the fixed plane S.

  (3f) The fixture 1 of the above embodiment may include a groove cover that covers the region on the concave portion 23 side of the groove 24 and projects to the concave portion 23. When the binding band 12 is sent from one recess 23 of the pair of side walls 2A, 2B toward the other recess 23, the tip of the binding band 12 comes into contact with the groove cover and is guided toward the groove 24. Therefore, bundling workability is improved.

  (3g) If the groove | channel 24 can be formed in the position where the inner-hole proximity | contact surface 22 of the fixing tool 1 of the said embodiment overlaps the virtual straight line I which connects the inner hole of the magnetic core 11 and the recessed part 23, it is not necessarily in the circumferential direction C of the magnetic core 11. There is no need to extend along. Further, it is not necessary to face the central axis of the magnetic core 11.

  (3h) The functions of one component in the above embodiment may be distributed as a plurality of components, or the functions of a plurality of components may be integrated into one component. Moreover, you may abbreviate | omit a part of structure of the said embodiment. In addition, at least a part of the configuration of the above embodiment may be added to or replaced with the configuration of the other embodiment. In addition, all the aspects included in the technical idea specified from the wording described in the claims are embodiments of the present disclosure.

DESCRIPTION OF SYMBOLS 1 ... Fixing tool, 2A, 2B ... Side wall, 3 ... Support part, 4 ... Front side bottom wall, 5 ... Rear side bottom wall, 6 ... Hole,
7 ... hole, 10 ... noise current absorber, 11 ... magnetic core, 12 ... binding band, 12A ... band-shaped part,
12B ... Band head, 12C ... Band insertion path, 21 ... Bottom surface, 22 ... Inner hole proximity surface,
23 ... concave portion, 24 ... groove, 24A ... step, 25 ... rising surface, 26 ... top surface, 27 ... side surface,
31 ... Back surface, 32 ... Inclined surface, 33A, 33B ... 1st projection part,
34A, 34B ... second projection, 35A, 35B ... third projection,
36A, 36B ... 4th projection part, 41 ... bolt, 42 ... bolt, 43 ... nut.

Claims (5)

A fixture for fixing an annular magnetic core to a plane parallel to the central axis thereof,
A pair of side walls facing each other across the magnetic core in the direction of the central axis;
A support portion disposed between the pair of side walls and in contact with an outer peripheral surface of the magnetic core;
The pair of side walls include a recess recessed in a direction away from the plane so as to divide a bottom surface contacting the plane, and a groove formed on a surface opposite to the surface facing the magnetic core of the side wall. Each with
The said groove | channel is a fixing tool currently formed in the position which overlaps with the virtual straight line which connects the inner hole of the said magnetic core, and the said recessed part seeing from the central-axis direction of the said magnetic core. The fixture according to claim 1,
Of the pair of side walls, at least one of the grooves has a step that widens from the inner hole side of the magnetic core toward the bottom surface side. The fixing device according to claim 1 or 2,
The support is configured such that the position where the magnetic core abuts changes according to the thickness of the magnetic core in the central axis direction. The fixture according to any one of claims 1 to 3, wherein
The pair of side walls is a fixture having a hole penetrating in a central axis direction of the magnetic core. At least one fixture according to any one of claims 1 to 4, and
An annular magnetic core,
A binding band that binds the fixture and the magnetic core;
The outer peripheral surface of the magnetic core abuts on the support portion of the fixture,
A noise current absorber, wherein the binding band is housed in the groove, and spans the inner hole of the magnetic core, the outer surface of the pair of side walls, and the recess.

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