JP2016092264A - Magnetic material core housing case - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily connect a plurality of magnetic material core housing cases, and to easily prevent from looseness in a case of a magnetic material core.SOLUTION: A magnetic material core housing case has a connecting part 43 having an open hole in a ferrite core housing case formed by rubber, and is fitted a metal collar 7 into the open hole. An external diameter of the annular recess 3a is constructed so as to become similar to or slightly smaller than that of ferrite core 71. An inner diameter of the annular recess 3a is constructed so as to become similar to or slightly larger than the inner diameter of ferrite core 71. Further, a depth of the annular recess 3a is constructed so as to become similar to or slightly smaller than a length that a thickness dimension of a flange part of a cover 5 is added to an axial length of the ferrite core 71.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a magnetic core housing case configured to receive an annular magnetic core.

  Japanese Patent No. 3351993 (Patent Document 1) includes a case main body having an annular recess and a lid for closing the opening of the annular recess, and a magnetic core configured to accommodate a ferrite core in the annular recess. A containment case is described.

  In the magnetic core housing case, a through hole is provided in the outer peripheral portion of the case body, and a plurality of screws are inserted by inserting a connection screw into the through hole and screwing a nut to the tip of the connection screw. The magnetic core housing case can be easily connected together.

Japanese Patent No. 3351993

  By the way, there are variations in the size of the ferrite core and magnetic core housing case to be molded. Therefore, in order to accommodate all the formed ferrite cores in the magnetic core housing case, it is necessary to form the ferrite core and the magnetic core housing case so that the annular recess is slightly larger than the ferrite core. For this reason, rattling may occur when the ferrite core is accommodated in the annular recess. In the magnetic core housing case described above, the ferrite core is fixed to the case main body and the lid with an adhesive to prevent the backlash, and there is still room for improvement in this respect.

  The present invention has been made in view of the above, and it is possible to easily connect a plurality of magnetic core housing cases, and to easily prevent rattling in the case of the magnetic cores. The purpose is to provide technology.

According to a preferred embodiment of the magnetic core housing case according to the present invention, a magnetic core housing case configured to receive the annular magnetic core is configured. The magnetic core housing case includes a case body and an annular cover. The case body has a first through hole, an annular recess concentrically formed in the first through hole, and a second through hole arranged in parallel to the first through hole. The cover is attached to the case body so as to close the opening of the annular recess. And the case main body is comprised by the elastic member. The annular recess is configured to accommodate the magnetic core and is configured to have the same size as the magnetic core or a size smaller than the magnetic core.
In the present invention, “the same size as the magnetic core or smaller than the magnetic core” means, for example, when the magnetic core is formed in a cylindrical shape, the outer diameter, the inner diameter, and the axis of the annular recess. A mode in which the directional length is configured to be the same as the outer diameter, inner diameter, and axial length of the magnetic core, or the outer diameter, inner diameter, and axial length of the annular recess are the outer diameter, inner diameter, and An embodiment configured to be smaller than the axial length corresponds to this. The “elastic member” in the present invention typically corresponds to rubber.

  According to the present invention, since the magnetic core is accommodated while the annular recess is elastically deformed in the expansion direction, the magnetic core is accommodated in the annular recess without causing play between the magnetic core and the annular recess. can do. In addition, since the restoring force of the expanded annular recess acts on the magnetic core accommodated in the annular recess, the magnetic core can be held in the annular recess in a stable state without rattling. In addition, a plurality of magnetic core housing cases can be connected with a simple configuration in which only a fastening member such as a bolt is inserted into the second through hole.

  According to the further form of the magnetic core accommodating case according to the present invention, the magnetic core receiving case further includes a cylindrical member fitted into the second through hole. The said cylindrical member is comprised by the member whose rigidity is higher than a case main body.

  According to this embodiment, when connecting a plurality of magnetic core housing cases, a fastening force generated by fastening a fastening member such as a bolt is received by a cylindrical member having a higher rigidity than the case body. A stable connection structure can be ensured.

  According to the further form of the magnetic body core accommodation case which concerns on this invention, the cylindrical member is comprised with the metal.

  According to this embodiment, a more stable connection structure can be ensured.

  According to the further form of the magnetic core housing case according to the present invention, the cover is constituted by a member having higher rigidity than the case main body.

  According to this form, the assembly | attachment property at the time of attaching a cover to a case main body can be improved.

  According to the further form of the magnetic body core accommodation case which concerns on this invention, the thickness dimension of a case main body is comprised so that it may exist in the range of 1-5 mm. The “thickness dimension” in the present invention typically corresponds to the wall thickness of the case body.

  According to this embodiment, it is possible to optimize both the protective property of the magnetic core and the assembling property when the magnetic core is accommodated in the annular recess.

  According to the further form of the magnetic body core accommodation case which concerns on this invention, the 1st through-hole is comprised so that an electric wire can be penetrated. Moreover, the 1st through-hole is comprised so that it may have a control part which controls the free movement of the radial direction of an electric wire. The “electric wire” in the present invention typically corresponds to a power cable, but preferably includes a signal cable and a control cable.

  According to this form, the play with respect to the electric wire of a magnetic body core accommodation case can be suppressed.

  According to the present invention, it is possible to easily connect a plurality of magnetic core housing cases, and it is possible to easily prevent rattling in the magnetic core case.

It is a perspective view which shows the outline of a structure of the ferrite core accommodation case which concerns on embodiment of this invention. It is a front view of a case body. It is AA sectional drawing of FIG. It is a reverse view of a case main body. FIG. 4 is an external view showing a ferrite core housing case in a state where a ferrite core is housed, with a part cut away. It is sectional drawing which shows a mode that the ferrite core accommodation case of the state which accommodated the ferrite core was attached to the harness. It is a disassembled perspective view which shows a mode that the ferrite core accommodation case of the state which accommodated the ferrite core was attached to the harness. It is a disassembled perspective view which shows a mode that the ferrite core accommodation case of the state which accommodated the ferrite core was attached to the harness.

  Next, the form for implementing this invention is demonstrated using an Example.

  As shown in FIG. 1, the ferrite core housing case 1 according to the embodiment of the present invention includes a case main body 3, a cover 5 attached to the case main body 3, and a collar 7 attached to the case main body 3. Yes. The ferrite core housing case 1 corresponds to the “magnetic core housing case” in the present invention, the ferrite core 71 corresponds to the “magnetic core” in the present invention, and the collar 7 corresponds to the “cylindrical member” in the present invention. It is an example of the corresponding implementation structure.

  As shown in FIG. 1, the case main body 3 includes an inner cylindrical wall portion 31 and an outer cylindrical wall portion 33 that is arranged concentrically with the inner cylindrical wall portion 31 via an annular gap. One end in the axial direction of the inner cylindrical wall portion 31 and the outer cylindrical wall portion 33 is connected by a bottom wall portion 35 as shown in FIG. That is, the case body 3 is configured to define an annular recess 3 a inside by the inner cylindrical wall portion 31, the outer cylindrical wall portion 33 and the bottom wall portion 35.

  A portion corresponding to the other axial end of the inner cylindrical wall portion 31 on the outer peripheral surface of the inner cylindrical wall portion 31 has an overhanging portion 31a projecting outward in the radial direction, as shown in FIG. doing. The thickness dimension t1 of the part (cylindrical part) except the overhang | projection part 31a among the inner cylindrical wall parts 31 is comprised so that it may be set to 3 mm. A harness L described later is inserted through the inner hole 31b of the inner cylindrical wall portion 31.

  The outer cylindrical wall portion 33 is configured by breath molding using rubber as a material. As shown in FIG. 2, the outer cylindrical wall 33 includes a substantially cylindrical main body 41 and a connecting portion 43 provided on the outer peripheral surface of the main body 41 so as to protrude radially outward. It is configured. The portion corresponding to the other axial end of the outer cylindrical wall 33 in the inner peripheral wall surface of the main body 41 has an overhanging portion 41a that projects radially inward as shown in FIG. Yes. The overhanging portion 41a and the overhanging portion 31a face each other with a predetermined gap. The thickness t2 of the main body portion 41 is configured to be 3 mm.

  As shown in FIG. 2, the connecting portion 43 is provided at two locations on the main body portion 41. The connecting portion 43 is disposed on both sides in the diameter direction of the main body portion 41. A through hole 43 a is formed in the connecting portion 43. The through hole 43 a extends in a direction parallel to the axial direction of the inner hole 31 b of the inner cylindrical wall portion 31. The through hole 43a is an example of an implementation configuration corresponding to the “second through hole” in the present invention.

  The thickness dimension t3 of the bottom wall portion is configured to be 3 mm (see FIG. 3). As shown in FIG. 4, the bottom wall portion 35 has a through hole 35 a in the center portion. The through hole 35 a has a diameter that is concentric and the same size as the inner hole 31 b of the inner cylindrical wall portion 31. The inner hole 31b and the through hole 35a are an example of an implementation configuration corresponding to the “first through hole” in the present invention.

  The annular recess 3a is configured as a bottomed recess having an opening 3b in which one end in the axial direction (right side in FIG. 3) is closed by the bottom wall 35 and the other end in the axial direction (left side in FIG. 3) is opened. ing. In the annular recess 3a, the opening 3b formed by the overhang portions 31a and 41a is narrowed.

  As shown in FIG. 6, the outer diameter d <b> 1 (the inner diameter of the outer cylindrical wall portion 33) of the annular recess 3 a is configured to be the same as or slightly smaller than the outer diameter of the ferrite core 71. The inner diameter d2 of the annular recess 3a (the outer diameter of the inner cylindrical wall portion 33) is configured to be the same as or slightly larger than the inner diameter of the ferrite core 71. Further, the depth dp of the annular recess 3a, that is, the distance from the bottom wall portion 35 to the surface facing the bottom wall portion 35 of the overhang portions 31a and 41a is the flange length of the cover 5 described later in the axial length of the ferrite core 71. The length of the portion 53 is configured to be the same as or slightly smaller than the length added.

  The cover 5 is made of a synthetic resin, for example, plastic. As shown in FIG. 1, the cover 5 includes a cylindrical portion 51 and a flange portion 53 that is formed so as to project in both the radially inner and outer directions of the cylindrical portion 51.

  The collar 7 is a cylindrical member made of metal. The outer diameter of the collar 7 is configured to be the same as or slightly larger than the inner diameter of the through hole 43 a of the connecting portion 43 of the outer cylindrical wall portion 33.

  Next, a state when the ferrite core 71 is housed in the ferrite core housing case 1 thus configured and a state when a plurality of ferrite core housing cases 1 are connected will be described. In housing the ferrite core 71 in the ferrite core housing case 1, first, the ferrite core 71 is housed in the annular recess 3 a of the case body 3.

  The ferrite core 71 is accommodated in the annular recess 3a by inserting the ferrite core 71 into the annular recess 3a while expanding the opening 3b of the annular recess 3a. In the annular recess 3a, the ferrite core 71 is further inserted deeply while the annular recess 3a is elastically deformed in the expansion direction. The insertion of the annular recess 3 a of the ferrite core 71 is performed until the end surface of the ferrite core 71 facing the bottom wall portion 35 comes into contact with the bottom wall portion 35.

  When the end surface of the ferrite core 71 comes into contact with the bottom wall portion 35, the cover 5 is subsequently attached to the case body 3. The cover 5 is attached to the case body 3 by inserting the flange portion 53 of the cover 5 into the annular recess 3a. The flange 53 is inserted into the annular recess 3a by expanding the opening 3b and pressing the ferrite core 71 toward the bottom wall 35. Thus, the accommodation of the ferrite core 71 in the ferrite core housing case 1 is completed.

  At this time, as shown in FIG. 5 and FIG. 6, since no gap is generated between the ferrite core 71 and the annular recess 3 a, it is possible to satisfactorily prevent rattling in the annular recess 3 a of the ferrite core 71. And since the restoring force by the elastic deformation of the case main body 3 is acting on the ferrite core 71, the ferrite core 71 can be hold | maintained stably.

  Subsequently, the collar 7 is fitted into the through hole 43 a of the connecting portion 43 of the ferrite core housing case 1 housing the ferrite core 71. Here, since the outer diameter of the collar 7 is configured to be the same as or slightly larger than the inner diameter of the through-hole 43a, backlash does not occur in the through-hole 43a of the collar 7.

  As shown in FIG. 7, a plurality of ferrite core housing cases 1 that house the ferrite core 71 and are attached with the collar 7 are inserted into the harness L. The connecting fitting 61 is inserted through the harness L one by one before the ferrite core housing case 1 is inserted through the harness L and after all the ferrite core housing cases 1 are inserted through the harness L. That is, a plurality of ferrite core housing cases 1 are sandwiched between the two connecting fittings 61.

  Then, as shown in FIG. 8, all the collars 7 are connected from one connecting fitting 61 in a state where one connecting portion 43 of each inserted ferrite core housing case 1 and the connecting portion 61 a of the connecting fitting 61 are matched. The connecting bolt BLT is inserted through the inner hole to the other connecting fitting 61, and the nut N is screwed into the threaded portion of the connecting bolt BLT. Further, the connecting bolt BLT is inserted into the through hole 43a of each connecting portion 43 of each inserted ferrite core housing case 1, and a nut (not shown) is screwed into the threaded portion of the connecting bolt BLT. Thereby, the connection of the plurality of ferrite core housing cases 1 is completed.

  Here, since the fastening force of the connecting bolt BLT acts on the collar 7 and does not act on the connecting portion 43 of the outer cylindrical portion 33, a stable connecting structure can be ensured.

  In the present embodiment, the collar 7 is made of metal, but is not limited thereto. The collar 7 may be made of a material having higher rigidity than the outer cylindrical wall portion 33, and may be made of plastic, for example.

  In this embodiment, the cover 5 is made of plastic, but may be made of the same rubber as the outer cylindrical wall portion 33. In this case, a configuration using rubber having higher rigidity than the outer cylindrical wall portion 33 is desirable.

  In the present embodiment, the thickness dimension t1 of the inner cylindrical wall portion 31 is 3 mm, the thickness dimension t2 of the main body 41 of the outer cylindrical wall portion 33 is 3 mm, and the thickness dimension t3 of the bottom wall portion is 3 mm. However, it is not limited to this.

  In the present embodiment, no particular mention is made of the movement restriction of the harness L in the inner hole 31b and the through hole 35a. As a configuration for fixing the coupling fitting 61 to the harness L using a binding tool, a tape, or the like, a configuration for restricting the free movement of the harness L in the inner hole 31b and the through hole 35a may be adopted. According to the said structure, the rattling with respect to the harness L of the ferrite core accommodation case 1 can be suppressed.

  In the present embodiment, the collar 7 made of metal is attached to the through hole 43a of the connecting portion 43, but the present invention is not limited to this. For example, without using the collar 7, the through hole 43 a portion of the connecting portion 43 or the connecting portion 43 itself may be configured to be more rigid than the main body portion 41. In this case, the through-hole 43a portion of the connecting portion 43 or the connecting portion 43 itself may be two-color molded using a material having higher rigidity than the main body portion 41.

  This embodiment shows an example for carrying out the present invention. Therefore, the present invention is not limited to the configuration of the present embodiment.

1 Ferrite core storage case (magnetic core storage case)
3 Case body (Case body)
3a annular recess (annular recess)
3b Opening 5 Cover (Cover)
7 Color (cylindrical member)
31 inner cylindrical wall 31a overhang 31b inner hole (first through hole)
33 Outer cylindrical wall portion 35 Bottom wall portion 35a Through hole (first through hole)
41 body portion 41a overhang portion 43 connecting portion 43a through hole (second through hole)
51 Cylindrical part 53 Flange part 61 Connecting metal fitting 71 Ferrite core (magnetic core)
BLT connecting bolt L harness N nut

Claims (6)

A magnetic core housing case configured to store an annular magnetic core,
A case body having a first through hole, an annular recess concentrically formed in the first through hole, and a second through hole arranged in parallel to the first through hole;
An annular cover attached to the case body so as to close the opening of the annular recess;
With
The case body is made of an elastic member,
The said annular recessed part is comprised so that the said magnetic body core can be accommodated, and it is comprised so that it may become the same dimension as the said magnetic body core, or a dimension smaller than the said magnetic body core. A cylindrical member fitted into the second through hole;
The magnetic core housing case according to claim 1, wherein the cylindrical member is configured by a member having higher rigidity than the case main body.   The magnetic core housing case according to claim 2, wherein the cylindrical member is made of metal. The magnetic core housing case according to claim 1, wherein the cover is made of a member having higher rigidity than the case main body. The magnetic core housing case according to any one of claims 1 to 4, wherein a thickness dimension of the case main body is configured to be within a range of 1 to 5 mm. The said 1st through-hole is comprised so that insertion of an electric wire is possible, and it is comprised so that it may have a control part which controls the free movement of the radial direction of this electric wire. Magnetic core housing case.

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