JP6643596B2 - Noise suppression components - Google Patents

Description

  The present disclosure relates to a noise suppression component mounted on a power or communication conductor.

  As a noise countermeasure component mounted on a power or communication conductor, a noise countermeasure component including an elastomer portion including a ferrite core (hereinafter, also referred to as a core portion) has been proposed (for example, see Patent Document 1). .). In the case of this noise suppression component, when the elastomer portion comes into contact with the conductor (lead in Patent Document 1) passed through the inner peripheral side of the core portion in a pressurized state, the magnetic material weighs itself along the conductor. Slipping can be suppressed.

JP 2012-104556 A

  By the way, in the case of the technique described in Patent Document 1, there is a portion near one end of the inner peripheral surface of the core portion where the outer surface of the core portion reaches the outer surface of the elastomer portion. This portion corresponds to a portion where the core portion is in direct contact with the mold when the core portion is installed in the mold. In such a portion, the coating by the elastomer portion may be interrupted, and in that case, the outer surface of the core portion is exposed to the outside of the elastomer portion, though very slightly.

  Therefore, when a conductor for power or communication comes into contact with the core in such a location, the conductor may be electrically connected to the core, and a high degree of electrical insulation between the conductor and the core may occur. However, there is a problem that it is difficult to respond to such a request when the request is made.

  In addition, when the conductor for power or communication is in direct contact with the core, the conductor and the core are worn more than when the elastomer is interposed between the conductor and the core. It will be easier. In particular, in an environment where vibrations from the outside are transmitted, there is a problem that the conductor and the core are likely to be worn.

  Furthermore, when the power or communication conductor is in direct contact with the core, heat is transferred from the conductor to the core compared to when the elastomer is interposed between the conductor and the core. It may be easily transmitted, and the impedance characteristic of the core may change. In particular, in the case of power conductors through which large currents flow, the conductors may generate heat and become hot, so if such heat is transmitted to the core, the performance of the noise countermeasure components may be reduced. Was likely to appear.

  Under the circumstances described above, it is desirable to provide a noise suppression component in which the power or communication conductor does not contact the core.

  The noise suppression component described below is made of a magnetic material and has a core portion having a shape having a through hole, and is made of an electrically insulating material, and a power or communication conductor is inserted into the through hole. An insulating portion capable of electrically insulating the conductor and the core portion by being interposed between the conductor and the core portion when interposed therebetween, at least a part of the insulating portion being an elastomer portion made of an elastomer material. When the conductor is inserted into the through hole, the elastomer is elastically deformed and pressure is applied to the conductor, so that the core can be prevented from slipping along the conductor by its own weight. ing.

  The noise suppression member of the present disclosure is a member that is mounted on the outer periphery of a power or communication conductor to attenuate a noise current or a surge current flowing through the conductor. That is, the noise countermeasure according to the present disclosure is a concept including a surge countermeasure, and the noise countermeasure member of the present disclosure is a member capable of implementing the noise countermeasure including the surge countermeasure. The conductors for power or communication include various electric wires such as power cables and communication cables, leads and bus bars of electronic components, and the like.

  According to the noise suppression component configured as described above, when the power or communication conductor is inserted into the through hole of the core portion, the insulating portion is interposed between the conductor and the core portion, Isolate the conductor and core so that they do not touch each other. Therefore, unlike a conventional product in which the core portion is exposed to the outside at a location where the conductor and the core portion can come into contact, the conductor and the core portion are not electrically connected.

  In addition, since the insulating portion is interposed between the conductor and the core portion, it is possible to prevent the conductor and the core portion from directly contacting each other, so that wear of the conductor and the core portion can be suppressed. Therefore, even if the noise suppression component is used in an environment where vibrations from the outside are transmitted, for example, unlike a conventional product in which the core portion is exposed to the outside at a place where the conductor and the core portion can come into contact, the conductor and the Wear of the core portion can be suppressed.

  Furthermore, since the insulating portion is interposed between the conductor and the core portion, it is possible to prevent the conductor and the core portion from directly contacting each other, so that it is possible to suppress the transfer of heat from the conductor to the core portion. Therefore, it is possible to suppress a change in the impedance characteristic of the core portion and suppress a decrease in the performance of the noise countermeasure component, as compared with a case where heat is directly transmitted from the conductor to the core portion.

  Further, at least a part of the insulating portion is an elastomer portion, and when the conductor is inserted into the through hole, the elastomer portion is elastically deformed and comes into contact with the conductor while applying pressure, so that the core portion has its own weight. Suppresses slipping along the conductor. Therefore, after mounting the noise suppression component on the conductor, when the electronic component or the electric component having the conductor is mounted on an electronic circuit board or the like, it is possible to suppress the noise suppression component from falling off the conductor. Therefore, better workability can be ensured as compared with the case where a core that easily falls off from the conductor is used. Further, when the above-described elastomer portion is provided, the vibration can be absorbed when the vibration is transmitted from the outside. Alternatively, when an external impact is applied, the impact can be reduced.

FIG. 1A is a perspective view of the noise suppression component of the first embodiment as viewed from the upper right front. FIG. 1B is a perspective view of the noise suppression component of the first embodiment as viewed from the lower right front. FIG. 1C is a perspective view showing a positional relationship between a core part and other parts of the noise suppression component of the first embodiment. FIG. 1D is a perspective view showing a positional relationship between the cylindrical portion and other portions of the noise suppression component of the first embodiment. FIG. 2A is a plan view of the noise suppression component of the first embodiment. FIG. 2B is a front view of the noise suppression component of the first embodiment. FIG. 2C is a right side view of the noise suppression component of the first embodiment. FIG. 2D is a bottom view of the noise suppression component of the first embodiment. FIG. 2E is a cross-sectional view taken along the line IIE-IIE in FIG. 2B. FIG. 2F is a cross-sectional view taken along the line IIF-IIF in FIG. 2C. FIG. 3A is a vertical cross-sectional view of the mold and the cylindrical portion before being placed in the mold as viewed from the right side. FIG. 3B is a vertical cross-sectional view of the mold and the cylindrical portion before being put into the mold as viewed from the front side. FIG. 3C is a vertical cross-sectional view of the mold and the cylindrical portion after being placed in the mold as viewed from the right side. FIG. 3D is a longitudinal sectional view of the mold and the cylindrical portion after being placed in the mold as viewed from the front side. FIG. 4A is a vertical cross-sectional view of a mold, a cylindrical portion, and a core before being put into the mold, as viewed from the right side. FIG. 4B is a longitudinal sectional view of the mold, the cylindrical portion, and the core before being put into the mold, as viewed from the front side. FIG. 4C is a vertical cross-sectional view of the core portion after being placed in the mold and the cylindrical portion and the mold as viewed from the right side. FIG. 4D is a vertical cross-sectional view of the core portion after being placed in the mold and the cylindrical portion and the mold as viewed from the front side. FIG. 5A is a longitudinal sectional view of the closed state of the mold as viewed from the right side. FIG. 5B is a longitudinal sectional view of the closed state of the mold as viewed from the front side. FIG. 5C is a vertical cross-sectional view of a state in which the mold is filled with the elastomer material as viewed from the right side. FIG. 5D is a longitudinal sectional view of a state in which the mold is filled with the elastomer material as viewed from the front side. FIG. 6A is a vertical cross-sectional view of a state attached to a conductor viewed from the front side. FIG. 6B is a vertical cross-sectional view of a state attached to the conductor as viewed from the right side. FIG. 7A is a perspective view of the noise suppression component of the second embodiment viewed from the upper right front. FIG. 7B is a perspective view of the noise suppression component of the second embodiment as viewed from the lower right front. FIG. 7C is a perspective view of the noise suppression component of the second embodiment as viewed from the lower right front, and is a perspective view also showing the position of the core portion. FIG. 7D is a perspective view showing a positional relationship between a core part and other parts of the noise suppression component of the second embodiment. FIG. 8A is a plan view of the noise suppression component of the second embodiment. FIG. 8B is a front view of the noise suppression component of the second embodiment. FIG. 8C is a right side view of the noise suppression component of the second embodiment. FIG. 8D is a bottom view of the noise suppression component of the second embodiment. FIG. 8E is a cross-sectional view taken along the line VIIIE-VIIIE in FIG. 8B. FIG. 8F is a cross-sectional view taken along the line VIIIF-VIIIF in FIG. 8C. FIG. 9A is a longitudinal sectional view of the closed state of the mold as viewed from the right side. FIG. 9B is a vertical cross-sectional view of a state in which the mold is filled with the elastomer material as viewed from the right side. FIG. 10A is a perspective view of the noise suppression component of the third embodiment viewed from the upper right front, and is a perspective view also showing the position of the core portion. FIG. 10B is a perspective view showing a positional relationship between a core part and other parts of the noise suppression component of the third embodiment. FIG. 11A is a plan view of the noise suppression component of the third embodiment. FIG. 11B is a front view of the noise suppression component of the third embodiment. FIG. 11C is a right side view of the noise suppression component of the third embodiment. FIG. 11D is a bottom view of the noise suppression component of the third embodiment. FIG. 12A is a cross-sectional view taken along the line XIIA-XIIA in FIG. 11C. FIG. 12B is a cross-sectional view taken along the line XIIB-XIIB in FIG. 11B. FIG. 12C is a cross-sectional view taken along the line XIIC-XIIC in FIG. 11B. FIG. 13A is a vertical cross-sectional view of the closed state of the mold as viewed from the front side. FIG. 13B is a longitudinal sectional view of the closed state of the mold as viewed from the right side. FIG. 13C is a longitudinal sectional view of a state in which the mold is filled with the elastomer material as viewed from the front side. FIG. 13D is a vertical cross-sectional view of a state in which the mold is filled with the elastomer material as viewed from the right side. FIG. 14A is a perspective view of the noise suppression component of the fourth embodiment viewed from the upper right front. FIG. 14B is a perspective view of the noise suppression component of the fourth embodiment as viewed from the lower right front, and is a perspective view also illustrating the positions of the core portion and the tubular portion. FIG. 14C is a perspective view showing the positional relationship between the core part and other parts of the noise suppression component of the fourth embodiment. FIG. 14D is a perspective view showing a positional relationship between a cylindrical portion and another portion of the noise suppression component of the fourth embodiment.

Next, the above-described noise suppression component will be described with reference to an exemplary embodiment.
(1) First Embodiment As shown in each of FIGS. 1A to 1D and FIGS. 2A to 2F, a noise suppression component 1 of the first embodiment includes a core unit 3 and an insulating unit. 5 is provided. In the present embodiment, the left side view of the noise suppression component 1 appears the same as the right side view. The rear view of the noise suppression component 1 appears the same as the front view. In the following description, description will be made by using the front, rear, left, right, up, and down directions, which are also shown in the drawing, as necessary.

  In the six views of the noise suppression component 1, these directions are the direction in which the part appearing in the front view is oriented, the direction in which the part appearing in the rear view is oriented, and the direction in which the part appearing in the left side view is oriented. Is a relative direction that defines a direction in which a part appearing in a right side view is directed to the right, a direction in which a part appearing in a plan view is directed upward, and a direction in which a part appearing in a bottom view is directed downward. However, these directions are merely directions defined in order to briefly explain the relative positional relationship between the components constituting the noise suppression component 1. Therefore, when the noise suppression component 1 is used, the direction in which the noise suppression component 1 is installed is arbitrary.

  The core 3 is made of a magnetic material. In the case of the present embodiment, manganese zinc ferrite is used as the magnetic material. The core part 3 is formed in a substantially cylindrical shape and has a shape having a through hole 7. The through hole 7 penetrates the core portion 3 in the vertical direction in the drawing.

  The insulating part 5 is made of a material having electrical insulation. More specifically, the insulating section 5 has an elastomer section 11 and a tubular section 13. The elastomer section 11 is made of an elastomer material. In the case of the present embodiment, a synthetic rubber is used as the elastomer material. The overall shape of the elastomer portion 11 is formed in a substantially cylindrical shape, and a groove 15 extending in the circumferential direction is provided on the outer peripheral surface.

  Further, the elastomer portion 11 is provided with a passage 17 penetrating vertically between the upper surface and the lower surface of the elastomer portion 11. As shown in FIGS. 2A and 2D, the cross-sectional shape of the passage 17 orthogonal to the up-down direction is a flat shape whose lateral dimension is longer than the longitudinal dimension. A pair of protrusions 21 are provided on the inner surface of the passage 17. One protrusion 21 protrudes rearward from a surface directed rearward, and the other protrusion 21 protrudes forward from a surface directed forward. As shown in FIGS. 2E and 2F, the lower end of the passage 17 has a shape in which the right-left dimension and the front-rear dimension of the passage 17 are increased toward the lower end.

  Further, recesses 23 are provided on the lower surface of the elastomer portion 11 at positions on both sides in the front-rear direction with the passage 17 therebetween. The recess 23 is provided at a position away from the passage 17. 2D and 2E, the surface of the core portion 3 is exposed to the outside of the elastomer portion 11 at the portion that enters the inside of the concave portion 23.

  The tubular portion 13 is formed of a tubular body made of an electrically insulating resin film. In the case of the present embodiment, the tubular portion 13 is formed of a tube made of a polyimide film (that is, a polyimide tube). The cylindrical portion 13 is disposed at a position penetrating the through hole 7 in the direction of the penetration of the through hole 7. In the case of the present embodiment, the tubular portion 13 has a structure embedded inside the elastomer portion 11. As shown in FIGS. 2E and 2F, the upper end of the cylindrical portion 13 protrudes upward from the upper end of the core portion 3, and the lower end of the cylindrical portion 13 protrudes below the lower end of the core portion 3. Thereby, it is configured such that the cylindrical portion 13 exists at least between the inner peripheral surface of the core portion 3 and the passage 17.

  The noise suppression component 1 as described above can be manufactured by the following procedure. First, as shown in FIGS. 3A and 3B, in a state where the first mold 301 and the second mold 302 are combined at a predetermined position, the tubular portion 13 is put into the mold. At this time, as shown in FIGS. 3C and 3D, the cylindrical portion 13 is fitted into the passage forming protrusion 31 for forming the passage 17. Thus, the cylindrical portion 13 is held at an expected position without falling or leaning in the mold. As shown in FIGS. 3B and 3D, the lower end of the passage forming projection 31 is shaped so that the dimension in the left-right direction increases toward the lower end. Therefore, the lower end of the cylindrical portion 13 contacts the passage forming projection 31 at a predetermined position and is supported at that position.

  Subsequently, as shown in FIGS. 4A and 4B, the core portion 3 is put into a mold. At this time, the core portion 3 is fitted on the outer peripheral side of the tubular portion 13 as shown in FIGS. 4C and 4D. As a result, the core portion 3 is held at a desired position without falling or tilting in the mold. Further, the lower end of the core portion 3 comes into contact with a projection 33 for forming a concave portion for forming the concave portion 23. As a result, the core 3 is brought into a state where it is supported by the projection 33 for forming a concave portion.

  Subsequently, as shown in FIGS. 5A and 5B, the third mold 303 is assembled at a predetermined position, and the mold is closed. In this state, the elastomer material is injected into the mold, and the elastomer portion 11 is formed as shown in FIGS. 5C and 5D. After the molding of the elastomer portion 11, the mold is opened, and the noise suppression component 1 is removed from the mold.

  The noise suppression component 1 as described above is attached to, for example, a lead 37 (corresponding to an example of a communication conductor in the present specification) provided in the electronic component 35 as shown in FIGS. 6A and 6B. A noise current or a surge current flowing through the lead 37 is attenuated.

  When attaching the noise suppression component 1 to the lead 37, the lead 37 is inserted into the passage 17 of the elastomer portion 11. The passage 17 is located at a position penetrating the inner peripheral side of the tubular portion 13. When the lead 37 is inserted into the passage 17, the lead 37 is also inserted into the inner peripheral side of the tubular portion 13. The passage 17 and the cylindrical portion 13 are located at positions penetrating the inner peripheral side of the through hole 7 of the core portion 3, and when the lead 37 is inserted into the passage 17, the lead 37 is inserted into the through hole of the core portion 3. 7 can be inserted into the inner peripheral side.

  When the lead 37 is inserted into the passage 17, the protrusion 21 in the passage 17 comes into contact with the lead 37, and the elastomer portion 11 is elastically deformed. Therefore, the elastomer portion 11 applies a pressure to the lead 37, thereby suppressing the core portion 3 from slipping down along the lead 37 by its own weight. That is, since the cross-sectional area of the passage 17 is not constant due to the provision of the protrusions 21 as described above, the lead 37 is gripped by the elastomer portion 11 at a portion where the cross-sectional area of the passage 17 is narrow, and the core portion is formed. 3 slippage is suppressed.

  Therefore, when the electronic component 35 having the lead 37 is mounted on an electronic circuit board or the like after the noise suppression component 1 is mounted on the lead 37, it is possible to suppress the noise prevention component 1 from falling off from the lead 37. Therefore, good workability can be ensured as compared with the case where a core that easily falls off from the lead 37 is used. Further, when the above-described elastomer portion 11 is provided, the vibration can be absorbed when the vibration is transmitted from the outside. Alternatively, when an external impact is applied, the impact can be reduced.

  The elastomer portion 11 and the cylindrical portion 13 constitute the insulating portion 5. When the lead 37 is inserted into the through hole 7, the insulating portion 5 is interposed between the lead 37 and the core portion 3. By doing so, the lead 37 and the core 3 are electrically insulated. Therefore, unlike the conventional product in which the core part 3 is exposed to the outside at a place where the lead 37 and the core part 3 can come into contact, the lead 37 and the core part 3 are not electrically connected.

  In addition, since the insulating portion 5 is interposed between the lead 37 and the core portion 3, the lead 37 and the core portion 3 are prevented from directly contacting each other. it can. Therefore, for example, even when the noise suppression component 1 is used in an environment where vibration from the outside is transmitted, the core 3 is exposed to the outside at a place where the lead 37 and the core 3 can come into contact with each other. In contrast, it is possible to suppress the wear of the lead 37 and the core 3.

  Furthermore, since the insulating portion 5 is interposed between the lead 37 and the core portion 3, it is possible to prevent the lead 37 and the core portion 3 from directly contacting each other, thereby suppressing the transmission of heat from the lead 37 to the core portion 3. You can also. Therefore, as compared with the case where the structure is such that heat is directly transmitted from the lead 37 to the core portion 3, a change in impedance characteristics of the core portion 3 can be suppressed, and a decrease in performance of the noise suppression component 1 can be suppressed. .

  Further, in the case of the noise suppression component 1, since the insulating portion 5 includes the cylindrical portion 13 as described above, even when the wear of the elastomer portion 11 has progressed, the cylindrical portion 13 can suppress the wear. it can. Therefore, as compared with the case where the insulating portion 5 is constituted by the elastomer portion 11 alone, the mechanical strength of the insulating portion 5 can be increased, and high electrical insulation can be secured.

  Further, in the case of the noise suppression component 1, the elastomer portion 11 has the concave portion 23 at a position away from the portion through which the lead 37 is passed, and the surface of the core portion 3 has the external surface at the portion that enters the inside of the concave portion 23. It is exposed to. Therefore, even if an object comes into contact with the noise suppression component 1, the possibility that the object comes into contact with the surface of the core portion 3 exposed to the outside can be reduced, and such an object and the core portion 3 are electrically connected. Can be suppressed. Further, since such a concave portion 23 is provided at a position away from a place where the lead 37 is passed, the lead 37 can enter the inside of the concave portion 23 and come into contact with the surface of the core portion 3 exposed to the outside. And the electrical connection between the lead 37 and the core 3 can be suppressed.

  In addition, if the concave portion 23 as described above is provided, the inner surface of the mold can be brought into contact with the core portion 3 by using a portion where the surface of the core portion 3 is exposed to the outside. Therefore, the relative position between the core portion 3 and the mold can be easily determined. Therefore, the relative position between the core portion 3 and the insulating portion 5 can be set in a positional relationship as designed, and the core portion 3 is easily shifted or inclined to a position biased with respect to the insulating portion 5 when the insulating portion 5 is formed. As compared with the case, the insulation performance by the insulating portion 5 can be exhibited as designed. After molding the elastomer portion 11, it is possible to check afterwards whether or not the core portion 3 is included by looking inside the concave portion 23. Therefore, inspection work of the noise suppression component 1 can be easily performed.

(2) Second Embodiment Next, a second embodiment will be described. In addition, since the second embodiment and the subsequent embodiments have many functionally common points with the first embodiment, detailed description will be made focusing on differences from the first embodiment, and functionally different from the first embodiment. Common parts are denoted by the same reference numerals as in the first embodiment, and detailed description thereof is omitted.

  As shown in each of FIGS. 7A to 7D and each of FIGS. 8A to 8F, the noise suppression component 41 of the second embodiment includes a core unit 3 and an insulating unit 5. However, the insulating part 5 of the second embodiment is constituted by the elastomer part 11 alone, and the tubular part 13 described in the first embodiment is omitted. In the present embodiment, the left side view of the noise suppression component 41 appears the same as the right side view. The rear view of the noise suppression component 41 appears the same as the front view.

  Also, in the second embodiment, a concave portion 23 is provided on the lower surface of the elastomer portion 11, but the shape and the number of the concave portion 23 are different from those of the first embodiment. Specifically, in the second embodiment, three concave portions 23 are provided on the lower surface of the elastomer portion 11.

  Further, in the second embodiment, three positioning portions 43 are provided on the lower surface of the core portion 3. Each of the positioning portions 43 is a bottomed hole which is concavely formed in a column shape. As shown in FIG. 8D, these three positioning portions 43 are located at positions exactly overlapping the three concave portions 23 when viewed from below, and have a diameter slightly larger than the three concave portions 23. In the second embodiment as well, the surface of the core portion 3 is exposed to the outside at the portion that enters the inside of the concave portion 23, but the exposed portion is the inner bottom surface of the positioning portion 43 described above.

  As shown in FIGS. 9A and 9B, the noise suppression component 41 of the second embodiment as described above can also be manufactured using a mold similar to that of the first embodiment. When the core portion 3 is placed in the mold, as shown in FIG. 9A, at the lower end of the core portion 3, the inner bottom surfaces of the three positioning portions 43 come into contact with the recess-forming projections 33. As a result, the core portion 3 is supported by the concave portion forming protrusions 33, and the displacement in the horizontal direction is restricted. Therefore, as shown in FIG. 9B, when the elastomer material is injected into the mold, even if pressure acts on the core portion 3 from the elastomer material, the core portion 3 is held at the expected position. , As designed.

  Therefore, it is possible to reduce the possibility that the core portion 3 is inclined or deviated during the molding of the elastomer portion 11, so that it is difficult to form a portion where the thickness of the insulating portion 5 becomes too small, and the insulating performance of the insulating portion 5 is exhibited as designed. Can be done. In addition, for the purpose of supporting the core portion 3 in the mold, a portion where the core portion 3 is exposed to the outside and a portion where the elastomer portion 11 becomes thin are formed at contact portions between the core portion 3 and the mold. Such a portion is located inside the recess 23 and away from the passage 17. Therefore, the possibility that a conductor or any object passed through the passage 17 comes into contact with the core portion 3 can be reduced.

  It should be noted that the noise current or surge current flowing through the lead is attenuated, the elastic member 11 can be attached to the lead by using the elastic force thereof, and the elastomer portion 11 can absorb vibration and reduce impact. The point that the heat transmitted from the lead to the core portion 3 can be suppressed by the elastomer portion 11 is the same as in the first embodiment.

(3) Third Embodiment Next, a third embodiment will be described. As shown in each of FIGS. 10A to 10B, FIGS. 11A to 11D, and FIGS. 12A to 12C, the noise suppression component 51 exemplified in the third embodiment has The shape and dimensions are different from the first embodiment and the second embodiment. More specifically, the noise suppression component 51 exemplified in the third embodiment is designed with a shape and dimensions that are assumed to be attached to a bus bar that is a power conductor.

  Further, the noise suppression component 51 exemplified in the third embodiment includes the core unit 3 and the insulating unit 5. However, the insulating part 5 of the third embodiment is constituted by the elastomer part 11 alone, and the tubular part 13 described in the first embodiment is omitted. That is, it is structurally similar to the second embodiment in that the tubular portion 13 illustrated in the first embodiment is omitted. In this embodiment, the left side view of the noise suppression component 51 appears the same as the right side view. The rear view of the noise suppression component 51 appears the same as the front view.

  Also in the third embodiment, the elastomer portion 11 is provided with the concave portion 23, but the shape and the number of the concave portion 23 are different from those of the first embodiment and the second embodiment. Specifically, in the third embodiment, four recesses 23 are provided at locations below the center of the elastomer portion 11 in the vertical direction. These four concave portions 23 are concave portions 23 in which the surface of the core portion 3 is exposed to the outside at a portion that enters the inside of the concave portion 23. Further, six sub-recesses 53 are provided at a position above the center in the vertical direction of the elastomer portion 11. These six sub-recesses 53 are the concave portions 23 in which the surface of the core portion 3 may be exposed to the outside at a location that enters the inside of the sub-recess 53. However, whether or not the surface of the core portion 3 is exposed to the outside inside the sub-recess 53 is indeterminate because it changes depending on how much the core portion 3 is tilted within the range of the tolerance.

  As shown in FIGS. 13A to 13D, the noise suppression component 51 of the third embodiment as described above is also manufactured using a mold similar to that of the first and second embodiments. can do. When the core portion 3 is placed in the mold, as shown in FIGS. 13A and 13B, the core portion 3 comes into contact with the projection 33 for forming the concave portion. As a result, the core portion 3 is supported by the concave portion forming protrusions 33, and the displacement in the horizontal direction is restricted. Therefore, as shown in FIG. 13C and FIG. 13D, when the elastomer material is injected into the mold, even if pressure acts on the core portion 3 from the elastomer material, the core portion 3 is in an expected position. Retained and assembled in the designed position. Further, even if the core portion 3 is slightly inclined, in that case, since the core portion 3 comes into contact with the sub recessed portion forming projection 55, the inclination is within the tolerance range (that is, within the allowable range). Fits in.

  Therefore, it is possible to reduce the possibility that the core portion 3 is inclined or deviated during the molding of the elastomer portion 11, so that it is difficult to form a portion where the thickness of the insulating portion 5 becomes too small, and the insulating performance of the insulating portion 5 is exhibited as designed. Can be done. In addition, for the purpose of supporting the core portion 3 in the mold, a portion where the core portion 3 is exposed to the outside and a portion where the elastomer portion 11 becomes thin are formed at contact portions between the core portion 3 and the mold. Such a portion is located at a position that enters the inside of the recess 23 or the sub-recess 53, and is located away from the passage 17. Therefore, the possibility that the bus bar or any object passed through the passage 17 contacts the core portion 3 can be reduced.

  The noise current or the surge current flowing through the conductor is attenuated, the elastic member 11 can be attached to the conductor using the elastic force of the elastomer portion 11, and the elastomer portion 11 can absorb vibration and reduce impact. The point that the heat transmitted from the conductor to the core portion 3 can be suppressed by the elastomer portion 11 is similar to the first embodiment and the second embodiment.

(4) Fourth Embodiment Next, a fourth embodiment will be described. As shown in each of FIGS. 14A to 14D, the noise suppression component 61 illustrated in the fourth embodiment is further illustrated in the first embodiment with respect to the noise suppression component 41 illustrated in the second embodiment. It has a cylindrical portion 13 added. If such a configuration is adopted, the insulating performance of the insulating portion 5 can be improved to the same degree as in the first embodiment by the action of the cylindrical portion 13, and a measure against abrasion of the elastomer portion 11 can be taken. In addition, since the positioning portion 43 similar to that of the second embodiment is provided on the lower surface of the core portion 3, the possibility that the core portion 3 is inclined or deviated when the elastomer portion 11 is molded can be reduced. Insulation performance can be exhibited as designed.

  It should be noted that the noise current or surge current flowing through the lead is attenuated, the elastic member 11 can be attached to the lead by using the elastic force thereof, and the elastomer portion 11 can absorb vibration and reduce impact. The point that the heat transmitted from the lead to the core portion 3 can be suppressed by the elastomer portion 11 is the same as in the first embodiment and the second embodiment.

(5) Other Embodiments As described above, the noise suppression component 61 has been described with reference to the exemplary embodiments, but the above-described embodiments are merely examples as one aspect of the present disclosure. That is, the present disclosure is not limited to the exemplary embodiments described above, and can be implemented in various forms without departing from the technical idea of the present disclosure.

  For example, in the first embodiment and the fourth embodiment, in order to configure the tubular portion 13, a polyimide tube that is formed in a tubular shape in advance is used, but the present invention is not limited to this. As an example other than the polyimide tube, a polyimide sheet may be rounded and used in a tubular shape. When the sheet is rolled into a cylindrical shape, the sheet may be rounded so that both ends in the circumferential direction overlap with each other, whereby a cylindrical body having no gap over the entire outer peripheral surface can be formed. However, both ends in the circumferential direction do not have to overlap as long as some gaps can be formed in a range where there is no actual harm.

  As long as the polyimide tube is formed into a tubular shape in advance, it can be placed alone in the mold without any special measures. On the other hand, when the polyimide sheet is rolled into a tubular shape, both ends in the circumferential direction may be joined by a method such as adhesion or welding, after the rolled tubular shape. Alternatively, the core portion 3 may be placed in the mold first, and a rolled and cylindrical polyimide sheet may be inserted into the through hole 7 of the core portion 3. In this case, the cylindrical polyimide sheet tends to expand in the direction in which the diameter increases, whereby the polyimide sheet is pressed against the inner peripheral surface of the core portion 3 and held in that state. Therefore, if such a method is used, it is not essential to previously process the polyimide sheet into a tube shape.

Further, the resin material forming the cylindrical portion is not limited to polyimide. As a film other than polyimide, a PPS (polyphenylene sulfide resin) film or the like is suitable.
In the above-described embodiment, synthetic rubber is illustrated as an example of the elastomer material constituting the elastomer portion 11, but other elastomer materials may be used, such as thermoplastic elastomers and thermosetting elastomers (for example, synthetic rubber and natural rubber). Both are available. Specific examples of the thermoplastic elastomer include, for example, olefin-based, styrene-based, ester-based, amide-based, and various thermoplastic elastomers such as urethane-based, and further, hydrogenation of these various thermoplastic elastomers, and the like. Modified products and the like can be mentioned. Specific examples of the thermosetting elastomer include styrene butadiene rubber, butadiene rubber, chloroprene rubber, nitrile butadiene rubber, butyl rubber, urethane rubber, silicone rubber, fluorine rubber, and acrylic rubber.

  In the above-described embodiment, the tubular portion 13 has a structure embedded in the elastomer portion 11. However, whether the tubular portion 13 is embedded in the elastomer portion 11 is optional. is there. When the tubular portion 13 is not embedded in the elastomer portion 11, the tubular portion 13 only needs to be disposed on the inner peripheral side of the elastomer portion 11. In this case, the passage 17 is constituted by the inner peripheral surface of the cylindrical portion 13.

  In the above-described embodiment, manganese zinc ferrite has been exemplified as an example of the magnetic material forming the core portion 3. However, another magnetic material may be used. Other magnetic materials include, for example, iron aluminum silicon alloy (Sendust (registered trademark)), nickel iron alloy (permalloy), cobalt iron alloy, iron silicon boron alloy, various ferrite magnetic materials, amorphous magnetic material, etc. Can be mentioned. As ferrite magnetic materials, besides the above-mentioned manganese zinc ferrite, hexagonal crystals such as spinel ferrite having a spinel type crystal structure such as nickel zinc ferrite, magnesium zinc ferrite, copper zinc ferrite, and magnetite, barium ferrite, strontium ferrite, etc. Ferrite, garnet ferrite such as yttrium iron garnet, and the like can be given. Examples of the amorphous magnetic material include an iron alloy, a cobalt alloy, a nickel alloy, and a mixed alloy amorphous thereof.

(6) Supplement As apparent from the exemplary embodiments described above, the noise suppression component of the present disclosure may further include the following configurations.

  First, in the noise suppression component of the present disclosure, the insulating portion has a tubular portion formed of a tubular body made of an electrically insulating resin film, and the tubular portion has a through hole in the through direction of the through hole. May be arranged so as to penetrate the cylindrical portion so that a conductor can be inserted into the inner peripheral side of the cylindrical portion.

  According to the noise suppression component configured as described above, the insulating portion includes the above-described tubular portion. Therefore, abrasion can be suppressed by the cylindrical portion, and the mechanical strength of the insulating portion can be increased as compared with the case where the insulating portion is constituted by the elastomer portion alone. Therefore, high electrical insulation can be ensured.

  In the noise suppression component as described above, for example, a polyimide film or the like can be used as the electrically insulating resin film constituting the cylindrical portion. As such a resin film, a resin film that has been formed into a tubular shape in advance may be used, or a resin film that has been formed into a sheet shape may be rolled into a tubular shape. When the sheet is rolled into a cylindrical shape, the sheet may be rounded so that both ends in the circumferential direction overlap with each other, whereby a cylindrical body having no gap over the entire outer peripheral surface can be formed. If it has been previously formed into a cylindrical shape, it can be placed alone in a mold. When the sheet is rolled into a cylindrical shape, the both ends in the circumferential direction may be joined by a method such as adhesion or welding, or the sheet may be rolled into a cylindrical shape, and then the through hole of the core portion may be formed. , The tubular state may be maintained on the inner peripheral surface of the core portion.

  Further, in the noise suppression component of the present disclosure, the elastomer portion has a concave portion at a position away from a portion through which the conductor is passed, and at a portion entering the inside of the concave portion, the surface of the core portion is exposed to the outside. Is also good.

  According to the noise countermeasure component configured as described above, the surface of the core portion is exposed to the outside at the portion that enters the inside of the concave portion. Therefore, even if an object comes into contact with the noise suppression component, the possibility that the object comes into contact with the surface of the core portion exposed to the outside can be reduced, and such an object and the core portion are electrically connected. Can be suppressed. Further, since such a concave portion is provided at a position away from a place where the conductor is passed, it is possible to reduce the possibility that the conductor enters the inside of the concave portion and comes into contact with the surface of the core portion exposed to the outside. It is possible to suppress electrical connection between the conductor and the core.

  Incidentally, in order to prevent the above-described conductor or any object from contacting the surface of the core portion, a configuration in which the surface of the core portion is completely covered with the elastomer portion may be considered. However, in this case, it is necessary to completely separate the surface of the core portion from the inner surface of the mold in order to mold the elastomer portion in the mold. It is necessary to support the core part by an appropriate method. In this regard, if the concave portion as described above is provided, the inner surface of the mold can be brought into contact with the core portion by using a portion where the surface of the core portion is exposed to the outside. Can be easily positioned. Therefore, the relative position between the core and the elastomer can be set to the positional relationship as designed, and the elastomer can be easily shifted or inclined to a position biased with respect to the elastomer during molding of the elastomer. The insulation performance of the part can be exhibited as designed.

  Further, in the noise suppression component of the present disclosure, the core portion is provided with a positioning portion that comes into contact with the mold when the core portion is disposed in the mold for molding the elastomer portion. The relative position between the core portion and the mold may be configured to be positionable by being brought into contact with the mold, and may be exposed to the outside at a location where the positioning portion enters the inside of the concave portion.

  According to the noise countermeasure component configured as described above, the positioning portion provided in the core portion is exposed to the outside at a portion that enters the inside of the concave portion. Therefore, when the inner surface of the mold is brought into contact with the core portion by using the portion where the surface of the core portion is exposed to the outside, the relative position between the core portion and the mold can be positioned by contacting the positioning portion and the mold. . Therefore, if such a positioning portion and a concave portion are provided, the relative position between the core portion and the elastomer portion can be easily brought into a positional relationship as designed, and the insulation performance of the elastomer portion can be exhibited as designed. .

  1, 41, 51, 61: noise suppression parts, 3: core part, 5: insulating part, 7: through hole, 11: elastomer part, 13: cylindrical part, 15: groove, 17: passage, 21: projection, 23 ... recess, 301 ... first mold, 302 ... second mold, 303 ... third mold, 31 ... passage forming protrusion, 33 ... recess formation protrusion, 35 ... electronic component, 37 ... lead, 43: positioning portion, 53: sub-recess, 55: sub-recess forming projection.

Claims (4)

A core portion made of a magnetic material and having a shape having a through hole,
When the conductor for power or communication is inserted into the through-hole, the conductor and the core portion are interposed between the conductor and the core portion so that the conductor and the core portion are formed of an electrically insulating material. And an electrically insulating part that can be electrically insulated.
The insulating section is
An elastomer portion made of an elastomer material ,
A tubular portion made of a tubular body made of an electrically insulating resin film,
Has,
The tubular portion is disposed at a position penetrating the through hole, and both ends of the tubular portion protrude from both ends in the through direction of the through hole to the outside of the through hole,
The elastomer portion includes a portion provided on an inner peripheral side of the tubular portion, a portion provided on an outer peripheral side of the core portion, and a penetration direction of the through hole with the core portion and the tubular portion interposed therebetween. Portions provided at positions on both sides hold the core portion and the cylindrical portion by being integrally molded,
When the conductor is inserted into the through hole, the conductor is inserted into the inner peripheral side of the tubular portion, the elastomer portion is elastically deformed to apply pressure to the conductor, A noise suppression component configured to be able to suppress the core portion from sliding down along the conductor by its own weight. The noise suppression component according to claim 1,
The noise suppression component , wherein the cylindrical portion is made of polyimide or polyphenylene sulfide . The noise suppression component according to claim 1 or 2,
The elastomer portion has a recess at a position away from a place where the conductor is passed,
A noise suppression component in which the surface of the core portion is exposed to the outside at a location that enters the inside of the concave portion. The noise suppression component according to claim 3,
The core portion is provided with a positioning portion that comes into contact with the mold when the core portion is arranged in a mold for molding the elastomer portion, and by contacting the positioning portion with the mold. A noise suppression component configured to be capable of positioning a relative position between the core portion and the mold, and is exposed to the outside at a position where the positioning portion enters the inside of the concave portion.

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