JP2007266214A - Noise absorber - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a noise absorber capable of protecting a cable against a hard core. <P>SOLUTION: The noise absorber 1 is provided, which includes a case 2, and the core 3 incorporated in the case 2 and having a through hole into which the cable can be inserted. The case 2 of the noise absorber 1 has a first case part for covering part of the core 3, a second case part 2 for covering the other part of the core 2, and a first protective cover part and a second protective cover part provided in the through hole for inhibiting the contact of the cable with the core 2. The core 2 is two-divided on a cross section approximately parallel to an axial direction of the through hole, and is constituted of a first core part 50 equipped with a first contact surface 51 and a second contact surface 52 axially extending, and a second core part 60 equipped with a third contact surface 61 in contact with the first contact surface 51 and a fourth contact surface 62 in contact with the second contact surface 52. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a noise absorber, and more particularly to a noise absorber attached to a power cable.

2. Description of the Related Art Conventionally, in a power cable of an electronic device, a noise absorbing device including a ferrite core is attached to the power cable in order to remove noise generated from the power source. Specifically, the power cable is inserted into the through hole of the ferrite core in which the through hole is formed, and the ferrite core is positioned and held on the power cable in a case such as resin so that the ferrite core does not move relative to the power cable. (For example, refer to Patent Document 1).
JP 2005-150561 A

  As described above, the conventional noise absorber employs a structure in which the power cable is directly held by the core using the case. Since the core is manufactured by sintering ferrite or the like, the core is harder than a resin coating generally used as a coating for the power cable. Therefore, for example, when the corner of the core abuts on the power cable, the power cable is There was a risk of being damaged.

  Further, the core may provide conductivity depending on the required performance, and if the power cable is damaged in this case, there is a risk of short-circuiting. Therefore, an object of this invention is to provide the noise absorber which can protect a cable from a hard core.

  In order to solve the above-described problems, the present invention provides a noise absorbing device including a case and a core having a through-hole built in the case and capable of inserting a cable. The case of the noise absorbing device includes a first case part that covers a part of the core, a second case part that covers the other part of the core, and a protection that prevents the cable from contacting the core by being disposed in the through hole. And a cover. The core is divided into two parts in a cross section substantially parallel to the axial direction of the through-hole, and the first core part provided with the first contact surface and the second contact surface extending in the axial direction is contacted with the first contact surface. A third abutting surface and a second core portion provided with a fourth abutting surface that abuts against the second abutting surface.

  According to such a configuration, the core can be protected by the case, and the protective cover can be interposed between the core and the cable. Therefore, the contact between the core and the cable is prevented by the protective cover.

  In the noise absorbing device having the above-described configuration, the case is divided into two in a cross section substantially parallel to the axial direction to provide a first case portion and a second case portion, and the first core portion is accommodated in the first case portion. A second core part is accommodated in the second case part, and the protective cover includes a first protective cover part configured integrally with the first case part, and a second protective cover part configured integrally with the second case part It is preferable that it is comprised from these.

  According to such a configuration, the noise absorbing device includes four parts: a first case part and a first protective cover part, a second case part and a second protective cover part, a first core part, and a second core part. And the number of components can be reduced. Therefore, the assembly of the noise absorbing device is facilitated.

  In addition, the first case portion is composed of a first split case portion that accommodates one end side in the axial direction of the first core portion, and a second split case portion that accommodates the other end side in the axial direction of the first core portion. The second case portion includes a third divided case portion that accommodates one end side in the axial direction of the second core portion, and a fourth divided case portion that accommodates the other end side in the axial direction of the second core portion. It is preferable.

  The first protective cover part is composed of a first divided protective cover part integral with the first divided case part, and a second divided protective cover part integral with the second divided case part. It is preferable that the third divided protective cover portion is integrated with the three divided case portion, and the fourth divided protective cover portion is integrated with the fourth divided case portion.

  According to such a configuration, for example, when the first core portion is disposed between the first case portion and the first protective cover portion, the first split case portion and the second split case portion are separated from each other. A 1st core part can be arrange | positioned between a 1st case part and a 1st protective cover part. Therefore, arrangement | positioning in the 1st case part of a 1st core part becomes easy.

  In addition, a first hinge portion is provided between the first divided case portion and the third divided case portion to connect the first divided case portion and the third divided case portion, and the second divided case portion and the fourth divided case portion. A second hinge portion is provided between the first split case portion and the fourth split case portion. The second split case portion is positioned opposite to the first hinge portion with respect to the axis of the through hole in the first split case portion. Has a first hook portion, and a first hook receiving portion engageable with the first hook portion is provided at a position opposite to the first hinge portion with respect to the axial center of the through hole in the third divided case portion. A second hook portion is provided at a position opposite to the second hinge portion with respect to the axial center of the through hole in the fourth divided case portion, and opposite to the second hinge portion with respect to the axial center of the through hole in the second divided case portion. A second hook receiving portion that can be engaged with the second hook portion is provided at the side position. It is preferred that substantially configured in the same shape as the first divisional casing part the second divisional casing part with substantially configured in the same shape and the fourth split case portion and the third split case portion.

  According to such a configuration, a part of the case including the first split case part and the third split case part and the other part of the case including the second split case part and the fourth split case part have the same shape. be able to. Therefore, it is possible to create all of the parts constituting the case with one mold.

  The first divided case portion and the third divided case portion are closed with the first hook portion engaged with the first hook receiving portion with the first hinge portion as a fulcrum, and the second divided case portion and the fourth divided case portion. And the second hook portion is engaged with the second hook receiving portion and closed with the second hinge portion as a fulcrum, and the core is accommodated in the case. In this state, a first pressing piece capable of urging the core toward the third divided case portion is provided at a position facing the third divided case portion of the first divided case portion, and the second divided case portion has a second shape. A second pressing piece that can bias the core toward the fourth divided case portion is provided at a position facing the four divided case portion, and at a position facing the first divided case portion of the third divided case portion, A third pressing piece that can bias the core toward the first split case is provided, and the core can be biased toward the second split case at the position facing the second pressing piece of the fourth split case. It is preferable that a fourth pressing piece is provided.

  According to such a configuration, the first core portion and the second core portion are biased to each other with the core closed by the case. Therefore, the first core portion and the second core portion can be reliably brought into contact with each contact surface, and a closed magnetic circuit can be suitably configured.

  In addition, a first hooked portion and a second hooked portion are defined at one end side position and the other end side position in the axial direction of the first core portion, respectively, and one end side position in the axial direction of the second core portion is defined. And the other end side position respectively define a third hooked portion and a fourth hooked portion, and the first hooked portion of the first split case portion has a first hooked portion at a position facing the first hooked portion. A first latching portion that latches on the latching portion is provided, and a second latching portion that latches on the second latching portion is located at a position facing the second latching portion of the second split case portion. Provided at a position facing the third hooked portion of the third split case portion, a third hooking portion for hooking the third hooked portion is provided, and a fourth hook of the fourth split case portion is provided. It is preferable that the 4th latching part latched on the 4th to-be-latched part is provided in the position facing a latching part.

  According to such a structure, when a core is arrange | positioned in a case, each latching part can latch on each to-be-latched part. Thereby, the shift | offset | difference of the core with respect to a case can be suppressed.

  The first core portion has a first extending portion in which a first contact surface is defined at the tip position and a first extending portion in which the second contact surface is defined at the tip position in a cross section orthogonal to the axial direction. The second extending portion extending in parallel and the first connecting portion connecting the base ends of the first extending portion and the second extending portion, the second core portion has one end in a cross section orthogonal to the axial direction. The third contact surface may be defined on the side and the fourth contact surface may be defined on the other end side.

  According to such a structure, a 1st extension part and a 2nd extension part can be made into the winding location of a cable. Since both the first extending portion and the second extending portion are straight portions, the cable can be easily wound.

  The core is preferably composed of Mn—Zn ferrite as a base material. According to such a configuration, it is possible to effectively remove noise particularly in a low frequency region.

  According to the present invention, the cable can be protected from the hard core.

  Hereinafter, the noise absorber according to the first embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the noise absorbing device 1 includes a case 2 and a core 3.

  The case 2 mainly includes a first divided case portion 10, a second divided case portion 20, a third divided case portion 30, and a fourth divided case portion 40. The first divided case portion 10 is mainly composed of a first outer peripheral portion 11, a first divided protective cover portion 12, and a first side surface portion 13.

  Similarly to the first divided case portion 10, the second divided case portion 20, the third divided case portion 30, and the fourth divided case portion 40 also have a second outer peripheral portion 21, a third outer peripheral portion 31, and a fourth outer peripheral portion 41. And the second divided protective cover portion 22, the third divided protective cover portion 32, the fourth divided protective cover portion 42, the second side surface portion 23, the third side surface portion 33, and the fourth side surface portion 43, respectively. In addition, the first divided case portion 10 to the fourth divided case portion 40 are configured in substantially the same shape, and the first divided case portion 10, the fourth divided case portion 40, and the second divided case portion 20 The third divided case portion 30 is configured in the same shape. Hereinafter, the configuration of the first divided case portion 10 will be described as a representative, and the description of the configurations of the second divided case portion 20, the third divided case portion 30, and the fourth divided case portion 40 will be omitted unless specifically stated.

  The 1st outer peripheral part 11 is comprised by the half shape which divided the cylinder into 2 with the cross section parallel to an axial direction. The first divided protective cover portion 12 has a half-divided shape in which a cylinder having the same axial length as that of the cylinder of the first outer peripheral portion 11 is divided into two in a cross section parallel to the axial direction. . The first side surface portion 13 includes the first outer peripheral portion 11 and the first divided protective cover portion 12 arranged in such a manner that the respective axis centers are coaxial and the end positions are the same in the axial direction. The one end of the part 11 and the one end of the first divided protective cover part 12 are connected to each other, and are configured in a planar shape substantially orthogonal to the axial direction of the first outer peripheral part 11 and the first divided protective cover part 12. Therefore, the 1st outer peripheral part 11, the 1st division | segmentation protection cover part 12, and the 1st side part 13 are comprised substantially integrally.

  A first housing portion 10 a that houses one end of a first core portion 50 described later is formed in a portion surrounded by the first outer peripheral portion 11, the first divided protective cover portion 12, and the first side surface portion 13. Similarly, the second housing portion 20a, the third housing portion 30a, and the fourth housing portion 40a are also formed in the second split case portion 20, the third split case portion 30, and the fourth split case portion 40.

  The 1st hinge part 2C is connected to the one end part of the circumferential direction of the 1st outer peripheral part 11, and the 3rd division | segmentation case part 30 is on the opposite side of the 1st division | segmentation case part 10 regarding 1st hinge part 2C. It arrange | positions on the axis | shaft parallel to the 1st division | segmentation case part 10, and the 1st outer peripheral part 11 and the 3rd outer peripheral part 31 are connected via the 1st hinge part 2C. Similarly, the second divided case portion 20 and the fourth divided case portion 40 are connected via the second hinge portion 2D.

  A first hook portion 14 extending in the circumferential direction is provided on the other circumferential end side of the first outer peripheral portion 11 which is located on the opposite side of the first hinge portion 2C with respect to the axial center of the first divided case portion 10. The first hook portion 14 is formed with a hole 14 a penetrating in the diameter direction of the first outer peripheral portion 11.

  A first hook receiving portion 34 is provided on the circumferential end of the third outer peripheral portion 31 that is located on the opposite side of the first hinge portion 2 </ b> C with respect to the axial center of the third divided case portion 30. Therefore, the first hook receiving portion 34 is inserted into the hole 14a of the first hook portion 14 by rotating the first divided case portion 10 toward the third divided case portion 30 with the first hinge portion 2C as a fulcrum. Can be latched.

  Similarly to the first divided case portion 10, the fourth divided case portion 40 is provided with a second hook portion 44 in which a hole 44 a is formed in the fourth outer peripheral portion 41. Similar to the split case portion 30, a second hook receiving portion 24 is provided on the second outer peripheral portion 21 and can be hooked with the second hook portion 44.

  As shown in FIGS. 2 and 3, a first pressing piece 11 </ b> A is provided at a substantially central portion in the circumferential direction of the first outer peripheral portion 11, and the first pressing piece 11 </ b> A constitutes the first outer peripheral portion 11. A part of the wall is cut out and bent toward the diametrical axial center of the first outer peripheral portion 11. Therefore, in a state where the first divided case portion 10 is rotated to the third divided case portion 30 side with the first hinge portion 2C as a fulcrum, the first pressing piece 11A is disposed at a position facing the third divided case portion 30. Is done.

  In a state where the first divided case portion 10 is rotated to the third divided case portion 30 side with the first hinge portion 2C as a fulcrum, the portion that becomes the location where the first pressing piece 11A of the third outer peripheral portion 31 is opposed to A third pressing piece 31A is provided. Therefore, the first pressing piece 11 </ b> A and the third pressing piece 31 </ b> A can exert an urging force in directions facing each other.

  The fourth outer peripheral portion 41 is also provided with a fourth pressing piece 41A similar to the first outer peripheral portion 11, and the second outer peripheral portion 21 is also provided with a second pressing piece 21A similar to the third outer peripheral portion 31. Therefore, it is possible to urge in directions opposite to each other. Further, as shown in FIG. 2, the first divided case portion 10 and the second divided case portion 20 constitute the first case portion 2A, and the third divided case portion 30 and the fourth divided case portion 40, A second case portion 2B is configured.

  As shown in FIG. 3, a first hook protruding from the surface of the first side surface 13 into the first housing portion 10 a is provided in the vicinity of the substantially central position in the circumferential direction of the first divided protective cover portion 12 of the first side surface portion 13. A stop portion 13A is provided. Similarly, the second side surface portion 23, the third side surface portion 33, and the fourth side surface portion 43 are provided with a second hook portion 23A, a third hook portion 33A, and a fourth hook portion 43A, respectively. In addition, four convex portions 11B are arranged in the circumferential direction on the end surface of the first outer peripheral portion 11 on the side opposite to the first side surface portion 13, and at a position corresponding to the convex portion 11B of the third outer peripheral portion 31. Four recesses 31b are formed. Similarly, the fourth outer peripheral portion 41 is also provided with a convex portion 41B, and the second outer peripheral portion 21 is also formed with a concave portion 21b.

  As described above, the first divided case portion 10 and the fourth divided case portion 40, and the second divided case portion 20 and the third divided case portion 30 are configured in the same shape, and the first divided case portion 10 and the third divided case part 30 are connected by the first hinge part 2C, and the second divided case part 20 and the fourth divided case part 40 are also connected by the second hinge part 2D. Therefore, a part of the case 2 including the first divided case portion 10 and the third divided case portion 30 and the other portion of the case 2 including the second divided case portion 20 and the fourth divided case portion 40 are made the same mold. This makes it possible to create work, thereby improving work efficiency.

  The core 3 is made of Mn—Zn ferrite as a base material in order to effectively remove noise particularly in a low frequency region. As shown in FIG. 1, the cylinder has two cross sections parallel to the axial direction. The first core part 50 and the second core part 60 having the same shape are divided. The core 3 has a length in the axial direction substantially equal to the length in the axial direction of the case 2 and is configured so that a part of the core 3 can be housed in the first housing portion 10a to the fourth housing portion 40a. In addition, the first core portion 50 and the second core portion 60 are cut surfaces that extend in the axial direction, respectively, a first contact surface 51 and a second contact surface 52, a third contact surface 61, and a fourth contact portion. And a contact surface 62.

  On one end surface of the first core portion 50 in the axial direction, a concave first hooked portion 50a is formed at a portion that is a substantially intermediate portion in the circumferential direction of the first core portion 50 and intersects the inner peripheral surface, A second hooked portion 50b is formed on the other end surface on the opposite side of the first hooked portion 50a. Similarly, a third hooked portion 60a and a fourth hooked portion 60b are formed on one end surface and the other end surface of the second core portion 60 in the axial direction.

  In order to attach the core 3 to the case 2, for example, in the first case portion 2 </ b> A (FIG. 2), one end surface of the first core portion 50 from the divided portion of the first divided case portion 10 and the second divided case portion 20. The side and the other end surface side are inserted into the first housing portion 10a and the second housing portion 20a. In the 1st division | segmentation case part 10, when inserting the one end surface side of the 1st core part 50 in the 1st accommodating part 10a from the position used as the division | segmentation location of the 1st case part 2A, The first core portion 50 can be linearly inserted along the axial direction between the first outer peripheral portion 11 and the first outer peripheral portion 11. Similarly, in the second divided case portion 20, the other end surface side of the first core portion 50 can be inserted into the second accommodating portion 20a, and therefore the first core portion 50 is disposed in the first case portion 2A. It becomes easy. Since the 2nd core part 60 and the 2nd case part 2B are the structures similar to the 1st core part 50 and the 1st case part 2A, arrangement | positioning in the 2nd case part 2B of the 2nd core part 60 also becomes easy. .

  Moreover, since the concave first hooking portion 50a is formed on one end surface side of the first core portion 50 inserted into the first housing portion 10a of the first split case portion 10, the first covering portion is formed. The latching part 50a engages with the convex first latching part 13A protruding into the first housing part 10a. Since the second hooked portion 50b formed on the other end surface side of the first core portion 50 is similarly engaged with the second hooking portion 23A of the second split case portion 20, the first hook portion 50A is first against the first case portion 2A. The shift of the core part 50 can be suppressed. Similarly, in the second case portion 2B, the second hook portion 60a and the third hook portion 33A and the fourth hook portion 60b and the fourth hook portion 43A engage with each other. The shift of the second core part 60 with respect to the case part 2B can be suppressed.

  In the first case portion 2 </ b> A, the plurality of convex portions 11 </ b> B of the first divided case portion 10 are divided into the second divided portions with the first core portion 50 inserted in the first divided case portion 10 and the second divided case portion 20. The plurality of concave portions 21b of the case portion 20 are inserted, and similarly, the plurality of convex portions 41B of the fourth divided case portion 40 are inserted into the plurality of concave portions 31b of the third divided case portion 30, and the noise shown in FIG. The absorber 1 is assembled. Further, in this state, the first divided protective cover portion 12 and the second divided protective cover portion 22 constitute the first protective cover portion 2E, and the third divided protective cover portion 32 and the fourth divided protective cover portion 42 constitute the second divided protective cover portion 42. A protective cover portion 2F is configured. Further, the first protective cover portion 2E and the second protective cover portion 2F face each other, thereby forming a through hole into which a power cable 7 described later can be inserted.

  As shown in FIG. 4, in order to attach the noise absorber 1 to the power cable 7, the power cable 7 is disposed in the second protective cover portion 2F. Then, the first case portion 2A is turned to the second case portion 2B side with the first hinge portion 2C and the second hinge portion 2D as fulcrums, and the first hook portion 14 is hooked on the first hook receiving portion 34, and The second hook portion 44 is hooked on the second hook receiving portion 24 so that the first case portion 2A and the second case portion 2B are closed. In this state, the core 3 is protected by the case 2 and a protective cover is formed by the first protective cover portion 2E and the second protective cover portion 2F, and the protective cover is disposed between the core 3 and the power cable 7. Can be interposed. Therefore, the first protective cover portion 2E and the second protective cover portion 2F prevent the core 3 and the power cable 7 from coming into contact with each other, and damage to the power cable 7 caused by the core 3 is suppressed.

  Further, the first core portion 50 and the second core portion 60 in the state where the first case portion 2A and the second case portion 2B are closed are the first contact surface 51, the third contact surface 61, and the second contact surface. 52 and the fourth contact surface 62 are in contact with each other, and are biased in opposite directions by the first pressing piece 11A and the second pressing piece 21A, and the third pressing piece 31A and the fourth pressing piece 41A, respectively. Therefore, the first core portion 50 and the second core portion 60 can be reliably brought into contact with each other on the contact surfaces, and the closed magnetic path can be suitably configured as the core 3.

  Next, a noise absorber according to a second embodiment of the present invention will be described with reference to FIGS. Since the basic configuration of the noise absorbing device 101 according to the second embodiment is the same as that of the noise absorbing device 1 according to the first embodiment, the parts that adopt the same configuration are the first embodiment. 100 is added to the code | symbol of the noise absorber which concerns on the, and the description is abbreviate | omitted.

  As shown in FIG. 5, the noise absorbing device 101 mainly includes a case 102 and a core 103.

  The core 103 includes a first core part 150 and a second core part 160. As shown in FIG. 6, the first core portion 150 includes a first extending portion 150B in which a first contact surface 151 is defined at the tip position and a second contact at the tip position in a cross section perpendicular to the cable insertion direction. A first elongate arc is formed by connecting the base ends of the second elongate portion 150C, the contact surface 152 being defined and extending substantially parallel to the first elongate portion 150B, and the first elongate portion 150B and the second elongate portion 150C. It is comprised in the substantially U shape from the connection part 150A.

  The second core portion 160 is configured by a substantially I-shaped second connecting portion 160A in a cross section orthogonal to the cable insertion direction, and is in contact with the first contact surface 151 on one end side of the second connecting portion 160A. A possible third contact surface 161 is provided, and a fourth contact surface 162 capable of contacting the second contact surface 152 is provided on the other end side.

  As shown in FIG. 5, the case 102 has a first divided case portion 110 and a second divided case portion 120 having a substantially U-shaped cross section orthogonal to the cable insertion direction, and a substantially I-shaped third divided case. It consists of a part 130 and a fourth split case part 140.

  In the first split case portion 110, the first outer peripheral portion 111 extends from the half-divided cylindrical outer peripheral bottom portion 111A capable of protecting the first connecting portion 150A and both end portions of the outer peripheral bottom portion 111A. The first extending portion 150B and the second extending portion 150C are configured by a substantially flat first outer peripheral flat portion 111B and a second outer peripheral flat portion 111C that can protect the first extended portion 150B and the second extended portion 150C, respectively. Similarly, the first divided protective cover portion 112 includes a protective cover bottom portion 112A, a first protective cover flat portion 112B, and a second protective cover flat portion 112C.

  Also in the second divided case part 120, the second outer peripheral part 121 is composed of an outer peripheral bottom part 121A, a first outer peripheral flat part 121B, and a second outer peripheral flat part 121C, and the second divided protective cover part 122 is protected. The cover bottom portion 122A, the first protective cover plane portion 122B, and the second protective cover plane portion 122C are configured.

  A first hinge portion 102C and a second hinge portion 102D are provided at the end portion of the second outer peripheral plane portion 111C of the first outer peripheral portion 111 and the end portion of the second outer peripheral plane portion 121C of the second outer peripheral portion 121, respectively. . Further, a first hook receiving portion 114 and a second hook receiving portion 124 are provided at the end portion of the first outer peripheral plane portion 111B of the first outer peripheral portion 111 and the end portion of the first outer peripheral plane portion 121B of the second outer peripheral portion 121, respectively. Is provided.

  In the third divided case portion 130, a first hook portion 134 is provided on one end side of the third outer peripheral portion 131, and the other end side is connected to the first hinge portion 102C. Also in the fourth split case part 140, a second hook part 144 is provided on one end side of the fourth outer peripheral part 141, and the other end side is connected to the second hinge part 102D. Therefore, by rotating the third divided case portion 130 and the fourth divided case portion 140 toward the first divided case portion 110 and the second divided case portion 120 with the first hinge portion 102C and the second hinge portion 102D as fulcrums, The first hook portion 134 and the first hook receiving portion 114, and the second hook portion 144 and the second hook receiving portion 124 can be hooked.

  When a power cable (not shown) is wound around the noise absorbing device 101 having the above-described configuration, the case 2 is not closed and is disposed in the first protective cover portion 102E. Then, the cable is wound around the first outer peripheral plane portions 111B and 121B and the first protective cover plane portions 112B and 122B around the first extended portion 150B of the first core portion 150. The first outer peripheral plane portions 111B and 121B and the first protective cover plane portions 112B and 122B protecting the first extension portion 150B and the first extension portion 150B are straight sections in the cross section orthogonal to the power cable insertion direction. Therefore, the power cable can be easily wound.

  After winding a power cable (not shown), the first divided case portion 110 and the second divided case portion are configured with the third divided case portion 130 and the fourth divided case portion 140 as the fulcrum of the first hinge portion 102C and the second hinge portion 102D. The first hook portion 134 and the first hook receiving portion 114, the second hook portion 144 and the second hook receiving portion 124 are engaged with each other to close the case 102, and the noise absorbing device 101 is illustrated. Installation to the power cable is complete.

  In the noise absorbing devices according to the first embodiment and the second embodiment, the first case portion and the first protective cover portion, the second case portion and the second protective cover portion, Since the noise absorber is composed of the four parts of the core part and the second core part, it is possible to reduce the number of components, and therefore the assembly of the noise absorber is easy. Yes.

  Further, both of the noise absorbers according to the first embodiment and the second embodiment are divided by a cross section parallel to the axial direction of the through hole through which the cable is inserted. Therefore, even a cable with a diameter larger than the diameter of the through hole, for example, an outlet, is wired in the groove forming the through hole in a divided state, and the case divided later is combined with the inside of the through hole. Can be inserted.

  The noise absorber according to the present invention is not limited to the above-described embodiment, and various modifications and improvements can be made within the scope described in the claims. For example, in the first protective cover portion, the first divided protective cover portion and the second divided protective cover portion, which are integrated with the first divided case portion and the second divided case portion, respectively, are not limited thereto. A configuration in which the first protective cover portion is provided only in the first divided case portion may be employed. The same applies to the second protective cover portion. Further, in the first divided case portion, the first hooking portion is provided on the first side surface portion, but if it does not interfere with the insertion of the first core portion into the housing portion, at which position it protrudes into the first housing portion. It may be provided.

  In the second embodiment, the first core portion has a substantially U-shaped cross section. However, if the first core portion is provided with a first extension portion and a second extension portion, other shapes, For example, it may be U-shaped.

The disassembled perspective view of the noise absorber which concerns on 1st embodiment of this invention. The bottom view of the noise absorber which concerns on 1st embodiment of this invention. The side view of the core and case of the noise absorber which concern on 1st embodiment of this invention. 1 is a perspective view of a noise absorbing device according to a first embodiment of the present invention. The perspective view of the noise absorber which concerns on 2nd embodiment of this invention. The side view showing the core of the noise absorber which concerns on 2nd embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Noise absorber 2 ... Case 2A ... First case part 2B ... Second case part 2C ... First hinge part 2D ... Second hinge part 2E ... First protection cover part 2F ... Two protective cover parts 3 .. Core 7 .. Power cable 10 .. First split case part 10 a .. First housing part 11 .. First outer peripheral part 11 A .. First pressing piece 11 B. 1st division | segmentation protective cover part 13 ... 1st side part 13A ... 1st hook part 14 ... 1st hook part 14a ... Hole 20 ... Second division case part 20a ... Second accommodation part 21 ... Second outer peripheral portion 21A, second holding piece 21b, concave portion 22, second divided protective cover portion 23, second side surface portion 23A, second hooking portion 24, second hook receiving portion 30, Third divided case portion 30a ··· Third housing portion 31b · · Recess portion 31 · · Third outer peripheral portion 31 ..Third pressing piece 32..Third divided protective cover portion 33..Third side surface portion 33A..Third hook portion 34..First hook receiving portion 40..Fourth divided case portion 40a. Four accommodating portions 41 ··· Fourth outer peripheral portion 41A · · Fourth pressing piece 41B · · convex portion 42 · · fourth divided protective cover portion 43 · · fourth side surface portion 43A · · fourth latching portion 44 · · · Two hook portions 44a ·· Hole 50 · · First core portion 50a · · First hook portion 50b · · Second hook portion 51 · · First abutment surface 52 · · Second abutment surface 60 ·・ Second core portion 60a ・ ・ Third hook portion 60b ・ ・ Four hook portion 61 ・ ・ Third contact surface 62 ・ ・ Fourth contact surface

Claims (9)

Case and
A core built in the case and having a through-hole through which a cable can be inserted, and
The case includes a first case portion that covers a part of the core, a second case portion that covers the other portion of the core, and a protection that is disposed in the through hole and prevents the cable from contacting the core. A cover, and
The core is divided into two in a cross section substantially parallel to the axial direction of the through-hole, and a first core portion provided with a first contact surface and a second contact surface extending in the axial direction, and the first contact portion. A noise absorbing device comprising: a third abutting surface that abuts on the abutting surface; and a second core portion provided with a fourth abutting surface that abuts on the second abutting surface. The case is divided into two sections substantially parallel to the axial direction to provide the first case portion and the second case portion, and the first case portion accommodates the first core portion and the first case portion. The second core part is accommodated in two case parts,
The protective cover includes a first protective cover portion configured integrally with the first case portion and a second protective cover portion configured integrally with the second case portion. The noise absorber according to claim 1. The first case portion includes a first divided case portion that accommodates one end side of the first core portion in the axial direction, and a second divided case portion that accommodates the other end side of the first core portion in the axial direction. And consists of
The second case portion includes a third divided case portion that accommodates one end side of the second core portion in the axial direction, and a fourth divided case portion that accommodates the other end side of the second core portion in the axial direction. The noise absorbing device according to claim 2, comprising: The first protective cover portion includes a first divided protective cover portion integral with the first divided case portion, and a second divided protective cover portion integral with the second divided case portion,
The second protective cover part is composed of a third divided protective cover part integral with the third divided case part and a fourth divided protective cover part integral with the fourth divided case part. The noise absorber according to claim 3. Between the first divided case part and the third divided case part, a first hinge part for connecting the first divided case part and the third divided case part is provided,
Between the second divided case portion and the fourth divided case portion, a second hinge portion is provided for connecting the second divided case portion and the fourth divided case portion,
In the first split case portion, a first hook portion is provided at a position opposite to the first hinge portion with respect to the axial center of the through hole,
In the third divided case portion, a first hook receiving portion that can be engaged with the first hook portion is provided at a position opposite to the first hinge portion with respect to the axial center of the through hole,
In the fourth split case portion, a second hook portion is provided at a position opposite to the second hinge portion with respect to the axial center of the through hole,
In the second split case portion, a second hook receiving portion engageable with the second hook portion is provided at a position opposite to the second hinge portion with respect to the axial center of the through hole,
The first divided case portion and the fourth divided case portion are configured in substantially the same shape, and the second divided case portion and the third divided case portion are configured in substantially the same shape. The noise absorbing device according to claim 4. The first split case portion and the third split case portion are closed by engaging the first hook receiving portion with the first hinge portion as a fulcrum, and the second split case portion. With the fourth split case portion being closed with the second hook portion engaged with the second hook receiving portion with the second hinge portion as a fulcrum, the core is accommodated in the case. A first pressing piece capable of urging the core toward the third divided case portion is provided at a position of the one divided case portion facing the third divided case portion, and the second divided case portion has the first holding piece. A second pressing piece capable of urging the core toward the fourth divided case portion is provided at a position facing the four divided case portion.
A third pressing piece capable of biasing the core toward the first split case portion is provided at a position of the third split case portion facing the first split case portion. The noise absorbing device according to claim 5, wherein a fourth pressing piece capable of urging the core toward the second divided case portion is provided at a position facing the second pressing piece. . A first hooked portion and a second hooked portion are respectively defined at one end side position and the other end side position of the first core portion in the axial direction, and the axial direction of the second core portion is determined in the axial direction. A third hooked portion and a fourth hooked portion are respectively defined at the one end side position and the other end side position,
A position of the first divided case portion facing the first hooked portion is provided with a first hooking portion that hooks the first hooked portion,
A second hooking portion that hooks to the second hooked portion is provided at a position facing the second hooked portion of the second divided case portion,
At a position facing the third hooked portion of the third divided case portion, a third hooking portion that hooks to the third hooked portion is provided,
4. A fourth hooking portion for hooking the fourth hooked portion is provided at a position of the fourth divided case portion facing the fourth hooked portion. The noise absorbing device according to claim 6. The first core portion has a first extending portion in which the first contact surface is defined at a tip position and a second contact surface in the tip position in the cross section orthogonal to the axial direction. A second extension part extending substantially parallel to the extension part, and a first connecting part connecting the base ends of the first extension part and the second extension part,
The second core portion includes a second connecting portion in which the third contact surface is defined on one end side and the fourth contact surface is defined on the other end side in a cross section orthogonal to the axial direction. The noise absorbing device according to any one of claims 1 to 4, wherein the noise absorbing device is provided.   The noise absorbing device according to any one of claims 1 to 8, wherein the core is composed of a Mn-Zn ferrite as a base material.

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