JP2007005751A - Ferrite core holder and installation structure of ferrite core electrode holder to cable connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To allow an installation to a cable easy and to allow it to fix the terminal of the cable integrally with a connector. <P>SOLUTION: The main part 10 of a ferrite core holder for mounting a ferrite core for electromagnetic noise countermeasure at the cable connected to an electric and electronic apparatus through the connector is formed in electrode holder splits 12 and 12 which sandwich the cable 100. Ferrite core holder 14 is formed which holds the above ferrite core in each electrode holder splits 12 and 12 formed in the shape of the splits 20 and 20, respectively, and the ferrite core splits 20 and 20 are held as formed in the shape of the splits so that the cable 100 may be inserted into these ferrite cores holder 14. A connector mounting part 30 engaged with the connector connected to the terminal of the above cable to be able to be engaged or disengaged is formed in one side of these main part 10 of the holder. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a ferrite core holder for attaching a ferrite core to a cable connected to an electric / electronic device via a connector, and more particularly, engages with a connector connected to a terminal portion of the cable and emits from the cable. The present invention relates to a ferrite core holder for attaching a ferrite core for preventing electromagnetic noise generated and a structure for attaching the ferrite core holder to a connector.

  In recent years, in-vehicle devices have increased in diversity, and high performance and multi-functionality have been rapidly promoted. Power cables and signal transmission cables are connected to these individual devices via connectors, The engine room is routed in the state of a wire harness in which a plurality of cables are gathered. Conventionally, these cables generate relatively high-frequency common mode noise generated from the metal casing and internal substrate of the device, and relatively low-frequency normal mode noise generated by the switching operation of electric devices such as motors and fans. Accordingly, it is known that the cable itself acts like an antenna to emit radiation noise or receive noise and adversely affect control of peripheral devices.

  As a countermeasure against such noise, for example, as shown in FIG. 7, a cable 100 is inserted into a cylindrical ferrite core 60 and further wound by one or several turns to suppress radiation noise. Methods as described are known.

  For example, as shown in FIG. 8, a ferrite core is connected to two cables 100 and 100 that connect a vehicle-mounted motor 200 that is switching-controlled according to a surrounding environment such as temperature and a battery 220 for supplying power via a connector 110. In order to mount 60, 60, first, as shown in FIG. 7 (a), the cable 100 is inserted into the ferrite core 60, wound one or more turns, and then bent as shown in FIG. 7 (b). In this method, a tape is wrapped around this to cover and fix. For example, in order to attach the ferrite core 60 to the two cables 100 and 100, it is necessary to repeat this operation twice.

  Such an attachment method requires a complicated process such as winding the cable 100 around the ferrite core 60 or fixing it with a tape, and the workability is poor. Further, there is a restriction that the ferrite core 60 must be fixed to the cable 100 before connecting the connector 110 to the cable 100. Furthermore, the ferrite core 60 is fixed to an intermediate part of the cable 100, and there is a problem that a defect occurs in the wiring due to the arrangement with peripheral devices and cables.

  Therefore, as a method of attaching such a ferrite core for electromagnetic noise prevention to a cable, for example, as shown in Patent Document 2, the cylindrical ferrite core is divided into a semi-cylindrical shape, and a pair of semi-cylindrical members is formed. There is a method of attaching a cable with a ferrite core.

  However, if the ferrite core 60 is only attached to the cable 100 and there is no other fixing means, a load is applied to the connection portion between the cable 100 and the connector 110 due to the weight of the ferrite core 60, and in an extreme case. May cause poor contact between the cable 100 and the connector 110. In particular, when a ferrite core is attached to an in-vehicle cable, there is a problem that even if it is in a good state at the beginning of installation, it may fall off due to vibration, impact, etc. in the process of use. .

JP 2002-343620 A JP 2000-306735 A

  Therefore, the problem to be solved by the present invention is that it can be easily attached to a cable connected to an electrical / electronic device via a connector, and can be fixed integrally with the connector to the end of the cable, and its noise removing effect is effective. It is an object of the present invention to provide a ferrite core holder and a mounting structure for the ferrite core to be exhibited.

  In order to solve the above problems, a ferrite core holder according to claim 1 of the present invention is a ferrite core holder in which a ferrite core for electromagnetic noise countermeasures is attached to a cable connected to an electrical / electronic device via a connector. The holder main body is formed in the holder halves sandwiching the cable, and each of the holder halves is provided with a ferrite core accommodating portion for accommodating the ferrite core for electromagnetic noise countermeasures. A ferrite core half that is formed in half so as to sandwich the cable is accommodated, and on one side of this holder body, a connector attached to be removably engaged with a connector connected to the end of the cable The gist is that a member is provided.

  According to a second aspect of the present invention, there is provided a ferrite core holder according to the first aspect of the present invention, wherein the ferrite core half of the ferrite core holder of the first aspect accommodated in the ferrite core housing portion of each of the half halves is connected to one connector. The gist of the present invention is that a plurality of cable receiving grooves corresponding to the number of cables are provided so as to tightly surround and surround each surface of the plurality of cables with the plurality of connected cables interposed therebetween.

  The ferrite core holder according to claim 3 is the ferrite core holder according to claim 1 or claim 2, wherein each of the holder halves is integrally connected to each other via a hinge. Is a summary.

  Further, the holder main body and the connector mounting portion are configured as separate members, and one side of a connector mounting member that detachably engages the holder main body and the connector is detachably engaged with the connector. The connector engaging member may be provided, and the other side of the connector mounting member may be provided with a holder main body engaging portion that is detachably engaged with an engaging portion provided on the holder main body.

  Furthermore, the ferrite core mounting structure according to the present invention is a structure for mounting a ferrite core holder to a cable connector in which a ferrite core for electromagnetic noise countermeasures is attached to a cable connected to an electrical / electronic device via a connector. The ferrite core holder has a ferrite core housing portion in each of the holder halves sandwiching the cable, and a ferrite core half body formed in a half shape so as to sandwich the cable in the ferrite core housing portion The gist of the invention is that the attachment portion of the connector housed and provided on one side of the holder main body is integrally attached by being engaged with the connector connected to the end of the cable.

  The ferrite core holder mounting structure according to another aspect of the present invention is such that the ferrite core holder is configured as a separate member for a holder body and a connector mounting member, and the holder body is a holder half that sandwiches the cable. Each of which has a ferrite core housing portion, and a ferrite core half body formed in a half shape so as to sandwich the cable is housed in the ferrite core housing portion, and is provided on one side of the connector mounting member. A coupling portion is detachably engaged with the connector, and a holder main body locking portion provided on the other side of the connector mounting member is removably locked to a connector mounting member locking portion provided on the holder main body. The gist is that they are integrally attached.

  According to the ferrite core holder of the first aspect, when the ferrite core for electromagnetic noise countermeasure is attached to the cable connected to the electrical / electronic device via the connector, A connector provided on one side of the holder body, in which the ferrite core housing part is formed so that a half ferrite core half body that is mounted so as to sandwich the cable is housed, and the cable is sandwiched between each holder half body. It is locked and fixed to a connector connected to the cable terminal via the mounting portion. Therefore, since the ferrite core housed in the holder body surrounds the cable in close contact with the surface thereof, not only there is no gap between the cable and the ferrite core, but also the electricity connected through the connector of the cable terminal. -The ferrite core can be fixed at the position closest to the electronic equipment. Therefore, the noise removal action of the ferrite core can be maximized, and the noise generated from the device can be efficiently removed.

  According to the second aspect of the present invention, the ferrite core holder can be attached to a plurality of cables at the same time. Therefore, the attaching operation becomes easy and the assembling workability is good.

  In addition, if the holder halves of the holder body are integrally formed by connecting one side via a hinge as in the invention described in claim 3, not only can the number of parts be reduced. The installation is also easy.

  If the holder main body and the connector mounting portion are configured as separate members, the connector mounting member is used as a connecting member between the holder main body and the connector, and the connector engaging portion provided on one side thereof is It can be integrated by engaging with the connector and releasably engaging the holder main body engaging portion provided on the other side with the connector mounting member engaging portion of the holder main body. In this case, the holder main body can be attached to the connectors having different shapes simply by exchanging the connector attachment members. That is, it is only necessary to prepare various types of connector attachment members corresponding to the connectors having various shapes, and the holder body can have versatility.

  According to the ferrite core mounting structure of claim 5, the ferrite core for electromagnetic noise countermeasure can be integrally fixed to the connector connected to the end of the cable, and the halved ferrite core is the most of the device. It can be attached close to the cable. Therefore, a high effect as a noise filter can be exhibited. Also, when attaching the ferrite core to the cable, there is no need for troublesome operations such as insertion, winding, and tape fixing, and the ferrite core can be attached even after the cable is connected to the connector. If necessary, the ferrite core can be easily attached to the cable. In addition, since the ferrite core holder is fixed integrally with the connector, it is hardly affected by vibration, impact, etc., and a good mounting state is maintained.

  Further, according to the ferrite core mounting structure in which the ferrite core holder is configured as a separate member of the holder main body and the connector mounting member, the holder main body is attached to the connector via the connector mounting member which is a connecting member, and the ferrite core Can be attached to the cable. Thus, it is not necessary to replace the entire ferrite core holder according to the shape of the connector, and the ferrite core can be attached to the cable by replacing only the connector mounting member. Accordingly, the ferrite core can be attached very easily and reliably. Furthermore, according to such a ferrite core mounting structure, it is possible to remove electromagnetic noise very efficiently by integrally mounting the ferrite core to a connector provided closest to the device.

  Embodiments of the present invention will be described below in detail with reference to FIGS. FIG. 1A is an exploded perspective view of a ferrite core holder 1 according to the first embodiment of the present invention. FIG. 1B is a cross-sectional view taken along line AA of the holder body 10 of the ferrite core holder 1.

  The ferrite core halves 20 and 20 accommodated in the ferrite core holder 1 are generally known in which metal oxide powders such as zinc oxide, nickel oxide, manganese oxide, and iron oxide are mixed and molded and fired. For example, semi-cylindrical cable receiving grooves 22 and 22 are formed on the facing abutment surface 26 so as to tightly surround and surround the cable surface with two cables arranged in between. Yes. A notch 24 is formed between the cable housing grooves 22, 22, and engages with a ferrite core engaging piece 14 </ b> C provided in the ferrite core housing portion 14 of the holder body 10 to halve the body. The ferrite core 20 is prevented from dropping out of the ferrite core housing portion 14.

  Examples of the ferrite core halves 20 and 20 include a Mn—Zn ferrite material having a high noise removal effect at a low frequency band, and a Ni—Zn ferrite material having a high noise removal effect at a high frequency band. It is possible to select appropriately according to the frequency band of the noise to be removed. In addition, a Mn—Zn ferrite core is used for one of the holder halves 12 and 12 of the holder body, and a Ni—Zn one is used for the other. It is also possible to correspond to the frequency.

  The ferrite core holder 1 is integrally formed of a synthetic resin material, and holder halves 12 and 12 are formed by halving a holder body 10 having a ferrite core housing portion 14 for housing the ferrite core half 20. And a connector mounting portion 30 detachably engaged with a connector connected to the cable, and mounting auxiliary pieces 32 and 32 for guiding the engagement between the connector and the ferrite core holder 1.

  The ferrite core holder 1 is formed so that the holder halves 12 and 12 in which the ferrite core housing portion 14 for housing the ferrite core halved body 20 is formed are connected by a hinge 16 so as to be opened and closed. In the ferrite core housing portion 14, a ferrite core locking piece 14c for locking the ferrite core 20 is formed at the tip of a flexible thin wall 14b. In addition, a part of the bottom wall of the ferrite core housing portion 14 is cut inward, and a flexible pressing piece 14a is also formed. When the ferrite core halves 20 and 20 enclose the cable, the pressing piece 14a is formed so that a gap does not occur between the butted surfaces 26 and between the cable surface and the cable housing groove 22. It acts to hold down the halves 20 and 20.

  The holder halves 12, 12 are fitted with fitting protrusions 12 c for fitting the sides of the holder halves 12, 12 not connected by the hinges 16, 16 to fix the holder halves 12, 12 in a closed state. The pawls 12b are provided at corresponding positions.

  Similarly, semicircular cable insertion notches 12a and 12a are provided at positions corresponding to the cable receiving grooves 22 and 22 of the ferrite core halves 20 and 20, and the holder main bodies 12 and 12 overlap each other. When fixed, the cable is inserted through the ferrite core halves 20 and 20.

  Furthermore, a connector mounting portion 30 is formed on one side of one of the holder halves 12 and 12 forming the pair. The connector attachment portion 30 includes a connector engagement piece 34 and attachment auxiliary pieces 32 and 32. On one side of the holder halved body 12, mounting auxiliary pieces 32, 32 formed along the outer side wall of the connector 110 connected to the cable 100 shown in FIG. The engagement between the connector 110 and the ferrite core holder 1 is guided to assist the fixing of the ferrite core holder 1 to the connector 110. Then, below the center of the surface of the holder half 12 where the attachment assisting pieces 32, 32 are formed, it engages with the connector 110 so that the ferrite core holder 1 is integrated with the connector 110 at the end of the cable 100. A connector engaging piece 34 for fixing is extended. This connector engaging piece 34 is provided at the tip of a flexible connector engaging piece support 34a, and is used for pulling out the connector 110 protruding from the lower surface of the connector 110 facing the upper lock arm 110a. The catch piece 130 can be locked.

  A state in which the ferrite core 20 is fitted in the ferrite core housing portion 14 is shown in FIG. The ferrite core halves 20 and 20 protrude slightly upward from the end surfaces of the outer walls of the holder halves 12 and 12 and are accommodated in the ferrite core accommodating portions 14 and 14. When the cable is closed and overlapped and fixed, it has a structure that is more intimately attached to the cable.

  FIGS. 3A to 3C show how the ferrite core holder 1 is attached to the two cables 100 and 100 connected to the connector 110. FIG. FIG. 4 is a sectional view taken along the line B-B of the engaging portion between the ferrite core holder 1 and the connector 110.

First, as shown in FIG. 3A, the cables 100 and 100 connected to the connector 110 are placed in the cable receiving grooves 22 and 22 of the ferrite core half 20 accommodated in one holder half 12. Then, the other holder main body 12 is rotated via the hinge 16, the holder halves 12, 12 are closed, and the fitting claws 12b and the fitting projections 12c are fitted and fixed.

  When the ferrite core holder 1 thus attached to the cables 100, 100 is slid in the direction of the connector 110 as shown in FIG. 3B, first, the auxiliary mounting pieces 32, 32 reaches the position of the outer side wall 132 of the connector 110. At this time, since the auxiliary locking pieces 32 and 32 provided on one side of the holder half 12 are formed so as to rub against the side surfaces 132 and 132 of the connector 110, the ferrite core holder 1 is connected to the connector 110. It can be guided to the correct locking position.

  Further, when the ferrite core holder 1 is slid in the direction of the connector 110, the hook piece 130 formed at the lower end of the connector 110 contacts the connector engaging piece 34 extending from the one side of the holder body 12. Touch. Then, the flexible connector engaging piece support portion 34 a is pressed downward to bend, and passes above the connector locking piece 34.

  Then, as shown in FIG. 3C, when reaching the position where the end face of the connector 110 and the end face of the holder body 12 come into contact, the connector engaging piece support portion 34a returns to the original position and is formed at the tip thereof. The connector engaging piece 34 thus brought into contact with the hook piece 130 restricts the movement of the ferrite core holder 1 in the direction away from the connector 110, and fixes the ferrite core holder 1 to the connector 110. At this time, when the ferrite core holder 1 is locked to the connector 110, the auxiliary locking pieces 32, 32 of the ferrite core holder 1 regulate the movement of the ferrite core holder 1 in the lateral direction and the oblique direction, and the ferrite core holder 1 The core holder 1 is prevented from being detached from the connector 110.

  FIG. 5 is a perspective view of the ferrite core holder 2 according to the second embodiment of the present invention. In the first embodiment, the holder halves 12 and 12 that are connected and integrally formed via the hinge 16 are divided and formed separately in the present embodiment. Then, two pairs of fitting claws 12b and fitting projections 12c are provided on the periphery of the abutting surface to which the holder halves 12 and 21 forming a pair are overlapped and fixed. These are engaged with each other, and the ferrite core halves 20 and 20 are fixed with the cable sandwiched therebetween, and can be attached to the cable. Thus, if the holder halves 12 and 12 are formed separately, for example, when the ferrite core holder 2 is attached to the cable, there is a space limitation, and the holder body 12 is rotated to open and close. Even when this is not possible, it is possible to engage the halved holder main bodies 12 and 12 that make a pair from right above.

  FIGS. 6A and 6B are perspective views showing a process of mounting the ferrite core holder 3 according to the third embodiment of the present invention on the cables 100 and 100 connected to the connector 110. FIG.

  As shown in FIG. 6A, the ferrite core holder 3 includes a holder body 10b and a connector mounting member 30a as separate members.

  The holder body 10b is formed of holder halves 12 and 12 that accommodate ferrite core halves, and these ferrite core halves and holder halves 12 and 12 are the first or second embodiment. It has almost the same configuration. Connector mounting member locking bosses 18 are provided on both side surfaces of either one of the pair of holder halves 12, 12. The holder halves 12 and 12 are attached to the cables 100 and 100 that are engaged with each other with the cables 100 and 100 interposed therebetween and connected to the connector 110.

  On the other hand, a connector attachment member 30a is disposed between the holder body 10b and the connector 110. The connector mounting member 30a includes a connector engaging portion 30b that engages with the connector 110 on one side, and a holder main body locking portion 30c that engages with the holder main body 10b on the other side.

  The connector attachment member 30a includes a connector engagement hole 34a that engages with a hook piece 130 provided in the connector 110, and attachment auxiliary surfaces 32a and 32a. The connector engaging hole 34 a is provided at a position where the connector engaging hole 34 a is engaged with a pulling piece 130 for pulling out the connector 110 protruding from the connector 110. The auxiliary mounting surfaces 32a and 32a are formed along the outer side wall of the connector 110, guide the engagement between the connector 110 and the connector mounting member 30a, and after the engagement, the connector of the connector mounting member 30a. Assist in fixing to 110.

  Furthermore, the holder engaging portion 30c of the connector mounting member 30a includes boss holes 38, 38 provided at the tips of the protruding portions extending from the connector engaging portion 30b. The projecting portions are provided to face each other at substantially the same interval as the width of the holder body 10b, and the boss holes 38, 38 provided at the tips thereof are connected to the connector mounting member locking bosses 18, 18 of the holder body 10b. Engage.

  As shown in FIG. 6B, by sliding the holder body 10b and the connector mounting member 30a in the direction of the connector 110, the connector mounting member 30a is guided by the mounting auxiliary surfaces 32a and 32a. The hook piece 130 and the connector engaging hole 34a of the connector mounting member 30a are engaged. Further, the connector attachment member locking bosses 18 and 18 provided in the holder main body 10b and the boss holes 38 and 38 provided in the connector attachment portion 30b are engaged. As a result, the connector mounting member 30a and the connector 110 are locked together, and the connector mounting member 30a and the holder body 10b are locked together. In this way, the ferrite core provided in the holder body 10b is easily attached integrally to the cables 100 and 100 attached to the connector 110 while the connector 110 and the holder body 10b are locked.

  As described above, the ferrite core holder according to the present invention can be fixed to the connector connected to the end of the cable, and the half ferrite core can be attached to the cable in close proximity to the device. Therefore, a high effect as a noise filter can be exhibited. Also, when attaching the ferrite core to the cable, there is no need for troublesome operations such as insertion, winding, and tape fixing, and the ferrite core can be attached even after the cable is connected to the connector. If necessary, the ferrite core can be easily attached to the cable.

  Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention. For example, in the present embodiment, an example in which two cables are arranged side by side is shown, but the number of cables may be one or two or more.

  In addition, the ferrite core holder according to the present invention can be attached not only to a cable connected to a power connector such as a motor but also to a signal line such as a differential electric wire. In addition, any cable connected to the connector can be preferably used.

  The ferrite core holder according to the present invention can be suitably used as, for example, an automobile wire harness as a ferrite core holder that can be fixed to a connector connected to the end of a cable and is very easy to mount.

(A) is a 1st embodiment of the present invention and is an exploded perspective view of a ferrite core holder. (B) is AA sectional drawing of the holder main body of this ferrite core holder. FIG. 2 is a perspective view of a state in which a ferrite core is fitted to the ferrite core holder shown in FIG. 1. (A)-(c) is the perspective view which showed the process in which the said ferrite core holder is mounted | worn with the cable connected to the connector. It is a BB cross section arrow view of the engaging piece of the ferrite core holder and the engaging part of the connector which were mutually engaged. It is a perspective view of the ferrite core holder of the 2nd embodiment concerning the present invention. It is the perspective view which showed the process of mounting | wearing the cable connected to the connector with the ferrite core holder of the 3rd Embodiment which concerns on this invention. (A), (b) It is a figure which shows the attachment method to the cable of the conventional ferrite core. It is the schematic diagram which attached the conventional ferrite core to two cables which connect a vehicle-mounted motor and a battery for power supply.

Explanation of symbols

1, 2, 3 Ferrite core holder 10, 20, 30 Holder body 12, 12 Holder half 12b Fitting claw 12c Fitting protrusion 14 Ferrite core housing 16 Hinge 18 Connector mounting member locking boss 20 Ferrite core 30 Connector mounting Portion 30a Connector mounting member 32, 32a Mounting auxiliary piece 34 Connector locking mating piece 34a Connector engaging hole 38 Boss hole 100 Cable 110 Connector 130 Hooking piece

Claims (6)

  A ferrite core holder in which a ferrite core for electromagnetic noise countermeasure is attached to a cable connected to an electric / electronic device via a connector, wherein the holder body is formed in a holder half that sandwiches the cable, and each holder half Each body is provided with a ferrite core housing portion for accommodating the ferrite core for electromagnetic noise countermeasure, and a ferrite core half body formed in a half shape so as to sandwich the cable between the ferrite core housing portions is housed, A ferrite core holder characterized in that a connector mounting portion is provided on one side of the holder main body so as to be detachably engaged with a connector connected to the end of the cable.   The ferrite core halves housed in the ferrite core housing portions of the halves are in close contact with and surrounded by the surfaces of the plurality of cables with a plurality of cables connected to one connector interposed therebetween. 2. The ferrite core holder according to claim 1, further comprising a plurality of cable receiving grooves corresponding to the number of cables.   3. The ferrite core holder according to claim 1, wherein each of the holder halves is integrally formed so as to be openable and closable via a hinge.   The holder main body and the connector mounting portion are configured as separate members, and one side of a connector mounting member that removably engages the holder main body and the connector is removably engaged with the connector. A connector engaging portion is provided, and on the other side of the connector attaching member, a holder body engaging portion that is detachably engaged with a connector attaching member engaging portion provided on the holder body is provided. The ferrite core holder according to any one of claims 1 to 3. A ferrite core holder mounting structure for attaching a ferrite core for electromagnetic noise countermeasures to a cable connected to an electrical / electronic device via a connector,
The ferrite core holder has a ferrite core housing portion in each of the holder halves that sandwich the cable, and a ferrite core half that is formed in a half shape so as to sandwich the cable is housed in the ferrite core housing portion. A ferrite core mounting structure, wherein a mounting portion of a connector provided on one side of the holder main body is integrally attached by being engaged with a connector connected to the end of the cable. A ferrite core holder mounting structure for attaching a ferrite core for electromagnetic noise countermeasures to a cable connected to an electrical / electronic device via a connector,
The ferrite core holder is configured as a separate member for the holder main body and the connector mounting member, and the holder main body has a ferrite core housing portion in each of the holder halves sandwiching the cable, and the ferrite core housing portion has a cable. A ferrite core half that is formed in half so as to sandwich the connector, and a connector engaging portion provided on one side of the connector mounting member is detachably engaged with the connector, and the connector mounting member A ferrite core mounting characterized in that a holder main body locking portion provided on the other side is integrally attached by being detachably locked to a connector mounting member locking portion provided on the holder main body Construction.

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