JP4685121B2 - Noise current absorber - Google Patents

Description

  The present invention relates to a noise current absorber that surrounds an outer periphery of an electric wire with a magnetic material and absorbs a noise current flowing through the electric wire by the magnetic material.

  2. Description of the Related Art Conventionally, a noise current absorber is known in which an outer peripheral portion of an electric wire is surrounded by a magnetic core such as ferrite, and a noise current flowing through the electric wire is absorbed by the magnetic material.

  In this type of noise current absorber, the magnetic core can be easily fitted on the electric wire without removing the existing wiring. For example, as disclosed in Japanese Utility Model Publication No. 63-39997, as shown in FIG. The ring-shaped magnetic core formed by dividing the shaft into two on the dividing surface, the pair of case portions for storing the respective divided pieces of the magnetic core, and the stored divided pieces are combined into the original ring shape. As described above, a noise current absorbing tool including a holding case provided with a fixing mechanism (a protrusion and a hook that engage with each other) for fixing the pair of case portions is widely used.

  And since this kind of noise current absorber is greatly different in effect depending on the mounting position on the cable, it is necessary to fix the mounting position at an appropriate place. For this reason, the noise current absorber is provided with, for example, a locking claw or the like protruding toward the cable insertion hole at a notch portion of the case portion that forms the cable insertion hole for inserting the cable. That is, when the noise current absorber is attached to the cable, the noise current absorber is fixed to the cable by causing the locking claws to bite into the covering of the cable disposed in the notch portion of the case portion.

  By the way, in order to find a mounting position where the effect of the noise current absorber can be sufficiently obtained, it is necessary to adjust the mounting position. However, with the conventional noise current absorber that is fixed to the cable with the locking claw, when moving the mounting position, the work of opening the case part, removing it from the wire, and reattaching it to the wire must be repeated. However, there was a problem that much labor was required.

  Therefore, an object of the present invention is to provide a noise current absorber that allows easy adjustment of the mounting position in order to solve the above problems.

In order to achieve the above object, the invention according to claim 1 is a noise current absorber that is used by being attached to a cable and absorbs a noise current flowing through the cable, and is an annular magnetic body that is externally fitted to the cable. A core holding portion that holds the core and is slidable with respect to the cable, a fixing portion that is fixed in the vicinity of a socket or an outlet for connecting a plug provided on the cable, and the fixing portion is provided at one end. A long band part and a core holding part that are formed integrally with each other, and can be locked at any position on the band part or at a plurality of preset positions, When a force in the direction of pulling out the plug from the socket or outlet is applied to the cable, the core holding portion comes into contact with a peripheral portion of the plug formed in a diameter larger than the cable, and the front Limiting the movement of the cable, obtain Preparations and a connecting portion to which the plug from inadvertently said socket or outlet connecting to the core holder so as to be spaced to never fall off with the fixed portion It is characterized by that.

In the noise current absorber of the present invention configured as described above, the core holding part is attached on the cable separated from the position where the fixing part is fixed by the interval set by the connecting part.
Moreover, since the core holding portion is configured to be slidable with respect to the cable, when the interval set by the connecting portion is changed, the mounting position of the core holding portion is also moved in conjunction with this change.

Thus, according to the noise current absorber of the present invention, the mounting position of the core holding part can be easily changed without removing the core holding part, and the trouble of adjusting the mounting position of the core holding part can be reduced. It can be greatly reduced.
Further, according to the noise current absorber of the present invention, when a force in the direction of pulling out the plug is applied to the cable, the plug peripheral portion formed with a diameter larger than that of the cable comes into contact with the core holding portion, and its movement is restricted. Therefore, the plug can be prevented from falling off.

  When the magnetic core is composed of a plurality of divided pieces divided in the axial direction of the magnetic core, as described in claim 2, the core holding portion includes a case portion that stores the divided pieces, What is necessary is just to use what was comprised detachably and was equipped with the fixing mechanism which fixes a case part so that the division | segmentation piece accommodated in the case part may be combined cyclically | annularly.

  In this case, it is not necessary to insert the cable through the magnetic core in advance, and the magnetic core can be retrofitted to the cable. Therefore, the noise current absorber can be applied to various cables.

By the way, the fixing part has a shape that is mounted by elastic deformation of the fixing part with respect to the mounting hole drilled in the wall surface of the mounting object having the socket or the outlet as described in claim 3. Alternatively , as described in claim 4, it may be a sticking plate that is stuck to the wall surface of an attachment object having a socket or an outlet .

In particular, when the fixing portion is made of a sticking plate, for example, the sticking plate forms an opening for exposing a socket or an outlet formed on the attachment object. May be. In this case, the noise current absorber can be firmly fixed in the vicinity of the socket or the outlet .

In the following, the connecting portion, as in claim 6, wherein the band portion formed in an elongated shape, its arbitrary position on the band portion, or lockable to one of the pre-specified multiple locations The core holding part and the fixing part may be fixed to the band part and the other may be fixed to the locking part.

In this case, as according to claim 7, and at least one a connecting portion of the core holding portion and the fixed portion, it is preferably configured detachably. That is, if it is made detachable in this way, the core holding part and the fixing part can be attached individually and can be connected later, so that the attaching work can be facilitated. In particular, when the fixing part is fixed to the attachment object, the core holding part or the fixing part is attached to the cable or the attachment object simply by attaching / detaching the core holding part or the fixing part to the connecting part. The cable can be attached to and detached from the attachment object as it is.

Embodiments of the present invention will be described below with reference to the drawings.
[First Embodiment]
As shown in FIGS. 1 to 3, the noise current absorber of the first embodiment includes a thin strip-shaped band portion 10 having a ratchet 11 (see FIG. 2) formed on the back surface, and one end in the longitudinal direction of the band portion 10. The base portion 1 formed of the fixing portion 20 formed on the core portion, the core holding portion 30 that holds the annular magnetic core that is fitted on the cable, and the core holding portion 30 are slid along the longitudinal direction of the band portion 10. And a movable portion 3 including a locking portion 40 for movably mounting. The base portion 1 and the movable portion 3 are each integrally formed of an elastic material.

In addition, the band part 10 and the latching | locking part 40 are equivalent to the connection part in this invention.
1A and 1B are perspective views showing the configuration of the noise current absorber, in which FIG. 1A shows a state in which the movable part 3 is removed from the base 1, and FIG. 1B shows a state in which the movable part 3 is attached to the base 1. . 2 is a perspective view of the base 1 as seen from the back side, and FIG. 3 is a front view of the movable portion 3 and FIG. 3B is a partial sectional view thereof.

  Among these, the fixing part 20 which comprises the base 1 is for fixing the base 1 itself to the rectangular attachment hole drilled in attachment objects, such as the housing | casing of a personal computer, the wall of an office, When the press-fitted portion 21 is press-fitted into the mounting hole and protrudes from the base of the press-fitted portion 21 to both sides in the width (short side) direction of the band portion 10 and the press-fitted portion 21 is press-fitted into the mounting hole, It comprises a flat plate spring portion 22 that is pressed against the surface.

  In addition, the core holding part 30 constituting the movable part 3 accommodates each of the divided pieces of the annular magnetic core 36 divided into two by the dividing surface including the shaft, and is connected to each other via a hinge 35. A fixing mechanism for fixing the case portions 31 and 32 so that the case portions 31 and 32 and the divided pieces housed in the case portions 31 and 32 are combined in an original annular shape (a protrusion 33 and a hook 34 that engage with each other). ).

  The core holding part 30 configured in this manner releases the engagement between the protrusion 33 and the hook 34, exposes the split pieces held by the case parts 31 and 32, and the cable formed on the split pieces. The cable is disposed in the recess for forming the insertion hole, and the case portions 31 and 32 are closed in this state, and the hook 34 is engaged with the protrusion 33, whereby the magnetic core 36 fitted to the cable is fitted. It is attached to the cable in the stored state.

  Next, a band insertion hole 41 through which the band portion 10 is inserted is formed in the locking portion 40, and the tip portion of the band insertion hole 41 engages with the ratchet 11 of the band portion 10. A joint piece 42 (see FIG. 3) is projected, and an operation piece 43 for displacing the engagement piece 42 is extended from the engagement piece 42 toward the outside of the band insertion hole 41. .

  In the state where the operation piece 43 is not operated, the locking portion 40 configured in this manner is engaged with the tip portion of the engagement piece 42 and the ratchet 11 of the band portion 10 inserted through the band insertion hole 41. Thus, the movable portion 3 is fixed to the base portion 1. In other words, the fixed portion 20 and the core holding portion 30 are connected with a certain interval via the band portion 10 and the locking portion 40.

  On the other hand, when the operation piece 43 is operated to displace the engagement piece 42, the engagement between the distal end portion of the engagement piece 42 and the ratchet 11 is released. For this reason, the distance between the fixing portion 20 and the core holding portion 30 can be appropriately adjusted by changing the insertion amount of the band portion 10 into the band insertion hole 41 while operating the operation piece 43.

  The noise current absorber of this embodiment configured as described above has an attachment hole (not shown) formed in the vicinity of a power supply socket S provided in a housing K of a personal computer or the like, for example, as shown in FIG. To use). That is, by press-fitting the press-fitting portion 21 of the fixed portion 20 into the mounting hole of the housing K, the base 1 is attached to the housing K, and the cable C having the plug P paired with the socket S is attached to the cable C. By attaching the core holding part 30, the magnetic core 36 is externally fitted to the cable, and the base part attached to the housing K is inserted into the band insertion hole 41 of the locking part 40 provided integrally with the core holding part 30. The base portion 1 and the movable portion 3 are integrated by inserting the one band portion 10.

  Then, by operating the operation piece 43 and sliding the movable part 3 on the band part 10, the distance between the fixed part 20 and the core holding part 30, that is, the attachment position of the magnetic core 36 is absorbed by the noise current. Adjust to the most effective interval. Here, the core holding part 30 (magnetic core 36) is attached in the vicinity of the boundary with the boot B formed at the base part of the plug P.

However, the hole diameter of the cable insertion hole formed by the core holding part 30 and the magnetic core 36 is larger than the outer diameter of the cable C and smaller than the outer diameter of the boot B.
As described above, in the noise current absorber of the present embodiment, the fixing unit 20 that fixes the base 1 to the housing K, and the core holding unit 30 that holds the magnetic core 36 that is fitted around the cable C. This interval can be arbitrarily set within the range of the length of the band portion 10 by operating the operation piece 43.

Therefore, according to the noise current absorber of the present embodiment, adjustment of the attachment position of the magnetic core 36 can be easily performed without attaching / detaching the core holding part 30 to / from the cable C.
Moreover, in this embodiment, since the movable part 3 provided with the core holding | maintenance part 30 is being fixed to the housing | casing K via the base 1, as long as the connection of the plug P and the socket S is maintained, core holding | maintenance is carried out. The attachment position of the magnetic core 36 held by the portion 30 does not move. Therefore, noise current can be favorably absorbed by the magnetic core 36 that is initially held at the adjusted mounting position.

  Furthermore, according to the present embodiment, even if a force for detaching the plug P from the socket S is applied to the cable C, the boot B comes into contact with the core holding portion 30 and prevents the plug P from moving. It is possible to prevent the plug P from falling off the socket S in advance.

  Furthermore, in the present embodiment, the fixing portion 20 can fix the base portion 1 simply by drilling a rectangular mounting hole in the housing K, and elastically deforms the press-fit portion 21 when not in use. Thus, it can be removed from the mounting hole.

For this reason, it can be used in various parts with little modification of the structure and appearance of the attachment object to which the base 1 is attached, and the modification cost related to the use of the noise current absorber and the aesthetics of the device Can be minimized.
[Second Embodiment]
Next, a second embodiment will be described.

  The noise current absorber of the present embodiment is different from that of the first embodiment only in the configuration of the fixing portion 20, and therefore, the same components are denoted by the same reference numerals and description thereof is omitted. The description will focus on the different parts.

  That is, in this embodiment, the fixing | fixed part 20 is comprised separately from the fitting collar part 23 formed in the end of the band part 10, and the band part 10, as shown in FIG. And a sticking plate 24 provided with a fitting portion 24b that is detachably fitted to the fitting flange 23. The flat plate portion 24a is attached to the surface of the housing or the like. . The flat plate portion 24a is formed with an opening window 24c for exposing the socket S so that the plug P can be attached.

  In the noise current absorber of the present embodiment configured as above, first, the sticking plate 24 is placed in a state where the socket S provided on the attachment object is positioned so as to be exposed at the position of the opening window 24c. Fix to the mounting object with adhesive. And the band part 10 is integrated and used by inserting the fitting collar part 23 in the fitting part 24b of the sticking board 24 fixed to this attachment target object.

  In the noise current absorber of the present embodiment configured as described above, even when the attachment hole cannot be drilled in the attachment object, the noise current absorber can be attached to the attachment target part. Actions and effects similar to those of the first embodiment can be obtained.

  In addition, as a shape of the flat plate part 24a which comprises the sticking board 24, as shown to FIG. 6 (A), the opening window 24c may be abbreviate | omitted. Further, as shown in FIG. 6B, the sticking plate 25 may be configured integrally with the band portion 10.

Moreover, the fixing method of the sticking board 24 with respect to an attachment target object may be not only a double-sided tape and an adhesive agent but a screw stop.
[Third Embodiment]
Next, a third embodiment will be described.

  The noise current absorber of the present embodiment is different from that of the first embodiment only in the configuration of the fixing portion 20, and therefore, the same components are denoted by the same reference numerals and description thereof is omitted. The description will focus on the different parts.

  That is, in this embodiment, as shown in FIG. 7A, the fixing portion 20 is composed of a thin plate-like collar portion 27 formed at one end of the band portion 10, and the collar portion 27 has a screw hole 27a. Is formed.

  As shown in FIG. 7B, for example, the noise current absorber of the present embodiment configured as described above has a screw for fixing the outlet cover V to the wall surface in a screw hole 27a formed in the flange portion 27. By being inserted, it can be used by being fixed to the surface of the outlet cover V.

  Further, as shown in FIG. 7B, an insertion hole H through which the band portion 10 is inserted is formed in the outlet cover V, and is fixed so that the flange portion 27 is disposed between the outlet cover V and the wall surface. May be.

Note that the flange portion 27 may be fixed to a portion other than the outlet cover V using the screw hole 27a. Further, the screw hole 27a may be omitted, and the flange portion 27 may be fixed with a double-sided tape or an adhesive.
[Fourth Embodiment]
Next, a fourth embodiment will be described.

  The noise current absorber of the present embodiment is different from that of the first embodiment only in the configuration of the fixing portion 20, and therefore, the same components are denoted by the same reference numerals and description thereof is omitted. The description will focus on the different parts.

  That is, in this embodiment, the fixing | fixed part 20 has the latching | locking part 28 which bends one end of the band part 10 in the L shape at the back side, and the outlet cover V or an outlet, as shown in FIG. It consists of a pair of protrusions 29 formed in a shape projecting on the wall surface of the housing and holding both edges of the locking portion 28 (here, in a L-shaped cross section). A check piece is formed at the tip of the locking portion 28.

  The noise current absorber of the present embodiment configured as described above is fixed to the outlet cover V or the casing by sliding the engaging portion 28 between the pair of protrusions 29. As described above, by using the pair of protrusions 29 as a structure for fitting the locking portion 28, not only is the attachment / detachment to the outlet cover V or the housing easy, but also when the locking portion 28 is removed. The amount of protrusion from the outlet cover V and the housing can be minimized.

In addition, you may form the protrusion 29 on the sticking board 24 demonstrated in 2nd Embodiment instead of the fitting part 24b .

[ Other Embodiments]
As mentioned above, although several embodiment of this invention was described, this invention is not limited to the said embodiment, In the range which does not deviate from the summary of this invention, it is possible to implement in various aspects. is there.

For example, in the above-described embodiment, the ratchet 11 is formed on the back surface of the band unit 10, but may be formed on both end surfaces in the width direction of the band unit 10 as shown in FIG. 9 , for example. In this case, the locking portion 40 has a so-called seesaw type in which a claw 46 that swings around the fulcrum 44 by elastic deformation of the fulcrum 44 and engages with the ratchet 11 is formed at the tip. What provided the lever 45 so that it may pinch | interpose from the width direction both sides of the band part 10 can be used.

In the locking portion 40 configured as described above, the side opposite to the claw forming end of the lever 45 is used as the operation end, and the operation portion is pressed with a finger in a direction approaching each other, while the locking portion 40 and the band portion 10 are pressed. , The pressure on the lever 45 is released at an appropriate position, and the claw 46 may be engaged with the ratchet 11. In addition, in FIG. 9 , illustration of the core holding | maintenance part 30 is abbreviate | omitted.

Further, as shown in FIG. 10 , instead of providing a mechanism for engaging the ratchet 11 with the locking portion 40, a protrusion 47 whose tip is swelled in a spherical shape is provided, and the band portion 10 is provided instead of the ratchet 11. The fitting hole 12 into which the protrusion 47 is fitted may be formed. In this case, the locking portion 40 (and thus the core holding portion 30) can be fixed at an arbitrary position of the band portion 10 in a state where the band portion 10 is once folded. Further, in this case, since the movable part 3 including the core holding part 30 and the locking part 40 is integrated with the band part 10, the number of parts can be reduced, and the labor required for managing the parts can also be reduced.

It is a perspective view showing the structure of the noise current absorber of 1st Embodiment. It is a perspective view showing the back surface of a band part. It is the front view of a movable part, and its partial sectional view. It is explanatory drawing showing the use condition of a noise current absorber. It is a perspective view showing the structure of the noise current absorber of 2nd Embodiment. It is a perspective view showing the structure of the modification in 2nd Embodiment. It is a perspective view showing the structure of the noise current absorber of 3rd Embodiment, and the usage method. It is a perspective view showing the structure of the noise current absorber of 4th Embodiment, and the usage method. It is explanatory drawing showing the structure of other embodiment. It is explanatory drawing showing the structure of other embodiment .

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Base part, 3 ... Movable part, 10 ... Band part, 11 ... Ratchet, 12 ... Fitting hole, 20 ... Fixed part, 21 ... Press-fit part, 22 ... Leaf spring part, 23 ... Fitting collar part, 24 ... Paste Chakuban, 24a ... flat plate portion, 24b ... engaging portion, 24c ... opening window, 25 ... bonded Chakuban, 2 7 ... flange portion, 27a ... screw hole, 28 ... locking portion, 29 ... projection, 30 ... core Holding part, 31, 32 ... Case part, 33 ... Projection, 34 ... Hook, 35 ... Hinge, 36 ... Core holding part, 36 ... Magnetic body core, 40 ... Locking part, 41 ... Band insertion hole, 42 ... Engagement 43, operation piece, 44 ... fulcrum, 45 ... lever, 46 ... claw, 47 ... projection, B ... boot, C ... cable, H ... insertion hole, K ... housing, P ... plug, S ... socket, V … Outlet cover.

Claims (7)

A core holding part that holds an annular magnetic core that is externally fitted to the cable and is slidable with respect to the cable;
A fixing part fixed in the vicinity of a socket or an outlet for connecting a plug provided on the cable;
The fixed part is formed integrally with the elongated band part provided at one end and the core holding part, and is locked at any position on the band part or a plurality of preset positions. The core holding portion is in contact with a peripheral portion of the plug formed in a diameter larger than that of the cable when a force in a direction of pulling out the plug from the socket or the outlet is applied to the cable. A connecting portion that limits the movement of the cable and connects the core holding portion and the fixing portion so that the plug does not fall off from the socket or the outlet .
Noise current absorber, wherein the obtaining Bei a. The magnetic core is composed of a plurality of divided pieces obtained by dividing the magnetic core in the axial direction.
The core holding part is
A case portion for storing the divided pieces, and
A fixing mechanism configured to be detachable, and fixing the case portion so that the divided pieces housed in the case portion are annularly combined;
The noise current absorber according to claim 1, further comprising: The said fixing | fixed part is press-fitted in the attachment hole drilled in the wall surface of the attachment target object which has the said socket or an electrical outlet, and has a shape with which the said fixing | fixed part is mounted | worn by elastic deformation, Item 3. The noise current absorber according to Item 2. The noise current absorber according to claim 1, wherein the fixing portion is made of a sticking plate that is stuck to a wall surface of an attachment object having the socket or the outlet . Before the KIHA Chakuban noise current absorber according to claim 4, characterized in that it has an opening for exposing the socket or outlet formed in the attachment object. The connecting portion is
A band part formed in a long shape;
A locking part that can be locked at any position on the band part or at any of a plurality of preset positions;
From now, one of the core holding portion and the fixed portion, the one of the band portions, according to claim 1 to claim 5 noise current according the other one is characterized in that it is fixed to the locking portion Absorber. The noise current absorber according to any one of claims 1 to 6 , wherein at least one of the core holding part and the fixed part and the connecting part are configured to be detachable.

Images