JP2560759Y2 - Noise current absorber - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a noise current absorber which is attached to an electric wire to absorb a noise current flowing through the electric wire. 2. Description of the Related Art Conventionally, as a method of absorbing a noise current flowing through an electric wire, a closed magnetic path is formed by attaching a magnetic material (eg, ferrite) around the electric wire, and the magnetic material flows through the electric wire. Techniques for absorbing noise current are known. Conventionally, when a noise current is absorbed by using such a magnetic material, a half-split ring-shaped magnetic material has been attached simply by wrapping around the electric wire using an adhesive tape or the like. A tape holder-like holding case as shown in FIG. 14 may be used to store an undivided annular magnetic body, and in this state, the magnetic body housed in the holding case may be arranged around the electric wire. there were. [0004] However, in the above-described conventional technology, when an adhesive tape is used,
It was not easy to attach the magnetic material firmly so as not to come off the wire. In addition, when a conductive magnetic material is used, there is a possibility that a short circuit or the like may occur due to contact with another conductive member. On the other hand, when the holding case as described above is used, in order to dispose the annular magnetic body housed in the holding case around the electric wire, one end of the electric wire before wiring is housed in the magnetic case. It was necessary to pass through the insertion hole of the holding case. Therefore, for example, as a countermeasure against noise current discovered after wiring, when attaching the magnetic body housed in such a holding case to an electric wire, or when changing the attachment position once attached to the electric wire, It is necessary to remove the wiring,
It took a lot of time. [0006] Therefore, it is easy to attach the magnetic body to the electric wire and change the attachment position.
The present invention was devised for the purpose of providing a noise current absorber in which a magnetic body attached to an electric wire is fixed in a holding case and a closed magnetic path is formed by attaching the magnetic material to the electric wire. SUMMARY OF THE INVENTION The present invention, which has been made to achieve the above-mentioned object, has a pair of magnetic members each having a shape obtained by dividing an annular body into an open ring, and the pair of magnetic members can be accommodated. And a holding case having an opening at an inner peripheral surface between the two half surfaces and the two half surfaces for each half. By closing the holding case accommodating the magnetic material, it is attached to the outer periphery of the electric wire in an annular shape, and in a noise current absorbing device for absorbing a noise current flowing through the electric wire, the other magnetic material of each of the halved magnetic materials is used. A concave portion is provided on a side edge of a surface facing the body, and the holding case does not protrude outside from an opening surface of the holding case, and the insertion direction of the electric wire from each of the inner wall side surfaces of the holding case, which is halved. Projecting toward the magnetic body. A pawl for engaging the recess made, and the thin portion provided by forming a recess in the inner wall side facing the pawl, characterized in that provided. The noise current absorbing device of the present invention is used, for example, as follows. First, a half-split holding case is opened, and a pair of magnetic bodies is housed inside from each opening. At this time, the concave portions formed in the respective magnetic bodies are engaged with the claws formed in the holding case, and the respective magnetic bodies are fixed in the holding case. Then, with the holding case for accommodating the pair of magnetic bodies being opened, the electric wire is extended along the inner peripheral surface of the magnetic body from the open side, and the holding case is closed to attach the noise current absorber to the electric wire. Then, the pair of magnetic bodies are combined to form an annular shape in a state where the electric wire is inserted, and a closed magnetic path is formed around the electric wire by the magnetic body. Further, when changing the position where the noise current absorber is attached on one electric wire, an external force is applied to the noise current absorber attached to the electric wire as described above, and the noise electric current absorber is moved according to the electric wire. At this time, if the inner peripheral surface of the magnetic body and the outer peripheral surface of the electric wire are not easily moved due to close contact, the holding case is opened, and the annular inner peripheral hole made of a pair of magnetic materials and the outer peripheral surface of the electric wire are connected. Make a gap between them. Thereby, the noise current absorber can be moved according to the electric wire, and the noise current absorber is moved to the changed position. Further, in the noise current absorbing device of the present invention , the insertion of the magnetic body into the holding case is performed without difficulty. That is, since the distance from the claw protruding on the inner wall side surface to the claw protruding on the opposing inner wall side surface or the opposing inner wall side surface is smaller than the width of the magnetic body inserted into the holding case,
The magnetic material inserted into the holding case is inserted while deforming the holding case so as to abut on the claw and push open the opening of the holding case, but the thin portion of the holding case is relatively large. Since the elastic body can be elastically deformed, the magnetic body is easily inserted into the holding case. In particular, when the claw is provided only on one side of the opposing inner wall side surface, in the magnetic body to be inserted into the holding case, when one side end of the outer peripheral surface is in contact with the claw, the other Is fitted in a concave portion forming a thin portion of the holding case. For this reason, the magnetic body is positioned in the direction deviated by the depth of the concave portion forming the thin portion, and the contact between the outer peripheral surface of the magnetic body and the claw is shallower. From this state, the magnetic body is inserted into the holding case along the concave portion forming the thin part, so that the holding case is not required to deform so much, and the magnetic body can be easily formed without applying excessive force to the magnetic body. rides over the claw Ru is accommodated in the holding case. An embodiment of the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to the embodiment described in detail below, but includes all ranges that can be conceived by those skilled in the art based on obvious matters. A noise current absorber 1 according to an embodiment of the present invention.
As shown in FIG. 1, a pair of ferrites 2a and 2b each having a shape obtained by halving an annular body into an open annular shape to form a closed magnetic path around the outer periphery of an electric wire, and a substantially hollow annular body to house them. Is formed integrally with a synthetic resin in a shape obtained by half-splitting the opening and closing ring so that each part comprises a holding case 3 having an appropriate elasticity. The pair of ferrites 2a and 2b have the same shape, and when combined in an annular shape, have a mutual inner peripheral surface 4a.
a, 4b, so that a through hole 5 for inserting an electric wire is formed. As shown in FIG. 2, each of the ferrites 2a and 2b has recesses 6a and 6b at the edge facing the other ferrite. As shown in FIGS. 3 to 6, the holding case 3 has two case portions 8 joined by a hinge 7;
9 is comprised. Case parts 8 and 9 are made of ferrite 2
a, 2b are formed so that they can be stored without play. That is, the ferrite 2a,
2b from the outer peripheral surface 5a (5b) to the inner peripheral surface 4a.
Holding claw 10 for pressing in the direction of (4b),
11 are provided. Further, the inner peripheral wall surface of the case 8, 9 is cut in a U-shape, the Rukoto was slightly bite into the wall of the portion surrounded by the U-shaped inside, pressing nails 10,1
1 is formed so as to be elastically deformable. In each of the case portions 8 and 9, hook-like engaging and disengaging mechanisms 14 and 15, which are configured to be mutually disengageable, are provided at respective ends facing the hinge 7. Furthermore, the front and rear side walls of the case portions 8 and 9 include
It is possible to provide recesses 26a, 26b, 27a, 27b on the wall side.
A thin portion is formed, and the semi-circular cutout portions 16a and 16 through which the electric wires are respectively inserted are formed in the thin portion.
b, 17a and 17b are provided. Then, the ferrites 2a and 6b engage with the recesses 6a and 6b of the ferrites 2a and 2b.
The pressing claws 12 and 13 for pressing a and 2b from the side surfaces and fixing them in the case portions 8 and 9 are arranged closer to the edges of the cutout portions 16a and 17a so as not to abut the inserted wires. Inside the parts 8 and 9, they protrude from the inner surfaces of the side walls of the case parts 8 and 9 in the direction of insertion of the electric wires. A procedure for attaching the noise current absorber 1 to an electric wire as described above will be described. First, as shown in FIG.
The ferrites 2a and 2b are housed inside the holding case 3. That is, the ferrites 2a and 2b are fitted into the case portions 8 and 9, respectively. At the time of insertion,
The ferrites 2a and 2b are on the side facing the pressing claws 12 and 13.
Along the recesses 26a, 27a formed in the side walls of
It is. That is, the ferrites 2a, 3a are
7a so that it can be inserted into the holding case 3.
One side of the outer peripheral surface of the ferrites 2a and 2b to be tried
When the end is in contact with the pressing claws 12, 13, the other side
The ends are fitted into the recesses 26a, 27a.
Therefore, the ferrites 2a and 2b have the side ends with the concave portions 26a and 2a.
7a deviates from the center of holding case 3 by the amount
As a result, the pressing claws 12, 13 and
The contact of the ferrites 2a, 2b with the outer peripheral surfaces becomes shallower. So
From this state, the ferrites 2a and 2b are
a into the holding case 3 along the
Because the lights 12, 13 get over the pressing claws 12, 13.
Deformation of the holding case 3 is small,
Even if you do not apply excessive force to the lights 2a and 2b,
The gates 2a and 2b are easily inserted into the holding case 3. Only
Also, the side wall on which the pressing claws 12, 13 are formed and the pressing
A concave portion 26a is provided on each of the side walls facing the claws 12 and 13.
By forming 26b, 27a, 27b, the thin portion
The holding case 3 is formed by this thin portion.
Ferrite 12, 13
Can be stored. Thus, the holding case 3
The ferrites 2a, 2b fitted in the recesses 6a,
6b are engaged with the pressing claws 12 and 13, respectively, and the case portion 8,
9 is fixed. Moreover, the blowjob in the case parts 8 and 9
The lights 2a and 2b are formed on the inner peripheral wall surfaces of the case portions 8 and 9.
Pressed by the holding claws 10 and 11, the concave portions 6a and 6b
Are engaged with the pressing claws 12 and 13 in close contact with each other.
Therefore, even if the case parts 8 and 9 are open,
The ferrites 2a and 2b are not rattled.
No. Next, an electric wire is placed on the notches 16a, 16b or the notches 17a, 17b, and the case portions 8, 9 are placed.
Is closed, and the engagement / disengagement mechanisms 14 and 15 are engaged. Thereby, as shown in FIG. 7, the noise current absorber 1 according to the present embodiment is attached to the outer periphery of the electric wire. In this state, the ends 18, 19 on the side of the engagement / disengagement mechanisms 14, 15 are inserted into a pedestal 20 as shown in FIGS. 8 to 11, and the pedestal 20 is attached to a wall or the like inside the electronic device. May be fixed. The pedestal 20 screws a screw into the screw hole 21 and fixes it to a wall surface or the like. End 1 inserted into pedestal 20
8 and 19 are easily dissociated from the pedestal 20 by pressing the J-shaped levers 22a and 22b inward.
FIGS. 12 and 13 show the noise current absorber 1 according to the present embodiment inserted into the pedestal 20. When the position of the noise current absorber 1 to be attached to the electric wire is changed, the engaging / disengaging mechanisms 14 and 15 (of the noise current absorber 1 dissociated from the pedestal 20) are released and the holding case 3 is slightly moved. It can be moved along the wires while keeping it open. As described above, the noise current of the present embodiment
According to the absorber 1, a thin wall portion is formed on the side wall of the holding case 3.
Forming recesses 26a, 26b, 27a, 27b are provided.
And insert the ferrites 2a and 2b into the holding case 3.
At the time of the pressing, provided on the side wall facing the pressing claws 12, 13.
By inserting along the recesses 26a, 27a, pressing
The contact between the claws 12, 13 and the ferrites 2a, 2b is shallow.
Since the deformation of the holding case 3 is small,
Easy without applying excessive force to ferrites 2a and 2b
Can be inserted into the holding case 3. When the noise current absorber 1 is attached to an electric wire, the ferrite 2a,
2b, the recesses 6a and 6b have the pressing claws 12,
13, the ferrites 2a, 2b in the holding case 3 are fixed in the case portions 8, 9, respectively.
Is prevented from rotating, swinging or falling off. Moreover, since the pressing claws 12, 13 are provided inside the edges of the notches 16a, 17a, the pressing claws 12, 13 contact the electric wires even when the noise current absorber 1 is attached to the electric wires. Therefore, the pressing claws 12 and 13 do not damage the electric wire when the noise current absorber 1 is attached to the electric wire or when the mounting position is changed. Further, the pressing claws 12 and 13 project from the inner surfaces of the side walls of the case portions 8 and 9 in the wire insertion direction inside the edges of the notches 16a and 17a. Accordingly, when the electric wires are inserted between the case portions 8 and 9 containing the ferrites 2a and 2b and the holding members 3 are closed by applying a force in the opening direction to open the engaging and disengaging mechanisms 14 and 15, The portions 8 and 9 are deformed in the direction in which the distance between each of the engagement / disengagement mechanisms 14 and 15 and the hinge 7 is increased, and the pressing claws 12 and 1
The ferrites 2a, 2b are firmly held by the pressing claws 12, 13, and there is no danger of the ferrites 2a, 2b jumping out of the case portions 8, 9, since the ferrites 2a, 2b are deformed in the direction of biting into the notches 16a, 17a. At the same time, since the ferrites 2a and 2b are pressed from the outer peripheral surfaces 5a and 5b toward the inner peripheral surfaces 4a and 4b by the holding claws 10 and 11, respectively, the electric wires inserted into the noise current absorber 1 are provided. , A substantially complete closed magnetic path is formed by the ferrites 2a and 2b, and the noise current flowing through the electric wires is absorbed by the ferrites 2a and 2b. Further, in a state where the holding case 3 is opened,
Ferrites 2a, 2 pressed by holding claws 10, 11
b, the concave portions 6a and 6b
Hold case 3 without rattling because it is engaged with
Is held inside. The noise current absorber 1 according to the present embodiment
As described above, the ferrites 2a and 2b are attached to the electric wire while the holding case 3 which can be opened and closed is opened.
After fitting into the case portions 8 and 9, the electric wires can be placed in the cutout portions and the engaging and disengaging mechanisms 14 and 15 can be engaged by a simple method. Changing the position at which the noise current absorber 1 is attached to the electric wire can also be accomplished by disengaging the disengagement mechanisms 14 and 15 and moving the holding case 3 slightly open along the electric wire. This can be done by a simple method. In the present invention, the recess formed in the magnetic body may be any one of a flat portion , an inner peripheral side, and an outer peripheral side.
If the side edges of the facing surfaces of the relative magnetic, it may be anywhere form. The number of concave portions provided in one magnetic body is not limited to one, but may be plural. The greater the number of recesses provided in one magnetic body, the greater the effect of preventing the rotation, swinging, or falling off of the magnetic body inside the holding case. As described above in detail with reference to one embodiment, in the noise current absorbing device of the present invention, the concave portion provided in the magnetic body is engaged with the claw formed in the holding case. By doing so, the magnetic body is fixed in the holding case, and its rotation, swing or dropping is prevented, and a closed magnetic path is formed when the magnetic body is attached to the electric wire. By forming the closed magnetic circuit in this way, the noise current flowing through the electric wire is absorbed. In addition, since the claws are provided so as not to protrude outside from the respective half-opened surfaces of the holding case, the formation of a closed magnetic path around the electric wire by the magnetic material is not hindered by the claws, and the noise is reduced. A good current absorption function can be maintained, and the electric wire is not damaged by the claws when the noise current absorber is attached to the electric wire or when the attachment position is changed. Furthermore, since the claws are protruded from the respective inner wall side surfaces of the holding case in half in the insertion direction of the electric wires, the claws are housed in the ring-opening direction with respect to the closed holding case containing the magnetic material. When the holding case is opened by applying force, each half of the holding case is deformed in a direction in which the claws bite into the recesses of the magnetic body, and therefore, the magnetic body is firmly held by the claws and pops out of the holding case. There is no fear. In the noise current absorbing device according to the present invention , each of the pair of magnetic members is formed in a shape obtained by dividing an annular member into an open ring, and the holding case is formed to have a shape capable of accommodating each magnetic member. Since the hollow annular body is divided in half so that it can be opened and closed, the noise current absorber can be easily attached to the wire by a simple operation of opening the holding case containing the magnetic material and sandwiching the wire, The mounting position can be changed by a simple operation of applying an external force to the noise current absorber attached to the electric wire in such a manner. Furthermore, according to the noise current absorber of the present invention ,
The holding case has a relatively thin elastically deformable thin part, so that when the magnetic material is inserted into the holding case over the claw, the holding case is not forced to deform excessively, and The body can be stored. In particular, when the claw is provided only on one side of the opposing inner wall side surface, the magnetic material is inserted along the concave portion forming the thin portion of the holding case, so that the magnetic material is held when starting insertion of the magnetic material. be small deformation of the case is strong, Ru can be the insertion of magnetic material into the holding case easier ones.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective explanatory view of a noise current absorber 1 according to an embodiment of the present invention. FIG. 2 is a perspective view of a ferrite 2a constituting the noise current absorber 1 of the present embodiment. FIG. 3 is a partially cutaway perspective view of a holding case 3 constituting the noise current absorber 1 of the present embodiment. 4 is a plan view of the holding case 3. FIG. FIG. 5 is a sectional view of the holding case 3 taken along line AA of FIG. FIG. 6 is a sectional view showing a state where the holding case 3 shown in FIG. 5 is closed. FIG. 7 shows a noise current absorbing device 1 according to the present embodiment, which is externally fitted to an electric wire.
It is a perspective view of. FIG. 8 is a partially broken perspective view of the pedestal 20. 9 is a plan view of the pedestal 20. FIG. FIG. 10 is a sectional view of the pedestal 20 shown in FIG. 9 taken along line BB. 11 is a rear view of the pedestal 20. FIG. FIG. 12 is a perspective view of the noise current absorber 1 of the present embodiment inserted into the pedestal 20. 13 shows a pedestal 20 and a noise current absorber 1 shown in FIG.
FIG. FIG. 14 is an external perspective view of a conventional holding case for storing a magnetic body. [Description of Signs] 1 ... Noise current absorber, 2a, 2b ... Ferrite,
3, 4 ... holding case, 5 ... through-hole, 6a, 6b ... recess, 7 ... hinge, 8, 9 ... case part, 10, 11 ... holding claw, 12, 13 ... pressing claw, 14 ... engaging and disengaging mechanism, 16a , 16b: Notch, 20: Base

Claims (1)

(57) [Rules for requesting registration of utility model] A pair of magnetic bodies in the shape of an annular body split in half into an open ring,
The hollow annular body capable of storing the pair of magnetic bodies is divided in half so as to be openable and closable, and each of the divided halves has two halved surfaces and an inner peripheral surface between the two halved surfaces. By closing the holding case accommodating the magnetic material, the holding case containing the magnetic material is annularly attached to the outer periphery of the electric wire, and the noise current absorbing device for absorbing a noise current flowing through the electric wire, A concave portion is provided at a side edge of a surface of each magnetic body facing the other magnetic body, and the holding case does not protrude outside from an opening surface of the holding case,
A claw projecting from each of the halved inner wall side surfaces of the holding case toward the insertion direction of the electric wire and engaging with the concave portion formed on the magnetic body; a concave portion on the inner wall side surface facing the claw; noise current absorber, characterized in that a, a thin portion provided by forming.