JP2551803Y2 - Noise current absorber - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a noise current absorbing device that absorbs a noise current generated inside an electronic device and a noise current generated outside and flowing into the electronic device through an electric wire. About the tool. 2. Description of the Related Art As a technique for absorbing a noise current flowing through an electric wire, a ring-shaped ferrite, which is a magnetic material, is externally fitted around the electric wire, and the ferrite absorbs a noise current flowing through the electric wire. Have been. To fix such ferrite to an electric wire, insert the ferrite from one end of the electric wire, insert a shrinkable tube, move the ferrite to a predetermined position, cover the shrinkable tube, and shrink the shrinkable tube by heating. It was being done. The ferrite has a ring shape, and it has been proposed to divide the ferrite into two or more divided pieces (for example, JP-A-60-43806). Was attached to the split ring-shaped ferrite using adhesive tape or the like to simply wrap around the wire. [0004] However, the above-mentioned conventional technique has the following problems, and it has been desired to improve it. (1) The frequency band of noise that can be absorbed by ferrite is determined, and when the frequency of noise flowing through an electric wire is changed, the noise may not be able to be absorbed. Although it is necessary to replace the type, the conventional technique is intended to fix the ferrite while penetrating the wire, and does not consider replacing the ferrite at all. For this reason, it is very difficult to replace ferrites, such as tearing the shrinked tube or peeling off the adhesive tape.Therefore, the noise absorption band is suitable for various applications such as high frequency and low frequency. There was a problem that could not be changed. (2) Further, since the conventional ring-shaped ferrite which is not divided forms a closed loop, the ferrite must be inserted from the end of the conductor in order to allow the electric wire to pass through the ferrite. However, there is a problem that the work of mounting the ferrite is difficult, and the conventional divided ferrite is easier to penetrate the electric wire than the undivided ferrite, but the ferrite is divided. There was a problem that it was difficult to fix the ferrite to the electric wire while preventing the pieces from being separated. SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it is possible to easily change a noise absorption band and easily attach a magnetic material such as ferrite to an electric wire. The purpose is to provide. [0007] In order to achieve the above object, the present invention has the following structure as means for solving the above-mentioned problems. That is, the present invention provides a pair of magnetic bodies each having a shape obtained by half-opening an annular body and a holding case formed by half-dividing a hollow annular body capable of storing the pair of magnetic bodies.
And each of the holding cases halved through hinges
Is openably connected, for each, which is half of the holding case has an opening to the inner peripheral surface between the two half surface and the two half surfaces, said holding case containing the magnetic substance A noise current absorber that can be attached to an electric wire as a ring by closing it and absorbs noise current flowing through the electric wire
A is a ring, which face each other, of the respective magnetic body that is the halves
In order to detachably hold each of the magnetic bodies in the holding case, a resiliently deformable claw engaging with the recess is provided on each of the half of the holding case. Each of the claws projecting from the inner wall surface of the holding case toward the insertion direction of the electric wire and engaging with the concave portion is a half of the holding case.
Extending from each inner wall surface to the tip of the claw
The gist of the present invention is a noise current absorber characterized by having a negative surface . [0008] Here, the shape of the magnetic material element is in the form surrounding the outer periphery of the wire, for example, a ring-shaped, those of the rectangular frame-shaped, those cylindrical with a hole for the electric wire inserted through the center And so on. In this invention the noise current absorber configured as the following, disengaging the recess and the holding case claw magnetic body
Easily remove the magnetic material from the holding case
Can also insert another magnetic material into the holding case
To engage the recesses of the magnetic body with the claws of the holding case.
Thus, the magnetic body can be easily attached. Therefore, when it is desired to change the noise absorption band,
Easily attaches the magnetic material of the noise current absorber to the desired magnetic material.
It is possible to switch. Also accommodates a pair of magnetic materials
With the holding case opened, open the magnetic material from the open side.
After putting the wires along the inner circumference, close the holding case.
The noise current absorber can be easily attached to the wire.
it can. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, preferred embodiments of the present invention will be described in detail. FIG. 1 is an exploded perspective view of a noise current absorber according to one embodiment of the present invention, FIG. 2 is a perspective view of the noise current absorber attached to an electric wire (single line), and FIG. It is a perspective view of. As shown in these drawings, the noise current absorbing device 101 includes a holding case 105 which accommodates a ferrite 103 divided into two and can be opened and closed . The ferrite 103 is composed of divided pieces 103a and 103b each having a shape obtained by dividing a ring into two in a semicircular shape.
07b is formed ( FIG. 3 ). Here, as the magnetic material, ferrite such as manganese / zinc or nickel / zinc is preferable. For example, a metal core such as silicon steel or a dust core such as molybdenum is used. You can also. The holding case 105 includes a case portion 11 joined by a hinge 109.
1 and 113. Both case parts 111, 113
Is configured such that the divided pieces 103a and 103b can be stored without play. That is, on the inner surfaces of the peripheral wall portions of the case portions 111 and 113, pressing claws 115 for pressing the outer peripheral surfaces of the divided pieces 103a and 103b inward project elastically and inwardly and integrally with the case portions. Provided in
On the inner surfaces of the rear side walls of the case portions 111 and 113, elastically deformable locking claws 119 and 121 for fitting into the concave portions 107a and 107b of the divided pieces 103a and 103b and locking the divided pieces 103a and 103b are provided. It is protruding. Locking claw 1
Reference numerals 19 and 121 denote each of the two case portions 111 and 113.
A taper extending from the wall surface to the tips of the claws 119 and 121
Surface. Further, a convex engaging portion 123 is provided at an end of the case portion 111 opposite to the hinge 109, and the convex engaging portion 123 is provided at an end of the case portion 113 opposite to the hinge 109. The key-shaped engaging portions 125 to be engaged with each other are provided. Each of the case portions 111 and 113 has two protruding pieces 111 at its end opposite to the hinge 109.
a, 111b (113a, 113b (FIG. 2)) are provided in parallel. The noise current absorber 101 having such a configuration is as follows.
Ferrite split pieces 103a, 1
In a state in which 03b is stored, the wire DS is passed between the case portions 111 and 113, and the hook portion 125 is engaged with the convex engagement portion 123 so that the case portion 113 is fitted to the case portion 111. Then, the divided pieces 103a, 103b
Abut each other to form a closed loop of the magnetic field, and the electric wire D
S ( FIG. 2 ). The noise current absorber 1
Reference numeral 01 denotes a protruding piece 111a, 111
b, 113a and 113b can be engaged and fixed. If it is desired to change the noise absorption band that can be absorbed by the noise current absorber 101, the holding case 105
The engagement between the convex engaging portion 123 and the key engaging portion 125 is released, the holding case 105 is opened, and the locking claw 1 that engages the divided pieces 103a and 103b of the ferrite 103 with each other.
What is necessary is just to release the lock of 19, 121, and replace it with ferrite of a different kind. [0016] Thus, it described above in detail getting the actual施例noise current absorber 101 can easily change the noise absorption band, moreover, can be attached one-touch, easily wire DS. Further, since the ferrite 103 is completely housed in the holding case 105, no accident such as a short circuit or electric touch occurs in the electronic device. [0017] have been described in detail the real施例of the present invention,
The present invention is not limited to these embodiments . For example, as shown in FIG.
As a rectangular parallelepiped box shape that can be opened and closed by engaging and disengaging the engaging portion 133, the ferrite split pieces 135 and 137 are configured to be detachably fitted and stored in the holding case 131. It goes without saying that the present invention can be implemented in various modes without departing from the gist of the present invention. As described in detail above, the noise current absorber of the present invention can easily change the noise absorption band because the magnetic body held in the holding case can be easily replaced. be able to. In particular, a claw that engages the recess of the magnetic body
The claw from each of the half inner walls of the holding case.
Because it has a tapered surface that extends to the tip of the
The replacement work is easy, and the nails break even after repeated
Never be . Also, the recess provided in the magnetic body and the holding case
By engaging the formed claw,
To fix the magnetic body, preventing its rotation, swinging or falling off
Is done. Magnetic pair closes when attached to electric wire
By forming a path, the noise current flowing through the electric wire is absorbed
can do. Further, each of the pair of magnetic bodies forms an annular body.
It has a half-opened shape, and the holding case is also magnetic.
Half of the hollow annular body can be opened and closed as a shape that can store the body
Open the holding case containing the magnetic material
The simple work of pinching the wire allows the noise absorber to be turned on.
Can be easily attached to the wire, and in addition,
To apply external force to the noise current absorber attached to the wire.
Change the mounting position by a simple operation of adding
It is possible to [0021]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a noise current absorber according to one embodiment of the present invention.
It is an exploded perspective view. FIG. 2 shows a noise current absorber attached to an electric wire (single wire).
It is a perspective view at the time. FIG. 3 is a fragment of ferrite in a noise current absorber .
It is a perspective view of. FIG. 4 is a perspective view of another embodiment. [EXPLANATION OF SYMBOLS] 1 01 ... electromagnetic noise absorber 1 03 ... ferrite 103a, 103b ... divided piece 105 ... holding case 115 ... pressing nails 19, 12 ... engaging claws 123 ... convex engaging portion 125 ... hook-like engagement Department

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,
Formed by halved the stowable hollow annular body the pair of magnetic substances
And a holding case, and each of the holding cases
Are openably connected via a Nji for each that is half of the holding case has an opening to the inner peripheral surface between the two half surface and the two half surface was accommodating the magnetic A noise current absorber that can be attached to an electric wire as an annular shape by closing the holding case and absorbs a noise current flowing through the electric wire , wherein a side end of the annular inner surface of each of the half-divided magnetic bodies facing each other. In order to detachably hold each of the magnetic bodies in the holding case, an elastically deformable claw engaging with the recess is formed from each of the half inner wall surfaces of the holding case. Each of the claws , which protrude in the direction of insertion of the electric wire and engage with the recess, is a half of the holding case.
A tapered surface extending from each inner wall surface to the tip of the claw
A noise current absorber comprising: