JPH0689815A - Noise absorber - Google Patents

Abstract

PURPOSE:To obtain a noise absorber capable of being mounted on a cable wherein the cable is prevented from moving when divided cases are closed in the state that the cable is inserted into the insertion recessed part of divided magnetic members, the cable is not pinched by the junction surfaces of the divided magnetic members, and the divided cases are easily closed and unified in a body without damaging the cable. CONSTITUTION:Protruding parts 13 are formed on the side surface of one of divided cases 4a and 4b which accommodate divided magnetic members 1a and 1b. In the state that a cable is put between the protruding parts 13 and inserted into an insertion recessed part 2a and an insertion hole 5a, the divided magnetic member 1b and the divided case 4a are closed, and the divided magnetic members and the divided cases are unified in a body by fastening them with fastening members 8, 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a noise absorber for absorbing high frequency unwanted radiation noise radiated from a cable.

[0002]

2. Description of the Related Art FIG.
11 is a front view showing an open state of the conventional noise absorber shown in FIG. In the figure, 1a and 1b are semi-cylindrical split magnetic bodies made of ferrite or the like, and have insertion recesses 2a and 2b through which a cable is inserted, and two are joined at a joint surface 3 to form a cylindrical magnetic body. Form. Reference numerals 4a and 4b denote split cases that house the split magnetic bodies 1a and 1b, respectively.
a and b have through holes 5a and 5b corresponding to a and b, which are openably and closably coupled by two hinges 6, and are fastened by fastening members 8 and 9 in a state where both are closed and joined at a joint portion 7. It is designed to be used. Reference numeral 10 is a pressing spring interposed between the divided magnetic bodies 1a and 1b and the divided cases 4a and 4b.

The above noise absorber is divided into the divided cases 4a,
4b is opened, the split magnetic bodies 1a and 1b are housed in the respective housings, and a cable (not shown) is inserted into one of the insertion recesses 2a or 2b and the insertion hole 5a or 5b. The other divided magnetic body 1b or 1a
And the split case 4b or 4a is closed, and the tightening member 8,
Tighten with 9 to integrate.

At this time, the divided magnetic bodies 1a and 1b are joined at the joint surface 3 in a state where the cable is inserted (penetrated or wound) into the insertion recesses 2a and 2b to form a cylindrical magnetic body. Further, the divided cases 4a and 4b are joined together at the joining portion 7 to form a cylindrical case, and the pressing spring 10 presses the joining surface 3 of the divided magnetic bodies 1a and 1b to form a closed magnetic path.

In this state, when high frequency unwanted radiation noise (50 M to 300 MHz) is radiated from the cable, it is absorbed and removed by the magnetic loss of the magnetic material.

[0006]

Since the conventional noise absorber is constructed as described above, when the split cases 4a and 4b are closed with the cable inserted, the cable bulges and the split magnetic body is formed. It is easy to be sandwiched between the joint surfaces 3 of 1a and 1b, and as a result, there are problems that the cable is damaged and the split cases 4a and 4b do not close.

The present invention has been made in order to solve the above-mentioned problems, and even if the cable is closed with the cable inserted, the cable is not pinched in the joint surface of the divided magnetic body, so that the cable is An object of the present invention is to obtain a noise absorber that can easily close and integrate the divided cases without damaging the.

[0008]

A noise absorber according to the present invention has a split magnetic body having an insertion recess and a joint surface for inserting a cable, an insertion hole and a joint surface corresponding to the insertion recess, and An openable and closable split case for accommodating the split magnetic bodies, and a projecting portion projecting to prevent movement of the inserted cable are provided on at least one side surface of the split case.

[0009]

In the noise absorber of the present invention, the divided magnetic bodies are accommodated in the respective divided cases with the divided cases opened, and the divided cases on the side having the protrusions and the insertion holes and the insertion holes of the divided magnetic bodies accommodated therein. With the cable inserted through the recess, the other split case is closed, and the split magnetic bodies are joined and integrated at the joining surface to form a magnetic body. At this time, the cable is prevented from moving by the projecting portion and is not sandwiched between the joint surfaces of the divided magnetic bodies when the divided case is closed.

[0010]

Embodiment 1 An embodiment of the present invention will be described below with reference to the drawings. Figure 1
Is a front view showing an opened state of the noise absorber of Example 1,
FIG. 2 is a perspective view showing the mounted state, and in the figure,
The same reference numerals as those in FIG. 4 indicate the same or corresponding portions. Reference numeral 11 is a cable.

The divided magnetic bodies 1a and 1b are constructed similarly to the conventional ones. The split cases 4a and 4b are also constructed in substantially the same manner as the conventional ones, but one split case 4a
The side surface 12a of the divided magnetic body 1a is higher than the joint surface 3 of the divided magnetic body 1a in such a manner that the protruding portion 13 extends both sides of the insertion hole 5a so as to prevent the cable 11 from moving in the lateral direction when inserted. It is protruding. Side 12 of the other split case 4b
A concave portion 14 corresponding to the protruding portion 13 is formed in b. Other configurations are the same as those in FIG.

The above-mentioned noise absorber has a split case 4a,
In the state where 4b is opened, the divided magnetic bodies 1a and 1b are housed respectively, and the cable 1 is provided between the protrusions 13 of the divided case 4a.
1 is inserted and inserted into the insertion recess 2a and the insertion hole 5a. In this state, the other split case 4b is inserted via the hinge 6.
Closed and tightened with tightening members 8 and 9, the split magnetic body 1
A and 1b are joined at the joining surface 3 to be integrated into a cylindrical magnetic body to form a closed magnetic circuit.

At this time, since the cable 11 is housed between the projecting portions 13, even if a bulge occurs, the cable 11 is prevented from moving in the lateral direction and does not stick out on the joint surface 3 of the divided magnetic body 1a. Therefore, even if the split case 4b is closed in this state, the split magnetic bodies 1a and 1b do not sandwich the cable 11. Thereby, the split cases 4a and 4b can be easily closed and integrated without damaging the cable 11, and the noise absorber can be attached to the cable 11.

Embodiment 2 FIG. 3 is a front view showing a split case of the noise absorber of Embodiment 2. As shown in FIG. In this embodiment, the divided cases 4a and 4b have the same structure as that of FIG. 4, and the U-shaped guide member 15 is provided on the side surface 12a of one of the divided cases 4a.
Is attached, and the tip portion thereof is the protrusion 13.
The noise absorber of this embodiment is also attached to the cable 11 in the same manner as in the first embodiment, and has the same effect.

In the above embodiments, the shapes and structures of the divided magnetic body and the divided case are not limited to those shown in the drawings, and can be changed.

[0016]

According to the noise absorber of the present invention, since the projecting portion is provided in the split case for accommodating the split magnetic body, the movement of the cable is prevented even if the split case is closed with the cable inserted. As a result, the cable is not sandwiched between the joining surfaces of the split magnetic bodies, and thus the split case can be easily closed and integrated without damaging the cable.

[Brief description of drawings]

FIG. 1 is a front view showing an opened state of a noise absorber according to a first exemplary embodiment.

FIG. 2 is a perspective view showing a mounted state of the noise absorber according to the first embodiment.

FIG. 3 is a front view showing a split case of the noise absorber according to the second embodiment.

FIG. 4 is a front view showing a conventional noise absorber.

[Explanation of symbols]

 1a, 1b Split magnetic bodies 2a, 2b Insertion recessed part 3 Joining surface 4a, 4b Split case 5a, 5b Insertion hole 6 Hinge 7 Joining part 8, 9 Tightening member 11 Cable 12a, 12b Side surface 13 Projection part 14 Recessed part 15 Guide member

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[Procedure amendment]

[Submission date] January 14, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Change

[Correction content]

Embodiment 2 FIG. 3 is a front view showing a split case of the noise absorber of Embodiment 2. As shown in FIG. In this embodiment, the divided cases 4a and 4b have the same structure as that of FIG. 4, and the U-shaped guide member 15 is provided on the side surface 12a of one of the divided cases 4a.
Mounted or molded integrally with the split case 4a
And the tip thereof is the protrusion 13. The noise absorber of this embodiment is also attached to the cable 11 in the same manner as in the first embodiment, and has the same effect.

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 1

[Correction method] Change

[Correction content]

[Figure 1]

[Procedure 3]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 3

[Correction method] Change

[Correction content]

[Figure 3]

[Procedure amendment 4]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 4

[Correction method] Change

[Correction content]

[Figure 4]

Claims (1)

[Claims] 1. A split magnetic body having an insertion recess and a joint surface for inserting a cable, and an openable and closable split case having an insertion hole and a joint surface corresponding to the insertion recess and accommodating the split magnetic body, respectively. And a protruding portion protruding on at least one side surface of the divided case so as to prevent movement of the inserted cable.