JP3483532B2 - Noise absorber - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a noise absorber which is externally fitted to an electric wire of an electronic device and absorbs a noise current generated inside the electronic device or a noise current generated outside.

[0002]

2. Description of the Related Art As a method of absorbing noise flowing in a current, a ferrite, which is a magnetic material, is fitted around the electric wire,
A technique is known in which this ferrite absorbs a noise current flowing through an electric wire. Conventionally, as a noise absorber using such a ferrite, one plane that passes through the center is
There is one in which the divided hollow cylindrical ferrites are individually housed in a two-divided storage portion, and the two-divided storage portion in which the ferrite is stored can be opened and closed via a hinge portion.

In the noise absorber thus constructed, if the electric wire is sandwiched between the above-mentioned two divided ferrites to close the storage portion, the electric wire is surrounded by ferrite which is a magnetic material, and the electric wire flows. It can absorb noise from the electric current. Further, in this type of noise absorber, it is also considered that a locking member is provided on the side of each of the storage sections that is not connected by the hinge section to hold each of the storage sections in the closed position.

[0004]

However, in this type of noise absorber, a sufficient noise absorbing effect may not be obtained unless the two-divided ferrites come into close contact with each other when the storage part is closed. Further, when the ferrite is stored in the storage portion, it is necessary to apply a large force to deform the storage portion, and the manufacturing cost of the noise absorber itself is high. Therefore, the present invention has been made for the purpose of providing a noise absorber which is easy to manufacture and has a good noise absorbing effect.

[0005]

In order to achieve the above-mentioned object, the invention according to claim 1 has a plurality of magnetic bodies divided so as to form an electric wire housing hole by combining them with each other. A plurality of storage parts that are divided so as to each store, a hinge part that connects the storage parts to each other, and a storage part that is provided on a side of the storage parts that is not connected by the hinge part. And a locking member for locking the magnetic member in a closed position, wherein the deformation assisting portion facilitates storage of the magnetic body by elastically deforming the storage portion in at least one of the storage portions. In addition, the inner peripheral surface of the accommodating portion and the magnetic material are provided so that the restoring force applied to the accommodating portion from the elastically deformed state after accommodating the magnetic material acts in the direction of pushing the magnetic material out of the accommodating portion. Outer peripheral surface Characterized by being configured to non-similar.

In the present invention thus constructed, since the deformation assisting portion is provided in the accommodating portion, it becomes easy to elastically deform the accommodating portion in a direction that facilitates accommodating the magnetic material, and As a result, the work of storing the magnetic body in the storage portion becomes easy. Therefore, the noise absorber of the present invention can be easily manufactured and the manufacturing cost thereof can be favorably reduced.

If the magnetic material is stored by elastically deforming the storage portion in this way, then a restoring force for the above deformation acts on the storage portion. Therefore, in the present invention, the restoring force is exerted in the direction in which the magnetic body is pushed out of the storage section by configuring the inner peripheral surface of the storage section to be dissimilar to the outer peripheral surface of the magnetic body. For this reason, the magnetic body pushed out from the above-mentioned storage portion adheres well to the other magnetic body, so that the present invention can favorably improve the noise absorption effect.

According to a second aspect of the present invention, in addition to the structure according to the first aspect, an elasticity for locking the magnetic body accommodated in the storage portion to the opening portion of the at least one storage portion from the opening side. It is characterized in that a deformable protrusion is formed. In the present invention, since the magnetic body pushed out from the storage portion by the restoring force is locked by the protrusion, it is possible to favorably prevent the magnetic body from falling off. Further, at this time, the magnetic body is sandwiched by the force in the pushing direction applied from the inner peripheral surface of the storage section and the locking force of the protrusion, and the magnetic body can be favorably fixed to the storage section.

Further, since the protrusion is elastically deformable, when the magnetic body is pushed out by the force applied from the inner peripheral surface of the storage portion, the protrusion is also deformed to some extent, and the magnetic body is favorably displaced in the pushing direction. You can Therefore, the above-described effect of adhering the magnetic body to another magnetic body by being extruded is maintained as it is even though the protrusion is provided. Therefore, in the present invention, in addition to the effect of the first aspect of the present invention, there is an effect that the magnetic body can be more satisfactorily fixed to the storage portion to improve the operability of the noise absorber.

The invention according to claim 3 is the invention according to claim 1 or 2.
In addition to the configuration described above, the magnetic substance is
It is divided, and the deformation assisting portion is provided in at least one of the housing portions, and the inner peripheral surface of the housing portion and the outer peripheral surface of the magnetic body housed in the housing portion are configured in the dissimilar manner. It is characterized by having done.

In the present invention, since the magnetic body is divided into two by one plane, the force in the pushing direction acts perpendicularly on the division plane, and the adhesion between the magnetic bodies is further improved. Therefore, according to the present invention, in addition to the effect of the invention described in claim 1 or 2, there is an effect that the manufacturing is easier and a better noise absorbing effect is obtained.

According to a fourth aspect of the present invention, in addition to the structure according to the third aspect, the locking member is formed on the locking claw formed on the outer peripheral wall surface of the one storage section and on the other storage section. And a locking hook that engages with the locking claw from the outside, and a distance between the locking hook and the hinge is shorter than a distance between the locking claw and the hinge. Is characterized by.

In the present invention, the locking hook formed in the other storage section is engaged with the locking claw formed in the one storage section from the outside to close the two-part storage section. Can be locked in position. Further, in the present invention, the distance between the locking hook and the hinge portion is shorter than the distance between the locking claw and the hinge portion. Therefore, when the locking hook is engaged from the outside, the distance between the locking claw and the hinge portion is further compressed, and this compressive force also generates a force for pushing the magnetic body out of the housing portion. Therefore, in the present invention, in addition to the effect of the third aspect of the invention, there is an effect that the magnetic bodies can be more closely adhered to each other and the noise absorption effect can be further improved.

When the other storage section is made thicker than the one storage section so that it is less likely to be deformed, the locking hook is pulled by the locking claw to allow the other storage section to move. It is possible to favorably prevent the spread. Therefore, in this case, the compressive force can be more favorably applied to the one accommodation portion, and the magnetic bodies can be more favorably brought into close contact with each other to further improve the noise absorption effect.

According to a fifth aspect of the present invention, in addition to the structure according to any one of the first to fourth aspects, the outer peripheral surface of the magnetic body is formed of a cylindrical surface, and the inner peripheral surface of the accommodating portion is made of the magnetic material. It is characterized in that a cylindrical surface with which the outer peripheral surface of the body is fitted is further provided with a pair of smooth projecting portions facing each other with the deformation assisting portion interposed therebetween.

According to the present invention, the inner peripheral surface of the accommodating portion is provided with a pair of smooth projecting portions opposed to the cylindrical surface with which the outer peripheral surface of the magnetic body is fitted, with the deformation assisting portion interposed therebetween. There is. Therefore, after the storage part is deformed around the deformation assisting part to store the magnetic body, the restoring force described above acts in a direction in which the protrusions are brought close to each other. Since the protrusion has a smooth surface shape and the outer peripheral surface of the magnetic body is also a cylindrical surface, the magnetic body is satisfactorily pushed out of the storage portion when the protrusions approach each other. Therefore, in the present invention, claim 1
In addition to the effect of the invention described in any one of to 4, the magnetic body can be more closely adhered to each other by further effectively exerting the force for pushing the magnetic body out of the storage portion, and further, the noise absorption effect can be further enhanced. The effect that it can be improved occurs.

According to a sixth aspect of the present invention, in addition to the structure according to any one of the first to fourth aspects, the outer peripheral surface of the magnetic body is formed of a cylindrical surface, and the inner peripheral surface of the accommodating portion is made of the magnetic material. It is characterized in that a cylindrical surface with which the outer peripheral surface of the body is fitted is further provided with an inclined surface, a rib, or a projection which faces each other with the deformation assisting portion interposed therebetween.

In the present invention, an inclined surface, a rib, or a protrusion is provided instead of the protrusion of the fifth aspect. These configurations also function almost the same as the protrusion according to claim 5,
The same action / effect is produced. Therefore, in the present invention, in addition to the effect of the invention according to any one of claims 1 to 4, by making the force for pushing the magnetic body out of the storage portion work better, the magnetic bodies are brought into close contact with each other, As a result, there is an effect that the noise absorption effect can be further improved.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view showing the configuration of a noise absorber to which the present invention is applied. As shown in Figure 1,
The noise absorber of the present embodiment is configured by the holding case 1 and the ferrite 5 as a magnetic body, and the holding case 1
Is two storage units 2, 3 connected via a hinge unit 4.
And a locking member described later. The storage parts 2 and 3 are
It is formed so as to house the ferrite 5 in a shape in which the hollow cylinder is divided into two along one side along the central axis.

Projections 6 for pressing the ferrite 5 from above (opening side) are formed so as to project from the four corners of the substantially cylindrical inner peripheral surface of the accommodating portions 2, 3. Each protrusion 6 is curved in an arc shape downward. In addition, on the upper surface of the ferrite 5 facing the protrusion 6,
Each notch 5a is formed.

On the other hand, on both axial end faces of the storage parts 2 and 3,
A slit 7 as a deformation assisting portion is formed in the center from above, and a pair of smooth protruding portions 8 facing each other with the slit 7 sandwiched between the inner peripheral surfaces of the accommodating portions 2 and 3 are provided with a shaft of the inner peripheral surface. It is formed over the entire length in the direction (see FIG. 2). Also,
A locking claw 11 is formed on the outer peripheral wall surface of the storage part 2 that is not connected to the hinge part 4, and a locking claw 11 is formed on the outer peripheral wall surface of the storage part 3 that is not connected to the hinge part 4. A locking hook 12 that is engaged from the outside is formed. The locking claw 11 and the locking hook 12 correspond to the locking member described above.

By accommodating the ferrite 5 in each of the accommodating portions 2 and 3, the noise absorber of this embodiment is completed. FIG. 2 is a vertical sectional view and a front view showing the manufacturing process. As shown in the cross-sectional view of FIG. 2A, when the ferrite 5 is inserted into the storage portions 2 and 3, the outer peripheral surface of the ferrite 5 contacts the upper surface of the protrusion 6. FIG. 2B is a front view showing the state.

When the ferrite 5 is further pushed in from this state, the accommodating portions 2 and 3 are elastically deformed so as to open the slit 7, and when the notch 5a is pushed below the protrusion 6, the protrusion 6 is cut. And a restoring force for returning to the original shape acts on the storage portions 2 and 3. Thus, when the restoring force in the direction of closing the slit 7 acts, the protruding portion 8
Are close to each other while contacting the outer peripheral surface of the ferrite 5. Therefore, the ferrite 5 is pushed up by the protrusion 8 and is firmly sandwiched between the ferrite 5 and the protrusion 6 as shown in the sectional view of FIG. FIG. 2D is a front view showing the state. When the ferrite 5 is housed in the housings 2 and 3 in this way, the noise absorber of the present embodiment is completed.

Here, in the present embodiment, the storage portions 2, 3
Since the slit 7 is provided in the housing, the storage portions 2 and 3 are extremely easily deformed when the ferrite 5 is pushed in, and by extension, the noise absorber is easily manufactured and the manufacturing cost thereof is favorably reduced. be able to. Further, since the protrusion 8 has a smooth surface shape and the ferrite 5 has a cylindrical outer peripheral surface, the ferrite 5 is favorably pushed up by the protrusions 8 coming close to each other by the restoring force. The ferrite 5 is firmly sandwiched by this pushing-up force and the locking force of the projection 6, and can be fixed extremely well in the storage portions 2 and 3. Moreover, as shown in FIG. 2C, at this time, the protrusion 6 is deformed to some extent, and the ferrite 5 is also displaced to a certain degree upward, so that the accommodating portions 2 and 3 are arranged at the closed position as follows. Then, the ferrites 5 can be extremely well adhered to each other when used.

Next, a method of using this noise absorber will be described. As shown in FIGS. 3A and 3B, an electric wire (not shown) is arranged in a hollow portion (corresponding to an electric wire accommodating hole) of the ferrite 5 and the accommodating portion is centered around the hinge portion 4. By closing 2 and 3 and engaging the locking hook 12 with the locking claw 11 from the outside, the storage sections 2 and 3 are held in the closed position. At this time, since the electric wire is held in the hollow portion of the ferrite 5 and the ferrites 5 are closely attached to each other around the hollow portion, noise can be favorably absorbed from the electric wire. Further, at this time, the end faces of the ferrites 5 facing each other receive the pressing force of the projecting portion 8 vertically from the back of each ferrite 5 and strongly adhere to each other. Therefore, in the present embodiment, it is possible to absorb the noise very well.

Further, if the distance A (for example, 26 mm) between the locking hook 12 and the hinge portion 4 is set shorter than the distance B (for example, 27 mm) between the locking claw 11 and the hinge portion 4, As shown in FIG. 3C, when the locking hook 12 is engaged with the locking claw 11, the distance between the locking claw 11 and the hinge portion 4 is compressed from B to A. Then, this compression force also causes the ferrite 5 to receive a pressing force from the projecting portion 8, and the ferrites 5 can be more closely attached to each other.
Therefore, in this case, the noise absorption effect can be further improved. At this time, as shown in FIG. 3 (D), the slit 7 of the storage section 2 is further closed than the initial shape.

Further, in this case, if the storage part 3 is made thicker than the storage part 2 so as not to be easily deformed, the locking hook 12 is pulled by the locking claw 11 so that the storage part 3 is stored. Can be effectively prevented from spreading. Therefore, in this case, the compression force can be applied to the housing portion 2 more satisfactorily, and the ferrites 5 can be even more closely adhered to each other to further improve the noise absorption effect.

Although the present invention has been described above with reference to the specific embodiments, the present invention is not limited to the above-described embodiments, and various embodiments are possible without departing from the gist of the present invention. It can be carried out. For example, the magnetic body and the storage portion may be divided into three or more pieces, and the form of the locking member can be variously considered.

Further, various forms can be considered in which the restoring force applied to the storage portion is converted into a force for pushing out the magnetic body.
For example, instead of the protruding portion 8, a mere inclined surface 81 may be provided as shown in FIG. 4 (A), or some ribs 82 may be provided as shown in FIG. 4 (B). Some protrusions 83 may be provided as shown in FIG. These configurations also function almost similarly to the protruding portion 8 and produce the same operation and effect.

Further, as the deformation assisting portion, in addition to the slit 7, both end surfaces of the accommodating portions 2 and 3 may be formed low,
It is also possible to employ a thin-walled portion formed at substantially the same position as the slit 7, or a recessed portion or an arc-shaped cutout portion formed at substantially the same position as the slit 7, and in this case as well, it is possible to adopt a configuration similar to that of the above-described embodiment. Similar actions and effects occur.

Note that FIG. 5 is attached with reference to a design plan of a noise absorbing tool as a concrete embodiment for which commercialization is planned.

[Brief description of drawings]

FIG. 1 is a perspective view showing a configuration of a noise absorber to which the present invention is applied.

2A and 2B are a longitudinal sectional view and a front view showing a method for manufacturing the noise absorber.

FIG. 3 is a vertical sectional view and a front view showing a method of using the noise absorber.

FIG. 4 is a vertical cross-sectional view and a perspective view showing a configuration of various modified examples of the noise absorber.

FIG. 5 is a design plan view showing a configuration of a specific example of the noise absorber.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Holding case 2, 3 ... Storage part 4 ... Hinge part 5 ... Ferrite 5a ... Notch 6 ... Protrusion 7 ... Slit 8 ... Projection part 11 ... Locking claw 12 ... Locking hook 81 ... Inclined surface 82 ... Rib 83 ... Projection

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Claims (6)

(57) [Claims] 1. A plurality of storage parts which are divided so as to respectively store a plurality of magnetic bodies which are divided so as to form an electric wire storage hole by being combined with each other, and the respective storage parts are connected to each other. A noise absorber comprising: a hinge portion; and a locking member that is provided on a side of each of the storage portions that is not connected by the hinge portion and that locks each of the storage portions in a closed position. A deformation assisting portion that elastically deforms the storage portion to facilitate the storage of the magnetic body is provided in each of the storage portions, and a restoring force applied to the storage portion from the elastically deformed state after storing the magnetic body is provided. A noise absorber characterized in that an inner peripheral surface of the housing and an outer peripheral surface of the magnetic body are dissimilar in order to act the magnetic body in a direction of pushing the magnetic body out of the housing. 2. An elastically deformable projection for locking the magnetic material housed in the housing from the opening side is formed in the opening of the at least one housing. The noise absorber described. 3. The magnetic body is divided into two parts by one plane, and at least one of the storage parts is provided with the deformation assisting part, and is housed in the inner peripheral surface of the storage part and the storage part. The noise absorber according to claim 1 or 2, wherein the outer peripheral surface of the magnetic body is configured to be dissimilar. 4. The locking member includes a locking claw formed on an outer peripheral wall surface of the one storage section, and a locking hook formed in the other storage section and engaged with the locking claw from the outside. The noise absorber according to claim 3, wherein the distance between the locking hook and the hinge portion is shorter than the distance between the locking claw and the hinge portion. 5. The outer peripheral surface of the magnetic body is formed of a cylindrical surface, and the inner peripheral surface of the housing portion is a cylindrical surface to which the outer peripheral surface of the magnetic body fits, with the deformation assisting portion sandwiched therebetween. A pair of opposed smooth projections is provided.
4. The noise absorber according to any one of 4 above. 6. The outer peripheral surface of the magnetic body is formed of a cylindrical surface, and the inner peripheral surface of the housing portion is fitted on the cylindrical surface to which the outer peripheral surface of the magnetic body fits, with the deformation assisting portion interposed therebetween. The noise absorber according to any one of claims 1 to 4, wherein the noise absorber has opposing inclined surfaces, ribs, or protrusions.