JP4644908B2 - Noise absorber - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a noise absorber that absorbs a noise current flowing in an electric wire or a noise electromagnetic wave generated by the electric wire.
[0002]
[Prior art]
Conventionally, a noise absorber that absorbs a noise current flowing in an electric wire or a noise electromagnetic wave generated by the electric wire is known, for example, in Japanese Patent Laid-Open No. 7-272936.
[0003]
FIG. 4 is an exploded perspective view of a conventional noise absorber.
[0004]
As shown in FIG. 4, this noise absorber is accommodated in two container-shaped covers 21 in which two semi-cylindrical ferromagnetic bodies 20 are hinged, and the two container-shaped covers 21 are combined. Thus, the two ferromagnetic bodies 20 housed in the cover 21 form a hollow portion and a closed magnetic path, and a part of the electric wire is surrounded by the two ferromagnetic bodies 20 that form the closed magnetic path. The noise current flowing in the electric wire or the noise electromagnetic wave generated by the electric wire is absorbed.
[0005]
The attachment structure of the ferromagnetic body 20 to the cover 21 in the noise absorber will be described. The ferromagnetic body 20 has a latching recess 22 on the inner side of both end faces thereof, and the cover 21 has end plates on both ends thereof. Has a notch 24 that reaches the bottom of the container on both sides of the latching claw 23. When the ferromagnetic body 20 is fitted into the cover 21, the cover 21 is latched. The claw 23 engages with the retaining recess 22 of the ferromagnetic body 20, and the ferromagnetic body 20 is fixed to the cover 21. Here, the hooking claw 23 has notches 24 reaching the bottom of the container on both sides, so that it becomes easy to bend, and the work when the ferromagnetic body 20 is housed in the cover 21 is made easy.
[0006]
[Problems to be solved by the invention]
However, the above-described noise absorber is provided on both sides of the hooking claw 23 in order to make the hooking claw 23 in the cover 21 flexible and facilitate workability when the ferromagnetic body 20 is housed in the cover 21. The interval between the notches 24 may be narrowed. However, if this interval is narrowed, the strength of the holding portion of the latching claw 23 is lowered, and when the ferromagnetic body 20 is stored in the cover 21, it is applied by the force of inserting the ferromagnetic body 20. The holding part of the pawl 23 may break. Conversely, if the gap between the notches 24 on both sides of the latching claw 23 is widened so as not to decrease the holding portion strength of the latching claw 23, it becomes difficult to bend when the ferromagnetic body 20 is housed in the cover 21, and a large insertion force. Therefore, the work becomes difficult, and there are cases where the latching claw 23 is deformed and the ferromagnetic body 20 cannot be securely stored in the cover 21.
[0007]
In view of the above, the present invention provides a noise absorber capable of easily inserting a ferromagnetic material into a container-shaped cover and securely storing the ferromagnetic material in a container-shaped cover, while paying attention to the conventional problems described above. With the goal.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the present invention accommodates two semi-cylindrical ferromagnetic materials in two container-shaped covers, respectively, and the two container-shaped covers are combined to be accommodated in the cover. The two ferromagnets that form a hollow part and a closed magnetic circuit, and a part of the wire is surrounded by the two ferromagnets that form the closed magnetic circuit, thereby generating a noise current flowing in the wire or an electric wire. A noise absorber configured to absorb noise electromagnetic waves, the hooking claw provided on the inner side of the end plates at both ends of the container-shaped cover, and provided on the inner side of the surfaces of both ends of the ferromagnetic body, A latching recess for latching the latching claw, an insertion guide groove that is provided outside the surfaces of both ends of the ferromagnetic body and guides the latching claw when the ferromagnetic body is inserted into the cover, Both sides of the latching claw on the end plates at both ends of the cover Provided with a longitudinal groove for assisting the deflection of the latching claw, wherein the latching recess and the insertion guide groove are provided separately on the surface of the ferromagnetic body, and the ferromagnetic body is attached to the cover. When inserted, the latching claw is first guided by the insertion guide groove, then passes through the surfaces of both ends of the ferromagnetic material, and is finally latched by the latching recess. is there.
[0009]
According to the present invention, it is possible to provide a noise absorber that can easily insert a ferromagnetic body into a container-like cover and store the ferromagnetic body, and can reliably hold the ferromagnetic body.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
According to the first aspect of the present invention, two semi-cylindrical ferromagnetic materials are respectively accommodated in two container-shaped covers, and the two container-shaped covers are combined to be accommodated in the cover. The two ferromagnets that form a hollow part and a closed magnetic circuit, and a part of the wire is surrounded by the two ferromagnets that form the closed magnetic circuit, the noise current flowing in the wire or the noise generated by the wire A noise absorber configured to absorb electromagnetic waves , provided on the inner side of the end plates on both ends of the container-like cover, and on the inner side of the both ends of the ferromagnetic material. A latching recess for latching, an insertion guide groove that is provided outside the surfaces of both ends of the ferromagnetic material and guides the latching claw when the ferromagnetic material is inserted into the cover, and a latch on the end plates at both ends of the cover Equipped with vertical grooves on both sides of the pawls to assist the deflection of the pawls The latching recess and the insertion guide groove are provided separately on the surface of the ferromagnetic body. When the ferromagnetic body is inserted into the cover, the latching claw is first guided by the insertion guide groove, and then the ferromagnetic body When the ferromagnetic material is stored in the container-like cover by passing over the surfaces of both ends and finally being hooked in the hooking recess, even if there are hooking claws inside the end plates on both sides of the cover, It is possible to insert the ferromagnetic material partway in the cover, the insertion force can be reduced, and the operation of storing the ferromagnetic material in the cover is facilitated.
[0014]
Embodiments of the present invention will be described below with reference to the drawings.
[0015]
(Embodiment 1)
FIG. 1 is an exploded perspective view of the noise absorber according to Embodiment 1 of the present invention, FIG. 2 is a view taken in the direction of arrow A in FIG. 1, and FIG. 3 is when inserting a ferromagnetic body into a cover of the noise absorber. FIG.
[0016]
As shown in FIGS. 1 and 2, the noise absorber has a concave groove 8 and its side end as a contact surface 9, that is, two ferromagnets 1 having a semi-cylindrical shape and an open magnetic path, Each of the two ferromagnetic bodies 1 is housed and is composed of two container-like covers 2 connected by hinges 3, and the two container-like covers 2 are combined to be accommodated in the cover 2 2. One open magnetic path ferromagnetic material 1 forms a hollow portion and a closed magnetic circuit, and a part of the electric wire is surrounded by the two ferromagnetic materials 1 that form the closed magnetic circuit, so that a noise current flowing in the electric wire or It is designed to absorb noise electromagnetic waves emitted by electric wires.
[0017]
Next, a configuration for fixing the two semi-cylindrical ferromagnetic bodies 1 to the two container-like covers 2 as an important feature of the present invention will be described.
[0018]
The ferromagnetic body 1 has a latching recess 5 inside the end faces on both sides and a guide groove 7 for insertion outside the end faces on both sides. The cover 2 has a latching claw 4 for holding the ferromagnetic material 1 inside the end plates 14 at both ends so that the stored ferromagnetic material 1 does not come off. Further, the two covers 2 have hooks 10 and hook projections 11 on the side portions in order to keep the cover united. Furthermore, the cover 2 has a part of the bottom plate 15 as an oblique bottom surface 16, and two elastic pieces 13 are provided on the oblique bottom surface 16. The two elastic pieces 13 are positioned substantially symmetrically with respect to the length direction of the cover 2 and are integrally formed with the cover 2. Further, a notch 6 for assisting deflection of the end plate 14 is provided at a part of the joint between the end plate 14 and the bottom plate 15 at both ends, and is provided on the inner surface of the end plate 14 and on both sides of the latching claw 4. A vertical groove 12 is provided to assist the deflection of the four portions of the hooking claw.
[0019]
More specifically with reference to FIG. 3, insertion guide grooves 7 and latching recesses 5 of the latching claws 4 of the cover 2 are provided on both end faces of the ferromagnetic body 1 as shown in FIG. Therefore, when the ferromagnetic material 1 is stored in the cover 2, even if there are the latching claws 4 inside the end plates 14 on both sides of the cover 2, the insertion guide groove 7 as shown in FIG. The ferromagnetic body 1 can be inserted partway through the cover 2, and the insertion force can be reduced. That is, it is possible to reduce the force applied to the latching claw 4 and to reduce the deformation of the latching claw 4 that has occurred in the past. Therefore, as shown in FIG. The ferromagnetic body 1 can be held and stored.
[0020]
Further, the latching claw 4 is completely fixed to the end plates 14 at both ends of the cover 2, and there is no latching claw holding portion, and the end plate 14 is partly connected to the end plate 14 and the bottom plate 15 at both ends. Since the notch 6 for bending support is provided, when the ferromagnetic body 1 is stored in the cover 2, the entire end plates 14 at both ends of the cover 2 are easily bent in a direction opposite to the magnetic body storing portion. As described above, the ferromagnetic claw 1 can be easily accommodated in the cover 2 without breaking the latching claw holding portion.
[0021]
Further, the longitudinal plates 12 for assisting the deflection of the latching claw 4 part are provided on both sides of the latching claw 4 on the inner surface of the end plate 14 of the cover 2 so that the end plate 14 of the cover 2 can be easily provided. Deflection and the ferromagnetic body 1 can be accommodated easily.
[0022]
In addition, by providing the elastic piece 13 on the inner bottom of the container-like cover 2, the ferromagnetic body 1 accommodated in the container-like cover 2 is pushed up by the elastic piece 13 and is covered by the latching recess 5 of the ferromagnetic body 1. 2 can be reliably latched, and the ferromagnetic body 1 in the container-like cover 2 can be stabilized.
[0023]
As described above, in the first embodiment of the present invention, two semi-cylindrical ferromagnetic bodies 1 are respectively accommodated in two container-shaped covers 2, and the two container-shaped covers 2 are combined to provide a cover. The two ferromagnetic bodies 1 housed in 2 form a hollow portion and a closed magnetic path, and flow into the electric wire by surrounding a part of the electric wire with the two ferromagnetic bodies 1 forming the closed magnetic path. A noise absorber configured to absorb a noise current or a noise electromagnetic wave generated by an electric wire, wherein a hooking claw 4 is provided inside the end plates 14 at both ends of the cover 2, and the above described inside of the surfaces of both ends of the ferromagnetic body 1. The latching recess 5 for latching the latching claw 4 has a configuration in which the insertion guide groove 7 of the latching claw 4 is provided on the outside, and a part of the joint between the end plate 14 and the bottom surface 15 at both ends of the cover 2. The structure in which the notch 6 for providing deflection of the end plate 14 is provided in the With the structure in which the vertical grooves 12 for bending support of the hooking claws 4 part are provided on both sides of the hooking claws 4 in the end plates 14 at both ends of the cover 2, a part of the bottom plate 15 of the cover 2 is an inclined bottom surface 16, With the configuration in which the elastic piece 13 is provided on the oblique bottom surface 16, the ferromagnetic body 1 can be easily stored in the cover 2, and the ferromagnetic body 1 can be securely held on the cover 2.
[0024]
【The invention's effect】
As is clear from the above description, according to the present invention, two semi-cylindrical ferromagnetic bodies are accommodated in two container-shaped covers, respectively, and the two container-shaped covers are combined to provide a cover. The two ferromagnets housed in the wire form a hollow portion and a closed magnetic circuit, and by surrounding a part of the wire with the two ferromagnets that form the closed magnetic circuit, the noise current flowing in the wire or In the noise absorbing device configured to absorb noise electromagnetic waves generated by the electric wire, an advantageous effect is obtained that the ferromagnetic material can be easily inserted into the container-like cover and stored, and the ferromagnetic material can be securely held.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a noise absorber according to a first embodiment of the present invention. FIG. 2 is a view taken along arrow A in FIG. 1. FIG. 3 is an assembly when a ferromagnetic material is inserted into a cover of the noise absorber. Explanatory drawing [Figure 4] Exploded perspective view of a conventional noise absorber [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Ferromagnetic material 2 Cover 3 Hinge 4 Latch claw 5 Latch recessed part 6 Notch 7 Guide groove 8 Recess groove 9 Contact surface 10 Hook 11 Hook convex part 12 Vertical groove 13 Elastic piece 14 End plate 15 Bottom plate 16 Diagonal bottom

Claims (1)

Two semi-cylindrical ferromagnets are accommodated in two container-shaped covers, respectively, and the two ferromagnets accommodated in the cover form a hollow portion by combining the two container-shaped covers. And a noise absorber configured to absorb a noise current flowing in the wire or a noise electromagnetic wave generated by the wire by forming a closed magnetic circuit and surrounding a part of the wire with the two ferromagnetic materials forming the closed magnetic circuit. A latching claw provided inside the end plates at both ends of the container-like cover, a latching recess provided inside the both end surfaces of the ferromagnetic body, and latching the latching claw An insertion guide groove which is provided outside the surfaces of both ends of the ferromagnetic body and guides the latching claw when the ferromagnetic body is inserted into the cover; and the latching on the end plates at both ends of the cover Provided on both sides of the nail to assist the deflection of the hooking nail The latching recess and the insertion guide groove are provided separately on the surface of the ferromagnetic body, and when the ferromagnetic body is inserted into the cover, A noise absorber , which is guided by the insertion guide groove, then passes over the surfaces of both ends of the ferromagnetic material, and is finally hooked by the hook recess .

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