JP4699802B2 - Noise reduction equipment - Google Patents

Description

  The present invention relates to a noise reduction instrument that is attached to an electric cable to prevent noise generation.

  As a noise reduction device for preventing noise generation by being attached to an electric cable, a cylindrical magnetic body as described in Patent Document 1 or a cylindrical magnetic material as described in Patent Document 2 is used. A body that is divided into two and housed in a clamp case that can be opened and closed is known. In addition, a noise absorbing sheet that is not attached to an electric cable but is affixed to a housing such as a substrate has been proposed (Patent Document 3, etc.).

JP 2001-155925 A Japanese Patent No. 3556172 Japanese Patent No. 3520257

  However, in the configuration of Patent Document 1, when connectors or the like are provided at both ends of the electric cable, the electric cable may not be allowed to pass through the cylindrical magnetic body. Limited to application to electric cables with open ends. In the thing of patent document 2, although it can apply also to the electric wire cable with which the connector etc. were provided in both ends, an electric wire cable is divided between the edge of the flat part and inner peripheral surface of the hard magnetic body which were divided into two at the time of clamping. It may be pinched by mistake, and the skin of the electric cable may be damaged. In addition, there are a plurality of types of cross-sectional diameters and cross-sectional shapes (circular, oval diameter, etc.) of electric wire cables. Patent Document 2 discloses an inner circumference of a cylindrical magnetic body in which the applicable electric wire cable is divided into two parts. It tends to be influenced by the shape, and its application range tends to be limited.

  Accordingly, an object of the present invention is to provide a noise reduction instrument that does not damage an electric cable when it is attached and can be applied to a wider variety of electric cables.

According to the present invention, in a noise reduction device including a magnetic body that is attached to an electric wire cable and disposed around the electric wire cable, the magnetic body is a flexible belt-like body, and the electric wire cable A support member for supporting the magnetic body in an annular shape so that the magnetic body surrounds the electric cable, and the support member is disposed along an outer surface of the magnetic body. A belt-shaped portion having flexibility, a locking portion that releasably locks the end of the belt-shaped portion, and a hill portion that is juxtaposed with the locking portion, and when locked by the locking portion The belt-shaped portion has a substantially annular shape, and the magnetic body has one end on the end side of the belt-shaped portion and the other end disposed on the hill, and the other of the magnetic bodies. When the end is attached to the electric cable, the end face is the end Noise reduction device is provided which is characterized in that it is disposed in the hill portion in contact with the inner surface of the one end portion of the sexual body.
Further, according to the present invention, in the noise reduction device provided with the magnetic body that is attached to the electric wire cable and disposed around the electric wire cable, the magnetic body is a flexible belt-like body, The magnetic member further includes a support member that annularly supports the magnetic body so that the magnetic body surrounds the electric wire cable, and the support member is disposed along an outer surface of the magnetic body. A flexible belt-like portion and a cylindrical portion into which one end of the belt-like portion is inserted, and a locking portion in which the one end of the belt-like portion is releasably locked. A cylindrical base connected to the other end of the belt-like portion; a lower end surface on both the left and right sides of the base; and a side surface of the magnetic body at the other end of the belt-like portion ; On the one end side of the strip-shaped part And the side surface of the magnetic substance at the site of, to contact, the noise reduction device, characterized in that it and a separate magnetic body and the magnetic body is provided.

According to the noise reduction device of the present invention, since the magnetic body is a flexible belt-like body, the wire cable is not damaged when attached to the wire cable, and is deformed according to the shape of the wire cable. Since it is possible, it can be applied to a wide variety of electric cables. Further, by providing the support member, it is possible to stabilize the shape of the magnetic body at the time of mounting on the electric cable, and it can be more easily mounted on the electric cable. Examples of the electric cable include a power cable and a signal cable.

  Further, in the present invention, the locking portion has a locking position at an end of the band-shaped portion so that the size of the ring formed by the band-shaped portion can be adjusted when locked by the locking portion. A configuration in which multiple selections can be made can be adopted. According to this structure, one said noise reduction instrument can be applied to the multiple types of electric wire cable from which the magnitude | size of a cross section differs.

As described above, according to the present invention, it is possible to provide a noise reduction instrument that does not damage an electric cable when it is attached and can be applied to a wider variety of electric cables. In addition, the shape of the magnetic body at the time of attachment to the electric cable can be stabilized and can be attached to the electric cable more easily.

  Embodiments of the present invention will be described below with reference to the drawings.

<First Embodiment>
Fig.1 (a) and FIG.1 (b) are explanatory drawings of the noise reduction instrument 10 which concerns on 1st Embodiment of this invention. The noise reduction instrument 10 includes a magnetic body 11. The magnetic body 11 is a flexible belt-like body and can be created by a known method. For example, a magnetic powder is mixed into a resin to form a band, and the flexibility is adjusted depending on the type of resin and the mixing ratio of the magnetic powder. In the case of this embodiment, it is desirable that the resin is of a relatively flexible type such as silicone rubber.

  When the noise reduction instrument 10 is attached to the electric cable, the magnetic body 11 is wound around the electric cable to form an annular shape as shown in FIG. Adhering materials 12 and 13 such as double-sided tape are respectively disposed on the front and back of one end of the belt-like magnetic body 11. In order to hold the magnetic body 11 wound around the electric wire cable in an annular shape, the sticking material 12 has an end portion of the magnetic body 11 on the peripheral surface of the wound magnetic body 11 as shown in FIG. It is for sticking. The sticking material 13 functions as an attachment portion for fixing the noise reduction device 10 attached to the electric cable to the attachment object. The noise reduction device 10 is attached to the attachment object by the sticking material 13. The

  The attachment object is, for example, an electronic device to which an electric cable is connected, a desk, a wall, or the like around a place where the electronic device is installed. When the noise reduction device 10 is used for a game machine such as a pachinko machine or a slot machine, the inner wall of the case of the game machine can be used as an attachment object.

  In this embodiment, since the magnetic body 11 forms a flexible belt-like body, it can be mounted without damaging the electric cable. Moreover, since it is wound and mounted on an electric cable, it can be applied to an electric cable having an arbitrary diameter and cross-sectional shape.

Second Embodiment
FIG. 2A and FIG. 2B are explanatory diagrams of the noise reduction device 20 according to the second embodiment of the present invention. The noise reduction instrument 20 is applied to a flat cable as an electric cable, and includes magnetic bodies 21a and 21b. The magnetic bodies 21a and 21b are flexible strips (in this embodiment, the outer shape is the same), and can be created by a known method. For example, a magnetic powder is mixed into a resin to form a band, and the flexibility is adjusted depending on the type of resin and the mixing ratio of the magnetic powder.

  When attaching the noise reduction device 20 to the flat cable, magnetic bodies 21a and 21b are respectively arranged above and below the flat cable as shown in FIG. 2A, and the magnetic bodies 21a and 21b are arranged as shown in FIG. The magnetic bodies 21a and 21b are overlapped so as to sandwich a flat cable between 21b. Adhesive materials 22 such as double-sided tapes are respectively disposed at both ends of the belt-like magnetic body 21 b, and the magnetic bodies 21 a and 21 b are attached by the adhesive material 22. When the flat cable is wider than that shown in the figure, the width of the adhesive material 22 can be increased by increasing the distance between the adhesive materials 22 by narrowing the adhesive material 22 accordingly. It can respond also to a flat cable by changing the width | variety of the sticking material 22. FIG.

  In this embodiment, since the magnetic bodies 21a and 21b form a flexible belt-like body, the flat cable can be mounted without being damaged. In addition, the two magnetic bodies 21a and 21b are overlapped so as to sandwich the flat cable so that the flat cable is surrounded by the magnetic bodies 21a and 21b, and noise countermeasures can be taken. Applicable.

<Third Embodiment>
FIG. 3 is an explanatory diagram of a noise reduction device 30 according to the third embodiment of the present invention. The noise reduction instrument 30 includes a magnetic body 31, a rectangular plate-like base portion 32 on which the magnetic body 31 is mounted, and a sticking material 33 provided on the lower surface of the base portion 32. The magnetic body 31 is a flexible belt-like body and can be created by a known method. For example, a magnetic powder is mixed into a resin to form a band, and the flexibility is adjusted depending on the type of resin and the mixing ratio of the magnetic powder. In the case of the present embodiment, the magnetic body 31 is formed in an annular shape as shown in the figure in a natural state, and a resin having a certain degree of elasticity, such as plastic, is desirable. The magnetic body 31 and the base 32 may be integrally formed, or may be bonded or welded as separate bodies.

  When attaching the noise reduction device 30 to the electric cable, the one end 31 a of the magnetic body 31 is pinched and opened to the outside, and the electric cable is inserted into the ring formed by the magnetic body 31. Thereafter, when the end portion 31a is released, the magnetic body 31 elastically returns to the original form shown in FIG. 3, and the end portion 31a is in close contact with the other end portion. The sticking material 33 functions as an attachment part for fixing the noise reduction device 30 attached to the electric cable to the attachment target, and the noise reduction device 30 is stuck to the attachment target by the sticking material 33. The

  In this embodiment, since the magnetic body 31 has flexibility, it can be mounted without damaging the electric cable. In addition, the magnetic body 31 is formed in a substantially annular shape in a natural state, and can be easily attached to the electric cable because it is attached to the electric cable by pinching one end 31a and opening it outward. Furthermore, any wire cable can be attached as long as it has a shape and size that can be inserted into the ring formed by the magnetic body 31.

<Fourth embodiment>
4 (a) and 4 (b) are explanatory diagrams of the noise reduction device 40 according to the fourth embodiment of the present invention. The noise reduction device 40 includes a magnetic body 41, a support member 42, and an adhesive material 43. The magnetic body 41 is a flexible belt-like body and can be created by a known method. For example, a magnetic powder is mixed into a resin to form a band, and the flexibility is adjusted depending on the type of resin and the mixing ratio of the magnetic powder. In the case of this embodiment, it is desirable that the resin is of a relatively flexible type such as silicone rubber.

  The support member 42 is a member for supporting the magnetic body in a ring shape so that the magnetic body 41 surrounds the electric cable when the noise reduction device 40 is attached to the electric cable. A locking portion 42b formed at one end of the portion 42a, a rectangular plate-like base portion 42d in which the other end portion of the strip-like portion 42a is integrally connected, and a base-like portion provided on the base portion 42d. A locking portion 42c that releasably locks the locking portion 42b of the portion 42a. The support member 42 is made of, for example, plastic having elasticity to some extent.

  One end of the magnetic body 41 is disposed on the locking portion 42c, and is disposed along a part of the upper surface of the base portion 42d and the inner surface of the belt-like portion 42a, and the other end is the locking portion. It is disposed at the end of the belt-like portion 42a in front of 42b. The belt-like portion 42a is disposed along the outer surface of the magnetic body 41 so as to be in close contact therewith. The locking portion 42b has a substantially V-shaped cross section, and one side of the V-shape is integrally connected to the end of the belt-like portion 42a, and the other side is open. A stepped portion 42b 'is formed outside the midway portion of the other side. The locking portion 42c has a slit-like opening on its upper surface.

  When attaching the noise reduction device 40 to the electric cable, as shown in FIG. 4A, the electric cable is held by the magnetic body 41 and the belt-like portion 42a in a state where the engaging portions 42b and 42c are unlocked. Insert into the formed ring. Thereafter, when the locking portion 42b is inserted into the opening on the upper surface of the locking portion 42c, the narrow angle of the V-shape of the locking portion 42b is temporarily narrowed. The narrow angle of the V shape of the locking portion 42b is elastically restored to the original state through the opening. The stepped portion 42b is locked to the periphery of the lower surface of the opening of the locking portion 42c to prevent the locking portion 42b from coming off, and the locking portions 42b and 42c are locked as shown in FIG. .

  In the embodiment of FIG. 4B, both end portions of the magnetic body 41 are in contact with each other. Further, the belt-like portion 42 a has a substantially annular shape, and the magnetic body 41 is supported in an annular shape by the support member 42. The adhesive material 43 functions as an attachment part for fixing the noise reduction device 40 attached to the electric cable to the attachment object, and the noise reduction device 40 is attached to the attachment object by the adhesive material 43. The

  In this embodiment, since the magnetic body 41 has flexibility, it can be mounted without damaging the electric cable. Moreover, since it attaches to an electric cable by the latching | locking of the latching | locking parts 42b and 42c, it can be easily attached to an electric cable. Furthermore, any wire cable can be mounted as long as it has a shape and size that can be inserted into the ring formed by the magnetic body 41 (and the band-like portion 42a).

<Fifth Embodiment>
FIG. 5A and FIG. 5B are explanatory diagrams of a noise reduction device 50 according to the fifth embodiment of the present invention. The noise reduction device 50 includes a magnetic body 51, a support member 52, and an adhesive material 53. The magnetic body 51 is a flexible belt-like body and can be created by a known method. For example, a magnetic powder is mixed into a resin to form a band, and the flexibility is adjusted depending on the type of resin and the mixing ratio of the magnetic powder. In the case of this embodiment, it is desirable that the resin is of a relatively flexible type such as silicone rubber.

  The support member 52 is a member for supporting the magnetic body in a ring shape so that the magnetic body 51 surrounds the electric cable when the noise reduction device 50 is attached to the electric cable. A plurality of protrusion-like locking portions 52b formed on the upper surface of one end of the portion 52a, a rectangular plate-like base 52e integrally connected to the other end of the strip-like portion 52a, and the base 52e And a hill portion 52d on which one end of the magnetic body 51 is disposed, and a locking portion 52c that releasably locks the locking portion 52b of the belt-like portion 52a. The support member 52 is made of, for example, plastic having elasticity to some extent.

  One end portion of the magnetic body 51 is disposed on the hill portion 52d so that the end surface 51a faces the locking portion 52c, along a part of the upper surface of the base portion 52e and the inner surface of the belt-like portion 52a. The other end portion is disposed substantially flush with the end surface of the band-shaped portion 52a. The strip 52a is disposed along the outer surface of the magnetic body 51 so as to be in close contact therewith. Each locking portion 52b extends in the width direction of the strip-shaped portion 52a and is disposed at equal intervals in the longitudinal direction of the strip-shaped portion 52a. The locking portion 52c has a gate shape with an open front side.

  When the noise reduction device 50 is attached to the electric cable, the electric cable is held by the magnetic body 51 and the belt-like portion 52a in a state where the engagement between the engaging portions 52b and 52c is released as shown in FIG. Insert into the formed ring. Thereafter, when any one of the locking portions 52b is inserted into the opening of the locking portion 52c, the locking portions 52b and 52c are locked as shown in FIG.

  5B, the inner surface of the end portion of the magnetic body 51 on the locking portion 52b side is in contact with the end surface 51a of the magnetic body 51. Further, the belt-like portion 52 a has a substantially annular shape, and the magnetic body 51 is supported in an annular shape by the support member 52. Since the plurality of locking portions 52b are arranged in the longitudinal direction of the band-shaped portion 52a, a plurality of locking positions at the end of the band-shaped portion 52a can be obtained by selecting the locking portion 52b locked to the locking portion 52c. This allows the size of the ring formed by the band-like portion 52a (and the magnetic body 51) to be adjusted. The adhesive material 53 functions as an attachment part for fixing the noise reduction device 50 attached to the electric cable to the attachment object, and the noise reduction device 50 is attached to the attachment object by the adhesive material 53. The

  In this embodiment, since the magnetic body 51 has flexibility, it can be mounted without damaging the electric cable. Moreover, since it attaches to an electric wire cable by the latching | locking of the latching | locking parts 52b and 52c, it can be easily attached to an electric wire cable. Furthermore, by providing a plurality of locking portions 52b and making it possible to adjust the size of the ring formed by the band-shaped portion 52a, it is possible to attach the wire cable to various diameters and cross-sectional shapes.

<Sixth Embodiment>
FIG. 6 is an explanatory diagram of a noise reduction device 60 according to the sixth embodiment of the present invention. The noise reduction device 60 includes a magnetic body 61, a support member 62, and an adhesive material 63. The magnetic body 61 is a flexible belt-like body and can be created by a known method. For example, a magnetic powder is mixed into a resin to form a band, and the flexibility is adjusted depending on the type of resin and the mixing ratio of the magnetic powder. In the case of this embodiment, it is desirable that the resin is of a relatively flexible type such as silicone rubber.

  The support member 62 is a member for supporting the magnetic body in a ring shape so that the magnetic body 61 surrounds the electric cable when the noise reduction device 60 is attached to the electric cable. A rectangular cylindrical base portion formed on a top surface of one end portion of the portion 62a over a certain range and integrally connected to the other end portion of the band-like portion 62a. 62c. The support member 52 is made of, for example, plastic having elasticity to some extent.

  The support member 62 is a so-called cable tie-like member, and an open end (end portion on the side of the locking portion 62b) of the belt-like portion 62a can be inserted and passed through the inside of the tube of the base portion 62c. A locking portion (not shown) is provided inside the cylinder of the base portion 62c, and locks the locking portion 62b.

  The magnetic body 61 is disposed along the inner surface of the strip 62a. Magnetic bodies 61 a are provided on the left and right lower end surfaces of the base portion 62 c, and both end portions of the magnetic body 61 a are in contact with the side surface of the end portion of the magnetic body 61 and the side surface of the intermediate portion of the magnetic body 61. ing. The strip 62a is disposed along the outer surface of the magnetic body 61 so as to be in close contact therewith. Each locking portion 62b extends in the width direction of the belt-like portion 62a and is disposed at equal intervals in the longitudinal direction of the belt-like portion 62a.

  When attaching the noise reduction instrument 60 to the electric cable, the electric cable is arranged inside the band 62a with the open end of the band 62a not inserted into the tube of the base 62c. Thereafter, when the open end of the belt-like portion 62a is inserted into the cylinder of the base portion 62c and pulled, a ring through which the electric cable passes is formed by the belt-like portion 62a and the magnetic body 61 as shown in FIG.

  Since a plurality of the locking portions 62b are arranged in the longitudinal direction of the band-shaped portion 62a, the end portion of the band-shaped portion 62a is selected by selecting the locking portion 62b to be locked to a locking portion (not shown) in the base portion 62c. A plurality of locking positions can be selected, whereby the size of the ring formed by the belt-like portion 62a (and the magnetic body 61) can be adjusted.

  In the case of the present embodiment, when the end of the band-shaped portion 62a is pulled so as to tighten the electric cable, the engaging portion 62b becomes a non-illustrated engaging portion in the base 62c at a position corresponding to the cross-sectional shape of the electric cable. Will be locked. That is, the locking portion in the base portion 62c has a ratchet function, does not resist movement in one direction of the strip-shaped portion 62a, and does not resist movement in the reverse direction by locking the locking portion 62b. Resist this.

  Since the side surface of the magnetic body 61 is in contact with one end of the magnetic body 61a and is in contact with the other end of the magnetic body 61a at an intermediate position, the magnetic body 61 and the magnetic body 61a are annular. The magnetic body is formed. The sticking material 63 is disposed on the upper surface of the base portion 62c, and functions as an attachment portion for fixing the noise reduction device 60 attached to the electric cable to an attachment object. The noise reduction device 60 is an attachment object. It is stuck to the object by the sticking material 63.

  In this embodiment, since the magnetic body 61 has flexibility, it can be mounted without damaging the electric cable. Moreover, since it attaches to an electric cable by the latching | locking of the latching | locking part 62b and the latching | locking part in the base 62c, it can mount | wear to an electric cable easily. Furthermore, by providing a plurality of locking portions 62b and making it possible to adjust the size of the ring formed by the band-shaped portion 62a, it is possible to mount the cable on various diameters and cross-sectional shapes.

<Seventh embodiment>
FIG. 7 is an explanatory diagram of a noise reduction device 70 according to the seventh embodiment of the present invention. The noise reduction device 70 includes a magnetic body 71, a support member 72, and an adhesive material 73. The magnetic body 71 is a flexible belt-like body and can be created by a known method. For example, a magnetic powder is mixed into a resin to form a band, and the flexibility is adjusted depending on the type of resin and the mixing ratio of the magnetic powder. In the case of this embodiment, it is desirable that the resin is of a relatively flexible type such as silicone rubber.

  The support member 72 is a member for supporting the magnetic body in an annular shape so that the magnetic body 71 surrounds the electric cable when the noise reduction device 70 is attached to the electric cable. A square plate-like base 72c integrally connected to one end of the portion 72a, and a hill 72b integrally provided on the base 72c and provided with the other end of the magnetic body 71. Prepare. The support member 72 is made of, for example, a plastic having a certain degree of elasticity.

  The end surface of the other end portion 71a of the magnetic body 71 is disposed on the hill portion 72b so as to be substantially flush with the end surface of the hill portion 72b, and is formed on a part of the upper surface of the base portion 72c and the inner surface of the belt-like portion 72a. Are arranged along. The band-like portion 72a has an open end 72a ', is disposed along the outer surface of the magnetic body 71, and constitutes a substantially annular elastic portion in a natural state. The end portion 72a ′ of the belt-like portion 72a extends to the side of the end surface of the hill portion 72b, and the inner side surface of the end portion 71a of the magnetic body 71 disposed on the inner side is the end portion of the magnetic body 71 on the hill portion 72b. It is in contact with the end face.

  In attaching the noise reduction device 70 to the electric cable, the band 72a and the ends 72a 'and 71a of the magnetic body 71 are pinched and opened to the outside, and the electric cable is formed by the band 72a (and the magnetic body 71). Insert inside the ring. Thereafter, when the end portions 72a ′ and 71a are separated, the belt-like portion 72a elastically returns to the original form shown in FIG. 7, and the inner side surface of the end portion 71a of the magnetic body 71 is the end of the magnetic body 71 on the hill portion 72b. It touches the end face of the part. The adhesive material 73 functions as an attachment part for fixing the noise reduction device 70 attached to the electric cable to the attachment object, and the noise reduction device 70 is attached to the attachment object by the adhesive material 73. The

  In this embodiment, since the magnetic body 71 has flexibility, it can be mounted without damaging the electric cable. In addition, the belt-like portion 72a is formed in a substantially annular shape in a natural state, and can be easily attached to the electric cable because it is attached to the electric cable by pinching one end 72a 'and opening it outward. Furthermore, any wire cable can be attached as long as it has a shape and size that can be inserted into the ring formed by the belt-like portion 72a and the magnetic body 71.

<Eighth Embodiment>
In each of the above-described embodiments, the adhesive material is used as the attachment portion to the attachment object. However, the present invention is not limited to this, and attachment portions having other configurations can also be employed. FIGS. 8A and 8B are explanatory views of another example of the attachment portion. Here, the noise reduction instrument 40 of the fourth embodiment will be described as an example.

  The example of Fig.8 (a) has shown the example which provided the attaching part 431 in the lower surface of 42 d of bases. The attachment portion 431 is provided with a return wing by the tip of the shaft. When a hole is provided in the attachment object and the attachment portion 431 is inserted into the hole, the wing is bent and attached at the time of insertion. Although the portion 431 is inserted into the hole, the wings elastically return to their original shape when they pass through the hole and cannot be removed from the hole.

  The example of FIG. 8B is an example in which a base portion 42d 'having a hole 432 is used instead of the base portion 42d, and the hole 432 constitutes an attachment portion as an attachment hole through which the screw 433 passes. In this example, a screw hole is provided in the attachment object, and the noise reduction instrument 40 is fixed to the attachment object by inserting the screw 433 into the hole 432 and screwing into the screw hole.

(A) And (b) is explanatory drawing of the noise reduction instrument 10 which concerns on 1st Embodiment of this invention. (A) And (b) is explanatory drawing of the noise reduction instrument 20 which concerns on 2nd Embodiment of this invention. It is explanatory drawing of the noise reduction instrument 30 which concerns on 3rd Embodiment of this invention. (A) And (b) is explanatory drawing of the noise reduction instrument 40 which concerns on 4th Embodiment of this invention. (A) And (b) is explanatory drawing of the noise reduction instrument 50 which concerns on 5th Embodiment of this invention. It is explanatory drawing of the noise reduction instrument 60 which concerns on 6th Embodiment of this invention. It is explanatory drawing of the noise reduction instrument 70 which concerns on 7th Embodiment of this invention. (A) And (b) is explanatory drawing of the other example of an attaching part.

Explanation of symbols

10, 20, 30, 40, 50, 60, 40 Noise reduction instrument

Claims (3)

In a noise reduction device equipped with a magnetic body attached to an electric cable and arranged around the electric cable,
The magnetic body is a flexible band-shaped body,
A support member for supporting the magnetic body in an annular shape so that the magnetic body surrounds the electric cable when mounted on the electric cable;
The support member is
A flexible strip disposed along the outer surface of the magnetic body;
A locking portion for releasably locking the end of the belt-shaped portion;
A hill portion juxtaposed with the locking portion, and
At the time of locking by the locking portion, the band-shaped portion has a substantially annular shape,
The magnetic body has one end portion on the end side of the belt-shaped portion and the other end portion disposed on the hill portion,
The other end portion of the magnetic body is disposed on the hill portion so that an end surface thereof is in contact with an inner surface of the one end portion of the magnetic body when the electric wire cable is mounted. Noise reduction instrument. In a noise reduction device equipped with a magnetic body attached to an electric cable and arranged around the electric cable,
The magnetic body is a flexible band-shaped body,
A support member for supporting the magnetic body in an annular shape so that the magnetic body surrounds the electric cable when mounted on the electric cable;
The support member is
A flexible strip disposed along the outer surface of the magnetic body;
Connected to the other end of the band-shaped part, having a cylindrical shape into which one end of the band-shaped part is inserted, and having a locking part in which the one end of the band-shaped part is releasably locked A cylindrical base,
Wherein provided on the lower end surface of the left and right sides of the base portion, the side surface of the magnetic substance in the other end portion of the belt portion, the magnetic body at the site of the middle of one end side of the strip portion that is inserted into the base A magnetic body different from the magnetic body that contacts the side surface of
A noise reduction instrument characterized by comprising: The locking portion is
2. A plurality of locking positions at the end of the band-shaped part can be selected so that the size of the ring formed by the band-shaped part can be adjusted when locked by the locking part. Or the noise reduction instrument of 2.

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