JP2008288276A - Noise absorbing member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a noise absorbing member for reliably preventing a wire from being held by coupling portions of divided ferrite cores. <P>SOLUTION: The noise absorbing member is characterized in including ferrite cores 1, 2, a plurality of cases 3, 4 for storing each divided cores 1, 2, a coupling portion 6 for coupling the cases 3, 4 to be opened and closed, and holding state protecting members 9 arranged at the front surfaces 1a, 1b, 2a and 2b in the side of wire inserting holes 1a, 2a of the cases 3, 4 and the divided cores 1, 2 in order to hold the coupling portion 6 at the opening position and to cover the entire part in the wire inserting direction. In particular, the holding state protecting member 9 prevents the wire from being held in a space S that is formed with the cases 3, 4 and the divided cores 1, 2 opposed each other in both sides of the coupling portion 6, while the cases 3, 4 move to the closed position from the opened position. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a noise absorbing member having a split ferrite core, and more particularly, to a noise absorbing member having a pinching prevention member that prevents pinching of wiring at a connecting portion of the split ferrite core.

2. Description of the Related Art Conventionally, in order to absorb noise such as unnecessary electromagnetic waves of an electronic device, a noise absorbing member is provided in wiring such as a power cable and a signal cable. As a noise absorbing member attached to and detached from the wiring, a member having a pair of semi-cylindrical divided ferrite cores and a pair of storage cases that cover the outer peripheral surface of the divided ferrite cores and are connected by hinge-like connecting portions. Widely used. In this type of noise absorbing member, the divided ferrite cores are joined to each other in a cylindrical shape with the wiring interposed therebetween, so that the outer peripheral surface of the wiring is surrounded and fixed by the inner peripheral surface of the cylindrical divided ferrite core. Do (clamp).
When the noise absorbing member is attached to the wiring, the wiring may be sandwiched not at the center of the divided ferrite core but at the connecting portion, and the cable may be damaged or the mounting operation may be repeated. In particular, when one or a plurality of small-diameter cables are bundled, there is a problem that the small-diameter cables are easily sandwiched between the joint surfaces of the divided ferrite cores.
In the noise absorbing member having the divided ferrite core, for example, techniques described in Patent Documents 1 to 4 below are known as techniques for preventing a cable from being sandwiched at a connecting portion.

In Patent Document 1 (Japanese Patent Application Laid-Open No. 06-215952), a split core case (1, 2) formed with a ferrite core (3, 4) and formed in a semi-annular shape is connected to a hinge (5 ) And a core case for EMC (Electro Magnetic Compatibility) in which the other end can be detachably locked. Further, in Patent Document 1, projecting portions (1a to 1d, 2a to 2d) projecting from the joining end surfaces of the split core cases (1, 2) are provided in a closed state so as not to interfere with each other in the facing direction. The technique which prevents that a harness (9) is guided by the said protrusion part (1a-1d, 2a-2d) and is pinched | interposed between the said joining end surfaces by this is described.
Patent Document 2 (Japanese Patent Application Laid-Open No. 06-089815) discloses an insertion recess (2a, 2b) through which a cable (11) is inserted and a split magnetic body (1a, 1b) having a joint surface (3), and the insertion recess. A split case (4a, 4b) having an insertion hole (5a, 5b) and a joint (7) corresponding to (2a, 2b) and accommodating the split magnetic body (1a, 1b); and the split case ( 4A, 4b) describes a technique for a noise absorber provided with a protruding portion (13) protruding so as to prevent movement of the inserted cable (11) on at least one side surface.

Patent Document 3 (Act No. 3045426) includes a soft magnetic body (2) having a shape surrounding the cable (10) and a two-folded storage case (1) covering the soft magnetic body (2). The protrusions (holding portions 5 and 6) provided at the ends of the storage case (1) in the extending direction of the cable (10) protrude in the tangential direction from the ends of the semicircular cable insertion grooves (8). A technique for preventing the cable (10) from being pinched by the connecting portion of the soft magnetic body (2) when the storage case (1) divided into two parts is united is described.
In Patent Document 4 (Japanese Patent Laid-Open No. 11-097875), for a pair of semi-cylindrical ferrites (1A, 1B), the split surface (11), which is a joint between the ferrites (1A, 1B), and the above When attaching the ferrite (1A, 1B) to the cable (5) by providing a chamfered portion (13) formed as a gently curved surface at the connection portion with the inner peripheral surface of the ferrite (1A, 1B), The cable (5) is pushed by the V-shaped groove formed by facing the chamfered portions (13) so as to push the sandwiched cable (5) inward (inner peripheral surface direction), that is, the so-called wedge action. A technique for preventing pinching between the split surfaces (11) is described.

Japanese Patent Laid-Open No. 06-215952 ("0008" to "0012", FIGS. 1 to 4) Japanese Patent Laid-Open No. 06-089815 ("0010" to "0014", FIGS. 1 to 3) Noto 3045426 (“0008”, “0009”, FIGS. 1 to 6) Japanese Patent Laid-Open No. 11-097875 (“0008” to “0014”, FIGS. 1 to 5)

(Problems of conventional technology)
For the wiring to which the noise absorbing member is attached, there is a case where wiring that is not straight and hard material, for example, wiring in which several thin-diameter wires are bundled is used. In this case, since the electric wire is thin and soft, it does not become a straight state but easily becomes a waved state (waved state) in the extension direction of the wiring.
Therefore, when the noise absorbing member is attached to the wavy wiring, in the techniques described in Patent Documents 1 to 3, both ends of the storage case are joined to the joint portions of the divided ferrite cores by the protrusions at both ends of the storage case. Although it can be controlled so as not to enter, a part of the wavy wiring easily enters the coupling portion inside the storage case where the protrusion is not provided. For this reason, there is a problem that it becomes easy to sandwich a part of the wavy wiring that has entered the joint part at the joint part.

  Similarly, in the technique described in Patent Document 4, when a wire in which several thin-diameter wires are bundled is used as the cable (5), the wavy cable (5) is connected to the chamfered portion. It becomes easy to enter the dividing surface (11) outside (13). For this reason, part of the wiring that has entered the dividing surface (11) cannot be pushed inward (in the inner peripheral surface direction) due to the wedge action by the V-shaped groove formed by the chamfered portion (13). There is a problem that the cable (5) is likely to be caught between the dividing surfaces (11). Further, since the halogen-free electric wire has a thin coating, the halogen-free electric wire is weak in wear resistance and has a problem that it is rubbed and damaged by the hinge of the core case when the ferrite core is mounted.

In view of the above circumstances, the present invention has the following description (O01) as a technical problem.
(O01) To prevent the wiring from being pinched at the connecting portion of the split ferrite core.

In order to solve the technical problem, the noise absorbing member according to claim 1 is:
A ferrite core that has a plurality of split cores, and when the split cores are assembled, a wire through-hole through which the electric wire penetrates is formed and absorbs noise generated from the penetrating electric wire,
A plurality of cases for accommodating the divided cores;
An open position where the split cores are separated to form an opening through which the electric wire can be introduced, and a closed position where the split core is assembled into a ferrite core so that the opening is closed and the wire through hole is formed And a connecting portion for connecting the plurality of cases so as to be openable and closable along a rotation center extending in the wire penetration direction, between the positions,
A pinching prevention member that is disposed on the surface of the case and the split core on the side of the wire through hole and that covers the entire region in the wire penetrating direction with the connecting portion sandwiched in the open position, and the case is disposed from the open position. The pinching prevention member for preventing the electric wire from being pinched in the space formed by the case and the split core that face each other across the connecting portion as it moves to the closed position;
It is provided with.

The invention according to claim 2 is the noise absorbing member according to claim 1,
A frame mounting member to be mounted on a frame of an electronic device having the electric wire;
It is provided with.

The invention according to claim 3 is the noise absorbing member according to claim 1 or 2,
A pinching prevention member housing case for housing the pinching prevention member;
It is provided with.

The invention according to claim 4 is the noise absorbing member according to claim 3,
The entrapment prevention member accommodation case having a groove formed on the outer surface of the case and an accommodation cover covering the outside of the groove;
It is provided with.

The invention according to claim 5 is the noise absorbing member according to claim 3,
The pinching prevention member configured as a strip-shaped film member,
The pinching prevention member accommodation case which has a rotating shaft which supports one end of the film member, and which acts the force which winds up the film member on the rotating shaft;
A film member locking portion that locks the other end of the film member against the force of winding the film member,
It is provided with.

The invention according to claim 6 is the noise absorbing member according to any one of claims 1 to 5,
The pinching prevention member applied with a stickable / peelable adhesive on the surface of the case and the split core on the side of the wire through hole,
It is provided with.

The invention according to claim 7 is the noise absorbing member according to any one of claims 1 to 6,
The case having an insertion port formed on an end surface in the electric wire penetration direction, in which the divided core is inserted in the electric wire penetration direction, and an insertion port cover for opening and closing the insertion port,
It is provided with.

According to invention of Claim 1, it can prevent reliably that the said electric wire is pinched by the said space by the said pinching prevention member.
According to the second aspect of the present invention, the noise absorbing member can be fixed to the frame by the frame mounting member.
According to invention of Claim 3, the said pinching prevention member can be accommodated by the said pinching prevention member accommodation case, and the said pinching prevention member can be reused.
According to the invention described in claim 4, it is possible to prevent the pinching prevention member from falling off or being lost by the housing cover that covers the outside of the groove portion in which the pinching prevention member is housed.

  According to the invention described in claim 5, by locking the other end portion of the film member with the film member locking portion, the pinching prevention member is moved to the case and the split core at the open position. It can hold | maintain in the state arrange | positioned on the surface by the side of an electric wire through-hole. According to the invention described in claim 5, when the other end portion of the film member is removed from the film member locking portion, the film member is wound around the rotating shaft of the pinching prevention member accommodation case. . For this reason, after the case is moved from the open position to the closed position and the electric wire is prevented from being caught in the space, the pinching prevention member is not left in the wire through hole. it can. As a result, the pinching prevention member can prevent the noise absorption characteristics of the ferrite core from being affected.

According to the invention described in claim 6, the pinching prevention member is held in a state where it is disposed on the surface of the case and the split core on the side of the wire through-hole in the open position by being attached with the adhesive. it can. According to the invention described in claim 6, the adhesive can be peeled after the case is prevented from being moved from the open position to the closed position and being caught in the space. The pinching prevention member can be prevented from remaining in the wire through hole. As a result, it is possible to prevent the noise absorption characteristics of the ferrite core from being affected by the pinching prevention member.
According to invention of Claim 7, the said division | segmentation core can be accommodated in the said case by inserting along the electric wire penetration direction from the said open insertion port. Therefore, for example, even when the pinching prevention member is arranged in advance on the wire through hole side of the case at the open position, the split core can be accommodated in the case from the insertion port.

Next, specific examples of embodiments of the present invention (hereinafter referred to as examples) will be described with reference to the drawings, but the present invention is not limited to the following examples.
In order to facilitate understanding of the following description, in the drawings, the front-rear direction is the X-axis direction, the left-right direction is the Y-axis direction, the up-down direction is the Z-axis direction, and arrows X, -X, Y, -Y, The direction indicated by Z and -Z or the indicated side is defined as front, rear, right, left, upper, lower, or front, rear, right, left, upper, and lower, respectively.
In the figure, “•” in “○” means an arrow heading from the back of the page to the front, and “×” in “○” is the front of the page. It means an arrow pointing from the back to the back.
In the following description using the drawings, illustrations other than members necessary for the description are omitted as appropriate for easy understanding.

FIG. 1 is a perspective explanatory view of a power cable equipped with a noise absorbing member according to Embodiment 1 of the present invention.
FIG. 2 is an explanatory view of a noise absorbing member in a state in which the joining portion of the split ferrite core case is covered with an anti-pinch film, FIG. 2A is an enlarged explanatory view of a front end portion of the noise absorbing member, and FIG. 2B is a noise absorbing member FIG. 2C is an overall explanatory view of a split ferrite core case of a noise absorbing member, and FIG. 2D is a sectional explanatory view of a film storage case of the noise absorbing member.
In FIG. 1, a cable C extending in the front-rear direction (X-axis direction) has a cylindrical noise absorbing member for absorbing noise such as unnecessary electromagnetic waves in an electronic device (for example, an image forming apparatus such as a printer or a FAX). U is attached.

1 and 2A to 2C, the noise absorbing member U includes a pair of semi-cylindrical divided ferrite cores (divided cores) 1 and 2. The split ferrite cores 1 and 2 are semicircular cable penetration surfaces 1a and 2a through which the cable (electric wire) C passes, and a rectangular shape to be joined when the split ferrite cores 1 and 2 are joined in a cylindrical shape. It has opening side joining surfaces 1b and 2b and connecting side joining surfaces 1c and 2c.
The divided ferrite cores 1 and 2 constitute a ferrite core (1 + 2). In addition, by joining (assembling) the opening-side joining surfaces 1b and 2b and the coupling-side joining surfaces 1c and 2c of the split ferrite cores 1 and 2, an arc-shaped wire through-hole through which the cable (C) penetrates (1a + 2a) is formed.

  The noise absorbing member U has a pair of divided ferrite core cases (cases) 3 and 4 covering the outer peripheral surfaces of the divided ferrite cores 1 and 2. The split ferrite core cases 3 and 4 are formed on the cable through surfaces 1a and 2a of the split ferrite cores 1 and 2 on both end faces (+ X end face and -X end face) in the extension direction (X-axis direction) of the cable C. Cable penetrating portions 3a and 4a are formed in a range corresponding to the extending direction, and a range corresponding to the cable extending direction of the opening side joint surfaces 1b and 2b and the connecting side joint surfaces 1c and 2c of the divided ferrite cores 1 and 2. Opening side joints 3b and 4b and connection side joints 3c and 4c are formed. In FIG. 2A, an opening K is formed between the opening-side bonding surfaces 1b and 2b and the opening-side bonding portions 3b and 4b. Further, a gap (space) S having a V-shaped cross section is formed between the connection side bonding surfaces 1c and 2c and the connection side bonding portions 3c and 4c.

The semi-cylindrical split ferrite core cases 3 and 4 are connected to each other via hinges (connecting portions) 6 at one end in the circumferential direction. The hinge 6 allows the split ferrite cores 1 and 2 and the split ferrite core cases 3 and 4 to be connected. The ferrite core cases 3 and 4 are configured to be openable and closable. In addition, a projection 7 having a claw portion 7a provided on the divided ferrite core case 3 side and projecting in the tangential direction is provided at the other circumferential end of the divided ferrite core cases 3 and 4, and the divided ferrite core A square frame type claw fixing portion 8 provided on the case 4 side and engaged with the claw portion 7a is formed.
Further, on the inner side of the divided ferrite cores 1 and 2 and the divided ferrite core cases 3 and 4, a band-shaped anti-pinch film (pinch prevention) covering the connection side bonding surfaces 1 c and 2 c and the connection side bonding portions 3 c and 4 c. Member) 9 is arranged. The anti-pinch film 9 has a film through hole 9a formed at the front end in the same direction as the cable extension direction, and the film through hole 9a is located at the rear side in the cable extension direction on the connecting side of the divided ferrite core case 4. The film is locked by a film locking portion (film member locking portion) 11 formed at the end (−X end).

The rear end of the anti-pinch film 9 in the film extension direction is stored in a film storage case (pinch prevention member storage case) 12 supported on the front end face (+ X end face) in the cable extension direction of the split ferrite core case 4. Yes. In Example 1, since the film storage case 12 is not supported by the divided ferrite core case 3, the divided ferrite core cases 3 and 4 can be opened to the state shown in FIGS. 2B and 2C.
2D, in the film storage case 12, a rotating shaft 12a on which the rear end of the pinching prevention film 9 is supported is rotatably supported. The rotating shaft 12a always receives a force (tension) that pulls the pinching prevention film 9 in a roll shape by an elastic spring (not shown). That is, in Example 1, in the state where the film through-hole 9a is locked to the film locking portion 11, as shown in FIG. 2B, the pinching prevention film opposes the force wound around the rotating shaft 12a. 9 is held in a state of covering the connection side bonding surfaces 1c and 2c and the connection side bonding portions 3c and 4c. When the film through-hole 9a is removed from the film locking portion 11, the pinching prevention film 9 is wound around the rotating shaft 12a.

1, 2 </ b> A, and 2 </ b> C, an L-shaped frame mounting member 13 is fixedly supported on the end surface on the connection side (hinge 6 side) of the film storage case 12. The frame mounting member 13 is formed in a so-called hook shape, the vertical plate 13a extending in the vertical direction from the outer end surface of the film storage case 12, and the film storage case 12 from the outer end of the vertical plate 13a. A parallel plate 13b extending in parallel with the outer end surface is integrally formed.
In FIG. 1, the frame mounting member 13 can be mounted, for example, in the mounting hole Fa of the frame F of the electronic device. In the frame F of the first embodiment, two plates F1 and F2 arranged in parallel and a support member F3 that supports the plates F1 and F2 are integrally formed. A gap Fb is formed between them.

  In Example 1, the vertical length of the vertical plate 13a, that is, the distance from the film storage case 12 to the parallel plate 13b is set in advance so as to be equal to or greater than the thickness of the plate F1. . Accordingly, the parallel plate 13b of the frame mounting member 13 is inserted through the insertion hole Fa, and then the parallel plate 13b in the gap Fa is slid in the surface direction of the plate F1, thereby absorbing the noise. The member U is attached to the frame F.

(Operation of Example 1)
FIG. 3 is a diagram for explaining the operation of the noise absorbing member of the first embodiment. FIG. 3A is a diagram illustrating a state in which a cable is inserted from the opening of the split ferrite core case into the cable penetration surface of the split ferrite core, and FIG. FIG. 3C is a diagram illustrating a state in which the split ferrite core case starts to be closed from the state of 3A, FIG. 3C is a diagram illustrating a state in which the split ferrite core case is completely closed from the state of FIG. 3B, and FIG. It is a figure which shows the state which wound up the pinching prevention film.
In the noise absorbing member U of Example 1 having the above-described configuration, as shown in FIG. 3A, the sandwiching prevention film 9 covers the connection side bonding surfaces 1c and 2c and the connection side bonding portions 3c and 4c. The cable C can be inserted from the opening K to the cable penetration surfaces 1a and 2a side of the divided ferrite cores 1 and 2. Therefore, in Example 1, the cable C is supported by the inner side surface of the anti-pinch film 9 when inserted on the cable penetration surface 1a, 2a side. Can be prevented from entering the gap S.

Further, as shown in FIG. 3B, when the divided ferrite core cases 3 and 4 are closed from the state of FIG. 3A, the opening K and the gap S become narrower. At this time, since the pinching prevention film 9 is in a state of covering the connection side joint surfaces 1c and 2c and the connection side joint portions 3c and 4c as a whole, the connection side joint surfaces 1c and 2c and the connection side joint portion are covered. The state which is not pinched | interposed into 3c and 4c can be hold | maintained. That is, it is possible to maintain the state where the pinching prevention film 9 covers the gap S without entering the gap S.
Then, as shown in FIG. 3C, in the state where the split ferrite core cases 3 and 4 are completely closed from the state of FIG. 3B and the opening K and the gap S are eliminated, the claw portion 7a of the protrusion 7 When the claw fixing portion 8 is engaged and fixed, the pinching prevention film 9 is surrounded by a space formed between the cable C and the cable penetration surfaces 1a and 2a and the cable penetration portions 3a and 4a. Is held in the state.

  Therefore, in the noise absorbing member U of Example 1, the cable C is supported on the inner surface of the pinching prevention film 9 that covers the gap S when the divided ferrite core cases 3 and 4 are closed. The cable C can be reliably prevented from entering the gap S outside the outer surface of the pinching prevention film 9, and can be reliably pinched between the connection side bonding surfaces 1c, 2c and the connection side bonding portions 3c, 4c. Can be prevented. As a result, damage such as damage and wear of the cable C due to pinching can be reliably prevented.

Further, as shown in FIG. 3D, when the film through hole 9a of the anti-pinch film 9 is removed from the film locking portion 11 (see FIG. 2C) from the state shown in FIG. 3C, the anti-pinch film 9 is stored in the film. The case 12 is wound around the rotating shaft 12a (see FIG. 2D). Therefore, in the noise absorbing member U of Example 1, after the split ferrite core cases 3 and 4 are closed, the pinch prevention film 9 is not left on the cable through surfaces 1a and 2a of the split ferrite cores 1 and 2. can do. As a result, the pinching prevention film 9 can prevent the noise absorption characteristics of the divided ferrite cores 1 and 2 from being affected.
In addition, the wound anti-pinch film 9 is hardly damaged in each state of FIGS. 3A to 3D, and can be reused even when the cable C is removed and then attached again. it can.

Furthermore, the noise absorbing member U of Example 1 can be mounted in the mounting hole Fa of the frame F of the electronic device by the hook-shaped frame mounting member 13 (see FIG. 1). For this reason, for example, when the electronic device is moved, it is possible to reduce the movement of the cable C or the noise absorbing member U and contact with the frame F or the like. As a result, the cable C and the noise absorbing member U can be prevented from being damaged or worn as compared with the case where the cable F is not fixed to the frame F. In addition, the wiring space can be reduced by arranging the mounting hole Fa of the frame F at an appropriate location and mounting the noise absorbing member U.
In Example 1, the pinching prevention film 9 is wound up after the divided ferrite core cases 3 and 4 are completely closed. However, the present invention is not limited to this. 9a can be removed from the film latching | locking part 11 (refer FIG. 2C), and the said pinching prevention film 9 can also be wound up.

FIG. 4 is an explanatory diagram of a noise absorbing member of Example 2 of the present invention, FIG. 4A is an explanatory diagram corresponding to FIG. 2A of Example 1, and FIG. 4B is an explanatory diagram corresponding to FIG.
Next, the noise absorbing member according to the second embodiment of the present invention will be described. In the description of the second embodiment, components corresponding to the components of the first embodiment are denoted by the same reference numerals, and details thereof are described. The detailed explanation is omitted. The second embodiment is different from the first embodiment in the following points, but is configured in the same manner as the first embodiment in other points.
In FIG. 4A, in the noise absorbing member U of Example 2 of the present invention, a film accommodating recess 3d for accommodating the pinching prevention film 16 of Example 2 is formed on the outer peripheral surface of the divided ferrite core case 3 ( (See the dashed line in FIG. 4A). A film storage cover (storage cover) 3e for opening and closing the film storage recess (groove) 3d is supported on the outside of the film storage recess 3d so as to be openable and closable around a rotation center 3f.
The film accommodation recess 3d and the film accommodation cover 3e constitute a pinching prevention member accommodation case (3d + 3e) of Example 2.

4B, the pinching prevention film 16 of Example 2 is different from Example 1 in that the front end face (+ X end face) in the cable extension direction of the split ferrite core cases 3 and 4, the cable penetration face 2a, and the It is affixed with the adhesive 16a apply | coated to the range (refer FIG. 4A) corresponding to the cable penetration part 4a. In Example 2, the pressure-sensitive adhesive 16a has the front end surface to which the anti-pinch film 16 is attached and the connection-side bonding surface 2c even when the anti-pinch film 16 is peeled off along the surface direction. The pressure-sensitive adhesive 16a does not remain in the connection-side joint 4c, and is set in advance so as to have a weak adhesive strength that does not stain each surface.
Further, in the second embodiment, the film locking portion 11 and the film storage case 12 of the first embodiment are omitted, and the frame mounting member 13 ′ of the second embodiment is a cable extension on the connection side of the divided ferrite core case 4. Fixed and supported in the center of the direction.

(Operation of Example 2)
In the noise absorbing member U of Example 2 having the above-described configuration, the pinching prevention film 16 is formed of the adhesive 16a with the front end surface (+ X end surface) in the cable extension direction of the divided ferrite core cases 3 and 4, and the cable penetration surface. 2a and the cable penetration part 4a (see FIGS. 4A and 4B). Therefore, the connection side bonding surfaces 1 c and 2 c and the connection side bonding portions 3 c and 4 c are covered with the pinching prevention film 16. In this state, when the cable C is inserted from the opening K to the cable penetrating surfaces 1a and 2a of the split ferrite cores 1 and 2, the cable C is prevented from entering the gap S by the pinching prevention film 16. Is done. Therefore, even when the divided ferrite core cases 3 and 4 are closed (see FIGS. 3A to 3C), the cable C can be reliably prevented from entering the gap S by the pinching prevention film 16, and the connection side joining It can be reliably prevented from being sandwiched between the surfaces 1c and 2c and the connecting side joints 3c and 4c. As a result, damage such as damage and wear of the cable C due to pinching can be reliably prevented.

  Further, in Example 2, the sandwiching prevention film 16 can be peeled off along the surface direction in a state where the divided ferrite core cases 3 and 4 are completely closed (see FIG. 3C). That is, the pinch prevention film 16 can be pulled out in the cable extension direction. Therefore, in the noise absorbing member U of Example 2, after the split ferrite core cases 3 and 4 are closed, the pinch prevention film 16 is not left on the cable through surfaces 1a and 2a of the split ferrite cores 1 and 2. can do. Further, the pinching prevention film 16 of Example 2 is removed without leaving the adhesive 16a on the attached front end surface, the connection side bonding surface 2c, and the connection side bonding portion 4c without staining each surface. be able to. As a result, it is possible to prevent the noise absorption characteristics of the divided ferrite cores 1 and 2 from being affected by the pinching prevention film 16 and the adhesive 16a.

Further, since the pulled-out anti-pinch film 16 is hardly damaged, it is mounted again after the cable C is removed by storing it in the film storing recess 3d (see FIG. 4A). Even if it can be reused.
In addition, the noise absorbing member U of the second embodiment has the same effects as the noise absorbing member U of the first embodiment.
In Example 2, the pinching prevention film 16 is removed after the divided ferrite core cases 3 and 4 are completely closed. However, the present invention is not limited to this, and the pinching prevention film 16 is not limited thereto. Can also be removed.

FIG. 5 is an explanatory diagram of a noise absorbing member of Example 3 of the present invention, FIG. 5A is an explanatory diagram corresponding to FIG. 2A of Example 1, and FIG. 5B is an explanatory diagram corresponding to FIG. 5C is an explanatory diagram corresponding to FIG. 2C.
Next, the noise absorbing member according to the third embodiment of the present invention will be described. In the description of the third embodiment, components corresponding to the components of the first embodiment are denoted by the same reference numerals, and details thereof are described. The detailed explanation is omitted. The third embodiment is different from the first embodiment in the following points, but is configured in the same manner as the first embodiment in other points.

5A to 5C, in the noise absorbing member U according to the third embodiment of the present invention, unlike the first embodiment, the pinching prevention film 9 ′ is arranged in a state of being stretched outside the opening K. Yes. The pinching prevention film 9 'has a film through hole 9a' formed at the front end in the film extending direction perpendicular to the cable extending direction. The film through hole 9a 'is formed in the film locking portion 11' of the third embodiment. It is locked by. Unlike the first embodiment, the film locking portion 11 ′ of the third embodiment is fixedly supported at the central portion in the cable extension direction on the open side of the divided ferrite core case 4.
Further, the pinching prevention film 9 ′ is accommodated in the film storage case 12 ′ of Example 3 whose rear end in the film extending direction is disposed on the open side of the divided ferrite core case 3. The film storage case 12 'of the third embodiment supports the rear end in the film extension direction of the anti-pinch film 9' with the rotation shaft 12a '(see FIG. 5A), like the film storage case 12 of the first embodiment. . In the film storage case 12 ', a force for winding the pinching prevention film 9' around the rotating shaft 12a 'is always given by the tension of an elastic spring (not shown).

Also, unlike the first embodiment, the film storage case 12 'has both ends in the cable extension direction with the opening for pulling out the anti-pinch film 9' facing the opening K as shown in FIG. 5a. It is arranged over. That is, in Example 3, in the state where the film through-hole 9a ′ is locked to the film locking portion 11 ′, as shown in FIGS. 5A to 5C, it opposes the force taken up by the rotating shaft. The anti-pinch film 9 ′ is held in a state of being stretched outside the opening K. When the film through-hole 9a 'is removed from the film locking portion 11', the pinching prevention film 9 'is wound around the rotating shaft 12a'.
Further, in the third embodiment, as in the second embodiment, the frame mounting member 13 ′ is fixedly supported at the cable extension direction center portion on the connection side of the divided ferrite core case 4.

(Operation of Example 3)
FIG. 6 is a diagram for explaining the operation of the noise absorbing member of Example 3, and FIG. 6A is a diagram showing a state immediately before the cable is inserted from the opening of the split ferrite core case into the cable penetration surface of the split ferrite core, and FIG. FIG. 6C is a diagram showing a state where a cable is inserted from the opening of the split ferrite core case into the cable penetration surface of the split ferrite core case from the state of FIG. 6A, and FIG. 6C is a state immediately before completely closing the split ferrite core case from the state of FIG. FIG. 6D is a view showing a state where the anti-pinch film 9 is wound up, and FIG. 6D is a view showing a state where the divided ferrite core case is completely closed from the state shown in FIG. 6C.

In the noise absorbing member U of Example 3 having the above-described configuration, the anti-pinch film 9 ′ has the anti-pinch film 9 ′ when the film through-hole 9a ′ is locked to the film lock portion 11 ′. It is held in a state of being stretched outside the opening K. Therefore, before the cable C is attached, as shown in FIG. 6A, the split ferrite cores 1 and 2 and the split ferrite core including the gap S that is inside the opening K by the pinching prevention film 9 ′. The entire inside of the cases 3 and 4 is covered.
In FIG. 6B, when the cable C is inserted from the opening K to the cable penetration surfaces 1a and 2a side of the split ferrite cores 1 and 2 from the state shown in FIG. 6A, the anti-pinch film 9 ′ In a range where the cable C is pressed and contacted with the cable C, the cable C is pushed into the cable penetrating surfaces 1a and 2a while being in close contact with the cable C. At this time, the pinching prevention film 9 ′ accommodated in the film storage case 12 ′ may be sent out.

  When the split ferrite core cases 3 and 4 are closed from the state shown in FIG. 6B, and the film through-hole 9a ′ of the pinching prevention film 9 is removed from the film locking portion 11 ′ immediately before being completely closed as shown in FIG. 6C. The anti-pinch film 9 'is wound around the rotating shaft 12a' of the film storage case 12 '. At this time, since the opening K and the gap S are almost eliminated, the cable C is prevented from entering the gap S by the pinching prevention film 9 ′. Then, the claw fixing portion 8 is engaged with the claw portion 7a of the protrusion 7 from the state shown in FIG. 6C, and the divided ferrite core cases 3 and 4 shown in FIG. It can be attached to the cable C.

Therefore, in the noise absorbing member U of Example 3, when the split ferrite core cases 3 and 4 are closed, the cable C enters the gap S by the pinching prevention film 9 ′, and the connection-side joining surface 1c. , 2c and the connection side joints 3c, 4c can be reliably prevented, and damage such as damage and wear of the cable C due to the pinching can be reliably prevented. In addition, after the split ferrite core cases 3 and 4 are closed, it is possible not to leave the pinching prevention film 9 ′ inside the split ferrite cores 1 and 2. Furthermore, since the entanglement prevention film 9 'wound up is hardly damaged, it can be reused even when the cable C is removed and then attached again.
In addition, the noise absorbing member U of the third embodiment has the same effects as the noise absorbing member U of the first embodiment.

FIG. 7 is an explanatory diagram of a noise absorbing member according to a fourth embodiment of the present invention, and is an explanatory diagram of a main part immediately before housing a split ferrite core in a split ferrite core case.
Next, the noise absorbing member according to the fourth embodiment of the present invention will be described. In the description of the fourth embodiment, the same reference numerals are given to the components corresponding to the components of the second embodiment, and the details thereof will be described. The detailed explanation is omitted. The fourth embodiment is different from the second embodiment in the following points, but is configured in the same manner as the second embodiment in other points.
In FIG. 7, in the noise absorbing member U according to the fourth embodiment of the present invention, the divided ferrite core cases 3 and 4 have a U-plate-shaped divided ferrite core storage cover (insert port cover) 3g as the front end surface in the cable extension direction. , 4g are connected to the divided ferrite core cases 3, 4 through hinges 3h, 4h arranged at the center in the circumferential direction. That is, the divided ferrite core storage covers 3g and 4g are configured to be openable and closable with respect to the divided ferrite core cases 3 and 4 by the hinges 3h and 4h.

Further, at both ends in the circumferential direction of the divided ferrite core housing covers 3g, 4g, there are cover claw portions 3g1, 4g1 protruding toward the main body side of the divided ferrite core cases 3, 4. Further, at the front ends of the divided ferrite core cases 3 and 4 in the cable extension direction, square frame type cover claw fixing portions 3i and 4i that engage with the claw portions 3g1 and 4g1 at both ends in the circumferential direction are provided. Is formed.
Front cover retaining portions 3j and 4j are formed by the cover claw portions 3g1 and 4g1 and the cover claw fixing portions 3i and 4i.
Further, rear-side retaining portions 3k and 4k projecting inward from both ends in the circumferential direction are formed at the rear end portions in the cable extension direction of the divided ferrite core cases 3 and 4.
The front retaining portions 3j, 4j and the rear retaining portions 3k, 4k constitute the retaining portions (3j + 3k, 4j + 4k) of the divided ferrite core cases 3, 4.

Further, the ferrite cores 1 and 2 are formed with groove-shaped stoppers 1d and 2d that fit into the stoppers (3j + 3k, 4j + 4k) while being accommodated in the split ferrite core cases 3 and 4, respectively. ing.
In Example 4, before the ferrite core 2 is accommodated in the divided ferrite core case 4 main body, the band-shaped anti-pinch film 16 extending along the cable extension direction is inserted into the cable penetration on the rear end side in the cable extension direction. It is pasted and supported only in the portion 4a (see the thick line portion in FIG. 7).

(Operation of Example 4)
In the noise absorbing member U of Example 4 having the above-described configuration, when the ferrite core 2 is accommodated in the divided ferrite core case 4 main body, first, the divided ferrite core accommodating cover 4g is opened (see FIG. 7). Next, the ferrite core 2 is inserted into the divided ferrite core case 4 main body side from the divided ferrite core housing cover 4g side. That is, the ferrite core 2 is inserted in the direction of the arrow Ya along the cable extension direction. Then, the divided ferrite core storage cover 4g is closed, and the cover claw fixing portions 3i and 4i are engaged and fixed to the cover claw fixing portions 3g1 and 4g1.

Therefore, in the noise absorbing member U of Example 4, the pinching prevention film 16 is attached in advance, and the ferrite cores 1 and 2 are separated from the opening K side, that is, the arrow Yb direction, from the divided ferrite core case 3. 4, the ferrite cores 1 and 2 can be accommodated in the split ferrite core cases 3 and 4 from the direction of the arrow Ya.
Further, when the ferrite cores 1 and 2 are accommodated in the split ferrite core cases 3 and 4, the retaining portions 1 d and 2 d of the ferrite cores 1 and 2 and the split ferrite core cases 3 and 4 are disconnected. Stop portions (3j + 3k, 4j + 4k) are fitted. Therefore, in the noise absorbing member U of the fourth embodiment, the ferrite cores 1 and 2 can be prevented from falling off from the split ferrite core cases 3 and 4 toward the opening K.
In addition, the noise absorbing member U of the fourth embodiment has the same effects as the noise absorbing member U of the second embodiment.

FIG. 8 is an explanatory diagram of a noise absorbing member of Example 5 of the present invention, FIG. 8A is an explanatory diagram corresponding to FIG. 4A of Example 2, and FIG. 8B is an explanatory diagram corresponding to FIG.
Next, the noise absorbing member of the fifth embodiment of the present invention will be described. In the description of the fifth embodiment, the same reference numerals are given to the components corresponding to the components of the second embodiment, and the details thereof will be described. The detailed explanation is omitted. The fifth embodiment is different from the second embodiment in the following points, but is configured in the same manner as the second embodiment in other points.
7A and 7B, in the noise absorbing member U of the fifth embodiment of the present invention, the film housing recess 3d, the film housing cover 3e, and the rotation center 3f of the second embodiment are omitted.
Further, unlike the second embodiment, the pinching prevention film 16 ′ of the fifth embodiment is not coated with the adhesive 16a unlike the pinching prevention film 16 of the second embodiment, and the user grips the front in the cable extension direction. A gripping portion 16a 'is formed.

(Operation of Example 5)
In the noise absorbing member U of the fifth embodiment having the above-described configuration, unlike the second embodiment, the gripping portion 16a ′ of the anti-pinch film 16 ′ is held by the user, and the anti-pinch film 16 ′ is so-called, It is used like a shoe spatula. First, with the gripping portion 16 a ′ gripped, a band-shaped pinching prevention film 16 ′ body extending along the cable extension direction is inserted inside the split ferrite cores 1, 2 and the split ferrite core cases 3, 4. The gap S, the connection side joint surfaces 1c and 2c and the connection side joints 3c and 4c are held in a covered state. At this time, the pinching prevention film 16 ′ is in a state where the gripping portion 16 a ′ extends in front of the front end face of the divided ferrite core case 3 (see FIGS. 8A and 8B). Next, in this state, the cable C is inserted from the opening K side to the cable penetrating surfaces 1a and 2a side, and the divided ferrite core cases 3 and 4 are closed. Then, after the divided ferrite core cases 3 and 4 are completely closed, the anti-pinch film 16 'is removed by pulling out the main body of the anti-pinch film 16' in the cable extending direction.

Therefore, in the noise absorbing member U of Example 5, by using the pinching prevention film 16 ′ like a shoe spatula, it is possible to achieve the same operational effects as the noise absorbing member U of Example 2, and efficiently. The noise absorbing member U can be attached to the cable C. Furthermore, the anti-pinch film 16 'has a simple structure and can be easily produced.
In Example 5, with respect to the pinched prevention film 16 'drawn out, it is assumed that the film accommodating recess 3d of Example 2 is not provided and is disposable after being used once. Since it is hardly damaged, it can be reused.
In Example 5, the pinching prevention film 16 'is removed after the divided ferrite core cases 3 and 4 are completely closed. However, the present invention is not limited to this, and the pinching prevention film is not limited thereto. 16 'can also be removed.

(Example of change)
As mentioned above, although the Example of this invention was explained in full detail, this invention is not limited to the said Example, A various change is performed within the range of the summary of this invention described in the claim. It is possible. Modification examples (H01) to (H07) of the present invention are exemplified below.
(H01) In the embodiment, the cable C is a single large-diameter cable. However, the present invention is not limited to this. For example, the present invention can be applied to a case where a plurality of small-diameter cables are bundled. . Further, for example, the small-diameter cable is looped at the position where the noise absorbing member U is mounted, and the two or more small-diameter cables are passed through the cable penetration surfaces 1a and 2a and the cable penetration portions 3a and 4a. The present invention can also be applied to the case of (pinch).

(H02) In the split ferrite core cases 3 and 4 of the second embodiment, the positions, sizes, and ranges of the film housing recess 3d and the film housing cover 3e can be arbitrarily changed. Further, the opening / closing direction and the like by the rotation center 3f can be arbitrarily changed.
(H03) The anti-pinch films 9, 9 ', 16, 16' of the above embodiment have a smooth surface in order to reduce damages such as wear on the cable C and the ferrite cores 1, 2 etc. during use. Although a high degree and a sufficiently thin one are desirable, it can be produced with any material, smoothness, thickness, strength, and the like.

(H04) In the film storage cases 12 and 12 'of the embodiment, when the film through holes 9a and 9a' are removed from the film locking portions 11 and 11 ', the anti-pinch films 9 and 9' are rotated. Although it is set to be automatically wound around the shafts 12a and 12a ', the present invention is not limited to this. For example, the rotating shafts 12a and 12a' can be manually rotated and wound. It is.
(H05) In the fourth embodiment, the retaining portions (3j + 3k, 4j + 4k) and the fitted retaining portions 1d, 2d to be fitted are not limited to this configuration, and any position, size, and range Can be configured. For example, the retaining portion can be formed in a hook shape along the cable extension direction or in a rail shape.
(H06) In the above-described embodiment, the film storage cover 3e and the divided ferrite core storage covers 3g and 4g are connected to the divided ferrite core cases 3 and 4, respectively. You can also

(H07) In the embodiment, the frame mounting members 13 and 13 'are fixedly supported on the connecting side of the divided ferrite core cases 3 and 4. However, the present invention is not limited to this, and the frame mounting members 13 and 13 are not limited thereto. The position of ′ is arbitrary as long as it does not become an obstacle when the anti-pinch films 9, 9 ′, 16, 16 ′ cover the connection side joint surfaces 1c, 2c and the connection side joints 3c, 4c. It can be changed. The frame mounting members 13 and 13 'are not limited to L-shaped hooks. For example, when a screw hole is provided in the frame F, the frame mounting member is configured by screws screwed into the screw holes. Then, the noise absorbing member U itself is rotated and the frame mounting member is screwed and mounted in the screw hole, and the cable C can be attached to the noise absorbing member U mounted on the frame F. is there. Further, the frame mounting member is formed in a plate shape having a through hole, and is screwed with a screw that passes through the through hole and is screwed into a screw hole of the frame F. It is also possible to mount the member U.

FIG. 1 is a perspective explanatory view of a power cable equipped with a noise absorbing member according to Embodiment 1 of the present invention. FIG. 2 is an explanatory view of the noise absorbing member in a state in which the joining portion of the split ferrite core case is covered with an anti-pinch film, FIG. 2A is an enlarged explanatory view of the rear end portion of the noise absorbing member, and FIG. 2C is an enlarged explanatory view of the inside of the member, FIG. 2C is an overall explanatory view of a divided ferrite core case of the noise absorbing member, and FIG. 2D is a cross-sectional explanatory view of a film storage case of the noise absorbing member. FIG. 3 is a diagram for explaining the operation of the noise absorbing member of the first embodiment. FIG. 3A is a diagram illustrating a state in which a cable is inserted from the opening of the split ferrite core case into the cable penetration surface of the split ferrite core, and FIG. FIG. 3C is a diagram illustrating a state in which the split ferrite core case starts to be closed from the state of 3A, FIG. 3C is a diagram illustrating a state in which the split ferrite core case is completely closed from the state of FIG. 3B, and FIG. It is a figure which shows the state which wound up the prevention film from pinching. FIG. 4 is an explanatory diagram of a noise absorbing member of Example 2 of the present invention, FIG. 4A is an explanatory diagram corresponding to FIG. 2A of Example 1, and FIG. 4B is an explanatory diagram corresponding to FIG. FIG. 5 is an explanatory diagram of a noise absorbing member of Example 3 of the present invention, FIG. 5A is an explanatory diagram corresponding to FIG. 2A of Example 1, and FIG. 5B is an explanatory diagram corresponding to FIG. 5C is an explanatory diagram corresponding to FIG. 2C. FIG. 6 is a diagram for explaining the operation of the noise absorbing member of Example 3, and FIG. 6A is a diagram showing a state immediately before the cable is inserted from the opening of the split ferrite core case into the cable penetration surface of the split ferrite core, and FIG. FIG. 6C is a diagram showing a state where a cable is inserted from the opening of the split ferrite core case into the cable penetration surface of the split ferrite core case from the state of FIG. 6A, and FIG. 6C is a state immediately before completely closing the split ferrite core case from the state of FIG. FIG. 6D is a view showing a state where the anti-pinch film 9 is wound up, and FIG. 6D is a view showing a state where the divided ferrite core case is completely closed from the state shown in FIG. 6C. FIG. 7 is an explanatory diagram of a noise absorbing member according to a fourth embodiment of the present invention, and is an explanatory diagram of a main part immediately before housing a split ferrite core in a split ferrite core case. FIG. 8 is an explanatory diagram of a noise absorbing member of Example 5 of the present invention, FIG. 8A is an explanatory diagram corresponding to FIG. 4A of Example 2, and FIG. 8B is an explanatory diagram corresponding to FIG.

Explanation of symbols

1, 2, ... split core,
1 + 2 ... Ferrite core,
1a + 2a: Wire through hole,
1a + 1b + 1c, 2a + 2b + 2c ... the surface on the wire through hole side,
3, 4 ... Case,
3d ... groove,
3e ... the housing cover,
3d + 3e, 12, 12 ′..
3g, 4g ... Insert cover,
6 ... connecting part,
9, 9 ', 16, 16' ... Anti-pinch member,
11, 11 '... film member locking part,
12a, 12a '... rotating shaft,
13, 13 '... frame mounting member,
16a ... adhesive,
C: Electric wire,
F ... Frame,
K ... Opening,
S ... space,
U: Noise absorbing member.

Claims (7)

A ferrite core that has a plurality of split cores, and when the split cores are assembled, a wire through-hole through which the electric wire penetrates is formed and absorbs noise generated from the penetrating electric wire,
A plurality of cases for accommodating the divided cores;
An open position where the split cores are separated to form an opening through which the electric wire can be introduced, and a closed position where the split core is assembled into a ferrite core so that the opening is closed and the wire through hole is formed And a connecting portion for connecting the plurality of cases so as to be openable and closable along a rotation center extending in the wire penetration direction, between the positions,
A pinching prevention member that is disposed on the surface of the case and the split core on the side of the wire through hole and that covers the entire region in the wire penetrating direction with the connecting portion sandwiched in the open position, and the case is disposed from the open position. The pinching prevention member for preventing the electric wire from being pinched in the space formed by the case and the split core that face each other across the connecting portion as it moves to the closed position;
A noise absorbing member comprising: A frame mounting member to be mounted on a frame of an electronic device having the electric wire;
The noise absorbing member according to claim 1, further comprising: A pinching prevention member housing case for housing the pinching prevention member;
The noise absorbing member according to claim 1, further comprising: The entrapment prevention member accommodation case having a groove formed on the outer surface of the case and an accommodation cover covering the outside of the groove;
The noise absorbing member according to claim 3, further comprising: The pinching prevention member configured as a strip-shaped film member,
The pinching prevention member accommodation case which has a rotating shaft which supports one end of the film member, and which acts the force which winds up the film member on the rotating shaft;
A film member locking portion that locks the other end of the film member against the force of winding the film member,
The noise absorbing member according to claim 3, further comprising: The pinching prevention member applied with a stickable / peelable adhesive on the surface of the case and the split core on the side of the wire through hole,
The noise absorbing member according to any one of claims 1 to 5, further comprising: The case having an insertion port formed on an end surface in the electric wire penetration direction, in which the divided core is inserted in the electric wire penetration direction, and an insertion port cover for opening and closing the insertion port,
The noise absorbing member according to any one of claims 1 to 6, further comprising:

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