JP3003960B2 - Noise current absorber - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art As a technique for absorbing a noise current flowing through an electric wire, it has been conventionally known that a magnetic material, for example, a ferrite is externally fitted around the electric wire, and the ferrite absorbs a noise current flowing through the electric wire. For example, a holding case in which a ferrite formed into a shape surrounding the outer periphery of the electric wire and divided into two along a hole through which the electric wire is inserted, and two case parts for housing the ferrite are connected by a hinge. A noise current absorber is known which is attached to an electric wire by closing the holding case so that the electric wire is sandwiched between a pair of ferrites.

[0003] In such a noise current absorbing device, a leaf spring that urges the divided surface of the ferrite so as to be pressed when the holding case is closed is attached to the case portion. When such a noise current absorber is attached to an electric wire having substantially the same diameter as the inner diameter of the hole through which the electric wire is inserted, a pair of ferrites are crimped by the leaf spring, and frictional resistance is generated between the hole and the electric wire. As a result, the noise current absorber is firmly fixed to the wire.

[0004]

However, there are cases where it is desired to change the mounting position of the noise current absorber in order to more efficiently absorb the noise current. In such a case, the holding case of the noise current absorber must be opened, and the operation is extremely complicated.

[0005] In addition to the holding case, a leaf spring for crimping the divided surface of the ferrite is required, so that there is a problem that the number of parts is large. SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a noise current absorber having a small number of components and capable of easily changing a mounting position.

[0006]

In order to achieve the above object, an invention according to claim 1 is formed into a shape surrounding an outer peripheral portion of an electric wire of an electronic device, and is divided into two along a hole through which the electric wire is inserted. A magnetic material, and a case portion for accommodating each of the magnetic materials. The case portion includes a holding case formed to be openable and closable. In the noise current absorbing device for absorbing a noise current, the holding case is formed so as to be able to selectively protrude to either one of the inside and the outside of the case, and when protruded inside, the divided surface of the magnetic body is formed. A spring portion for crimping, and the protrusion protruded inside the holding case.
Engage with the spring portion to prevent the spring portion from protruding outward.
A gist is provided for the noise current absorbing device, wherein the projecting portion for stopping is provided.

According to a second aspect of the present invention, the magnetic body is formed into a shape surrounding the outer periphery of the electric wire of the electronic device, and is divided into two along the hole through which the electric wire is inserted, and the magnetic body is housed. A holding case having a case portion, the case portion being formed to be openable and closable, wherein the divided surface of the magnetic body is crimped to absorb a noise current flowing through the electric wire; The case has one end connected to the case, and the other end swingably provided with a leaf spring portion, and the leaf spring portion compresses the divided surface of the magnetic body with the leaf spring portion. A noise current absorber is characterized in that an engagement portion is provided to engage with the other end of the leaf spring portion so as to protrude inward.

[0008]

According to the first aspect of the present invention, when the spring portion protrudes outside the holding case, the crimping of the split surface of the magnetic body by the spring portion is released, and the spring portion protrudes inside the holding case. Then, the divided surface of the magnetic body is pressed by the spring portion. Furthermore, the spring part protrudes inside the case.
When it is projected, the protrusion provided on the holding case
By engaging with the spring part, the spring part is accidentally
To prevent it from sticking out.

According to the second aspect of the present invention, when the end of the leaf spring portion is detached from the support portion of the holding case, the compression of the divided surface of the magnetic body by the leaf spring portion is released, and When the end is engaged with the engaging portion of the holding case and the leaf spring is protruded inside the holding case, the split surface of the magnetic body is pressed by the leaf spring.

[0010]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing the configuration of the noise current absorber according to the first embodiment of the present invention. FIG. 2 is a front view showing the outer surface of the holding case shown in FIG. FIG. 3 is a sectional view taken along line AA shown in FIG. Next, the configuration of the noise current absorber will be described with reference to FIGS.

As shown in FIG. 1, the noise current absorbing device 1 comprises:
It comprises a holding case 2 and ferrites 3a and 3b housed in the holding case 2. The holding case 2 includes two case parts 5 and 6 connected via a hinge 4. As shown in FIG. 2, a spring portion 8 that can selectively protrude to either the inside or the outside of the case portion 5 is provided at the center of the bottom portion 7 of the case portion 5 integrally with the case portion 5. Can be

The spring portion 8 is stable when it protrudes outward as shown by a solid line in FIG. 3 or when it protrudes inward as shown by a broken line, and this state is maintained unless a force is applied from the outside. Is done. As will be described later, when the spring portion 8 is protruded inward, the case portions 5, 6
Divided surfaces 3 of ferrites 3a, 3b respectively stored in
1 are pressed against each other.

An engagement claw 9 loosely engaged with an engagement groove 32 provided on the side surface of the ferrites 3a, 3b so that the ferrites 3a, 3b can be loosely fitted in the two case portions 5, 6 of the holding case 2. Is provided. A locking claw 10 and a locking holder 11 are provided on the front surface of the case 5, and the locking holder 11 is provided on the case 6 when the holding case 2 is closed.
And a locking hook 12 that is inserted into the locking hook and locked with the locking claw 10 is provided.

Further, the case 5 is provided with a semicircular cutout 13 through which electric wires of electronic equipment and the like pass.
Is also provided with a similar notch 14. Ferrite 3a,
3b is provided on its upper surface with a groove 33 having a semicircular cross section for passing an electric wire, and on its side surface is provided with an engaging groove 32.
The divided surfaces 31 of the ferrites 3a and 3b are surfaces on which the ferrites 3a and 3b housed in the case portions 5 and 6 are pressed against each other.

FIGS. 4 to 7 are explanatory diagrams of the operation of the noise current absorbing device of the present embodiment. Next, the operation of the noise current absorber will be described with reference to FIGS. As shown in FIG. 4, when the spring portion 8 protrudes outside the case portion 5, the ferrites 3a and 3b stored in the case portions 5 and 6 move into the holding case 2 as shown in FIG. Housed with play. Therefore, the divided surfaces 31 of the ferrite 3a and the ferrite 3b are not pressed against each other.

As shown in FIG. 6, the spring portion 8 is
When the ferrite 3a is protruded inward, the ferrite 3a stored in the case portion 5 is pressed against the ferrite 3b stored in the case portion 6 by the action of the spring portion 8, and the divided surface 31 of the ferrites 3a and 3b They are pressed together as shown in FIG.

When the spring portion 8 is protruded inward, any force is applied from the outside to prevent the spring portion 8 from accidentally protruding outward as shown in FIG. In correspondence with the position where the spring portion 8 protrudes most, the bottom portion 7 of the case portion 5 is provided with a protruding portion 71 protruding inward, and the protruding portion 71 is provided with an engaging portion 72 which engages with the spring portion 8. You may.

FIG. 9 is an explanatory view of an example of use of the noise current absorber of the first embodiment. Next, referring to FIG. 1 to FIG.
A method of using the noise current absorber will be described. First, ferrites 3a and 3b are attached to case portions 5 and 6 of holding case 1, respectively.
Is inserted. The ferrites 3a, 3b inserted in the case parts 5, 6 are held in the case parts 5, 6 with play.

The noise current absorber 1 into which the ferrites 3a and 3b are inserted as described above, as shown in FIG. Close the case part 5 and the case part 6 of the holding case 2,
It is mounted so as to be fitted around the electric wire 35.

When the holding case 2 is closed, the locking hook 12 of the case portion 6 is inserted into the locking holder 11 of the case portion 5 and locked with the locking claw 10, and this closed state is securely held. Is done. As shown in FIG. 9B, when the spring portion 8 is protruded outside the case portion 5, the ferrites 3a and 3b stored in the case portions 5 and 6 are held in the holding case as shown in FIG. 2, the ferrite 3a and the ferrite 3b are separated from each other.
1 are not crimped together.

Therefore, the diameter of the electric wire 35 is set to the groove 33 for passing the electric wire provided in the ferrites 3a and 3b shown in FIG.
Even when the width R is substantially equal to the width R, no frictional resistance occurs between the electric wire 35 and the electric wire insertion hole 34, so that the noise current absorber 1 can be freely moved with respect to the electric wire 35. As a result, the noise current absorber 1 can be moved to a desired position, for example, a position where noise current absorption is most efficient, without opening the holding case 2 of the noise current absorber 1.

When the spring portion 8 is protruded inward as shown in FIG. 9 (c), the ferrite 3a stored in the case portion 5 is actuated by the action of the spring portion 8 as shown in FIG. 6 is pressed against the ferrite 3b stored in
The divided surfaces 31 of the ferrites 3a and 3b are pressed together.

Therefore, when the diameter of the electric wire is substantially equal to the width R of the groove 33 for passing the electric wire provided in the ferrite 3 shown in FIG. 1, the frictional resistance between the electric wire 35 and the electric wire insertion hole 34 is reduced. As a result, the noise current absorber 1 is firmly fixed to the electric wire 35. As described above, according to the present embodiment, by changing the protruding direction of the spring portion 8 to the outside or the inside, the divided surfaces 31 of the ferrites 3a and 3b can be crimped or released, and the ferrites 3a and 3b can be released. 3b
Current absorber 1 to an electric wire 35 having substantially the same diameter as the groove 33 of FIG.
Is attached, the spring current 8 can be protruded outward, so that the noise current absorbing device 1 can be moved with respect to the electric wire 35. By projecting the spring device 8 inside, the noise current absorbing device 1 can be moved. 1 can be firmly fixed to the electric wire 35.

Therefore, the holding case 2 of the noise current absorber 1
, The noise current absorber 1 can be easily moved to a desired position and fixed. Also,
By pressing the two ferrites 3a and 3b in the holding case 2 together at the division surface 31, a magnetic flux density sufficient to absorb noise current can be obtained.

Further, since the spring portion 8 is provided integrally with the holding case 2, the number of parts can be reduced. FIG.
FIGS. 0 to 12 are explanatory diagrams showing a second embodiment of the present invention. Next, a second embodiment will be described.

As shown in FIG.
Is provided with a leaf spring portion 81 having one end connected to the bottom portion 7 and the other end swingable. A handle 82 is provided at the tip of the leaf spring portion 81. The bottom portion 7 of the case portion 5 on the other end side of the leaf spring portion 81 has an engaging portion 7 that engages with the leaf spring portion 81.
3 are provided. The other configuration is the same as that of the first embodiment, and the description is omitted.

As shown in FIG. 11, when the leaf spring portion 81 is engaged with the engaging portion 73, the leaf spring portion 81 projects to the inside of the case portion 5, as in the first embodiment. . As shown in FIG. 12 (a), when the end of the leaf spring portion 81 is removed from the case portion 5, the ferrites 3a, 3b stored in the case portions 5, 6 become the holding case 2 as shown in FIG. The split surfaces 31 of the ferrite 3a and the ferrite 3b are not pressed against each other.

Therefore, the diameter of the electric wire 35 is not limited to the groove 33 for passing the electric wire provided in the ferrites 3a and 3b shown in FIG.
Even when the width R is substantially equal to the width R, no frictional resistance occurs between the electric wire 35 and the electric wire insertion hole 34, so that the noise current absorber 1 can be freely moved with respect to the electric wire 35.

As shown in FIG. 12B, the leaf spring 81
Is engaged with the engaging portion 73 to protrude the leaf spring portion 81 inward, and the ferrite 3 a stored in the case portion 5 is stored in the case portion 6 by the action of the spring portion 8. Pressed against the ferrite 3b, the ferrites 3a, 3
The divided surfaces 31 of b are pressed together.

Therefore, the diameter of the electric wire 35 is set to the groove 33 for passing the electric wire provided in the ferrites 3a and 3b shown in FIG.
Is approximately equal to the width R of the electric wire 35 and the electric wire insertion hole 3.
4, the noise current absorber 1 is firmly fixed to the electric wire 35. Therefore, also in the second embodiment, it is possible to provide a noise current absorber having a small number of components and capable of easily changing the mounting position with respect to the electric wire.

[0031]

As described above, according to the present invention, the two divided magnetic bodies can be pressed against each other or the pressed state can be released without opening the holding case. Also, if the spring part is protruding inside the case,
The protrusion provided on the holding case engages with the spring.
By doing so, the spring part may accidentally protrude outward.
Is prevented. When the noise current absorber of the present invention is attached to an electric wire having substantially the same size as the hole through which the electric wire is inserted, the crimped state of the magnetic material is released, so that the noise current absorber can be freely moved with respect to the electric wire. The noise current absorbing device can be firmly fixed to the electric wire by crimping the magnetic materials together, so that the noise current absorbing device can be fixed without opening the holding case of the noise current absorbing device. The mounting position can be easily changed.

Further, by integrating the spring portion and the holding case, the number of parts can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration of a noise current absorber according to a first embodiment of the present invention.

FIG. 2 is a front view showing the outer surface of the holding case shown in FIG.

FIG. 3 is a sectional view taken along line AA shown in FIG. 2;

FIG. 4 is a cross-sectional view of the noise current absorber when a spring portion is protruded outward.

FIG. 5 is a sectional view taken along line BB shown in FIG. 4;

FIG. 6 is a cross-sectional view of the noise current absorber when a spring portion is protruded inward.

FIG. 7 is a sectional view taken along line CC shown in FIG. 6;

FIG. 8 is an explanatory diagram of a configuration of an engagement portion that engages with a spring portion.

FIG. 9 is an explanatory diagram of an example of use of the noise current absorber of the first embodiment.

FIG. 10 is an explanatory diagram showing a configuration of a second example of the present invention.

FIG. 11 is an explanatory view showing a state in which the leaf spring portion of the second embodiment is engaged with the engaging portion.

FIG. 12 is an explanatory diagram of a usage example of the noise current absorber of the second embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Noise current absorber, 2 ... Holding case, 3a, 3b ... Ferrite 5, 6 ... Case part, 8 ... Spring part, 31 ... Dividing surface, 34 ...
Wire insertion hole 35: Electric wire, 81: Leaf spring part

Claims (2)

(57) [Claims] A magnetic body divided into two along a hole through which the electric wire is inserted, and a case part for accommodating the magnetic material, wherein the magnetic body is formed into a shape surrounding the outer peripheral portion of the electric wire of the electronic device; A holding case formed such that the case portion can be opened and closed,
In a noise current absorbing device for absorbing a noise current flowing through the electric wire by crimping a divided surface of the magnetic material, the holding case is formed so as to be selectively protruded into either the inside or the outside of the case. is, when the protruding inward, a spring portion for crimping the dividing plane of the magnetic, the spring portion and the engagement protruding inside the holding case
To prevent the spring portion from projecting outward.
A noise current absorbing device, wherein a noise portion is provided. 2. A magnetic body formed in a shape surrounding an outer peripheral portion of an electric wire of an electronic device, comprising a magnetic body divided into two along a hole through which the electric wire is inserted, and a case part for accommodating the magnetic body, respectively. A holding case formed such that the case portion can be opened and closed,
In the noise current absorbing device for absorbing a noise current flowing through the electric wire by crimping a divided surface of the magnetic body, one end of the holding case is connected to the case, and the other end is swingably provided. A leaf spring portion, and an engaging portion that engages with the other end of the leaf spring portion so that the leaf spring portion protrudes inside the case in order to press the split surface of the magnetic body by the leaf spring portion. A noise current absorber comprising: