JPH051053Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an improvement of a case for housing a divided toroidal core.

[Prior Art] Generally, in order to attenuate or eliminate noise generated from or in the signal line of an electronic device, a portion of the signal line near the connector or outlet is inserted into a through-hole of a core having a through-hole. Passing is being done.

An example of the conventional noise attenuating core is shown in FIG. 7b. A toroidal core 2 having a through hole 7 in the center is divided into two halves by a plane passing through the central axis of the through hole 7, and the divided core 2 surrounds the signal line 17 of the electronic device. do. and,
The outer circumference of the core 2 is tightened with a nylon band 13 or the like as shown in FIG. 7a. The band 13 has a lock hole 14 in the head 15, and lock teeth 16 are passed through the lock hole 14 and fixed.

FIG. 8 shows another conventional example of a noise attenuation core. A toroidal core 2 having a through hole 7 in the center is inserted into an insulating case 1 having a bottom plate 5 that joins one end of an outer cylinder wall 3 and an inner cylinder wall 4, and is covered with a cover plate 18. be. It is used by passing a signal line through the through hole 6.

[Problem to be solved by the invention] In the example of the conventional magnetic core shown in FIG.
It is extremely easy to tighten. but,
The nylon band 13 is a disposable type, and there is a problem in that the band 13 must be cut if it becomes necessary to remove the core 2 once it has been aligned and fixed. Further, no treatment was taken in the direction of the signal line 17, leaving it in a free state, resulting in a drawback that the position could shift.

In the conventional example of a magnetic core with a case shown in FIG. 8, when the core 2 has no cut and the shape of the signal line connector or outlet is larger than the through hole 6, when the core 2 is set on the signal line. However, there was a problem in that it was necessary to remove the connector and outlet and pass the signal line through the through hole.

Therefore, an object of the present invention is to provide a magnetic core with a case that can solve the problems in the prior art described above.

[Means for Solving the Problems] The object of the present invention is to provide a double cylindrical body having a through hole 6 at the center where the outer circumferential wall 3, the inner circumferential wall 4, and the end wall 5 are integrated. Case 1 exhibiting
and a core 2 having a columnar shape and having a through hole 7 at the center, which is housed in the case 1 by being fitted between the inner and outer walls 3 and 4, The core 2 is equally divided into two divided bodies 8 and 9 by a plane passing through the central axis of the through hole 7, and the side surface of the case 1 is 180° from the outer peripheral wall 3. This is achieved by a magnetic core with a case characterized in that a notch 10 is opened from the outer peripheral wall 3 to the through hole 6 while leaving an angle exceeding .

[Function] In the magnetic core with a case configured as described above, the annular core is divided into two halves, one of the cores is housed in the case, and then the signal line is routed from the notch provided in the case to the center through hole. Since the other core is fitted into the case to form an annular shape, it is possible to easily pass the signal line connector etc. through the through hole of the core without removing it from the electronic device main body. Removal is similarly easy.

[Embodiments] Hereinafter, embodiments of the present invention including a magnetic core with a case will be described in detail with reference to the accompanying drawings.

FIGS. 1A to 1D and 2 are a perspective view and a bottom view showing an embodiment of the present invention. In Figures 1a and d, the case 1 of the core 2 consists of an outer peripheral wall 3 and an inner peripheral wall 4, and the ends of the walls 3 and 4 are
They are connected by an end wall portion 5 to form an integral body.
In the center thereof, there is a through hole 6 through which a signal line 17 of an electronic device or the like is passed, and the case 1 has a double cylindrical shape. The case 1 holds the core 2 together and serves as an insulator, and is made of resin such as ABS.

The ring-shaped core 2 is divided into two parts and housed in the insulating case 1 formed in the double cylindrical shape as divided core bodies 8 and 9 as shown in FIGS. 1b and 1c. The core 2 forms a ring shape when fitted into the case 1. or,
The core 2 has a through hole 7 in the center thereof for passing a signal line, and is formed into a columnar shape. The core 2 is
The through hole 7 is equally divided into two divided bodies 8 and 9 by a plane passing through the central axis thereof. and,
The core 2 is made of a magnetic material such as metal, ferrite, powder, etc. It may be made in two parts from the beginning.

Further, one side of the case 1 is opened by a notch 10 extending from the cylindrical outer wall 3 to the through hole 6 while leaving an angle portion exceeding 180° of the cylindrical outer wall 3. ing. FIG. 1a is a diagram with the first core segment 8 inserted, and FIG. 1d is a diagram with both the first and second core segments 8 and 9 inserted. In the case of the magnetic core configured in this way, the signal line 17 is first inserted into the through hole 6 from the notch 10 of the case 1, and then the signal line 17 is inserted into the through hole 6 as shown in FIG.
By fitting the core divided bodies 8 and 9 into the case 1 in the order of -d, they can be set to the signal line 17 extremely easily. To remove it, do the opposite. This is also easy. Since no engaging portion is required, manufacturing is simple and low cost. When the core with case is viewed from the bottom, it looks like Figure 2.

FIGS. 3a to 3c and 4 show other embodiments of the cased magnetic core of the present invention.

In this embodiment, the cylindrical case 1 shown in FIG. 1 is divided into upper and lower parts 1A and 1B. In this case as well, the cutout portion 10 is formed at an angle smaller than 180° to prevent the core from coming off. The first core divided body 8 is fitted into the lower case 1A which is divided into two parts, and a signal line of an electronic device or the like is inserted into the through hole 6 provided in the center from the notch 10.
The second core divided body 9 is fitted into this as shown in FIG. 3b, and the upper case 1B is covered. Split case 1
A and 1B may have the same shape, and if they are formed so that the notch part has a cylindrical shape with an angle of 180° or less,
The size of the notch portion may vary within the range into which the core can be inserted. The core of the second embodiment can also be easily set on the signal line as in the first embodiment.

FIG. 3c shows the final shape of the second embodiment, which includes case 1A and case 1.
If the notches B are made to differ by approximately 180 degrees, the entire outer periphery of the core can be placed between Case 1A and Case 1B.
The core is coated with either of the above, and the stored state of the core becomes more stable. As in the case of the first embodiment,
It goes without saying that the notches 10 may coincide with each other. When the core with case is viewed from the side, it looks like Figure 4.

FIGS. 5a, 5b and 5c show still another embodiment of the present invention. As the core is the same as in FIG. 1, it is omitted here and only the case is shown. The difference from the first embodiment is that the upper open portion of the case 1 is closed by a cover plate 18 that fits into this portion. The cover plate 18 is adhered to the case 1 with a resin adhesive. An example of the shape of the lid plate 18 is
Figures 5b and 5c. Notches 11 and 12 that allow the signal line 17 to be inserted into the center through hole 6 of the case 1
If this is provided, the core can be easily set on the signal line 17. Case notch 11,1 of cover plate 18
2 does not need to have the same final shape as the notch 10 of the case. The cover plate 18 makes it difficult for the core to come off.

FIGS. 6a and 6b show still another embodiment of the present invention. As shown in the figure, a claw 19 is provided on the inner surface of the outer peripheral wall 3 of the case 1, and a recess 20 for engaging the claw 19 is formed in the core segment 8 or 9. The rest is the same as the first embodiment.
The locking claw 19 may be provided on the outside of the inner circumferential wall portion 4 of the case 1, and a recess 20 for locking the locking claw 19 may be provided in the core divided bodies 8, 9.

Although the above description has been made regarding the case of an annular core, the present invention is equally applicable to a case where the core is square. Furthermore, the first core division body 8 and the second core division body 9 are not limited to the same shape, but even if they have different shapes, as long as they are formed to a size that does not come off from the notch 10. good.

The cased magnetic core of the present invention can also be applied to a toroidal coil containing a magnetic core, in which a thin insulated wire is wound in a toroidal shape after the core is housed in a core case.

[Effect of the invention] As can be seen from the above description, according to the cased magnetic core of the present invention, the annular core is divided into two for the time being,
There is a notch in one corner of the case that is large enough to prevent the divided core from coming off, and the signal wire, etc. is inserted from the notch into the central through-hole, making it extremely easy to attach and remove the signal wire, etc. It has the effect of

Further, by using a cover plate, a locking claw, etc., or by dividing the case into two parts, it is possible to securely hold the core.

Furthermore, since no engaging portion is basically required, it also has the advantage of being easy to manufacture and low cost.

[Brief explanation of the drawing]

Figures 1a and d are perspective views illustrating the structure of an embodiment of the cased magnetic core of the present invention, Figure 1b,
c is a perspective view similarly showing the core divided body, the second
The figure is a bottom view of the magnetic core with the case shown in FIG. 1, FIGS. A side view of the magnetic core, FIGS. 5a, b, and c, a perspective view of the case portion, and a top view of the cover plate portion, FIGS. 6a and 6c, for explaining another embodiment of the present invention. FIG. 7b is a perspective view of a case portion for explaining yet another embodiment, and a perspective view showing one of the core division bodies, and FIGS. 7a and 7b are for configuring a conventional annular magnetic core. FIG. 8 is a perspective view showing another example of the structure of a conventional magnetic core with a case. 1, 1A, 1B...Case, 2...Annular core,
3...Outer peripheral wall, 4...Inner peripheral wall, 5...End wall, 6...Through hole in case, 7...Through hole in core, 8, 9...Core division body, 10...Cut Notch, 17...signal line, 18...cover plate.

Claims (1)

[Scope of utility model registration request] A case 1 having a double cylindrical shape having a through hole 6 at the center where an outer circumferential wall 3, an inner circumferential wall 4, and an end wall 5 are integrated, and the inner and outer walls 3, 4.
In a magnetic core with a case, the core 2 is housed in the case 1 and has a columnar shape and has a through hole 7 in the center. The case 1 is equally divided into two divided bodies 8 and 9 by a plane passing through the central axis, and the side surface of the case 1 is connected to the outer peripheral wall 3.
While leaving an angle exceeding 180°, the outer peripheral wall 3
A magnetic core with a case, characterized in that a notch 10 is opened from the to the through hole 6.