JPH0632719Y2 - Ferrite core fixed structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a fixing structure for fixing a ferrite core to a wire.

(Prior Art) Conventionally, a ferrite core made of a magnetic material is fixed to an interface cable or the like connected between electronic devices to block noise between the electronic devices. However, conventionally, there is no particular device for fixing the ferrite core,
As a fixing mechanism, for example, there is one shown in FIGS. 6 and 7. FIG. 6 is a sectional view showing a conventional ferrite core fixing structure, and FIG. 7 is a sectional view taken along the line AA of FIG. 6, which will be described below with reference to the drawings.

6 and 7, a through hole 2 is formed in the ferrite core 1, and a wire 3 is inserted in the through hole 2. Tie wraps 4 are attached to the wire 3 on both sides of the ferrite core 1. A heat shrinkable tube 5 is covered so as to cover the ferrite core 1 and the tie wrap 4.

Next, the operation of fixing the ferrite core 1 will be described.

First, the ferrite core 1 is inserted into the wire rod 3 to the fixed position. When it is inserted to the fixed position, the tie wrap 4 is then wound around the wire 3 near both ends of the ferrite core 1. Wrap the tie wrap 4 and cut off the remaining part with nippers. As a result, the position of the ferrite core 1 is fixed.
Next, a heat shrinkable tube 5 is put on and shrinked by heating to close the ferrite core 1 and the tie wrap 4.
Do as above.

(Problems to be solved by the invention) However, in the above-described conventional fixing structure, when winding the tie wrap, it takes time to tighten the tie wrap, and a nipper or the like is used to cut off the excess portion of the tie wrap. There is a problem that it takes time because it must be done.

Also, when it is necessary to move the ferrite core along the wire, the tie wrap must be cut off, the ferrite core must be moved, and another tie wrap must be wound at the destination position. There was also a problem.

The present invention has been made in view of the above problems, and an object of the present invention is to use a ferrite core retainer so that the work of fixing the ferrite core is not troublesome and the movement of the ferrite core is facilitated. It is intended to provide a fixed structure.

(Means for Solving the Problem) Means taken for solving the above-mentioned problems are as follows: Two ring portions each having an elliptical hole, and an arm portion for supporting the two ring portions at opposite ends thereof. By providing an elastic ferrite core fixing device consisting of and,
The major axis of the elliptical hole is longer than the diameter of the wire rod, the minor axis of the elliptical hole is shorter than the diameter, and the maximum length of each ring portion is larger than the inner diameter of the cylindrical ferrite core. That is, the length is larger than the axial length of the ferrite core.

(Operation) Next, the operation of the present invention having the above configuration will be described.

When fixing the ferrite core to the wire rod, first, the elasticity of the ferrite core fixer is used to insert the ferrite core into the hole of the ferrite core so that the arm portion enters the hole. At this time, since the maximum lengths of the ring portions at both ends are larger than the inner diameter of the ferrite core, the ferrite core fixing device does not come out from the hole of the ferrite core. Next, insert the wire into the elliptical hole in the ring. In this case, apply force so that the major axis of the elliptical hole becomes shorter, and insert the wire so that the elliptical hole approaches a perfect circle. . When inserted into place, remove the force applied to the ring. The ferrite core is fixed in position on the wire by the restoring force of the ring portion at this time.

(Embodiment) An embodiment according to the present invention will be described below with reference to the drawings.
Elements common to the drawings are given the same reference numerals.

FIG. 1 is a sectional view showing an embodiment according to the present invention, and FIG. 2 is a perspective view showing a ferrite core fixing device according to an embodiment of the present invention.

In FIGS. 1 and 2, a ferrite core fixing device 6 is inserted into the through hole 2 of the ferrite core 1. As shown in FIG. 2, the ferrite core fixing device 6 has elliptical holes 8 formed in the ring portions 7 at both ends, and the wire 3 is inserted into the elliptic holes 8. The ferrite core 1 and the ferrite core fixing device 6 are covered with a heat-shrinkable tube 5 in a sealed state.

In FIG. 2, the ferrite core fixing device 6 is composed of the ring portion 7 and the arm portion 9 that supports the two ring portions 7 at both ends. Claws 7 are provided on the upper and lower ends of the ring 7.
a and 7b are formed. The ferrite core fixing device 6 is formed of a plastic member, but any other member may be used as long as it has elasticity. The two ring portions 7 are located opposite to each other, and the elliptical holes 8 formed in each ring portion 7 have the same size.

Next, the dimensional relationship of the ferrite core 1, the wire 3 and the ferrite core fixing device 6 will be described with reference to FIG. FIG. 3 is an explanatory view showing the mounting operation.

In FIG. 3, the arm portion 9 of the ferrite core fixing device 6 is shown.
Is slightly larger than the axial length b of the ferrite core 1. The maximum length c of the ring portion 7 is
The diameter is larger than the diameter d of the through hole 2 of the ferrite core 1, so that the ferrite core fixing device 6 cannot be easily removed when attached to the ferrite core 1. The major axis length e of the elliptical hole 8 formed in the ring portion 7 is larger than the diameter f of the wire rod 3 shown in FIG. 1, and the minor axis length g shown in FIG. 2 is the diameter of the wire rod 3. It is smaller than f.

Next, the operation for fixing the ferrite core to the wire will be further described with reference to FIGS. 4 and 5. FIG. 4 is a front view showing the attaching operation, and FIG. 5 is a side view showing the attaching operation.

First, the ferrite core fixing device 6 is inserted into the through hole 2 of the ferrite core 1. In FIG. 3, one ring portion 7 of the ferrite core fixing device 6 is bent in the direction of the arrow B to be in the state shown by the broken line. In this state, the bent ring portion 7 is inserted into the through hole 2 of the ferrite core 1 and pushed in first. Arm part 9 of the ferrite core fixing device 6
Since the length a of the ring is longer than the length b of the ferrite core 1, the pressed ring portion 7 comes out of the through hole 2 and returns to its original state by the restoring force of itself to be in the state shown in FIG. Here, since the length c of the ring portion is larger than the diameter d of the through hole 8, the ferrite core fixing device 6 does not come out.

Next, the wire 3 is inserted into the elliptical hole 8 of the ring member 7. However, as described above, the length g of the minor axis of the elliptical hole 8 depends on the wire rod 3
Since the diameter is smaller than f, it cannot be inserted as it is. Here, as shown in FIG. 6, force is applied to the claw portions 7a and 7b at the upper and lower ends of the ring portion 7 in the directions of arrows C and D, respectively, so that the elliptical hole 8 approaches a perfect circle. This makes the wire 3
Can be inserted. In this way, the claw portions 7a of the ring portion 7,
The wire 3 is inserted into the 7b with a force applied from both directions, and when the wire 3 is inserted to a predetermined position, the applied force is removed. As a result, the ring portion 7 tries to return to the original state, and the wire rod 3 is sandwiched by this force. As a result, the wire rod 3 is fixed in position. That is, the state shown in FIG. 1 is obtained. After that, the heat-shrinkable tube 5 is covered and heated to seal and protect the ferrite core 1 and the ferrite core fixing device 6.

In addition, when it is desired to move the fixing position of the ferrite core 1, if the heat-shrinkable tube 5 is covered, remove it and then insert the fifth part on the claws 7a and 7b of the ring part 7 of the ferrite core fixing device 6. By applying forces in the directions of arrows C and D shown in the figure, the elliptical hole 8 is deformed as described above to make the wire 3 movable, and by moving in this state, it is possible to easily move to the target position.

(Effect of the Invention) As described in detail above, according to the present invention, since the ferrite core fixing device is provided to fix the ferrite core to the wire rod, the labor for fixing is reduced and tools such as nippers are used. There is no need to use it.

In addition, since the ferrite core can be easily moved by deforming the ferrite core fixing device, there is an effect that the fixing position can be easily changed.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment according to the present invention, FIG. 2 is a perspective view showing a ferrite core fixing device according to an embodiment of the present invention, FIG. 3 is an explanatory view showing an attaching operation, and FIG. 5 is a front view showing the attaching operation, FIG. 5 is a side view showing the attaching operation, FIG. 6 is a sectional view showing a conventional ferrite core fixing structure, and FIG. 7 is an AA sectional view of FIG. DESCRIPTION OF SYMBOLS 1 ... Ferrite core, 3 ... Wire rod, 6 ... Ferrite core fixing device, 7 ... Ring part, 8 ... Elliptical hole, 9 ... Arm part

Claims (1)

[Scope of utility model registration request] 1. A fixing structure for fixing a cylindrical ferrite core to a wire, which comprises two ring portions each having an elliptical hole and arm portions for supporting the two ring portions at opposite ends thereof. An elastic ferrite core fixing device is provided, the major axis of the elliptical hole is longer than the diameter of the wire rod, the minor axis of the elliptical hole is shorter than the diameter, and the maximum length of each ring portion is the ferrite. The ferrite core fixing structure is characterized in that it is larger than the inner diameter of the core, and the length of the arm portion is larger than the axial length of the ferrite core.