JPH0217451Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to the structure of a core case for holding a split-type annular core for preventing electromagnetic interference by passing a signal line through the core case.

[Conventional technology]

To prevent electromagnetic interference caused by external electrical noise, signal lines for digital devices are combined with annular ferrite cores during wiring. That is, the signal line is passed through the annular core. However, it is generally difficult to combine an annular core with a signal line whose wiring has been completed. Conventionally, two semi-annular cores are butted against each other from both sides of a signal line to form an annular shape, and an insulating tape is wrapped around the outer periphery of the annular core thus obtained, thereby maintaining the annular shape.

[Problem that the invention attempts to solve]

However, winding tape around the outer periphery of such a split annular core not only requires a large number of man-hours, but also has problems with the magnetic properties due to differences in the winding strength of the tape, misalignment of the abutting surfaces of the core, etc. bring about major changes. Also, the inner peripheral edge of the core may damage the signal line.

It is therefore an object of the present invention to provide a core case that overcomes the drawbacks of the prior art. [Means and effects for solving the problems] According to the present invention, a core that holds an annular core made of a combination of a plurality of core elements with a signal line passing through its hollow hole, The strap includes a strap extending along the outer peripheral surface of the annular core, and a plurality of side plates extending radially inward from each side edge of the strap, and the strap has a plurality of engagement teeth at one end. death,
It has a locking part having a locking pawl for locking the engagement tooth at the other end, and each of the plurality of side plates extends to a position corresponding to the hole in the annular core. A core case with characteristics can be obtained.

〔Example〕

1 and 2 show an embodiment of the core case according to the present invention. The core case 1 is integrally formed with a strap 2 made of a soft elastic plastic material and a number of side plates 3 extending perpendicularly to the strap 2 from both side edges of the strap 2. A square hole 6 is provided at one end of the strap 3, and a locking portion 4 with a locking claw 5 is formed inside the square hole 6. On the other hand, the other end, that is, the free end of the strap 2 is tapered and thin, and there is a locking portion 4 there.
A plurality of locking teeth 7 are provided, which are shaped so that they can be easily inserted into the square hole 6 without engaging the locking pawl 5, but engage with the locking pawl 5 when pulled. Further, each side plate 3 has a trapezoidal shape,
In addition, its height is larger than the wall thickness of the split annular core to be supported.

When attaching the split-type annular core to the signal line, first, as shown by the chain line in FIG. . Next, another semi-annular core element 9 is placed on top of the semi-annular core element 8 so as to butt each other. Then, while applying pressure, the free end of the strap 2 is inserted into the square hole 6 of the locking part 4 and pulled. Even if this tensile force is released, the locking teeth 7 engage with the locking claws 5, so that the strap 2 does not loosen. The work of attaching the split annular core to the signal line 10 is thus completed, and the two semi-annular core elements 8, 9 are firmly assembled to each other in the radial direction.

In this attached state, each of the many side plates 3 faces the axial end surface of the annular core, and cooperates with each other to constitute a substantial ring plate. Therefore, relative displacement of the two semi-annular core elements 8, 9 in the axial direction is prevented. Further, since the tips of the side plates 3 made of a soft elastic plastic material extend to positions corresponding to the holes in the annular core, the signal wires 10 are not damaged by the inner peripheral edge of the core.

[Effect of idea]

According to the present invention, an annular core consisting of a combination of multiple core elements can be easily combined with a signal line where wiring has been completed, and the core elements can be firmly butted together without shifting in the axial and diametrical directions. Since it can be held, stable magnetic properties can be obtained, and many other effects can be obtained, such as protecting the core from vibrations and shocks and preventing damage to signal lines caused by the inner peripheral edge of the core.

[Brief explanation of the drawing]

Fig. 1 is an external view showing one embodiment of the present invention;
The figure is also a developed view, and FIG. 3 is a perspective view showing the state in which it is used. 1...Core case, 2...Webbing cord, 3...Side plate,
4... Engaging portion, 5... Locking claw, 6... Square hole, 7...
... Locking tooth, 8, 9 ... Semi-annular core element, 10...
…Signal line.

Claims (1)

[Claims for Utility Model Registration] 1. A core case that holds an annular core made of a combination of a plurality of core elements with a signal line passing through its hollow hole, the core case having a signal line extending along the outer peripheral surface of the annular core. The strap has a plurality of engaging teeth at one end, and a plurality of side plates extending radially inward from each side edge of the strap. 1. A core case comprising a locking portion having a locking pawl for locking an engaging tooth, and each of the plurality of side plates extending to a position corresponding to the inner hole of the annular core. 2. The utility model according to claim 1, wherein the plurality of side plates cooperate with each other to integrally form substantial ring plates on each of both side edges of the strap. core case.