JP2560144Y2 - Line filter - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a line filter which is externally mounted on a power cable, a signal cable, and the like, and relates to a structure of a core case and a cable holder for mounting a line filter core on a cable.

[0002]

2. Description of the Related Art Conventionally, in order to cut off noise flowing through a power supply line or a signal line, a line filter is formed by passing a cable through a ring-shaped core or a cylindrical core having a closed magnetic path. In general, a cylindrical or ring-shaped core is used by being divided into two and housed in a core case. As shown in FIG. 3, the core case is provided with cable mounting holes 4 at both ends of a cylindrical container through which cables pass, and a claw 3 that cuts into the surface of the cables and fixes the filter at a predetermined position of the cables.
Is further divided into two parts by a surface including the axis of the cylindrical container, one end is processed into a hinge shape, and the other end is processed with a hook 2 and a projection. Each of the above-mentioned tubular split-type cores for a filter was housed inside the core case 1, and a cable was passed through the center of the core so that the core case 1 was closed and the line filter was mounted so that the joint surfaces of the cores coincided.

As described above, conventionally, the claws 3 provided in the cable mounting holes 4 at both ends of the core case 1 are cut into the surface of the cable to fix the line filter at a predetermined position. If it is smaller than a certain thickness, it will not be possible to fix it.It is necessary to prepare several types of core cases according to the diameter of the cable, or to supplement the cable with a heat-shrinkable tube or fix it with a binding band. There was a problem such as there is.

[0004]

The problem to be solved by the present invention is to solve the above-mentioned problems, and to prepare a simple jig without preparing various types of core cases, to thereby prepare a cable having a wide range of thickness. To provide a line filter that can be mounted on a vehicle.

[0005]

In order to solve the above-mentioned problems, the line filter of the present invention is provided with a holder fixing groove for fitting and fixing a cable holder on the outer peripheral surface,
A core case in which a cable attachment hole having a sufficiently large diameter without a cable fixing claw is formed in a lid portion at both ends, and a core case is provided at both ends of a straight trunk portion which is fitted and locked in a holder fixing groove of the core case. It hangs at right angles from both ends of the straight trunk at an interval approximately equal to the length, is made of an elastic material, is slightly smaller than the target cable, and when fitted and locked to the core holder, the center is the center of the cable mounting hole It is used in combination with a cable holder provided with a horseshoe-shaped cable holding portion having a substantially matching open end with a leading end.

That is, according to the present invention, a cylindrical line filter core divided into two is housed in a cylindrical core case divided into two by a plane including a shaft, and the core case is closed.
In a line filter that works by inserting a cable through the center hole of the core and locking the core at a predetermined position of the cable, a rod-shaped straight trunk portion and both ends of the straight trunk portion are slightly larger than a target cable thickness. A cable holder integrally formed with a substantially horseshoe-shaped cable holding portion formed of an elastic material in a small shape, and a core case formed with a holder fixing groove for fitting and locking a straight stem of the cable holder on an outer peripheral surface. This is a line filter characterized by a structure combining.

[0007]

[Function] By fixing a cylindrical two-segment type line filter to a cable in combination with an external cable holder attached to a core case, a plurality of types of external cable holders are prepared according to the thickness of the cable. A single type of core case can be attached to many types of cables and used.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an external perspective view showing a line filter according to an embodiment of the present invention. FIG. 2 is an exploded perspective view illustrating the assembly of the line filter according to the embodiment of the present invention shown in FIG.

In FIG. 2, a cylindrical core case 1 made of an insulating resin is a hollow case having an outer diameter of about 35 mm and a length of about 40 mm, and a two-part cylindrical core is accommodated inside.
When the core case 1 is closed and the hook 2 is fixed, the cut surfaces of the inner core coincide with each other, and a closed magnetic path is formed around the cable. The central portion is formed so that a signal cable and a power cable can be inserted through the cable mounting hole 4.
mm. The outer surface of the core case 1 has a width of 5 mm.
A holder fixing groove 8 having a depth of 4 mm is provided. A cable holder 5 shown in the upper part of FIG. The part 6 is integrally processed.
In the present embodiment, the cable holding section 6 has a length of 14 mm to 5 m.
Samples of different sizes were prepared at 1 mm intervals up to m.

Next, as shown in FIG. 1, the side of the core case 1 containing the above-mentioned line filter core is opened, a cable 9 having an outer diameter of 15 mm is inserted, and the cable 9 is closed and fixed with the hook 2. However, even if the outer diameter of the cable is 15 mm, the cable can be freely moved in the core case. Is press-fitted into the cable holding portion 6 and the straight portion 7 is fitted into the holder fixing groove 8 of the core case 1, thereby fixing the core case 1 to the cable 9 and forming the line filter 10.
If necessary, the stem 7 may be fixed to the holder fixing groove 8 with an adhesive or the like. Next, when the diameter of the cable 9 is 7 mm, a line filter can be formed by selecting a cable holder having a cable holding portion 6 of 5 mm and fixing the core case to the cable in the same manner as described above. By preparing several types of cable holders as described above, a line filter can be attached to several types of cables having different thicknesses even with one type of core case.

[0011]

[Effects of the Invention] As described above, according to the present invention,
When attaching a cylindrical line filter to cables of different thicknesses, without increasing the number of expensive core cases,
By preparing only several types of cable holders, it is possible to supply a line filter that can be used simply and inexpensively for cables of different thicknesses.

[Brief description of the drawings]

FIG. 1 is an external perspective view showing a line filter according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view illustrating the assembly of the line filter of the embodiment of the present invention shown in FIG. 1;

FIG. 3 is an external perspective view showing a conventional line filter.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Core case 2 Hook 3 Claw 4 Cable mounting hole 5 Cable holder 6 Cable holding part 7 Straight trunk 8 Holder fixing groove 9 Cable 10 Line filter 11 Lid

Claims (1)

(57) [Scope of request for utility model registration] 1. A cylindrical core for a line filter, which is divided into two parts by a plane including a shaft, is housed in a cylindrical core case, and the core case is closed. In a line filter that works by inserting a cable and locking the core at a predetermined position of the cable, a rod-shaped straight trunk portion and both ends of the straight trunk portion are made of an elastic material with a shape slightly smaller than a target cable thickness. It features a structure combining a cable holder in which a processed approximately horseshoe-shaped cable holding portion is integrally provided, and a core case in which a holder fixing groove is formed on the outer peripheral surface for fitting and locking a straight trunk portion of the cable holder. And a line filter.