JPH0726815Y2 - Data line filter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is to house a magnetic core composed of a pair of magnetic core pieces in a case composed of a pair of case members, and to bond a pair of magnetic core pieces to a joint surface. The data line with the data line insertion hole formed between the pair of magnetic core pieces by crimping
Regarding filters.

(Prior Art) Conventionally, a data line that is arranged on a data line connecting a main body of an electronic device and its terminal, for example, a personal computer and a display or a printer, and removes noise superimposed on a signal flowing on the data line. Filters are known.

Data line filters that reduce the noise of already wired electronic devices often use two divided core pieces of tubular ferrite cores that cover the data lines but abut on their joint surfaces. A resin case is used to hold the core piece. In this data line filter, if there is a gap between the data line and the data line insertion hole of the cylindrical core, it tends to occur on the wall surface of the data line insertion hole when the magnetic core moves. There is a case where the data line is damaged by an acute edge or a chip due to the burr.

To solve this problem, we propose a data line filter that fixes the case to the data line by providing a data line locking claw extending toward the center of the insertion hole on the inner peripheral surface of the data line insertion hole on the side wall of the case. Has been
63-134509).

(Problems to be solved by the invention) In the proposed data line filter described above, the force for fixing the case to the data line is different due to the difference in the thickness of the data line. Not enough fixing force can be obtained. On the contrary, when the gap between the data line and the data line insertion hole of the cylindrical core is extremely small, the data line acts to spread the joining surface of the two magnetic core pieces, resulting in deterioration of characteristics. There were challenges.

An object of the present invention is to solve such a conventional problem and to propose a data line filter having a wide applicable range of the thickness of the data line, which can fix the magnetic core.

(Means for Solving the Problems) In order to achieve the above object, the present invention comprises a pair of magnetic core pieces each having a joint surface, and one joint surface is pressure-bonded to the other joint surface. The magnetic core has a data line insertion hole formed between the pair of magnetic core pieces, and a pair of case members respectively accommodating the pair of magnetic core pieces. The side wall joints of the pair of case members are joined together. In a data line filter constituted by a case in which a pair of recesses for data line insertion holes are formed, at least one rod-shaped data line fixing piece is provided in the pair of recesses for data line insertion holes. The line fixing piece bends when the data line is inserted into the data line insertion hole formed by joining the pair of case members,
The elastic force causes the data line to be sandwiched along the circumferential direction, and the case is fixed to the data line. At least one annular data line fixing piece may be provided in a protruding manner in the pair of data line insertion hole recesses.

(Operation) When the data line is inserted through the data line insertion hole on the side wall of the case that houses the pair of magnetic core pieces, the rod-shaped data line fixing piece provided in the data line insertion hole is adjusted according to the thickness of the data line. Since the case is fixed to the data line by sandwiching the data line along its circumferential direction by its elastic force and the elastic force, the case can be fixed to a comparatively thin data line and the comparatively thick data line can also be fixed. The fixing piece does not spread the joint surfaces of the two magnetic core pieces.

Also in the case where the annular data line fixing piece is projected in the concave portion for the data line inserting hole of the case member, the data line fixing piece is deformed when the data line is inserted into the data line inserting hole of the case and its elastic force is exerted. Since it is pressed against the data line, the case can be fixed to a relatively thin data line, and the annular data line fixing piece can be largely deformed. The joint surface of is not expanded.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings.

1 to 7 show an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a joint surface 2 and one joint surface 2
It is composed of a pair of semi-cylindrical magnetic core pieces 1a and 1b in which a closed magnetic path is formed by crimping to the other joint surface 2, and a recess 3 is formed in the joint surface 2 of the pair of magnetic core pieces 1a and 1b. When formed, the data line insertion hole 4 is formed between the pair of magnetic material core pieces 1a and 1b, for example, a cylindrical magnetic material core made of ferrite. Reference numerals 5a and 5b are semi-cylindrical case members made of, for example, plastic for accommodating and fixing the pair of magnetic core pieces 1a and 1b of the magnetic core 1, respectively.
Is connected to the case 5 by a pair of hinge pieces 6 so as to be openable and closable.
The data line insertion hole recesses 8 are formed in the joints of the both side walls 7, and the locking pieces 10a, 10b are provided in the joints of the peripheral walls 9a, 9b. This locking piece 10a, 1
The case members 5a, 5b are fixed so as not to open by fitting the locking pieces 11 into the case 0b with the case members 5a, 5b closed.

When the case members 5a and 5b are closed, the two recesses 8 are
The data line insertion hole 12 is formed, and a pair of rod-shaped data line fixing pieces 14 are formed on both sides of the recess 8 by forming grooves 13.

As shown in FIG. 2, when the data line 15 is inserted into the data line insertion holes 12 and 4 of the case 5 and the magnetic core 1, the pair of data line fixing pieces 14 of the both side walls 7 are bent, and the elastic force is exerted by the elastic force. The data line 15 is sandwiched along the circumferential direction and the case 5 is fixed to the data line 15.

FIG. 5 shows the hexagonal data line insertion hole 12 when the data line 15 is not inserted.
As shown in FIGS. 6 and 7, when the data line 15 is inserted, the data line fixing piece 14 bends, and the bending changes depending on the size of the diameter of the data line 15.

FIGS. 8 and 9 show a second embodiment in which one rod-shaped data line fixing piece 14 is provided in each of the recesses 8 of the case members 5a and 5b, and the pair of data line fixing pieces 14 and 14 are The elastic force sandwiches the data line 15 along its circumferential direction to fix the case 5 to the data line 15.

10 and 11 show that the recesses 8 of the case members 5a and 5b are formed in a semicircular shape, and a pair of curved rod-shaped data line fixing pieces 14 are provided on the inner peripheral surface of the recesses 8 at predetermined intervals. When the data line 15 is inserted into the data line insertion hole 12, the pair of data line fixing pieces 14 and 14 bend to sandwich the data line 15 by its elastic force and fix the case 5 to the data line 15. It is a third embodiment of the present invention.

In the fourth embodiment of the present invention shown in FIGS. 12 and 13, two through holes 16 are provided in each side wall 7 of the case members 5a and 5b, and both ends are fixed between them and the recess 8. And a pair of rod-shaped data line fixing pieces 14, 14 are formed. According to this structure, when the data line 15 is inserted into the data line insertion hole 12 formed by the pair of recesses 8, the intermediate portion of the data line fixing piece 14 is bent, and the data line 15 is elastically deformed.
The case 5 is sandwiched and the case 5 is fixed to the data line 15.

14 and 15 show a fifth embodiment of the present invention in which, for example, an annular data line fixing piece 14 having an outer shape of a rhombus is projected in each recess 8 of the case members 5a and 5b.

According to this embodiment, when the data line 15 is inserted into the data line insertion hole 12, the annular data line fixing piece 14 is deformed and becomes flat, and the elastic force of the data line 15
The case 5 is fixed to the data line 15 since it is pressed against.

The second embodiment shown in FIGS. 8 and 9 and the third embodiment
In both the embodiment and the fifth embodiment, the case member 5a,
Although the data line fixing pieces 14 are provided in the concave portions 8 of 5b, respectively, the data line fixing pieces 14 may be provided only in the concave portions 8 of the one case member 5a or 5b.

(Advantages of the Invention) Since the present invention has the above-mentioned configuration, the magnetic core of the data line filter can be fixed to the data line having a wide range of thickness, and the data line can be It is possible to provide a data line filter that is not damaged by burrs or edges of the insertion holes.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention, FIG. 2 is a perspective view showing a state in which a data line is inserted, FIG. 3 is a perspective view of the same with an open case, and FIG. FIG. 5, FIG. 6, FIG. 6 and FIG. 7 of the body core are side views showing a state in which no data line is inserted and a data line having a different thickness is inserted, and FIG. FIG. 9 is a side view of the embodiment of the present invention with a data line inserted, FIG. 10 is a side view of a third embodiment of the present invention, and FIG. 11 is a side view of the same with a data line inserted. FIG. 12 is a side view of the fourth embodiment of the present invention, FIG. 13 is a side view of the same when a data line is inserted, FIG. 14 is a side view of the fifth embodiment of the present invention, and FIG. 15 is a data line. It is the side view which inserted. 1 ... Magnetic core 1a, 1b ... Magnetic core piece 4 ... Data line insertion hole 5 ... Case 5a, 5b ... Case member 8 ... Data line insertion hole recess 12 ... Data line insertion hole 14 …… Data line fixing piece 15 …… Data line

Claims (2)

[Scope of utility model registration request] 1. A pair of magnetic material core pieces each having a bonding surface, and a data line insertion hole is formed between the pair of magnetic material core pieces by crimping one bonding surface to the other bonding surface. It is composed of a magnetic material core and a pair of case members respectively accommodating the pair of magnetic material core pieces, and a case in which a pair of data line insertion hole recesses are formed at the joints of the side walls of the pair of case members. In the data line filter described above, at least one rod-shaped data line fixing piece is provided in each of the pair of data line insertion hole recesses, and the data line fixing piece is formed by joining the pair of case members. When the data line is inserted through the data line insertion hole, it bends, and the elastic force pinches the data line along its circumference, fixing the case to the data line. Data line, characterized in that the -
filter. 2. A data line insertion hole is formed between a pair of magnetic material core pieces by crimping one bonding surface to the other bonding surface piece. It is composed of a magnetic material core and a pair of case members respectively accommodating the pair of magnetic material core pieces, and a case in which a pair of data line insertion hole recesses are formed at the joints of the side walls of the pair of case members. In the data line filter described above, at least one annular data line fixing piece is provided in a projecting manner in each of the pair of data line insertion hole recesses, and the data line fixing piece is formed by joining the pair of case members. When the data line is inserted into the data line insertion hole, it is deformed, its elastic force presses against the data line, and the case is fixed to the data line. Data line filter that.