JPH0648813Y2 - Porous bead inductor - Google Patents

Description

[Detailed Description of Device] a. Purpose of the Invention [Field of Industrial Application] The present invention relates to a porous bead inductor used for preventing electromagnetic noise of a signal line.

[Conventional technology]

Electromagnetic induction noise in signal lines (hereinafter referred to as noise)
Have prevented a signal core from penetrating a ferrite core, usually called a bead core, which has a single central hole and is generally cylindrical in shape. Further, in order to prevent electromagnetic induction noise, a large number of bead cores are passed through a single signal line to improve the noise prevention performance. Further, instead of using a large number of bead cores, a porous bead core having a plurality of through holes formed in parallel with the axial direction is used, and one signal line is passed through the first through hole and is folded at the end face of the core to be adjacent to the signal line. Second
Repeat the winding procedure of passing through the through hole in the direction opposite to the direction of the first through hole, folding it back and passing through the third through hole, and step through all the through holes so that the lines do not overlap. It was used by passing the signal line through.

When a porous bead core is used, for example, an inductor in which one conductor of an insulation-coated copper wire is inserted into the through hole in a zigzag manner in advance, that is, a porous bead inductor is prepared in advance and is connected in the middle of the signal line to connect to the electromagnetic line. It was used to suppress noise.

[Problems to be solved by the device]

The conventional porous bead inductor is made by manual winding, there is a limit to increase the efficiency of manual work, and it is difficult to automate the winding work, so the processing cost is high. There was a problem.

The present invention provides a porous bead inductor that can be assembled using an automatic machine.

B. Configuration of the Invention [Means for Solving the Problems] In the present invention, a concave groove is provided on the upper surface of a porous bead core at every other adjacent through-hole, and the same number of required lengths as the through-holes of the porous bead core are provided. Align the conductors to the terminal block made of electrical insulating material at the positions of the through holes of the porous bead core, and attach the conductors vertically on the terminal block. Every other conductor is formed in a U shape on the lower surface of the terminal block so as to be connected, and the conductor is integrally molded with the terminal block to form the terminal block.

Each of the conductors on the terminal block is inserted into the through hole of the porous bead core, and the upper end portion of the conductor is joined by the concave groove of the porous bead core using a resin conductive material, or a good conductive material such as solder,
This is a porous bead inductor in which respective conductors are connected in series and a winding is applied to a porous bead core.

That is, according to the present invention, in a porous bead inductor in which a conductor is sequentially inserted through a through hole in a porous bead core in which a plurality of through holes are formed in parallel with the axial direction, the space between adjacent through holes is At every other position, corresponding to the porous bead cores having concave grooves on the upper surface and the through holes of the porous bead cores,
A through hole of the porous bead core is formed by vertically molding a conductor of a required length integrally on the upper surface, and a terminal block on the lower surface of which is connected to the through hole connected to the concave groove of the porous bead core in a U shape. A porous bead inductor having a structure in which a conductor of a terminal block is inserted through the upper surface of the porous bead core, the upper surface groove of the porous bead core is filled with a good electric conductor, and the conductor is sequentially inserted in series.

[Action]

When forming a porous bead inductor, conventionally, a conductive wire was manually passed through a through hole through a through hole to form a porous bead inductor, whereas the present invention adjusts the position of the through hole of the porous bead core. The concave groove provided between the through holes on the upper surface of the porous bead core and the conductor mounted on the terminal block made of an electrical insulating material, which is inserted into the through hole of the porous bead core, are connected so as to form a series circuit on an electric circuit. Therefore, by combining so that the conductor of the terminal block passes through the through hole of the porous bead core and filling and solidifying the concave groove on the upper surface of the porous bead core with solder or a conductive paste mixed with a thermosetting resin, regardless of manual winding Forming a winding on the porous bead core,
Form a porous bead inductor. A ferrite core having a high relative magnetic permeability characteristic is used as the porous bead core. Further, the structure of the porous bead inductor according to the present invention enables assembly by an automatic machine.

〔Example〕

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view of a porous bead inductor according to the present invention, in which a porous bead core 1 made of magnetic ferrite having a plurality of through holes and having a high relative magnetic permeability characteristic, a terminal block 3,
It is composed of pin terminals 41a and 41f to be mounted on a circuit board and a good conductive material 5 for connecting through holes on the upper surface of the porous bead core.

FIG. 2 shows the porous bead core 1 constituting the porous bead inductor of the present invention, the terminal block 3, and the conductors 4a to 4f. The porous bead core 1 shown in FIG. 2 (a) has a plurality of through holes. 2a to 2f are, for example, six ferrite cores formed in the figure, and in the figure, the through holes 2a and 2b, the through holes 2c and 2d, and the recessed groove 1 between the through holes 2e and 2f are formed on the upper surface of the ferrite core.
The shape is provided with a, 1c and 1e.

On the other hand, the terminal block 3 made of an electrically insulating material shown in FIG.
Is a diameter that can be inserted into the through holes 2a to 2f, and the copper rod-shaped conductors 4a to 4f are the through holes 2a to 4f of the porous bead core.
6 pieces are integrally molded at the position corresponding to 2f and the conductor 4a
Input / output terminals 41a and 41f are formed by connecting to 4f and penetrating the terminal block 3, and the conductors 4b and 4c and the conductors 4d and 4e are in a U-shape.
The lower surface of the conductor has a shape in which the conductors 41b and 41d conduct electricity.
The rod-shaped conductors 4a to 4f extend vertically on the upper end surface of the terminal block 3, and the length of the conductor is substantially the same as the length of the porous bead core (hereinafter referred to as the core) 1. Core 1 mentioned above
Because of the structure of the terminal block 3 and the through hole 2a of the core 1,
Insert conductors 4a to 4f into 2f and place on the top surface of terminal block 3,
Flow solder, which is a good conductor of electricity, is applied to the concave grooves 1a, 1c, 1e provided in the upper end of the core 1 in advance and heated by far infrared rays to connect the conductors by soldering, or a conductor wire mixed with resin By filling and solidifying the paste, the conductors 4a to 4f are connected in series, so that one winding is formed by sequentially winding the six through holes 2a to 2f reaching the input terminals 41a to 41f of the porous bead core. Wires are formed to form a porous bead inductor.

C. Effect of the Invention Since the present invention is configured as described above, it has the following effects.

A porous bead core having a plurality of through-holes and a concave groove passing through the through-holes on the upper surface, and a terminal block made of an electrically insulating material,
Corresponding to the position of the through hole of the porous bead core, it is planted vertically in the terminal block surface, and the conductor that passes through the through hole of the porous bead core on the lower surface of the terminal block is combined with the conductor formed to form the inductor, Since it is a porous bead inductor configured by filling the concave groove on the upper surface of the porous bead core with a good conductor, the winding does not require manual winding, it can be assembled using an automatic machine, mass production is possible, and it is inexpensive Can be provided to.

[Brief description of drawings]

FIG. 1 is a perspective view of a porous bead inductor according to the present invention. FIG. 2 shows components of the porous bead inductor according to the present invention, and FIG. 2 (a) is a perspective view of the porous bead core.
FIG. 2B is a perspective view showing the terminal block and the conductor. 1 ... Porous bead core, 1a, 1c, 1e ... Recessed groove, 2a, 2b, 2c, 2
d, 2f …… Through hole, 3 …… Terminal block, 4a, 4b, 4c, 4d, 4e, 4f…
… Conductor, 5 …… Good conductive material, 41a, 41f …… I / O terminal, 41
b, 41d ... conductor.

Claims (1)

[Scope of utility model registration request] 1. A porous bead inductor comprising a porous bead core in which a plurality of through holes are formed in parallel with an axial direction, and a conductor is sequentially inserted through the through holes in series. Porous bead cores with a groove on the upper surface of every other, and conductors of the required length are integrally molded and planted vertically on the upper surface at the positions corresponding to the through holes of the porous bead core, and the groove of the porous bead core is formed on the lower surface. With the terminal block in which the conductor connected to the through hole connected to is connected in a U shape, the conductor of the terminal block is inserted into the through hole of the porous bead core, the groove on the upper surface of the porous bead core is filled with a good electric conductor, and the conductor is connected in series. A porous bead inductor having a structure in which it is inserted in order.