JPH01235206A - Surge noise absorber - Google Patents

Abstract

PURPOSE:To obtain a small-sized absorber of high performance which is excellent in suppression effect of surge noise, by providing a metal terminal penetrating a plurality of voltage-dependent nonlinear elements, and providing said terminal with a second metal terminal, via a cylindrical resin parts, in which a connected current fuse is contained. CONSTITUTION:A first metal terminal 14 penetrating a plurality of voltage- dependent nonlinear elements 11, 12 is provided, and inner peripheral electrodes 11b, 12b of the plurality of elements 11, 12 are electrically connected with the first metal electrode. Outer peripheral electrodes 11a, 12b are all electrically connected. A second metal terminal 8 is connected with the first metal terminal 14 via a cylindrical resin parts 10. Two end-portions situated on both sides of the metal terminal 8 has a structure to connect lead wires, and two ring type magnetic substances 9, 13 are respectively mounted on the two metal terminals in such a manner as to insert a plurality of elements between them. The cylindrical resin parts 10 contains, in its inside, a current fuse 17 connected in series with the two metal terminals.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is applicable to surges that enter from power lines and signal lines (induced lightning, surges caused by opening and closing of inductive loads, etc.) and to equipment malfunctions and television reception even though the voltage level is low. The present invention relates to surge noise absorbers for suppressing noise that causes noise in machines, radio receivers, etc., and particularly to surge noise absorbers used in input/output terminals of power lines and signal lines.

Conventionally, this type of surge noise absorber has been constructed using a disc-shaped voltage-dependent non-linear resistor element or a ceramic dielectric element having voltage-dependent non-linear resistance characteristics, as shown in FIG. In FIG. 6, a lead wire 21L is connected to the element main body 1.

2b is connected, and the entire element body 1 is covered with an exterior resin 3, and the lead wires 21L, )b are used to connect the power line input/output terminal section or the signal line input/output terminal section or the circuit section. It was used by being inserted and connected to.

In addition, as shown in FIG. 6, a disk-shaped voltage-dependent nonlinear resistor element or a ceramic dielectric element having voltage-dependent nonlinear resistance characteristics is used, and one electrode surface of the element main body 4 is Connect the leads lfMsa and sb, connect the lead wire 6C to the other electrode surface, and connect the lead wires 5a and 5b.
A surge noise absorber has also been used which has a structure in which bead-shaped ferrite magnetic bodies ea and eb are passed through each of the elements, and the entire element body 4 is covered with an exterior resin (not shown).

Problems to be Solved by the Invention With such a conventional configuration, it can only be used by newly attaching one or more parts to the terminal section, which poses problems in terms of ease of attachment and cost (cost of assembly, etc.). This poses a problem in that it hinders high integration of circuit boards.

In addition, there is a problem that the inductance component caused by the lead wire has a negative effect on the surge noise suppression effect.
Furthermore, in order to prepare for accidents caused by failure of the element, it was necessary to connect safety mechanisms such as current fuses externally.

The present invention is intended to solve these problems, and aims to provide a small, high-performance surge noise absorber that is excellent in suppressing surge noise.

Means for Solving the Problems In order to solve this problem, the present invention has a structure that functions as a terminal part and has a built-in safety mechanism in case of failure.

In the present invention, an annular voltage-dependent non-linear resistor element having electrodes on the circumferential surface and the outer circumferential surface or a ceramic dielectric element having voltage-dependent non-linear resistance characteristics is used alone or in combination, and a plurality of these elements are used. a first metal terminal penetrating through is provided, and each of the circumferential electrodes of the plurality of elements is electrically connected to the first metal terminal, and the outer circumferential electrodes of the plurality of elements are all electrically connected. a second metal terminal is connected to the first metal terminal passing through the plurality of elements via a cylindrical resin part,
Furthermore, the ends located on both sides of the two metal terminals have a structure for connecting lead wires, and a ring-shaped magnetic body is attached to each of the two metal terminals so as to sandwich the imaginary number element. Furthermore, the cylindrical resin part has a built-in current fuse connected in series with the two metal terminals.

With this configuration, voltage-dependent nonlinear elements (voltage-dependent nonlinear resistor elements or ceramic dielectric elements with voltage-dependent nonlinear resistance characteristics) that exhibit excellent surge noise suppression effects can be used in electronic equipment. A plurality of metal terminals are inserted between the first metal terminal, which can be used as is as an external terminal portion, and the outer circumferential electrodes, which are all electrically connected, making it possible to suppress surge noise.

In addition, since the element has a structure that does not use lead wires,
There is no adverse effect of the suppressing effect due to series inductance. Furthermore, it has a structure that can be used as an input/output terminal part of electronic equipment without using any other parts, and because it also connects a current fuse, it is excellent in terms of ease of installation and cost (including assembly costs). This enables high integration and miniaturization, and in the event of an accident due to failure of the element, a built-in current fuse operates to cut off the element from the power source. In addition, the inductance component due to the magnetic material will be inserted in series with the input and output lines,
This further improves the surge noise suppression effect.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a diagram showing a surge noise absorber according to an embodiment of the present invention. FIG. 1 is a half-sectional front view, and the same figure is a plan view. In FIG. 1, reference numeral 11 denotes a voltage-dependent nonlinear element made of, for example, a zinc oxide type voltage-dependent nonlinear resistor element, which has an annular shape.

11& is an outer peripheral electrode provided on the outer peripheral surface of the voltage-dependent non-linear element 11, and 11b is the voltage-dependent non-linear element 11.
This is a circumferential electrode provided on the inner circumferential surface of. Reference numeral 12 denotes an annular voltage-dependent non-linear element made of, for example, a ceramic dielectric element, and 12& and 12b denote an outer peripheral electrode and a circumferential electrode of this voltage-dependent non-linear element 12. Reference numeral 14 denotes a first metal terminal passing through the center of the voltage-dependent non-linear elements 11 and 12;
It is electrically connected to the inner Tokyo dens 411b and 12b. One end 14b of this first metal terminal 14
has a thread cut on the outside, and has a structure in which a metal nut 16 can be screwed onto it. The other end 14 & of this metal terminal 14 is connected to the voltage dependent non-linear element 11 , 1
A thread is cut through 2 and on the outside thereof,
A cylindrical resin part 1o with a thread cut on the inside can be fitted with a screw. A glass tube fuse 17 is housed inside the cylindrical resin component 1o, and its negative end is electrically connected to the other end 141L of the first metal terminal 14. The other end of the glass tube fuse 17 is electrically connected to one end 8b of a second metal terminal 8 screw-fitted to the other end of the cylindrical resin component 10. ing.

The other end 81L of the second metal terminal 8 is
As shown in the cross section, the inside is hollow so that a banana chip terminal (not shown) can be inserted therein, and a thread is cut on the outer peripheral surface. Reference numeral 7 denotes a resin part having a thread cut on the inner circumference side, which can be screwed into the threaded part of the other end 8a of the 20th metal cormorant terminal 8. It is designed to be used by winding a lead wire (not shown) and screwing it with this resin part 7. 1e is the outer peripheral electrode 11 of the voltage-dependent nonlinear element 11.12.
This is a connecting metal band that electrically connects 1L and 121L. Further, 9 and 13 are annular ferrite magnetic bodies attached to the second metal terminal 8 and the first metal terminal 14, sandwiching the voltage-dependent nonlinear element 11.12. ing.

FIG. 2 is a diagram showing a voltage-dependent nonlinear element constituting the surge noise absorber of the present invention, in which figure a is a plan view and figure 2 is a half-sectional front view. Moreover, FIG. 3 is a diagram showing a glass tube fuse that constitutes the surge noise absorber of the present invention.
The turtle in the figure is a front view, and the figure is a plan view. FIG. 4 shows an electrical equivalent circuit diagram when the surge noise absorber of the present invention is used.

In FIG. 3, 18 is a metal cap, 19 is a glass tube, and 2o is a wire fuse built into the glass tube 19. The glass tube fuse 17 is constructed by sandwiching the metal cap 18.

As described above, according to this embodiment, the connection metal band 16 is connected to the GND of the casing of an electronic device, etc., and the first metal terminal 1
An input/output line inside the electronic device is connected to the end 14b of the second metal terminal 8 with a metal nut 16, and a human output line from the outside is connected to the end 8a of the second metal terminal 8 using a banana chip terminal (not shown). If connected with the resin part 7, an electrical equivalent circuit as shown in FIG.
1.12 will be inserted in parallel, making it possible to suppress surge noise. The glass tube fuse 17, which functions as a power supply fuse, is inserted in the form shown in FIG. 4, and the voltage-dependent nonlinear element 11.
12 acts to cut off the current when an overcurrent flows due to a failure or the like.

In addition, since the voltage-dependent non-linear elements 11 and 12 have a structure that does not use + and +- leads, there is no negative effect of the suppressing effect due to series intellitance, and furthermore, without using another component, Since it has a structure that can be used as an input/output connector for electronic equipment, it is excellent in terms of ease of installation and cost (cost of assembly, etc.), and can be highly integrated.

In addition, in the above embodiment, the voltage dependent nonlinear element 9
A case has been described in which the voltage-dependent non-linear resistor element 1o is constituted by a ceramic dielectric element having voltage-dependent non-linear resistance characteristics, but this may be configured in the opposite manner. Further, it may be configured with only one of the elements. It is also conceivable to configure the device by combining three or more elements.

Effects of the Invention As described above, according to the present invention, a voltage-dependent nonlinear element having electrodes on the inner and outer surfaces, which exhibits an excellent suppressing effect on surge noise, can be used as an external terminal part of an electronic device. By inserting a plurality of metal terminals between the usable metal terminals and the outer circumferential electrodes that are all electrically connected, surge noise can be suppressed. Furthermore, in the event of an abnormality in the element, a built-in fuse is activated to prevent heat generation and water ejection.

Furthermore, since the voltage-dependent non-linear element has a structure in which no lead wire is used, there is no adverse effect of the suppressing effect due to series inductance.

Furthermore, since it has a structure that can be used as an input/output terminal part of electronic equipment without using any other parts, it is excellent in terms of installation and cost (including assembly costs), and can be highly integrated. The effect of miniaturization can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a surge noise absorber according to an embodiment of the present invention, in which FIG. FIG. 3 is a diagram showing a voltage-dependent nonlinear element; FIG. 3A is a plan view, FIG. Figure a is a front view, Figure 4 is a plan view, Figure 4 is a circuit diagram showing an electrical equivalent circuit when using the surge noise absorber of the present invention, Figures 6 and 7.
... Resin part, 8 ... Second metal terminal, Ba, Bb ... End of metal terminal 8, 9.13
... Ferrite magnetic material, 1o ... Cylindrical resin part, 11.12 ... Voltage dependent nonlinear element, 11a. 121L...Outer peripheral electrode, 11b, 12b...
...Circumferential electrode, 14...First metal terminal, 14L, 14b...End of metal terminal 14, 1
6...Metal nut, 1e...Metal band for connection, 17...Glass tube fuse. Name of agent: Patent attorney Toshio Nakao and one other person?
---'# PI M 8 items 8-・Fang 2 gold b) I Ib (+2b) / Figure 3

Claims (1)

[Claims] A ring-shaped voltage-dependent non-linear resistor element with electrodes provided on the circumferential surface and the outer circumferential surface or a ceramic dielectric element having voltage-dependent non-linear resistance characteristics is used alone or in combination, and a resistor that penetrates these plurality of elements is used. A structure in which a metal terminal is provided, and the circumferential electrodes of the plurality of elements are electrically connected to the first metal terminal, and the outer circumferential electrodes of the plurality of elements are all electrically connected. A second metal terminal is connected to the first metal terminal passing through the plurality of elements via a cylindrical resin part, and further the second metal terminal is connected to the first metal terminal passing through the plurality of elements.
The ends located on both sides of the two metal terminals have a structure for connecting lead wires, and a ring-shaped magnetic body is attached to each of the two metal terminals so as to sandwich the plurality of elements, and In the surge noise absorber, the cylindrical resin part has a built-in current fuse connected in series with the two metal terminals.