JPS63299718A - Surge noise absorber - Google Patents

Abstract

PURPOSE:To obtain an absorber which has a high surge suppressing effect to be highly integrated by penetrating an annular voltage dependent nonlinear resistor element through a metal terminal, and further attaching annular magnetic units and metal components for forming a gap so as to hold the element. CONSTITUTION:A voltage dependent nonlinear resistor element 6 provided with electrodes 7, 8 on both end faces is prepared, and a metal terminal 9 is penetrated to its inner periphery. A pair of annular metal components 14, 16 are attached to both end faces of the element 6 to electrically connect them to the electrodes 7, 8. Further, protrusions 15, 17 are formed on the outer peripheries of the components 14, 16 to form a discharge gap. Further, annular magnetic units 19, 20 are attached so as to hold the element 6. Thus, a large surge suppressing effect is obtained by the element 6, the gap and the inductances of the units 19, 20. Further, it is also used as an outer terminal section to be highly integrated.

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 switching on and off of inductive loads, etc.), as well as equipment malfunctions and televisions even though the voltage level is low. This is a surge noise absorber used to suppress noise that causes noise in television receivers, radio receivers, etc., and is particularly suitable for use in the input/output terminals of power lines and signal lines, and is used to suppress large current surges. This article concerns the target surge noise absorber.

Conventional technology Conventionally, as this type of surge noise absorber, the fourth
As shown in the figure, a disc-shaped voltage-dependent nonlinear resistor element or a ceramic dielectric element having voltage-dependent nonlinear resistance characteristics (hereinafter referred to as a voltage-dependent nonlinear element) is used. As shown in FIG. 4, this has a structure in which lead wires 2a and 2b are connected to opposing electrode (not shown) surfaces of the element main body 1, and the entire element main body 1 is covered with an exterior resin 3. The lead wires 2&, 2b were used by being inserted and connected to the terminals and circuit sections of the power line input/output section and the signal line input/output section.

In addition, as shown in FIG. 6, using the same disc-shaped voltage-dependent nonlinear element, lead wires 5&, 5b are connected to one electrode surface of the element main body 4, and lead wires 50t are connected to the other electrode surface.
A surge noise absorber is also used which has a structure in which the element main body 4 is entirely covered with an exterior resin (not shown in FIG. 6).

Furthermore, in areas where large surge currents are expected, individual components such as gas-filled gaps and air gaps may be inserted in parallel with the above surge noise absorber, as shown in the equivalent circuit in Figure 6. has been done.

Problems to be Solved by the Invention This conventional configuration can only be used by newly attaching one or more parts to the terminal section, and is disadvantageous in terms of ease of attachment and cost (assembling costs, etc.). There was a problem in that it hindered the high integration of circuit boards. Further, there is a problem in that the inductance component caused by the lead wire has a negative effect on the surge noise suppression effect.

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

Means for Solving the Problem In order to solve this problem, the present invention provides an annular voltage-dependent non-linear resistor element having electrodes on both end faces or a ceramic dielectric material having voltage-dependent non-linear resistance characteristics. A metal terminal is provided that penetrates the element, and a first metal component that is in contact with the electrode surface on one end face of the element is attached to the metal terminal, and the other end face of the element is electrically insulated from the metal terminal. A second metal part provided on the outer periphery of the metal terminal is connected in a manner such that the annular magnetic body is attached to the first metal terminal. Two metal terminals are attached so as to be located on the outside of the second metal component, and both ends of the metal terminal have a structure for connecting lead wires, and the two metal terminals are connected to both end surfaces of the element. All or part of the peripheral edges of the metal parts are made larger than the diameter of the element, and the entire or part of the peripheral edges of these metal parts constitutes a gap.

According to this configuration, a voltage-dependent nonlinear element (a voltage-dependent nonlinear resistor element or a ceramic dielectric element having voltage-dependent nonlinear resistance characteristics) that exhibits an excellent suppressing effect on surge noise, This means that it is inserted between a metal terminal that can be used as is as an external terminal part of an electronic device and a second metal component. Furthermore, the gap formed between the two metal parts is connected in parallel to the voltage-dependent nonlinear element. Therefore, when using the voltage-dependent non-linear element and a gap that allows arbitrary discharge distance settings to be provided between the metal terminal and the second metal component, it is possible to suppress surge noise, especially if the This makes it possible to suppress surge current. Furthermore, by arranging the magnetic material on both sides of the element, the resulting inductance component is inserted in series with the input line, further improving the surge suppression effect.

Further, since the 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 section of electronic equipment without using any other parts, it is easy to install and is cost-effective (including assembly costs), allowing for high integration and small size. This will result in the improvement of

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

FIGS. 1a and 1b are a half-sectional front view and a top view showing a surge noise absorber according to an embodiment of the present invention, and in FIG. Alternatively, it is a ceramic dielectric element (voltage-dependent non-linear element) having voltage-dependent non-linear resistance characteristics and has an annular shape. 7 is an electrode provided on one end surface of the element 6;
is an electrode provided on the other end surface of the element 6. Reference numeral 9 indicates a metal terminal passing through the center of the element 6, and reference numeral 1o indicates one end of the metal terminal 9. As shown in the cross section, there is a metal terminal inside the terminal so that a banana chip terminal (not shown) can be inserted therein. is hollow and has threads cut on the outer peripheral surface. Reference numeral 11 denotes a first resin part having a thread cut on the inner peripheral surface side, which can be screwed into the threaded part of one end 10 of the metal terminal 9. It is used by winding a lead wire (not shown) and screwing it onto the first resin part 11. Reference numeral 12 denotes the other end of the metal terminal 9 having a thread cut on the outer circumferential surface;
Connect a lead wire (not shown) to the metal nut 13.
It has a structure that can be secured with screws. A first metal part 14 is electrically connected to the electrode 7 on one end surface of the element 6, and is attached to the metal terminal 9 by screwing or the like and is electrically connected thereto. Reference numeral 16 indicates a downwardly projecting protrusion provided on the peripheral edge of the first metal component 14. Reference numeral 16 denotes a second metal component electrically connected to the electrode 8 on the other end surface of the element 6, and the metal terminal 9 is a cylindrical second resin component attached to the outer periphery of the metal terminal 9. It is electrically insulated by 18. Reference numeral 17 indicates an upwardly projecting protrusion provided on the peripheral edge of the second metal component 16, and a gap is formed between this protrusion 17 and the above-mentioned protrusion 16. 19 and 2o
is a magnetic material such as a ferrite magnetic material attached to the metal terminal 9 so as to sandwich the element 6 therebetween and to be located outside the first and second metal parts 14 and 16. Moreover, as shown in the figure, the first . Second metal part 14.16
has a peripheral edge larger than the diameter of the element 6,
In addition, a gap is formed on the outer periphery of the element 6 using protrusions 16 and 17.

Here, the first. All or part of the peripheral edge of the second metal part 14, 16 may be larger than the diameter of the element 6, and the first gear part 14, 16 may have a diameter larger than the diameter of the element 6. Second metal part 14.1
It may be constructed entirely or in part at the peripheral edge of 6. Furthermore, the projections 15.17 provided on the peripheral edges of the first and second metal parts 14.16 can form a gap without being separately provided.

Figures 2a and b are top and front views showing the voltage-dependent nonlinear element constituting the surge noise absorber of the present invention, and Figure 3 is the electrical equivalent when using the surge noise absorber of the present invention. A circuit diagram is shown.

As described above, according to this embodiment, the second metal component 16
Connect the input line inside the electronic device to the GND of the casing of the electronic device, etc., and connect the input line inside the electronic device to the end 12 of the metal terminal 9 using the metal nut 13.
If you connect the external input line to the end 10 of the metal terminal 9 with a banana chip terminal or the first resin part 11, an electrical equivalent circuit as shown in FIG. - GND and the voltage-dependent nonlinear element 6 are inserted in parallel with the gap, so that surge noise can be suppressed. Further, since the inductance by the magnetic bodies 19 and 20 is inserted in series with the input line, the surge suppression effect is further improved. Since the voltage-dependent non-linear element 6 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 allows it to be used as an input/output terminal part of electronic equipment without using any other parts.
Excellent in terms of ease of installation and cost (cost of assembly, etc.)
High integration is possible.

Effects of the Invention As described above, according to the present invention, a voltage-dependent nonlinear element having electrodes on both end faces, which exhibits an excellent suppressing effect on surge noise, can be used as a metal terminal that can be used as an external terminal part of an electronic device. and the second metal part, and the gap formed between the two metal parts is connected in parallel to the voltage-dependent nonlinear element. Therefore, when using the voltage-dependent non-linear element and a gap that allows arbitrary discharge distance settings to be provided between the metal terminal and the second metal component, it is possible to suppress surge noise, especially if the This makes it possible to suppress surge current. Furthermore, by arranging the magnetic material on both sides of the element, the resulting inductance component is inserted in series with the input line, further improving the surge suppression effect. and,
Since the voltage-dependent nonlinear 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 section of electronic equipment without using any other parts, it is easy to install and is cost-effective (including assembly costs), allowing for high integration and small size. This has the effect of increasing the number of people.

[Brief explanation of the drawing]

FIGS. 1a and 1b are a cross-sectional front view and a top view showing a surge noise absorber according to an embodiment of the present invention, and FIGS. 2a and 2b are voltage-dependent nonlinear elements constituting the surge noise absorber of the present invention. 3 is a diagram showing an electrical equivalent circuit when the surge noise absorber of the present invention is used, and FIGS. 4 and 6 are diagrams each showing a conventional surge noise absorber. , FIG. 6 is a diagram showing an electrical equivalent circuit of a circuit using a conventional surge noise absorber. 6... Voltage-dependent non-linear element (voltage-dependent non-linear resistor element or ceramic dielectric element having voltage-dependent non-linear resistance characteristics), 7, 8... Electrode on end surface , 9...Metal terminal, 10...One end, 11°°°・Pa first resin part, 12...
...Other end, 13...Metal nut, 14
・・・・・・First metal part, 15.17−°°・°
・Protrusion, 16...Second metal part, 18.
...Second resin parts, 19, 20...
・Magnetic material. Name of agent: Patent attorney Toshio Nakao and 1 other person6-
Jko (b) 1121!1 (ni) Za 3 Figure 4 Figure 5 Figure 6 Figure 6

Claims (1)

[Claims] A metal terminal is provided that penetrates an annular voltage-dependent non-linear resistor element having electrodes on both end faces or a ceramic dielectric element having voltage-dependent non-linear resistance characteristics, and this metal terminal is connected to one end face of the element. A first metal part in contact with the electrode surface is attached, and a second metal part provided on the outer periphery of the metal terminal is connected to the other end surface of the element in a manner that is electrically insulated from the metal terminal. , two annular magnetic bodies are attached to the metal terminal so as to be located outside the first and second metal parts, and both ends of the metal terminal have a structure for connecting a lead wire. Further, all or part of the peripheral edges of the two metal parts in contact with both end surfaces of the element are made larger than the diameter of the element, and the gap is formed by all or part of the peripheral edges of these metal parts. A surge noise absorber with a structure that