JPS63299714A - Surge noise absorber - Google Patents

Abstract

PURPOSE:To suppress a large surge current by penetrating an annular voltage dependent nonlinear resistor element provided with electrodes on both end faces through a metal terminal, and further attaching a pair of metal components for forming a gap. CONSTITUTION:An annular 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. An annular metal component 14 is attached to one end face of the element 6 to electrically connect the electrode 7 to the terminal 9, and another metal component 16 is attached through an insulator 18 to the other end face to electrically connect it to the electrode 8. Then, protrusions 15, 17 are oppositely formed on the outer peripheries of the components 14, 16 to form a discharge gap. Thus, a surge noise absorber can be also used as the outer terminal section of an electronic equipment to be highly integrated. Further, a surge current suppressing effect is enhanced.

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.
It has a structure in which the entire element body part 1 is covered with an exterior resin 3, and the lead wires 21L and 2b are used to insert and connect to the terminals and circuit parts of the power line input/output section and signal line input/output section. It has been used for many years.

Further, as shown in FIG. 5, using the same disc-shaped voltage-dependent nonlinear element, lead wires 51L and sb are connected to one electrode surface of the element body 4, and lead wires 6 to the other electrode surface.
A surge noise absorber is also used in which the element 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 metal terminal has a structure for connecting a lead wire at both ends, and the two metal parts in contact with both end surfaces of the element are connected. All or part of the peripheral edges of the metal parts are made thicker than the diameter of the element, and the whole 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. Further, 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, 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 denotes a metal terminal passing through the center of the element 6, and 1o denotes one end of the metal terminal 9. As shown in the cross section, there is a metal terminal inside 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, and is adapted to be screw-fitted with the threaded part of one end 10 of the metal terminal 9. Lead I! (not shown) is wound and screwed onto the first resin part 11 for use. Reference numeral 12 designates the other end of the metal terminal 9 which has a thread cut on the outer circumference side. A lead wire (not shown) is connected to this other end 12, and the metal nut 1 is connected to the other end 12.
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 15 indicates a downwardly projecting protrusion provided on the peripheral edge of the first metal component 14. 16 is an electrode 8 on the other end surface of the element 6
017 is a second metal part electrically connected to the metal terminal 9, and is electrically insulated from the metal terminal 9 by a second resin part 18 having a cylindrical shape attached to the outer periphery of the metal terminal 9. A protrusion protruding upwardly provided on the peripheral edge of this second metal component 16 is shown, and a gap is formed between this protrusion 17 and the protrusion 15 described above. As shown in the figure, the first
．． The second metal part 14.16 has a peripheral edge that is connected to the element θ.
A gap is formed at the outer periphery of the element 6 using protrusions 15 and 17.

Here, the first. All or part of the peripheral edge of the second metal part 14, 16 may be thicker than the diameter of the element 6, and the gap between the first and second metal parts 14, 16 should be larger than the diameter of the element 6. Second metal part 14.
What is necessary is just to consist of the whole or a part of the peripheral part of 16. Also, 1st. Second metal part 14.16
The protrusions 16, 1γ provided on the peripheral edge 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 the external input line is connected to the end 1o of the metal terminal 9 using 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 voltage-dependent non-linear element 6 has a structure in which no lead wire is used, 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 section of electronic devices without using any other parts, so it is easy to install and has low costs (including assembly costs), making it possible to achieve high integration. be.

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, 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 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. 0.

[Brief explanation of 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 FIGS. 2a and 2b are voltage-dependent nonlinear structures constituting the surge noise absorber of the present invention. A top view and a front view of the device, FIG. 3 is a diagram showing an electrical equivalent circuit when using the surge noise absorber of the present invention, and FIGS. 4 and 6 are diagrams 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, 1o... One end, 11... First resin part, 12...
...Other end, 13...Metal nut, 1
4...First metal part, 15.17...
...Protrusion, 16...Second metal part, 18
...Second resin part. Name of agent: Patent attorney Toshio Nakao and one other person
-Miko 7, lJ -II ff7 electrode? -Zenwei J1 child to, rz-s 1 14J4--1 year old 11 year old 2 metal M edition 15, n-・-
Projection Figure 2 Figure 3 Figure 4 Figure 5

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. , both ends of the metal terminal have a structure for connecting lead wires, and 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. , a surge noise absorber having a structure in which a gap is formed entirely or partially at the periphery of these metal parts.