JPH01222623A - Surge noise absorber - Google Patents

Abstract

PURPOSE:To absorb the surge effectively, by respectively connecting the one side of the electrode surface provided on both sides of a voltage dependent nonlinear resistor element to the 1st metal terminal directly and the other side thereof to the 2nd metal terminal through a resin tube which a fuse tube is built in. CONSTITUTION:Electrodes 7 and 8 are formed on both surfaces of a resistor element endowed with a voltage dependent nonlinear characteristic or a ceramic derivative element 6 having the similar characteristic. The 1st metal terminal 9 passing through the element 6 is connected to the one electrode 8 with the 1st metallic part 10. The other electrode 7 is connected to the 2nd metal terminal 15 through the 2nd metallic part 18 and a cylindrical resin part 13 which a glass tube fuse 14 is built in. To a terminal 16 to which the metal terminal 15 is extended a resin part 17 is screwed on and a lead wire wound around the terminal 16 is screwed up. The 1st metal terminal thereby serves as an external terminal of an electronic equipment as well, so that miniature equipment superb in surge noise absorption are manufactured.

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
A ceramic dielectric element (hereinafter referred to as a voltage-dependent non-linear element) having a voltage-dependent non-linear resistance characteristic is still used as a disc-shaped voltage-dependent non-linear resistor element as shown in the figure. As shown in FIG.
・A structure 3 in which the entire element body 1 is covered with an exterior resin 3.

It was used by being inserted and connected to the terminals and circuit parts of the power line input/output section and the signal line input/output section using lead wires 2a and 2b.

Still, as shown in FIG. 6, using the same disc-shaped voltage-dependent nonlinear element, lead wires sa and sb are connected to one electrode surface of the element main body 4, and lead wire 5C is connected to the other electrode surface. A surge noise absorber is also used in which the element main body 4 is entirely covered with an exterior resin (not shown in FIG. 5).

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 part, and it is difficult to install and to assemble. There was a problem in that it hindered the high integration of circuit boards.There was still a problem that the inductance component caused by the lead wire had 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 Problems In order to solve this problem, the surge noise absorber of the present invention has a structure that functions as a terminal part and is provided with a safety mechanism in the event of a failure. In the present invention, a first metal terminal is provided that penetrates the annular voltage-dependent nonlinear resistor element having electrodes on both end faces, or a ceramic dielectric element having voltage-dependent nonlinear resistance characteristics. A first metal part in contact with the electrode surface on one end face of the element is attached to the metal terminal of the element, and a cylindrical part provided on the outer periphery of one end of the first metal terminal is attached to the other end face of the element. A second metal part provided in an air-insulated manner is connected to the resin part, and a second metal part is connected to the end of the cylindrical resin part opposite to the second metal part. 2 metal terminals are provided, one end portion of each of the two metal terminals located at both ends has a structure for connecting a lead wire, and the cylindrical resin part has the two metal terminals inside thereof. It has a built-in current fuse connected in series with the terminal.

5 Beno effect According to this configuration, a voltage-dependent non-linear element (voltage-dependent non-linear resistor element, ceramic dielectric element having voltage-dependent non-linear resistance characteristics) exhibits an excellent suppressing effect on surge noise. ) is inserted between the first metal terminal and the second metal part, which can be used as is as an external terminal part of an electronic device, and a current fuse is also connected. If one metal part is connected to the GND part of the electronic device, an element is inserted between the line and GND, and if it is connected to the other line,
It will be inserted between the lines.

In addition, the structure does not use lead wires for the element,
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, it can be used as an input/output terminal part of electronic equipment.
Excellent in terms of wearability and cost (comparison costs etc.),
High integration is possible and miniaturization is possible.

Example 6 From page 6 onwards, 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.

In FIG. 1, 6 is, for example, a zinc oxide type voltage-dependent non-linear resistor element or a ceramic dielectric element (voltage-dependent non-linear element) having voltage-dependent non-linear resistance characteristics.
It has a ring shape. 7 is an electrode provided on one end surface of the element 6, and 8 is an electrode provided on the other end surface of the element 6. Reference numeral 9 denotes a first metal terminal that passes through the center of the element 6 and is electrically connected to the end surface electrode 8 via the metal component 10.
It can be fitted with a 0-inch screw. 11 is the first above
One end of the metal terminal 9 has a thread cut on the outer peripheral surface, and a lead wire (not shown) can be connected to this end 11 and screwed with a metal nut 12. It has become. A thread is cut on the outer peripheral surface of the other end of the first metal terminal 9 that passes through the element 6, and a thread 7 is cut on the inner peripheral surface of the cylindrical resin. One end of the manufactured part 13 is screw-fitted. A glass tube fuse 14 is housed inside the cylindrical resin component 13, and one end thereof is electrically connected to the other end of the first metal terminal 9. The other end of the fuse 14 is connected to a second metal terminal 15 which is screw-fitted to the other end of the cylindrical resin component 13.
is electrically connected to one end of the metal terminal 9.
15 and the fuse 14 are connected in series. The second metal terminal 15 has a thread cut on the outer circumference side of one end thereof, and is threaded into a thread cut on the inner circumference side of the other end of the cylindrical resin component 13. has been done. As shown in the cross-sectional view, the other end 16 of the second metal terminal 16 has a hollow interior so that a banana chip terminal can be inserted therein, and a thread is cut on the outer peripheral surface thereof.

Reference numeral 17 denotes a resin part with a thread cut on the inner circumferential surface, which can be screwed into the other end 16 of the second metal terminal 15, and has a lead at the other end 16. line(
(not shown) is wound and screwed with resin parts 17 for use.

Reference numeral 18 denotes a second ring-shaped metal part that is electrically connected to the single-force end electrode 7 of the element 6, and is electrically connected to the first metal terminal 9 by the cylindrical resin part 13. The second metal part 18 is attached to the cylindrical resin part 13 by screwing or the like.

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 3a is
, b are a front view and a top view of a glass tube fuse used in an embodiment of the present invention, 19 is a metal cap, 20 is a glass tube, and 21 is a wire fuse built in the glass tube 2o. It shows.

Still, FIG. 4 shows an electrical equivalent circuit diagram when the surge noise absorber of the present invention is used.

As described above, according to this embodiment, the second metal component 18
Connect to the GND of the casing of the electronic device, etc., and connect the lead wire inside the electronic device to the end 11 of the first metal terminal 9 with a metal nut 12. If an external input/output lead wire is connected to the end 16 of the metal terminal 15 using a banana chip terminal, an electrical equivalent circuit as shown in FIG. By inserting the linear element 6, surge noise can be suppressed. Furthermore, the current fuse 14 is not inserted in the form shown in the figure, and functions to cut off the current if an overcurrent flows due to a failure of the element 6 or the like.

Furthermore, the structure does not use lead wires for the elements,
Moreover, since it has a three-terminal structure, there is no adverse effect of the suppressing effect due to series inductance.

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

Effects of the Invention As described above, according to the present invention, a voltage-dependent non-linear element having electrodes on both end faces, which exhibits an excellent suppressing effect on surge noise, can be used as is as an external terminal section of an electronic device. In addition, the current fuse is also connected in series with the input/output line, which suppresses surge noise. A small, high-performance surge noise absorber with excellent suppression effects can be provided. Also,
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 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 showing the element; FIGS. 3a and 3b are a front view and a top view of a glass tube fuse used in an embodiment of the present invention;
The figure shows an electrical equivalent circuit 11-7 when the surge noise absorber of the present invention is used, and FIGS. 5 and 6 respectively show conventional surge noise absorbers. 6 ・Voltage-dependent non-linear element (voltage-dependent non-linear resistor element, still ceramic dielectric element having voltage-dependent non-linear resistance characteristics), 7, 8 ... Electrode on end face, 9 ...
First metal terminal, 10...First metal component, 11.
- End, 12--Metal nut, 13--Cylindrical resin part, 14--Current fuse, 15-Second metal terminal, 16--End, 17--Resin parts, 18
...Second metal part. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
Figure 3 Figure 5 Figure 6 Child

Claims (1)

[Claims] A first metal terminal penetrating the 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 is provided, and the first metal terminal is provided with the above-mentioned A first metal part in contact with the electrode surface on one end face of the element is attached, and a cylindrical resin part provided on the outer periphery of one end of the first metal terminal is attached to the other end face of the element. A second metal part provided in an electrically insulated manner is connected, and a second metal terminal is provided at an end of the cylindrical resin part opposite to the second metal part, One end portion of each of the two metal terminals located at both ends has a structure for connecting a lead wire, and the cylindrical resin part has an electric current connected therein in series with the two metal terminals. A surge noise absorber with a built-in fuse.