JP2600172B2 - Surge noise absorber - Google Patents

Description

Description: BACKGROUND OF THE INVENTION The present invention relates to a surge (induction lightning, surge caused by opening and closing of an inductive element) penetrating from a power supply line and a signal line, a malfunction of a device having a low voltage level, and a television. John receiver,
The present invention relates to a surge noise absorber for suppressing noise that causes noise in a radio receiver or the like, and more particularly to a surge noise absorber used for an input / output terminal of a power supply line or a signal line.

2. Description of the Related Art Conventionally, as this type of surge noise absorber, a disk-shaped voltage-dependent nonlinear resistor element or a ceramic dielectric element having a voltage-dependent nonlinear resistance characteristic as shown in FIG. Hereinafter, a voltage-dependent nonlinear element will be used. This is, as shown in FIG.
Lead wires 2a, 2b are connected to the surfaces of the electrodes (not shown) facing each other, and the entire element body 1 is covered with an exterior resin 3, and the power wires are provided using the lead wires 2a, 2b. They were used by being inserted and connected to terminals and circuit portions of input / output units and signal line input / output units.

As shown in FIG. 5, a disk-shaped non-linear voltage-dependent element is also used, and lead wires 5a and 5b are connected to one electrode surface of the element body 4 and a lead wire 5c is connected to the other electrode surface. And a surge noise absorber having a structure in which the entire element body 4 is covered with an exterior resin (not shown in FIG. 5).

Problems to be Solved by the Invention In such a conventional configuration, one or more components can be used only in a form in which one or more components are newly mounted on the terminal portion, and there are problems in terms of mountability and cost (such as assembly cost). Therefore, there is a problem that high integration of the circuit board is hindered. Further, there is a problem that the inductance component caused by the lead wire adversely affects the surge noise suppressing effect.

An object of the present invention is to solve such a problem, and an object of the present invention is to provide a compact and high-performance surge noise absorber excellent in a surge noise suppressing effect.

Means for Solving the Problems To achieve this object, a surge noise absorber of the present invention has two annular ceramic elements having electrodes on both end surfaces only and having a voltage-dependent nonlinear resistance characteristic,
A metal terminal provided through the two ceramic elements and a metal terminal provided between electrodes on opposite sides of the two ceramic elements so as to be in an insulated state and connected to the electrodes. And the other electrode of the ceramic element is electrically connected to the metal terminal, and both ends of the metal terminal have a structure for connecting lead wires.

According to this configuration, the voltage-dependent non-linear element (voltage-dependent non-linear resistor element or ceramic dielectric element having the voltage-dependent non-linear resistance characteristic) exhibiting an excellent suppression effect on the surge noise is provided. Two metal terminals are inserted between a metal terminal that can be used as an external terminal of an electronic device and a metal component, so that surge noise can be suppressed. Further, since the two elements have a structure in which no lead wire is used, there is no adverse effect of the suppression effect due to the series inductance. Furthermore, it has a structure that can be used as an input / output terminal of electronic equipment without using other parts, so it is excellent in terms of mountability and cost (assembly cost etc.), high integration is possible and miniaturization is possible Can be achieved.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIGS. 1A and 1B are a front view and a half-sectional view, respectively, showing a half-section of a surge noise absorber according to an embodiment of the present invention. In FIG. A voltage-dependent non-linear element composed of a linear resistor element, and has a ring shape. Reference numeral 7 denotes an electrode provided on one end face of the element 6, and reference numeral 8 denotes an electrode provided on the other end face of the element 6.
Reference numeral 9 denotes an annular voltage-dependent nonlinear element made of, for example, a ceramic dielectric element having voltage-dependent nonlinear resistance characteristics. Reference numerals 10 and 11 denote electrodes provided on one end face and the other end face of the element 9, respectively. Is shown. 12 is the above element 6, 9
The connecting arm 13 is electrically connected to the electrode 7 on one end face of the element 6.
Reference numeral 14 denotes one end of the metal terminal 12, which has a hollow inside so that a banana chip terminal (not shown) can be inserted as shown in the cross section, and has a thread cut on the outer peripheral surface side. is there. Reference numeral 15 denotes a first resin component having a thread cut on an inner peripheral surface thereof, which can be screw-fitted to a threaded portion of one end 14 of the metal terminal 12. A lead wire (not shown) is wound around and screwed with a first resin component 15 for use. 16 is provided on the outer periphery of the metal terminal 12 between the elements 6 and 9, and the electrode 8 on the other end face of the element 6 is provided.
And an annular metal part electrically connected to the electrode 11 on the other end face of the element 9, and the metal terminal 12 is formed by a cylindrical second resin part 17 mounted on the outer periphery of the metal terminal 12. It is electrically insulated. Reference numeral 18 denotes a metal nut which is electrically connected to the electrode 10 on one end face of the element 9 and is attached to the metal terminal 12 by screwing or the like, and is electrically and mechanically connected thereto. 19 is the other end of the metal terminal 12 having a thread cut on the outer peripheral surface side, and the other end 19
A lead wire (not shown) is connected to the connector, and a metal nut 20 can be used for screwing.

2 (a) and 2 (b) are a top view and a front view showing a voltage-dependent nonlinear element constituting the surge noise absorber of the present invention, and FIG. 3 shows a case where the surge noise absorber of the present invention is used. 2 shows an electrical equivalent circuit diagram of FIG.

As described above, according to the present embodiment, the metal component 16 is connected to the GND of the housing of the electronic device, and the input line portion inside the electronic device is connected to the end 19 of the metal terminal 12 with the metal nut 20. If an input line from the outside is connected to the end 14 of the metal terminal 12 with a banana chip terminal or a first resin part 15, an electrically equivalent circuit as shown in FIG. Since the voltage-dependent nonlinear elements 6 and 9 are inserted in parallel between them, surge noise can be suppressed. Further, since the voltage-dependent nonlinear elements 6 and 9 have a structure in which no lead wire is used, there is no adverse effect of the suppression effect due to the series inductance. Furthermore, since it has a structure that can be used as an input / output terminal of an electronic device without using another component, it is excellent in terms of mountability and cost (such as assembly cost), and high integration is possible.

In the above embodiment, the case where the element 6 is constituted by a voltage-dependent nonlinear resistor element and the element 9 is constituted by a ceramic dielectric element having a voltage-dependent nonlinear resistance characteristic has been described. May be used, or only one of the elements may be used. Also,
The electrode 7 on one end surface of the element 6 and the metal terminal 12 are electrically connected by a connecting arm 13 provided integrally with the metal terminal 12, but this is screwed into the metal terminal 12. Alternatively, the electrical connection may be made using a separate metal nut attached by, for example, the electrical connection between the electrode 10 on one end face of the element 9 and the metal terminal 12. Alternatively, the connection may be performed by a connecting arm provided integrally with the connection arm 12.

Advantageous Effects of the Invention As described above, according to the present invention, a voltage-dependent nonlinear element provided with electrodes on both end faces that exhibits excellent suppression effect against surge noise can be used as an external terminal of an electronic device as it is as a metal terminal And two metal parts are inserted between them, so that surge noise can be suppressed.
Further, since the voltage-dependent nonlinear element has a structure in which no lead wire is used, there is no adverse effect of the suppression effect due to the series inductance. Furthermore, it has a structure that can be used as an input / output terminal of electronic equipment without using other parts, so it is excellent in terms of mountability and cost (assembly cost etc.), high integration is possible and miniaturization is possible Is obtained.

[Brief description of the drawings]

1 (a) and 1 (b) are a half sectional front view and a top view showing a surge noise absorber according to one embodiment of the present invention, and FIGS. 2 (a) and (b) are surge noise absorbers of the present invention. FIG. 3 is a top view and a front view showing a voltage-dependent nonlinear element constituting the device, FIG. 3 is a diagram showing an electrical equivalent circuit when the surge noise absorber of the present invention is used, and FIGS. It is a figure showing the 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 characteristic), 7, 8, 10, 11 ... electrodes on end face, 12 ... Metal terminal, 13 ... Connection arm, 14 ... One end, 15 ...
1st resin part, 16 ... metal part, 17 ... 2nd resin part, 18 ... metal nut, 19 ... other end, 20
...... Metal nut.

Claims (1)

(57) [Claims] 1. Two annular ceramic elements having electrodes only on both end faces and having voltage-dependent nonlinear resistance characteristics, a metal terminal penetrating through these two ceramic elements, and said two ceramic elements. A metal part provided between the electrodes on the opposite side so as to be insulated from the metal terminal and connected to the electrode, and the other electrode of the ceramic element is connected to the metal terminal. A surge noise absorber which is electrically connected to each other and has a structure for connecting a lead wire at both ends of the metal terminal.