JPS6244414Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a switch device with a noise filter that effectively blocks noise generated by opening and closing switches of various electrical devices.

When you open or close a switch on an electrical device that uses high voltage such as 100V or 200V (hereinafter simply referred to as "electrical device"), an arc is generated at the switch's contacts. The high-frequency noise generated by this arc uses the power supply line connected to the switch as a dielectric and has a negative impact on nearby electronic equipment, and the electromagnetic noise generated from the arc also has a negative impact on electronic equipment, so do not install electrical equipment near electronic equipment. I had a problem with it not being usable. One way to solve this problem is to install noise filters on both sides of the switch, but the problem remains that the noise electromagnetic waves generated by the arc have a negative effect on electronic equipment, and the noise filter must be installed separately. However, it has the disadvantage that it is cumbersome to handle and install.

In order to eliminate the conventional drawbacks, the present invention connects a first high frequency blocking filter to the input terminal side of the switch and a second high frequency blocking filter to the output terminal side,
The first and second high frequency blocking filters and the switch are housed in a shield box, an operation button for operating the switch is provided on the upper part of the shield box, and an input terminal and an output terminal are provided on the outside of both side plates. The purpose of this invention is to block high frequency noise and electromagnetic wave noise in the power supply line generated from the arc by opening and closing the switch, and to eliminate the troublesome work of handling and installing the high frequency blocking filter.

The present invention will be explained based on the drawings.

FIG. 1 shows an embodiment of the present invention. In the figure, 1 and 2 are terminals connected to the power supply line,
3 and 4 are terminals connected to the power supply line on the load side, 5 and 6
7 is a high frequency blocking filter that passes the power frequency and blocks unnecessary high frequency noise; 7 is a switch circuit;
8 is an operation button for opening and closing the switch circuit 7; 9 is a high frequency blocking filter 5, 6 and the switch circuit 7;
It is a shield box that integrates and stores.

The shield box 9 is made of a highly conductive metal such as copper or aluminum.

Next, the operation of the noise filter equipped switch device of the present invention will be explained.

In this structure, high frequency noise generated due to an arc generated when the operating button 8 is pressed to open or close the switch circuit 7 is attenuated by the high frequency blocking filters 5 and 6. Therefore, the amount of noise flowing into the feeder lines connected to the terminals 1 and 2 and the terminals 3 and 4 can be reduced, and the feeder lines can be prevented from becoming noise-inducing sources. Further, the shield box 9 can also shield noise electromagnetic waves generated by the arc. Since the shield box 9 is made of metal, it has a good shielding effect against frequency components of several 100 KHz or more, and the effect is improved if the shield box 9 is connected to the earth's potential. An example of the configuration of the high frequency blocking filters 5 and 6 is shown in FIG.

In the above embodiment, the case where the switch circuit 7 is provided between the terminals 1 and 3 has been described, but it is also possible to provide a switch circuit between the terminals 2 and 4 and open/close the switch circuit 7 at the same time. Similar effects can be obtained.

Based on the above configuration, the present invention can effectively eliminate the noise generated by the opening and closing of the switch circuit, and eliminate the negative effects on electronic equipment. Furthermore, since the high frequency blocking filter and the switch circuit are integrated and housed in the shield box, there are advantages such as eliminating troublesome handling and installation.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of the present invention, and FIG. 2 is a circuit diagram of a high frequency blocking filter. 1, 2: Terminal connected to the power supply line on the power supply side, 3,
4: Terminal connected to the power supply line on the load side, 5, 6: High frequency blocking filter, 7: Switch circuit, 8: Operation button, 9: Shield box.

Claims (1)

[Scope of utility model registration request] A first high frequency blocking filter is connected to the input terminal side of the switch, a second high frequency blocking filter is connected to the output terminal side of the switch, the first and second high frequency blocking filters and the switch are housed in a shield box, and the upper part of the shield box is A switch device with a noise filter, which has an operation button for operating the switch, and an input terminal and an output terminal on the outside of both side panels.